Recent trends in leather making: Processes, problems, and pathways

Critical Reviews in Environmental Science and Technology

Volumn 35, Issue 1, 2005, Pages 37-79

  Thanikaivelan, Palanisamy ^a   Rao, Jonnalagadda Raghava ^b   Nair, Balachandran Unni ^b   Ramasami, Thirumalachari ^c  

^a Ctr Leather Apparels/Accessories D   (India)

^b Chemical Laboratory   (India)

^c CENTRAL LEATHER RESEARCH INSTITUTE   (India)

Author keywords

Chemical oxygen demand; Dehairing; Effluent treatment; Enzyme; Fiber opening; Leather processing; Pollution; Sludge; Tanning; Total solids

Indexed keywords

EFFLUENTS; ENVIRONMENTAL PROTECTION; HEALTH RISKS; LAWS AND LEGISLATION; REGULATORY COMPLIANCE; SEWAGE SLUDGE; TANNING; TOXIC MATERIALS;

CHROME SLUDGE; LEATHER PROCESSING INDUSTRY; TANNERY; TOXIC GASES;

LEATHER;

AMMONIA; AROMATIC AMINE; CARCINOGEN; CHROMIUM; HEAVY METAL; HYDROGEN SULFIDE; SULFUR; TOXIC GAS; VOLATILE ORGANIC COMPOUND;

SLUDGE; TANNERY; WASTEWATER TREATMENT;

DEVELOPING COUNTRY; EFFLUENT; ENVIRONMENTAL FACTOR; ENVIRONMENTAL PROTECTION; GOVERNMENT; HEALTH HAZARD; LEATHER INDUSTRY; POLLUTION; PROCESS DESIGN; REVIEW; SLUDGE; SOLID WASTE; WASTE MANAGEMENT;

EID: 11144243644     PISSN: 10643389     EISSN: None     Source Type: Journal    
DOI: 10.1080/10643380590521436     Document Type: Review

References (270)

1. Aloy, M., Mermet, R., and Sanejouand, J. Biomethanization of tannery waste: An industrial experiment, J. Am. Leather Chem. Assoc. 84, 97-109, 1989.
2. Anderson, R.A., Cheng, N.Z., Bryden, N.A., Polansky, M.M., Cheng, N.P., and Chi, J.M. Elevated intakes of supplemental chromium improve glucose and insulin variables in individuals with type 2 diabetes, Diabetes 46, 1786-1791, 1997.
3. Aravindhan, R., Madhan, B., Rao, J.R., Nair, B.U., and Ramasami, T. Bioaccumulation of chromium from tannery wastewater: An approach for chrome recovery and reuse, Environ. Sci. Technol. 38, 300-306, 2004.
4. Aravindhan, R., Saravanabhavan, S., Thanikaivelan, P., Chandrasekaran, B., Rao, J.R., and Nair, B.U. A bio-driven lime and pickle free tanning paves way for greener garment leather production, J. Am. Leather Chem. Assoc. 99, 53-66, 2004.
5. Arslan, P., Beltrame, M., and Tomasi, A. Intracellular chromium reduction, Biochim. Biophys. Acta 931, 10-15, 1987.
6. Bailey, D.G. Preservation of cattle hides with potassium chloride, J. Am. Leather Chem. Assoc. 90, 13-20, 1995a.
7. Bailey, D.G. Ecological concepts in rawhide conservation (preservation), World Leather 8(3), 43-47, 1995b.
8. Bailey, D.G. Gamma radiation preservation on cattle hides. A new twist on an old story, J. Am. Leather Chem. Assoc. 94, 259-266, 1999.
9. Bailey, D.G., and Haas, M.J. Electron beam irradiation of fresh hides, salted hides and leather. Microbial control and effect of physical properties, J. Am. Leather Chem. Assoc. 83, 46-55, 1988.
10. Bailey, D.G., DiMaio, G.L., Gehring, A.G., and Ross, G.D. Electron beam irradiation preservation of cattle hides in a commercial-scale demonstration, J. Am. Leather Chem. Assoc. 96, 382-392, 2001.
11. Bailey, D.G., Hopkins, W.J., Taylor, H.H., Filachione, E.M., and Koeppen, R.G. Preservation of hides with sulfite III. Statistical evaluation of shoe upper leather prepared in a matched side study of brine cured and sulfite-acetic acid treated cow hides, J. Am. Leather Chem. Assoc. 71, 400-408, 1976.
12. Bailey, D.G., Tunick, M.H., and Kuzma, M.A. Effect of sulfide, chromium and phosphate ions on methane production by an anaerobic sludge acclamatised of tannery beamhouse effluent, Proceedings of the 14th Industrial Waste Mid Atlantic Conference, 1982.
13. Balamurugan, K., Vasant, C., Rajaram, R., and Ramasami, T. Hydroxopentammine chromium(III) promoted phosphorylation of bovine serum albumin: Its potential implications in understanding biotoxicity of chromium, Biochim. Biophys. Acta 1427, 357-366, 1999.
14. Balasubramani, M., Babu, M., and Sehgal, P.K. In vitro biocompatibility test for collagen-based dressings, In Vitro Cell Dev. Biol. Anim. 33, 223-227, 1997.
15. Barrett, J.C. Short-term preservation of hides in Zimbabwe, J. Soc. Leather Technol. Chem. 70, 83-89, 1986.
16. Bartlett, R.J., and James, B.R. Oxidation of chromium in soils, J. Environ. Qual. 8, 31-35, 1979.
17. Bartlett, R.J., and Kimble, J.M. Behaviour of chromium in soils: II. Hexavalent forms, J. Environ. Qual. 5, 383-385, 1976.
18. Bartlett, R.J. Chromium cycling in soils and water: Links, gaps and methods, Environ. Health Perspect. 92, 17-24, 1991.
19. BASF, Information on legislation and consumer protection, World Leather August/September, 65-67, 1998.
20. Beyersmann, D., and Koster, A. On the role of trivalent chromium in chromium genotoxicity, Toxicol. Environ. Chem. 14, 11-22, 1987.
21. Bienkiewicz, K. Physical Chemistry of Leather Making, Robert E. Krieger, Malabar, FL, 1983.
22. Biles, J., DiCandilo, N., Gehlhaus, P., and Prentiss, W.C. Viscosity parameters of finishes applied by roll and precision coating, J. Am. Leather Chem. Assoc. 80, 284-292, 1985.
23. Biles, J. Parameters in the application of water based topcoats, J. Am. Leather Chem. Assoc. 85, 163-178, 1990.
24. Borge, J.O. Leather processing for area yield, J. Soc. Leather Technol. Chem. 70, 111-113, 1986.
25. Bose, S.M. Enzymatic unhairing, Leather Sci. 2, 140-144, 1955.
26. Brady, D., Duncan, J.R., and Russell, A.E. A model for proteolytic depilation of skins, J. Am. Leather Chem. Assoc. 85, 334-342, 1990.
27. Buljan, J. Pollution limits for discharge of tannery effluents in water bodies and sewers, World Leather November, 65-68, 1996.
28. Buljan, J., Sahasranaman, A., Sampathkumar, S., Mani, A., and Venkatesh, A. Accelerated evaporation of saline streams in solar pans, Proceedings of the XXVI IULTCS Congress, Cape Town, 2001.
29. Burrows, G.H. Clean technology in the processing of leather, Proceedings of the XXVI IULTCS Congress, Cape Town, 2001.
30. Gantera, C.S. The hair-saving unhairing process, World Leather 11(7), 29, 1998.
31. Gantera, C.S., Angelinetti, A.R., Altobelli, G., and Gaita, G. Hair saving enzyme assisted unhairing: Influence of enzymatic products upon final leather quality, J. Soc. Leather Technol. Chem. 80, 83-86, 1996.
32. Chakravorthy, H.P., and Nursten, H.E. Uncommon inorganic tannages, J. Soc. Leather Technol. Chem. 42, 2-22, 1958.
33. Chandrababu, N.K., Rao, J.R., Rao, P.S., Ramesh, R., Babu, M.S., Ramasami, T., Langerwerf, J.S.A., Covington, A.D., and Walker, W.P. Low waste closed loop chrome tanning method, Proceedings of the 30th LERIG, Chennal, 23-36, 1995.
34. Chandrasekaran, B. An approach towards better exhaustion chrome in tanning, Leather Sci. 34, 91-102, 1987.
35. Chandrasekaran, B., Rao, J.R., Prasad, E.G.S., and Nair, B.U. Management of chromium wastes in tanneries, J. Ind. Assoc. Environ. Manage. 16, 168-173, 1989.
36. Chandrasekaran, B., Rao, J.R., Sreeram, K.J., Nair, B.U., and Ramasami, T. Chrome tanning: State-of-art on the material composition and characterisation, J. Sci. Ind. Res. 58, 1-10, 1999.
37. Cluthe, C.E., Desiderio, F.A., and Prentiss, W.C. Aqueous topcoats for leather, J. Am. Leather Chem. Assoc. 73, 22-29, 1978.
38. Corning, D.R., Cory, N.J., Nott, S.W., and Sykes, R.L. The impact of air pollution controls on tannery operations, J. Soc. Leather Technol. Chem. 75, 183-189, 1991.
39. Costa, M. DNA-protein complexes induced by chromate and other carcinogens, Environ. Health Perspect. 92, 45-52, 1991.
40. Covington, A.D. The use of aluminium(III) to improve chrome tannage, J. Soc. Leather Technol. Chem. 70, 33-38, 1986.
41. Covington, A.D. Modern tanning chemistry, Chem. Soc. Rev. 26, 111-126, 1997a.
42. Covington, A.D. Chrome management, Proceedings of the 32nd LERIG, Chennai, 97-128, 1997b.
43. Covington, A.D. New tannages for the new millennium, J. Am. Leather Chem. Assoc. 93, 168-182, 1998.
44. Covington, A.D., and Shi, B. High stability organic tanning using plant polyphenols. Part 1. The interactions between vegetable tannins and aldehydic cross linkers, J. Soc. Leather Technol. Chem. 82, 64-71, 1998.
45. Covington, A.D., Lambard, G.S., and Pennington, M. An investigation of titanium(III) as a tanning agent, J. Soc. Leather Technol. Chem. 82, 78-80, 1998.
46. Covington, A.D., Sykes, R.L., Barlow, J.R., and White, E.T. A practical chrome recovery system using magnesium oxide, J. Soc. Leather Technol. Chem. 67, 5-12, 1983.
47. Cranston, R.W., Davis, M.H., and Scroggie, J.G. Development of the Sirolime unhairing process, J. Am. Leather Chem. Assoc. 81, 347-355, 1986a.
48. Cranston, R.W., Davis, M.H., and Scroggie, J.G. Practical considerations on the Sirolime process, J. Soc. Leather Technol. Chem. 70, 50-55, 1986b.
49. Cuq, M.H., and Delmas, M. The Cr.A.B. process: A new ecological process for the transformation of pickled hides into leather Part 3: Fatliquoring, J. Soc. Leather Technol. Chem. 83, 210-214, 1999.
50. Daniels, R. Overview: Avoiding salts, World Leather 10(7), 41, 1997.
51. Daniels, R.P. Working with nature: reed bed technology, World Leather 8(5), 41-45, 1995.
52. Dartsch, P.C., Kimmel, R., Schmahl, F.W., and Germann, H.P. Nephrotoxic and hepatotoxic effects of a chromium(VI) compound in comparison to a basic chromium(III) tanning agent, World Leather May, 66-70, 1998.
53. Dasgupta, S. Minimising the environmental impact of chrome tanning: The ThruBlu process, J. Soc. Leather Technol. Chem. 82, 15-21, 1998.
54. Davis, M.H., and Scroggie, J.G. Investigation of commercial chrome tanning systems-Part IV, Recycling of chrome liquors and their use as a basis for pickling, J. Soc. Leather Technol. Chem. 57, 81-83, 1973.
55. Davis, M.H., and Scroggie, J.G. Theory and practice of direct chrome liquor recycling, Das Leder 31, 1-8, 1980.
56. Dederle, T., Rehak, P., Svoboda, V., and Ludvik, J. Koželuž ské operace v mokré dilně VI. Odvápň ování a mořeni, Kozarstvi 34, 45-50, 1984.
57. D'Souza, A., and Vedarajan, R. Pollution control in beamhouse operation, Proceedings of the 32nd LERIG, Chennai, 81-90, 1997.
58. Deep, A., Malik, P., Gupta, B., and Tandon, S.N. Efficient trivalent bath for the recovery of chromium, Plat. Surf. Finish. March, 76-77, 2001.
59. Deselinicu, V., Albu, L., Chiria, L., Bucevsehi, M.D., and Colt, M. New products for environmentally friendly leather finishing, Proceedings of XXIV IULTCS Congress, London, 323-327, 1997.
60. Dhar, S.C. Production and application of enzymes in the pretanning processes of leather manufacture, Leather Sci. 21, 39-47, 1974.
61. Dix, J.P. Chemical developments leading to cleaner production. Part 1: Beamhouse and chrome tanning operations, World Leather May, 42-45, 2000.
62. Fadel, A.A., and Speranza, M. The hair recovery liming system and its advantages, Leather Manuf. 113(9), 11-16, 1995.
63. FAO, World Statistical Compendium for Raw Hides and Skins, Leather and Leather Footwear 1982-2000, Food and Agriculture Organization of the United Nations, Rome, 2001.
64. Fathima, N.N., Rao, J.R., and Nair, B.U. Chromium(VI) formation: Thermal studies on chrome salt and chrome tanned hide powder, J. Am. Leather Chem. Assoc. 96, 444-449, 2001.
65. Fathima, N.N., Madhan, B., Rao, J.R., and Nair, B.U. Mixed metal tanning using chrome-zinc-silica: A new chrome-saver approach, J. Am. Leather Chem. Assoc. 98, 139-146, 2003.
66. Fathima, N.N., Saravanabhavan, S., Rao, J.R., and Nair, B.U. An eco-benign tanning system using aluminium, tannic acid and silica combination, J. Am. Leather Chem. Assoc. 99, 73-81, 2004.
67. Fava, A., Iliceto, A., and Camera, E. Kinetics of the thiol-disulfide exchange, J. Am. Chem. Soc. 79, 833-838, 1957.
68. Feigel, T. The hair-save liming process: A tool for environment friendly manufacture, World Leather 11(7), 31-32, 1998a.
69. Feigel, T. Use of enzymes in the beamhouse-Possibilities and limitations, World Leather May, 54-59, 1998b.
70. France, H.G. Recycle of tan liquor from organic acid pickle tan process, J. Am. Leather Chem. Assoc. 70, 206-219, 1975.
71. Frendrup, W. UNEP Cleaner Production Industrial Sector Guide Leather Production, Taastrup, 1996.
72. Gauglhofer, J. Environmental aspects of tanning with chromium, J. Soc. Leather Technol. Chem. 70, 11-13, 1986.
73. Gayatri, R., Rajaram, R., Nair, B.U., Chandrasekaran, F., and Ramasami, T. Chromium-induced molecular assemblies and long range ordering in collagenous tissues: A conceptual insight into chromium tanning, Proc. Indian Acad. Sci. 111, 133-145, 1999.
74. Germann, H.P. Chrome tannage from the viewpoint of ecology, J. Soc. Leather Technol. Chem. 79, 82-85, 1995.
75. Germann, H.P. The ecology of leather production-Present state and development trends, in Science and Technology for Leather Into the Next Millennium, Tata McGraw-Hill, New Delhi, p. 283, 1999.
76. Gill, CJ. Low VOC topcoats for the leather industry, J. Am. Leather Chem. Assoc. 86, 42-48, 1991.
77. Gill, C. Improving the performance of aqueous topcoats, J. Am. Leather Chem. Assoc. 88, 197-206, 1993.
78. Gill, C.J. Aromatic carbodiimides: A new class of cross linkers for aqueous leather coatings, Proceedings of the XXIIIIULTCS Congress, Germany, 1995.
79. Gish, A. Leather board, a practical use of tannery offal, J. Am. Leather Chem. Assoc. 95, 43-47, 2000.
80. Goddard, D.R., and Michaelis, L. A study on keratin, J. Biol. Chem. 106, 605-614, 1934.
81. Govindaraju, K., Ramasami, T., and Ramaswamy, D. Chromium(III)-insulin derivatives and their implication in glucose metabolism, J. Inorg. Biochem. 35, 137-147, 1989.
82. Green, G.H. Unhairing by means of enzymes, J. Soc. Leather Technol. Chem. 36, 127-134, 1952.
83. Greif, M. Environmental issues in leather finishing, J. Am. Leather Chem. Assoc. 85, 36-41, 1990.
84. Gupta, B., Deep, A., and Tandon, S.N. Recovery of chromium and nickel from industrial waste, Ind. Eng. Chem. Res. 41, 2948-2952, 2002.
85. Hanson, E.L. Volatile organic compound (VOC) emissions-Recycling requirements and control options, J. Am. Leather Chem. Assoc. 77, 35-37, 1982.
86. Hauber, C. Preservation of raw and wet blue hides and skins, in Unit 1. Background Information and Cleaner Technologies in Raw Material Preservation and in the Beamhouse Processes, UNIDO, pp. 206-239, 1998.
87. Hay, P.M. Safety and handling of dyes and pigments, J. Am. Leather Chem. Assoc. 74, 254-258, 1979.
88. Healy, J.B., Jr., and Young, L.Y. Catechol and phenol degradation by a methanogenic population of bacteria, Appl. Environ. Microbiol. 35, 216-218, 1978.
89. Heidemann, E., and Harenberg, O. Ein sehr schnelles, a bwasserarames Äscherverfahren, Das Leder 23, 85-96, 1972.
90. Heidemann, E., and Smidek, V.J. Entwicklung von Sulfidfreien und sulfidarmen Enthaarungen, Das Leder 38, 48-57, 1987.
91. Heidemann, E. Fundamentals of Leather Manufacturing, Eduard Roether KG, Darmstadt, 1993.
92. Herfeld, H., and Schubert, B. The influence of swelling and plumpness of animal hides in the liming process on the properties of leather, J. Am. Leather Chem. Assoc. 64, 198-226, 1969.
93. Herfeld, H., and Schubert, B. Untersuchungen über die quelling und prallheit tierischer haut in Säurelösungen, Das Leder 26, 117-128, 1975.
94. Herlihy, T.E., and Billings, W.H. An environmental assessment and feasibility study of using vegetable tannery biosolids as soil conditioners/plant growth supplement, J. Am. Leather Chem. Assoc. 91, 64-79, 1996.
95. Hetzel, L.V., Somerville, I.C., and Cares, C.J. The use of dimethylamine in hair-destroying processes, J. Am. Leather Chem. Assoc. 60, 364-379, 1965.
96. Hetzel, L.V., Somerville, I.C., and Cares, C.J. Further studies on dimethylamine in hair-destroying processes, J. Am. Leather Chem. Assoc. 61, 536-547, 1966.
97. Huber, C.F., and Satyendra, M.D. Toxicity of tannery effluent-The next concern, J. Am. Leather Chem. Assoc. 85, 276-285, 1990.
98. Huc, A. Collagen biomaterials. Characteristics and applications, J. Am. Leather Chem. Assoc. 80, 195-212, 1985.
99. ITC, Trade analysis system on personal computer 1994-1998 SITC3, International Trade Centre UNCTAD/WTO, United Nations Statistics Division, Geneva, 1999.
100. Jennette, K.W. Chromate metabolism in liver microsomes, Biol. Trace Elem. Res. 1, 55-62, 1979.
101. Jones, H.W., Cordon, T.C., and Windus, W. Light leather from enzyme unhaired hides, J. Am. Leather Chem. Assoc. 63, 480-485, 1968.
102. Kamal, A.M. S., Nomura, Y., Ishii, Y., and Shirai, K. Properties of bovine hair keratins solubilized with thioglycolate, J. Am. Leather Chem. Assoc. 93, 272-282, 1998.
103. Kanagaraj, J., Chandrababu, N.K., Sadulla, S., Rajkumar, O.S., Visalakshi, V., and Chandrakumar, N. A new approach to less-salt preservation of raw skin/hide, J. Am. Leather Chem. Assoc. 95, 368-374, 2000.
104. Kanthimathi, M., Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. A process for the preparation of a novel synthetic aluminium tanning agent, Indian Patent Application No. 88/DEL/2002, 2002.
105. Katz, S.A. The analytical biochemistry of chromium, Environ. Health Perspect. 92, 13-16, 1991.
106. Kaul, S.N., and Ravindranath, E. Waste treatment: Experience and outlook, International consultation meeting on technology and environmental upgradation in leather sector, New Delhi, 1999.
107. Khwaja, A.R., Singh, R., and Tandon, S.N. Recovery of Cr(III) from tannery spent chrome liquor for reuse, J. Environ. Eng. 126, 307-312, 2000a.
108. Khwaja, A.R., Singh, R., and Tandon, S.N. Mono(2-ethylhexyl) phosphoric acid as an extractant for Cr(III) and its application to industrial waste, Sep. Sci. Technol. 35, 447-455, 2000b.
109. Komanowsky, M., and Senske, G.E. Reduction of tannery waste volume through countercurrent reuse of process streams, J. Am. Leather Chem. Assoc. 77, 206-221, 1982.
110. Komanowsky, M. Microwave drying of hides under vaccum, J. Am. Leather Chem. Assoc. 95, 179-188, 2000.
111. Kumar, K.V., Sai, K.P., and Babu, M. Application of frog (Rana tigerina daudiri) skin collagen as a novel substrate in cell culture, J. Biomed. Mater. Res. 61, 197-202, 2002.
112. Lach, D., Knoll, I., and Fischer, K. Waterborne coatings based on different film forming polymers, J. Am. Leather Chem. Assoc. 83, 87-94, 1988.
113. Langerwerf, J.S.A. Philosophies on a sustainable leather world, in Science and Technology for Leather Into the Next Millennium, Tata McGraw-Hill, New Delhi, 389-409, 1999.
114. Langerwerf, J.S.A., and Chandrababu, N.K. Cleaner production: Options and directions, International consultation meeting on technology and environmental upgradation in leather sector, New Delhi, 1999.
115. Legesse, W., Thanikaivelan, P., Rao, J.R., and Nair, B.U. Underlying principles in chrome tanning: Part 1. Conceptual designing of pickle-less tanning, J. Am. Leather Chem. Assoc. 97, 475-486, 2002.
116. Leonard, A., and Lauwerys, R.R. Carcinogenicity and mutagenicity of chromium, Mutat. Res. 76, 227-239, 1980.
117. Löbig, W. Foam systems-A novel type of finishing technology, J. Soc. Leather Technol. Chem. 81, 1-4, 1997.
118. Luck, W. Chrome tanning processes with particularly good exhaustion, J. Am. Leather Chem. Assoc. 75, 378-388, 1980.
119. Ludvik, J., and Orlita, A. Vliv zpu̇sobu konzervace kužena odpadńi vody, Kozarstvi 36, 83-87, 1986.
120. Ludvik, J. Study on the scope for decrease of pollution load in leather processing, UNIDO Report, March, 1997.
121. Madhan, B., Rao, J.R., and Nair, B.U. Tanning salts based on mixed metal complexes of aluminium and zinc, J. Am. Leather Chem. Assoc. 96, 343-349, 2001a.
122. Madhan, B., Jeyakumar, R., Muralidharan, C., and Gnanasekaran, C.S. Improvements in vegetable tanning-Can acrylics be co-tanning agents, J. Am. Leather Chem. Assoc. 96, 120-126, 2001b.
123. Madhan, B., Fathima, N.N., Rao, J.R., and Nair, B.U. A new chromium-zinc tanning agent: A viable option for less chrome technology, J. Am. Leather Chem. Assoc. 97, 189-196, 2002.
124. Madhan, B., Sundararajan, A., Rao, J.R., and Nair, B.U. Studies on tanning with zirconium oxychloride: Part II, Development of a versatile tanning system, J. Am. Leather Chem. Assoc. 98, 107-114, 2003.
125. Mance, C. Lime splitting-A case study, J. Soc. Leather Technol. Chem. 84, 6-19, 2000.
126. Mannouch, S. A comparison of spray suns, World Leather 15(3), 49-53, 2002.
127. McCleskey, T.M., Foreman, T.M., Hallman, E.E., Burns, C.J., and Sauer, N.N. Approaching zero discharge in uranium processing: Photochemical reduction of uranyl, Environ. Sci. Technol. 35, 547-551, 2001.
128. Mertz, W. Chromium research from a distance: From 1959 to 1980, J. Am. Coll. Nutr. 17, 544-547, 1998.
129. Miller, A.T. Current and future uses of limed hide collagen in the food industry, J. Am. Leather Chem. Assoc. 91, 183-189, 1996.
130. Money, C.A., and Adminis, U. Recycling of lime-sulfide unhairing liquors I. Small-scale trials, J. Soc. Leather Technol. Chem. 58, 35-40, 1974.
131. Money, C.A., and Scroggie, J.G. Lysosomal hair loosening of hides, J. Soc. Leather Technol. Chem. 55, 333-343, 1971.
132. Money, C.A. Short term preservation of hides. II The use of zinc chloride or calcium hypochlorite as alternatives to sodium chlorite, J. Am. Leather Chem. Assoc. 69, 112-120, 1974.
133. Money, C.A. Unhairing and dewooling-Requirements for quality and the environment, J. Soc. Leather Technol. Chem. 80, 175-186, 1996.
134. Montgomery, K.C. Alternatives to chromium tanning-Part III: Effect of organic acid anions on aluminium sulfate tannage of collagen, J. Soc. Leather Technol. Chem. 71, 59-67, 1987.
135. Morera, J.M., Bartoli, E., Borras, M.D., and Marsal, A. Study on an unhairing process with hydrogen peroxide and amines, Proceedings of the XXTV IULTCS Congress, London, 436-440, 1997.
136. Münz, K.H., and Toifl, G. Entkalken mit Kohlendioxid (Teil 3), Das Leder 43, 41-46, 1992.
137. Munz, K.H., Sundar, V.J., Muralidharan, C., and Parthasarathi, K. Chrome tannage without pickling, Das Leder 48, 128-133, 1997.
138. Muralidharan, C., Sundar, V.J., and Rao, V.S.S. Two stage tanning-A new approach for chrome management, J. Am. Leather Chem. Assoc. 96, 61-66, 2001.
139. O'Flaherty, F., Roddy, W.T., and Lollar, R.M. Preparation for tannage, in The Chemistry and Technology of Leather, Vol. I, Krieger, Malabar, FL, 1978.
140. Okamura, H., and Shirai, K. Basic studies on the manufacture of leather board from chrome collagen fiber, J. Am. Leather Chem. Assoc. 67, 148-162, 1972.
141. Page, C.T., and Fennen, J. The challenge of manufacturing leather dyes today, J. Soc. Leather Technol. Chem. 82, 75-77, 1998.
142. Palon, P., and Marsal, A. Auxiliary agents with non-swelling capacity used in pickling/tanning processes. Part I, J. Soc. Leather Technol. Chem. 86, 139-142, 2002.
143. Parks, B.E. Fuel value of spent hemlock bark, J. Am. Leather Chem. Assoc. 11, 361-364, 1916.
144. Parthasarathy, K. Water management in tanneries, International conference on water management-Water 95, Madras, 1995.
145. Pauli, G. Zero emissions: The ultimate goal of cleaner production, J. Cleaner Prodn. 5, 109-113, 1997.
146. Pilawski, S., and Felicjaniak, B. Die einwirkung von pankreasenzymen auf schweinshaute im enthaarungsprozeß, Das Leder 27, 102-109, 1976.
147. Pojer, P.M., and Huynh, C.P. A salt free pickling regime for hides and skins, in Science and Technology for Leather Into the Next Millennium, Tata McGraw-Hill, New Delhi, 308-313, 1999.
148. Post, D. Die quellung von kalbsblobe im sauren Ph-gebiet unter mitwirkung verschiedener zusatze (Ein beitrag zur gesteuerten quellung im pickel), Das Leder 15, 69-77, 1964.
149. Prasad, B.G.S., and Nair, B.U. Recovery and recycling of regenerated chromium from spent chrome liquor, Indian. J. Environ. Health 36, 267-271, 1994.
150. Prasad, B.G.S., Chandrasekaran, B., Rao, J.R., Chandrababu, N.K., Kanthimathi, M., and Ramasami, T. Prospects for chromium management in tanneries: A critical review, Leather Sci. 34, 132-148, 1987.
151. Prasad, B.G.S., Rao, B.V.S.G., Madhavakrishna, W., and Sastry, C.A. Studies on the treatment of tannery wastewater-Part I Laboratory studies for setting up demonstration treatment unit, Leather Sci. 28, 221-229, 1981.
152. Prentiss, W.C., and Prasad, I.V. Improved chrome utilisation in chrome tanning, J. Am. Leather Chem. Assoc. 76, 395-403, 1981.
153. Pulles, F., and Domanjko, D. Reverse roll coating of splits and side leather, J. Am. Leather Chem. Assoc. 80, 280-283, 1985.
154. Pulles, F.A.F. The impact of aqueous polyurethanes on leather finishing technology, J. Am. Leather Chem. Assoc. 85, 234-241, 1990.
155. Püntener, A.G. Risk assessment of leather dyestuffs, J. Soc. Leather Technol. Chem. 82, 1-4, 1998.
156. 2 delimining-An environmentally friendly option for Indian tanneries, J. Soc. Leather Technol. Chem. 77, 183-187, 1993.
157. Puvanakrishnan, R., and Dhar, S.C. Recent advances in the enzymatic depilation of hides and skins, Leather Sci, 33, 177-191, 1986.
158. Rajagopalan, N., and Thimmapuram, P. Innovative technologies for a cleaner environment: Opportunities in the leather industry, Proceedings of the 32nd LERIG, Chennai, 62-85, 1997.
159. Rajamani, S., and Viswanathan, M. Desalting of hides and skins, in Unit 1. Background Information and Cleaner Technologies in Raw Material Preservation and in the Beamhouse Processes, UNIDO, 255-275, 1998.
160. Rajamani, S. Feasible options for handling dissolved solids problems in tanneries, Proceedings of the 32nd LERIG, Chennai, 14-20, 1997.
161. Rajamani, S., Suthanthararajan, R., Ravindranath, E., Mulder, A., van Groenestijn, J.W., and Langerwerf, J.S.A. Treatment of tannery wastewater using upflow anaerobic sludge blanket system (UASB), Proceedings of the 30th LERIG, Chennai, 57-66, 1995.
162. Rajaram, R., Nair, B.U., and Ramasami, T. Chromium(III) induced abnormalities in human lymphocyte cell proliferation: Evidence for apoptosis, Biochem. Biophys. Res. Commun. 210, 434-440, 1995.
163. Ramamurthy, G., Sehgal, P.K., and Kumar, M. Improved uptake of basic chromium salts in tanning operations using keratin hydrolysates, J. Soc. Leather Technol. Chem. 73, 108-171, 1989.
164. Ramasami, T., and Prasad, B.G.S. Environmental aspects of leather processing, Proceedings of the LEXPO XV, Calcutta, 43-71, 1991.
165. Ramasami, T., and Sahasranaman, A. Biomethanation of fleshings and sludge from tannery and effluent treatment plants, World Leather 13(7), 38, 2000.
166. Ramasami, T. Approach towards a unified theory for tanning: Wilsons dream, J. Am. Leather Chem. Assoc. 96, 290-304, 2001.
167. Ramasami, T. Biological Nitrogen Fixation, Popular lecture sponsored by DBT delivered at CLRI, Madras, 1993.
168. Ramasami, T. Greening of chrome tanning in Indian leather industry, ILIFO J. Cleaner Tanning, 1(2), 12-14, 1996.
169. Ramasami, T., Rajamani, S., and Rao, J.R. Pollution control in leather industry: Emerging technological options, International symposium on surface and colloid science and its relevance to soil pollution, Madras, 1994.
170. Ramasami, T., Rao, J.R., Chandrababu, N.K., Parthasarathi, K., Rao, P.G., Saravanan, P., Gayatri, R., and Sreeram, K.J. Beamhouse and tanning operations: Process chemistry revisited, J. Soc. Leather Technol. Chem. 83, 39-45, 1999a.
171. Ramasami, T., Sreeram, K.J., and Gayatri, R. Sources of pollution in tanneries, mitigation and case studies, in Unit 1. Legal Requirements, Manual on Design, Operation and Maintenance of Tannery Effluent Treatment Plants, RePO-UNIDO, Chennai, 20-33, 1999b.
172. Ramasami, T., Rao, J.R., Chandrasekaran, B., and Chandrababu, N.K. Leather chemicals: Emerging trends, Leather Age August, 23-30, 1999c.
173. Ramasami, T., Sreeram, K.J., and Gayatri, R. Emerging leather processing strategies for waste minimisation, in Unit 1. Background Information and Cleaner Technologies in Raw Material Preservation and in the Beamhouse Processes, UNIDO, 183-197, 1998.
174. Ranganathan, T.S., and Reed, R. Studies on zirconium tannage, J. Soc. Leather Technol. Chem. 42, 351-360, 1958.
175. Rao, J.R. Recovery and reuse techniques for chromium salts in tanneries, Leather Sci. 34, 201-212, 1987.
176. Rao, J.R. Studies on the approaches to the better management of chromium (III) salts as tanning agents, PhD thesis, Anna University, Chennai, 1991.
177. Rao, J.R., and Ramasami, T. Waste management in leather processing: A case of chromium, International Conference on Industrial Pollution and Control Technologies (ICIPACT-97), Hyderabad, 1997.
178. Rao, J.R., Chandrasekaran, B., and Ramasami, T. High exhaust chrome tanning systems, Proceedings of the 27th LERIG, Madras, 75-101, 1992.
179. Rao, J.R., Venba, R., Nair, B.U. Suthanthararajan, R., Rajamani, S., Ramasami, T., and Langerwerf, J.S.A. Chromium reuse, Proceedings of the 30th LERIG, Chennai, 37-56, 1995.
180. Rao, J.R., Chandrasekaran, B., Subramaniam, V., Nair, B.U., and Ramasami, T. Physico-chemical and structural studies on leathers tanned using high exhaust basic chromium sulfate salt, J. Am. Leather Chem. Assoc. 93, 139-147, 1998.
181. Rao, J.R., Nair, B.U., and Ramasami, T. Isolation and characterization of low affinity chromium(III) complex in chrome tanning solutions. J. Soc. Leather Technol. Chem. 81, 234-238, 1997.
182. Rao, J.R., Prasad, B.G.S., Narasimhan, V., Ramasami, T., Shah, P.R., and Khan, A.A. Electrodialysis in the recovery and reuse of chromium in industrial effluents, J. Membrane Sci. 46, 215-224, 1989.
183. Rao, J.R., Sreeram, K.J., Nair, B.U., and Ramasami, T. Some strategies towards mitigation of pollution from tanneries: A review, in Advances in Wastewater Treatment Technologies, Goel, PK., ed., Technoscience Publications, Jaipur, 135-152, 1999.
184. Rao, J.R., Ramasami, T., Sahasranaman, A., Hashim, M.M., and Ahmed, M.R. Doecology solutions for leather sector: Technology initiatives, Regional IULTCS Conference of South and South East Asian Countries on Leather and Allied Technologies, Kolkata, 2001.
185. Rao, J.R., Thanikaivelan, P., Sreeram, K.J., and Nair, B.U. Green route for the disposal of chrome shavings (chromium containing solid waste) in tanning industry, Environ. Sci. Technol. 36, 1372-1376, 2002a.
186. Rao, J.R., Thanikaivelan, P., Malathi, J., Rajaram, R., and Nair, B.U. Development of natural colors in Cr-Fe tanned garment leathers, J. Soc. Leather Technol. Chem. 86, 106-111, 2002b.
187. Rao, J.R., Chandrasekaran, B., Nair, B.U., and Ramasami, T. Eco-benign management options for cleaner chrome tanning, J. Sci. Ind. Res. 61, 912-926, 2002c.
188. Rao, J.R., Chandrababu, N.K., Muralidharan, C., Nair, B.U., Rao, P.G., and Ramasami, T. Recouping the wastewater: A way forward for cleaner leather processing, J. Clean. Prod. 11, 591-599, 2003.
189. Rao, J.R., Thanikaivelan, P., Sreeram, K.J., and Nair, B.U. Tanning studies with basic chromium sulfate prepared using chrome shavings as a reductant: A call for "wealth from waste" approach to the tanning industry, J. Am. Leather Chem. Assoc. 99, 170-176, 2004.
190. Rohm, O. Verfahren zum Beizen von Häuten, German Patent DE 200,519, July 21, 1910.
191. Rose, C. Ranganayaki, M.D., Srinivasan, T.S., Ramakrishnan, S., Seethalaksmi, S., and Sastry, T.P. A process for the preparation of a parchment like material, Indian Patent Application No. 300/DEL/2001, 2001.
192. Rosenbusch, K. Neuere erfahrungen bei der oxydativ enthaarung, Das Leder 16, 237-248, 1965.
193. Sahasranaman, A., and Buljan, J. Environmental management in Indian tanneries, Proceedings of the 34th LERIG, Chennai, 34-44, 2000.
194. Sai, K.P., Reddy, P.N., and Babu, M. Investigations on wound healing by using amphibian skin, Indian J. Exp. Biol. 33, 673-676, 1995.
195. Saravanabhavan, S., Aravindhan, R., Thanikaivelan, P., Rao, J.R., and Nair, B.U. Green solution for tannery pollution: Effect of enzyme based lime-free unhairing and fibre opening in combination with pickle-free chrome tanning, Green Chem. 5, 707-714, 2003a.
196. Saravanabhavan, S., Aravindhan, R., Thanikaivelan, P., Rao, J.R., Chandrasekaran, B., and Nair, B.U. An integrated eco-friendly tanning method for the manufacture of upper leathers from goatskins, J. Soc. Leather Technol. Chem. 87, 149-158, 2003b.
197. Saravanabhavan, S., Thanikaivelan, P., Rao, J.R., and Nair, B.U. Studies on the development of pickle-less vegetable tanning, J. Am. Leather Chem. Assoc. 99, 281-288, 2004a.
198. Saravanabhavan, S., Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Natural leathers from natural materials: Progressing toward a new arena in leather processing, Environ. Sci. Technol. 38, 871-879, 2004b.
199. Scheijgrond, J.W. A legal perspective on sludge, World Leather 11(7), 22-27, 1998.
200. Schlosser, L., Keller, W., Hein, A., and Heidemann, E. The utilisation of a Lactobacillus culture in the beamhouse, J. Soc. Leather Technol. Chem. 70, 163-168, 1986.
201. Sehgal, P.K., Ramamurthy, G., Muralidharan, C., and Gupta, K.B. Unhairing of goat skins by an alternative non-enzymatic and sulfide free process, J. Soc. Leather Technol. Chem. 80, 91-92, 1996.
202. Sekaran, G., Jayanthi, S., Shanmugasundaram, K.A., Mariappan, M., and Ramasami, T. An integrated biological and chemical oxidative system for treatment of tannery effluent: A review, in Advances in Wastewater Treatment Technologies, Goel, PK., ed., Technoscience Publications, Jaipur, India, 153-163, 1999.
203. Selvarangan, R., and Nayudamma, Y. Alum tannages: Part II, Tanning action of basic aluminium sulphate, Leather Sci. 11, 431-439, 1964.
204. Selvarangan, R., and Shanmugasundaram, K. Saltless curing and preservation of hides and skins, Leather Sci. 31, 241, 1984.
205. Sharphouse, J.H. Leather Technicians Handbook, Vernon Lock Ltd., London, 1983.
206. Shrewsbury, C. Biotechnology for improved product quality, World Leather February, 40-42, 2002.
207. Shrivastava, H.Y., and Nair, B.U. Cleavage of human orosomucoid by a chromium(V) species: Relevance in biotoxicity of chromium, Biochem. Biophys. Res. Commun. 279, 980-983, 2000.
208. Shrivastava, H.Y., and Nair, B.U. Chromium(III) mediated structural modification of glycoprotein: Impact of the ligand and the oxidants, Biochem. Biophys. Res. Commun. 285, 915-920, 2001.
209. Shuttleworth, S.G. The theory of chrome tanning, J. Soc. Leather Technol. Chem. 34, 410-437, 1950.
210. Simoncini, A., and Sammarco, U. The possibility of reducing the CODs deriving from the fatliquoring of the softy leathers in residual baths, Proceedings of the XXIII IULTCS Congress, Germany, 1995.
211. Somerville, I.C., Hetzel, L.V., Fisher, R.F.M., Wendkos, J., and Cares, C.J. Rapid unhairing with dimethylamine, J. Am. Leather Chem. Assoc. 58, 254-268, 1963.
212. Sreeram, K.J., Rao, J.R., Venba, R., Nair, B.U., and Ramasami, T. Factors in gravitational settling of chromic hydroxide in aqueous media, J. Soc. Leather Technol. Chem. 83, 111-114, 1999.
213. Sreeram, K.J., Rao, J.R., Sundaram, R., Nair, B.U., and Ramasami, T. Development of semi-continuous method for chrome recovery from waste waters, Green Chem. 2, 37-41, 2000a.
214. Sreeram, K.J., Kanthimathi, M., Rao, J.R., Sundaram, R., Nair, B.U., and Ramasami, T. Development of an organo-zirconium complex-Organozir as possible alternative to chromium, J. Am. Leather Chem. Assoc. 95, 359-367, 2000b.
215. Stephens, L.J. The effect of preservation by freezing on the strength of Kangaroo leathers, J. Am. Leather Chem. Assoc. 82, 45-49, 1987.
216. Steven, W. Treatment of beamhouse and fellmongering waste waters, J. Soc. Leather Technol. Chem. 67, 127-131, 1983.
217. Stockman, G. Determination of spray machine transfer efficiency for leather finishing, J. Am. Leather Chem. Assoc. 83, 125-128, 1988.
218. Streicher, V.R. Entkälkung mit ammoniumsalzfreien Entkälkungsmitteln, Leder Hautemarkt 39(14), 7-12, 1987.
219. Sundar, V.J., and Muralidharan, C. Cleaner tanning technologies, J. Indian Leather Technol. Assoc. 49, 110-137, 1999.
220. Sundar, V.J., Rao, J.R., and Muralidharan, C. Cleaner chrome tanning-Emerging options, J. Clean. Prod., 10, 69-74, 2002.
221. Sundararajan, A., Madhan, B., Rao, J.R., and Nair, B.U. Studies on tanning with zirconium oxychloride: Part I Standardization of tanning process, J. Am. Leather Chem. Assoc. 98, 101-106, 2003.
222. Suresh, V., Kanthimathi, M., Thanikaivelan, P., Rao, J.R., and Nair, B.U. An improved product-processs for cleaner chrome tanning in leather processing, J. Clean. Prod. 9, 483-491, 2001.
223. Swarna, V.K., Jeevan, R.G., Chandrababu, N.K., Sadulla, S., Rao, V.S.S., and Ramasami, T. Formaldehyde free leather, in Science and Technology for Leather Into the Next Millennium, Tata McGraw-Hill, New Delhi, 322-328, 1999.
224. Sykes, R. Environmental management, Leather June, 17-22, 1996.
225. Sykes, R. Zero emissions-Pattern for the future? Leather No. 2, 35-38, 1997a.
226. Sykes, G. Leather board manufacture, World Leather 10(7), 60-61, 1997b.
227. Taeger, T. Progress in leather chemistry: What kind of milestones are to be expected? An excursion four years before the millenium, J. Am. Leather Chem. Assoc. 91, 211-224, 1996.
228. Takenouchi, K., Kondo, K., and Nakamura, F. Composition of complexes in citrate masked aluminium solutions and their affinity for collagen, Proceedings of the Centenary IULTCS Congress, London, 500-510, 1997.
229. Taqui-Khan, M.M. Approach towards low waste chrome tanning. In Trends in Mineral Tanning and Resource Potential, Ramasami, T., and Thyagarajan, G., Eds., CLRI COSTED, Chennai, 115-128, 1987.
230. Täte, I.P. The use of aluminium, titanium and magnesium complexes in pretanning, tanning and retanning operations, Proceedings of the XX IULTCS Congress, Philadelphia, 1989.
231. Taylor, M.M., Bailey, D.G., and Feairheller, S.H. A review of the uses of enzymes in the tannery, J. Am. Leather Chem. Assoc. 82, 153-164, 1987.
232. Taylor, M.M., Cabeza, L.F., DiMaio, G., Brown, E.M., Manner, W.N., Carrio, R., Celma, P.J., and Cot, J. Processing of leather waste: Pilot scale studies on chrome shavings. Part I. Purification of chrome cake and tanning trials, J. Am. Leather Chem. Assoc. 93, 83-98, 1998.
233. Taylor, M.M., Diefendorf, E.J., Thompson, C.J., Brown, E.M., Marmer, W.N., and Cabeza, L.F. Extraction of value added byproducts from treatment of chromium containing collagenous leather industry wastes, J. Am. Leather Chem. Assoc. 81, 5-13, 1997.
234. Technology plan for environmental sustainability of the tanning sector in Tamilnadu, Status report submitted to AISHTMA by CLRI, Chennai, 1997.
235. Thanikaivelan, P., Geeta, V., Rao, J.R., Sreeram, K.J., and Nair, B.U. A novel chomium-iron tanning agent: Cross fertilization in solo tannage, J. Soc. Leather Technol. Chem. 84, 82-87, 2000a.
236. Thanikaivelan, P., Rao, J.R., Kanthimathi, M., Nair, B.U., and Ramasami, T. An improved process for the preparation of a tanning agent, Indian Patent Application No. 770/DEL/2000, 200Ob.
237. Thanikaivelan, P., Rao, J.R., and Nair, B.U. Development of a leather processing method in narrow pH profile. Part 1. Standardisation of unhairing process, J. Soc. Leather Technol. Chem. 84, 276-284, 2000c.
238. Thanikaivelan, P., Rao, J.R., and Nair, B.U. Development of a leather processing method in narrow pH profile. Part 2. Standardisation of tanning process, J. Soc. Leather Technol. Chem. 85, 106-115, 2001a.
239. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Approach towards zero discharge tanning: Exploration of NaOH based opening up method, J. Am. Leather Chem. Assoc. 96, 222-233, 2001b.
240. Thanikaivelan, P., Kanthimathi, M., Rao, J.R., and Nair, B.U. A novel formaldehyde-free synthetic chrome tanning agent for pickle-less chrome tanning: Comparative study on syntan versus modified basic chromium sulfate, J. Am. Leather Chem. Assoc. 97, 127-136, 2002a.
241. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Zero discharge tanning: A shift from chemical to biocatalytic leather processing, Environ. Sci. Technol. 36, 4187-4194, 2002b.
242. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Approach towards zero discharge tanning: Role of concentration on the development of eco-friendly liming-reliming processes, J. Clean. Prod. 11, 79-90, 2003a.
243. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Biointervention makes leather processing greener: An integrated cleansing and tanning system, Environ. Sci. Technol. 37, 2609-2617, 2003b.
244. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Underlying principles in chrome tanning: Part 2. Underpinning mechanism in pickle-less tanning, J. Am. Leather Chem. Assoc. 99, 82-94, 2004a.
245. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Ecofriendly bio-process for leather processing, US Patent 6, 708,531, 2004b.
246. Thanikaivelan, P., Rao, J.R., Nair, B.U., and Ramasami, T. Progress and recent trends in biotechnological methods in leather processing, Trends Biotechnol. 22, 181-188, 2004c.
247. Tsou, T.C., Lin, R.J., and Yang, J.L. Mutational spectrum induced by chromium(III)n shuttle vectors replicated in human cells: Relationship to Cr(III)-DNA interactions, Chem. Res. Toxicol. 10, 962-970, 1997.
248. Turner, P. The effect of environmental legislation on the selection of dyestuffs, J. Soc. Leather Technol. Chem. 78, 8-11, 1994.
249. Uehara, K., Matsunaga, A., Arai, K., Toyoda, H., and Chonan, Y. Solubilization of cattle and pig hair keratins by reduction with sodium thioglycolate or oxidation with performic acid, J. Am. Leather Chem. Assoc. 81, 331-337, 1986.
250. Valeika, V., Balčiunieṅ, J., Beleska, K., Skrodenis, A., and Valeikienè, V. Use of NaOH for unhairing hides and the influence of salts on the hide properties, J. Soc. Leather Technol. Chem. 81, 65-69, 1997.
251. Valeika, V., Balciuniene, J., Beleska, K., Skrodenis, A., and Valeikienè, V. Lime free unhairing: Part 2, Influence of added salts on NaOH unhairing and on hide properties, J. Soc. Leather Technol. Chem. 82, 95-98, 1998.
252. van Groenestijn, J.W., Mariappan, M., Sekaran, G., and Rajamani, S. Evaluation of performance of lagooning systems for tannery effluent treatment in South India, Proceedings of the 30th LERIG, Chennai, 10-22, 1995.
253. Velappan, K. C., and Muralidharan, C. Integrated investment requirements for the leather sector, Proceedings of the 35th LERIG, Chennai, 15-46, 2001.
254. Venba, R., Ramesh, R., Rao, P.S., Babu, M.S., Chandrababu, N.K., and Parthasarathy, K., Pickleless high exhaust chrome tanning process, Proceedings of the 30th LERIG, Chennai, 1995.
255. Venba, R., Malathy, J., and Chandrababu, N.K. Studies on the effect of recovered chrome on dyeing of leathers, in Science and Technology for Leather into the Next Millennium, Tata McGraw-Hill, New Delhi, 446-452, 1999.
256. Venier, P., Montaldi, A., Majone, F., Bianchi, V., and Levis, A.G. Cytotoxic, mutagenic and clastogenic effects of industrial chromium compounds, Carcinogenesis 3, 1331-1338, 1982.
257. Venkatachalapathi, K., Nair, M.S., Ramaswamy, D., and Santappa, M. Binary and ternary complexes of chromium(III) involving irninodiacetic acid, L(+)-aspartic acid, L(+)-glutamic acid, or L(+)-cysteine as ligands, J. Chem. Soc. (Dalton Trans.) 291-297, 1982.
258. Vijayalakshmi, R., Kanthimathi, M., Subramanian, V., and Nair, B.U. DNA cleavage by a chromium(III) complex, Biochem. Biophys. Res. Commun. 271, 731-734, 2000.
259. Voitkun, V., Zhitkovich, A., and Costa, M. Cr(III)-mediated crosslinks of glutathione or amino acids to the DNA phosphate backbone are mutagenic in human cells, Nucleic Acids Res. 26, 2024-2030, 1998.
260. von Vlimmeren, P.J. New beamhouse development to simplify tannery wastewater management, J. Am. Leather Chem. Ass. 71, 318-335, 1976.
261. Walther, W. All aqueous finishing systems for leather, problems and solutions, V. Am. Leather Chem. Assoc. 83, 74-83, 1988.
262. Warrier, K.G.K., Nair, K.M., Damodaran, A.D., de Vries, A.H., van der Zwan, J., Prasad, B.G.S., Nair, B.U., Venba, R., Mahadevan, T.S.K., and Ramasarni, T. Safe utilisation of chrome containing sludges in brick making, Proceedings of the XXIII IULTCS Congress, Germany, 1995a.
263. Warrier, K.G.K., Nair, K.M., Perumal, P., Mukundan, P., Damodaran, A.D., de Vries, A.H., van Der Zwan, J., Ramasarni, T., and Prasad, E.G.S. Effective disposal of tannery sludge as admixture to building bricks, Proceedings of the 30th LERIG, Chennai, 84-95, 1995b.
264. Wedrychowski, A., Ward, W.S., Schmidt, W.N., and Hnilica, L.S. Chromium induced cross linking of nuclear proteins and DNA, J. Biol. Chem. 260, 7150-7155, 1985.
265. Wenzel, W. Aqueous finishing of leather-Products, processes and problems, J. Am. Leather Chem. Assoc. 86, 442-456, 1991.
266. Will, H. The latest experiences in leather finishing by roll coating and printing, J. Am. Leather Chem. Assoc. 80, 293-299, 1985.
267. Windus, W., and Showell, J.S. An interpretation of the mechanism of unhairing as a nucleophilic displacement, J. Am. Leather Chem. Assoc. 63, 258-274, 1968.
268. Wu-Sheng, W., Jun, Z., De-Li, R., Feng, Z., and Cai-Yuan, P. Expoxysilane: A new crosslinker for waterborne polyurethane finishes, J. Soc. Leather Technol. Chem. 84, 45-47, 2000.
269. Zhitkovich, A., Voitkum, V., and Costa, M. Glutathione and free amino acids form stable complexes with DNA following exposure intact mammalian cells to chromate, Carcinogenesis 16, 907-913, 1995.
270. Zhitkovich, A., Shranger, S., and Messer, J. Reductive metabolism of Cr(VI) by cysteine leads to the formation of binary and ternary Cr-DNA adducts in the absence of oxidative DNA damage, Chem. Res. Toxicol. 13, 1114-1124, 2000.