Supercritical extraction of contaminants from soils and sediments

Journal of Supercritical Fluids

Volumn 38, Issue 2, 2006, Pages 167-180

  Anitescu, G ^a   Tavlarides, L L ^a  

^a Syracuse University   (United States)

Author keywords

Contaminated soils and sediments; Decontamination technologies; Environmental chemistry; Organic contaminants; Supercritical extraction (SCE)

Indexed keywords

CARBON DIOXIDE; IMPURITIES; POLYCYCLIC AROMATIC HYDROCARBONS; SEDIMENTS; SOILS; SUPERCRITICAL FLUIDS; VOLATILE ORGANIC COMPOUNDS;

CONTAMINATED SOILS AND SEDIMENTS; DECONTAMINATION TECHNOLOGIES; ENVIRONMENTAL CHEMISTRY; ORGANIC CONTAMINANTS; SUPERCRITICAL EXTRACTION (SCE);

EXTRACTION;

EID: 33748959394     PISSN: 08968446     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.supflu.2006.03.024     Document Type: Article

References (114)

1. Akgerman A., Roop R.K., Hess R.K., and Yeo S.-D. Supercritical extraction in environmental control. In: Bruno T.J., and Ely J.F. (Eds). Supercritical Fluid Technology. Reviews in Modern Theory and Applications (1991), CRC Press, Boca Raton, FL 479-509
2. Akgerman A. Supercritical extraction in environmental remediation and restoration. In: Sawyer D.T., and Martell A.E. (Eds). Ind. Environ. Chem. [Proceedings of the Texas A&M University, IUCCP 10th Annual Symposium] (1992), Plenum, New York 153-169
3. Akgerman A. Environmental update. Environ. Prog. 18 (1999) S4-S5
4. Akgerman A. Supercritical fluids in environmental remediation and pollution prevention. ACS Symp. Ser. 670 (1997) 208-231 (Supercritical Fluids)
5. Akgerman A., and Madras G. Fundamentals of solids extraction by supercritical fluids. NATO ASI Ser. E: Appl. Sci. 273 (1994) 669-695 (Supercritical Fluids)
6. Akgerman A. Supercritical fluid extraction of contaminants from environmental matrices. Waste Manage. (Amsterdam, Netherlands) 13 (1993) 403-415
7. Cross W., and Akgerman A. Single-component and mixture solubilities of hexachlorobenzene and pentachlorophenol in supercritical carbon dioxide. Ind. Eng. Chem. Res. 37 (1998) 1510-1518
8. Madras G., Erkey C., and Akgerman A. A new technique for measuring solubilities of organics in supercritical fluids. J. Chem. Eng. Data 38 (1993) 422-423
9. Akgerman A., Erkey C., and Ghoreishi S.M. Supercritical extraction of hexachlorobenzene from soil. Ind. Eng. Chem. Res. 31 (1992) 333-339
10. Erkey C., Madras G., Orejuela M., and Akgerman A. Supercritical carbon dioxide extraction of organics from soils. Environ. Sci. Technol. 27 (1993) 1225-1231
11. Madras G., Thibaud C., Erkey C., and Akgerman A. Modeling of supercritical extraction of organics from solid matrixes. AIChE J. 40 (1994) 777-785
12. Akgerman A., and Yeo S.D. Supercritical extraction of organic components from aqueous slurries. ACS Symp. Ser. 514 (1993) 294-304 (Supercritical Fluid Engineering Science)
13. Madras G., Erkey C., and Akgerman A. Supercritical extraction of organic contaminants from soil combined with adsorption onto activated carbon. Environ. Prog. 13 (1994) 45-50
14. Akgerman A., and Carter B.D. Equilibrium partitioning of 2,4-dichlorophenol between water and near-critical and supercritical carbon dioxide. J. Chem. Eng. Data 39 (1994) 510-512
15. 2 extraction of soil-water slurries. J. Supercrit. Fluids 9 (1996) 177-184
16. Madras G., Erkey C., and Akgerman A. Supercritical fluid regeneration of activated carbon loaded with heavy molecular weight organics. Ind. Eng. Chem. Res. 32 (1993) 1163-1168
17. Hess R.K., and Akgerman A. Supercritical extraction of phenol from soil. J. Supercrit. Fluids 4 (1991) 47-52
18. Thibaud-Erkey C., Guo Y., Erkey C., and Akgerman A. Mathematical modeling of adsorption and desorption of volatile contaminants from soil: influence of isotherm shape on adsorption and desorption profiles. Environ. Sci. Technol. 30 (1996) 2127-2134
19. Roop R.K., Hess R.K., and Akgerman A. Supercritical extraction of pollutants from water and soil. ACS Symp. Ser. 406 (1989) 468-476 (Supercritical Fluid Science Technology)
20. Yeo S.-D., Tuncer E., and Akgerman A. Adsorption of volatile organic compounds on soil and prediction of desorption breakthroughs. Separ. Sci. Technol. 32 (1997) 2497-2512
21. Guo Y., Thibaud-Erkey C., and Akgerman A. Gas-phase adsorption and desorption of single-component and binary mixtures of volatile organic contaminants on soil. Environ. Eng. Sci. 15 (1998) 203-213
22. Ghoreishi S.M., and Akgerman A. Dispersion coefficients of supercritical fluid in fixed beds. Int. J. Eng. 13 (2000) 1-14
23. McHugh M.A., and Krukonis V.J. Supercritical Fluid Extraction: Principles and Practice. 2nd ed. (1994), Butterworths-Heinemann, Boston, MA
24. In: Bruno T.J., and Ely J.F. (Eds). Supercritical Fluid Technology. Reviews in Modern Theory and Applications (1991), CRC Press, Boca Raton, FL
25. In: Charpentier B.A., and Sevenants M.R. (Eds). Supercritical Fluid Extraction and Chromatography. Techniques and Applications; ACS Symposium Series vol. 366 (1988), ACS, Washington, DC
26. In: Johnston K.P., and Penninger J.M.L. (Eds). Supercritical Fluid Science and Technology. ACS Symposium Series vol. 406 (1989), ACS, Washington, DC
27. Smith R.M., and Hawthorne S.B. Supercritical Fluids in Chromatography and Extraction (1997), Elsevier, Oxford, UK
28. Saldana M.D.A., Nagpal V., and Guigard S.E. Remediation of contaminated soils using supercritical fluid extraction: a review (1994-2004). Environ. Technol. 26 (2005) 1013-1032
29. Camel V. Recent extraction techniques for solid matrices-supercritical fluid extraction, pressurized fluid extraction and microwave-assisted extraction: their potential and pitfalls. Analyst 126 (2001) 1182-1193
30. Bjorklund E., Nilsson T., Bowadt S., Pilorz K., Mathiasson L., and Hawthorne S.B. Introducing selective supercritical fluid extraction as a new tool for determining sorption/desorption behavior and bioavailability of persistent organic pollutants in sediment. J. Biochem. Biophys. Methods 43 (2000) 295-311
31. Hawthorne S.B., and King J.W. Principles and Practice of Analytical SFE, Chromatography: Principles and Practice. II. Practical Supercritical Fluid Chromatography and Extraction (1999), Harwood Academic Publishers pp. 219-282
32. Bowadt S., and Hawthorne S.B. Supercritical fluid extraction in environmental analysis. J. Chromatogr. A 703 (1995) 549-571
33. Ayen R.J., and Navratil J.D. Solvent extraction of hazardous contaminants from sludges and soils in the USA. Proceedings of 5th International Symposium and Exhibition on Environmental Contamination in Central and Eastern Europe. Prague, Czech Republic, September 12-14, 2000, meeting date 2000 (2001), Institute for International Cooperative Environmental Research, Florida State University, Tallahassee, FL 1044-1050
34. Colmsjo A. Concentration and extraction of PAHS from environmental samples. In: Neilson A.H. (Ed). Handbook of Environmental Chemistry vol. 3(Pt. I) (1998) 55-76
35. Camel V. Supercritical fluid extraction as a useful method for pesticide determination. Analysis 26 (1998) M99-M111
36. Anitescu G., and Tavlarides L.L. Solubilities of solids in supercritical fluids. I. New quasi-static experimental method for polycyclic aromatic hydrocarbons (PAHs) + pure fluids. J. Supercrit. Fluids 10 (1997) 175-189
37. 2/cosolvent. J. Supercrit. Fluids 11 (1997) 37-51
38. 10. J. Supercrit. Fluids 14 (1999) 197-211
39. Zhou W., Anitescu G., and Tavlarides L.L. PCB partition equilibrium between St. Lawrence River sediments and supercritical fluids. J. Supercrit. Fluids 29 (2004) 31-42
40. Zhou W., Anitescu G., and Tavlarides L.L. Desorption of PCBs from contaminated St. Lawrence River sediments with supercritical fluids. Ind. Eng. Chem. Res. 43 (2004) 397-404
41. Zhou W., Anitescu G., Rice P.E., and Tavlarides L.L. Supercritical fluid extraction-oxidation technology to remediate PCB contaminated sediments: an economic analysis. Environ. Prog. 23 (2004) 222-231
42. W. Zhou, L.L. Tavlarides, Supercritical fluid extraction of PCBs from real-world St. Lawrence River sediments, Proceedings of ISEC '99, in: M. Cox, M. Hidalgo, M. Valiente (Eds.), Solvent Extraction for the 21st Century, Barcelona, Spain, July 11-16, 1999 (2001), Society of Chemical Industry, London, UK, pp. 1651-1656.
43. W. Zhou, G. Anitescu, L.L. Tavlarides, Supercritical fluid extraction-oxidation technology to remediate PCB contaminated soil/sediments, International Solvent Extraction Conference, Cape Town, South Africa, March 17-21, 2002, South African Institute of Mining and Metallurgy, Marshalltown, South Africa, pp. 809-815.
44. L.L. Tavlarides, W. Zhou, G. Anitescu, Supercritical fluid technology for remediation of PCB/PAH-contaminated soil/sediments, Proceedings of the Conference on Hazardous Waste Research: Environmental Challenges and Solutions to Resource Development, Production, and Use, Denver, CO, United States, May 23-25, 2000, Great Plains/Rocky Mountain Hazardous Substance Research Center, Kansas State University, Manhattan, KS, pp. 239-255.
45. Chen P., Zhou W., and Tavlarides L.L. Remediation of polychlorinated biphenyl contaminated soil/sediments by supercritical fluid extraction. Environ. Prog. 16 (1997) 227-236
46. Tsekhanskaya Y. Russ. J. Phys. Chem. 38 (1964) 1173
47. Sherman G., Shenoy S., Weiss R.A., and Erkey C. A static method coupled with gravimetric analysis for the determination of solubilities of solids in supercritical carbon dioxide. Ind. Eng. Chem. Res. 39 (2000) 846-848
48. 2 by on-line flame ionization detection. Anal. Chem. 67 (1995) 273-279
49. Miller D.J., Hawthorne S.B., Clifford A.A., and Zhu S. Solubility of polycyclic aromatic hydrocarbons in supercritical carbon dioxide from 313 K to 523 K and pressures from 100 bar to 450 bar. J. Chem. Eng. Data 41 (1996) 779-786
50. Abaroudi K., Trabelsi F., and Recasens F. Quasi-static measurement of equilibrium solubilities in SC fluids: a mass transfer criterion. Fluid Phase Equilibr. 169 (2000) 177-189
51. Knox D.E. Solubilities in supercritical fluids. Pure Appl. Chem. 77 3 (2005) 513-530
52. Guigard S.E., and Stiver W.H. A density-dependent solute solubility parameter for correlating solubilities in supercritical fluids. Ind. Eng. Chem. Res. 37 (1998) 3786-3792
53. Christov M., and Dohrn R. High-pressure fluid phase equilibria; experimental methods and systems investigated (1994-1999). Fluid Phase Equilibr. 202 (2002) 153-218
54. Ruckenstein E., and Shulgin I. The solubility of solids in mixtures composed of a supercritical fluid and an entrainer. Fluid Phase Equilibr. 200 (2002) 53-67
55. Brudi K., Dahmen N., and Schmieder H. Partition coefficients of organic substances in two-phase mixtures of water and carbon dioxide at pressures of 8 to 30 MPa and temperatures of 313 to 333 K. J. Supercrit. Fluids 9 (1996) 146-151
56. Akman U., and Sunol A.K. Modeling of supercritical desorbers with an equation-of-state-based isotherm. AIChE J. 37 (1991) 215-224
57. 2 extraction of organic contaminants from aqueous streams. AIChE J. 37 (1991) 950-994
58. Tan C.S., and Liou D.C. Adsorption equilibrium of toluene from supercritical carbon dioxide on activated carbon. Ind. Eng. Chem. Res. 29 (1990) 1412-1415
59. Curren M.S.S., and Burk R.C. Partitioning of acidic solutes between water and supercritical carbon dioxide. effect of pH and ionic strength. J. Chem. Eng. Data 45 (2000) 746-750
60. Gray D.J., Zytner R.G., and Stiver W.H. Supercritical carbon dioxide-soil partition coefficients. J. Supercrit. Fluids 8 (1995) 149-155
61. Young T.M., and Weber Jr. W.J. Equilibrium and rate studies of analyte-matrix interactions in supercritical fluid extraction. Anal. Chem. 69 (1997) 1612-1619
62. Secker L.E., Zytner R.G., and Stiver W.H. Soil remediation using supercritical fluid extraction. Vol. Date 1994. Proceedings of the 49th Industrial Waste Conference (1995) 383-390
63. Hartonen K., Bowadt S., Hawthorne S.B., and Riekkola M.-J. Supercritical fluid extraction with solid-phase trapping of chlorinated and brominated pollutants from sediment samples. J. Chromatogr. A 774 (1997) 229-242
64. Bjoerklund E., Bowadt S., Mathiasson L., and Hawthorne S.B. Determining PCB sorption/desorption behavior on sediments using selective supercritical fluid extraction. I. Desorption from historically contaminated samples. Environ. Sci. Technol. 33 (1999) 2193-2203
65. Langenfeld J.J., Hawthorne S.B., Miller D.J., and Pawliszyn J. Kinetic Study of supercritical fluid extraction of organic contaminants from heterogeneous environmental samples with carbon dioxide and elevated temperatures. Anal. Chem. 67 (1995) 1727-1736
66. 2 extraction efficiencies of polycyclic aromatic hydrocarbons from environmental samples. Anal. Chem. 67 (1995) 641-646
67. Hawthorne S.B., Yang Y., and Miller D.J. Extraction of organic pollutants from environmental solids with sub- and supercritical water. Anal. Chem. 66 (1994) 2912-2920
68. Langenfeld J.J., Hawthorne S.B., Miller D.J., and Pawliszyn J. Effects of temperature and pressure on supercritical fluid extraction efficiencies of polycyclic aromatic hydrocarbons and polychlorinated biphenyls. Anal. Chem. (1993) 338-344
69. Hawthorne S.B., Langenfeld J.J., Miller D.J., and Burford M.D. Comparison of supercritical chlorodifluoromethane, nitrous oxide, and carbon dioxide for the extraction of polychlorinated biphenyls and polycyclic aromatic hydrocarbons. Anal. Chem. 64 (1992) 1614-1622
70. Langenfeld J.J., Hawthorne S.B., Miller D.J., and Pawliszyn J. Role of modifiers for analytical-scale supercritical fluid extraction of environmental samples. Anal. Chem. 66 (1994) 909-916
71. Librando V., Hutzinger O., Tringali G., and Aresta M. Supercritical fluid extraction of polycyclic aromatic hydrocarbons from marine sediments and soil samples. Chemosphere 54 (2004) 1189-1197
72. 2-cosolvent extraction of contaminated soils and sediments. Environ. Prog. 9 (1990) 197-203
73. Hawthorne S.B., Galy A.B., Schmitt V.O., and Miller D.J. Effect of SFE flow rate on extraction rates: classifying sample extraction behavior. Anal. Chem. 67 (1995) 2723-2732
74. Smyth T.J., Zytner R.G., and Stiver W.H. Influence of water on the supercritical fluid extraction of naphthalene from soil. J. Hazard. Mater. 67 (1999) 183-196
75. Pratte T.S., Guigard S.E., Zytner R.G., and Stiver W.H. Influence of water on supercritical fluid extraction. Vol. Date 1996. Proceedings of the 51st Industrial Waste Conference (1997) 95-103
76. Zytner R.G. Adsorption-desorption of trichloroethylene in granular media. Water Air Soil Poll. 65 (1992) 245-255
77. Hawthorne S.B., Bjoerklund E., Bowadt S., and Mathiasson L. Determining PCB sorption/desorption behavior on sediments using selective supercritical fluid extraction. III. Sorption from Water. Environ. Sci. Technol. 33 (1999) 3152-3159
78. Hawthorne S.B., and Miller D.J. Evidence for very tight sequestration of BTEX compounds in manufactured gas plant soils based on selective supercritical fluid extraction and soil/water partitioning. Environ. Sci. Technol. 37 (2003) 3587-3594
79. Hawthorne S.B., Poppendieck D.G., Grabanski C.B., and Loehr R.C. PAH release during water desorption, supercritical carbon dioxide extraction, and field bioremediation. Environ. Sci. Technol. 35 (2001) 4577-4583
80. Hawthorne S.B., Miller D.J., Burford M.D., Langenfeld J.J., Eckert-Tilotta S., and Louie P.K. Factors controlling quantitative supercritical fluid extraction of environmental samples. J. Chromatogr. 642 (1993) 301-317
81. Burford M.D., Hawthorne S.B., and Miller D.J. Extraction rates of spiked versus native PAHs from heterogeneous environmental samples using supercritical fluid extraction and sonication in methylene chloride. Anal. Chem. 65 (1993) 1497-1505
82. Nilsson T., Bowadt S., and Bjorklund E. Development of a simple selective SFE method for the determination of desorption behavior of PCBs in two Swedish sediments. Chemosphere 46 (2002) 469-476
83. Rahme Z.G., Zytner R.G., and Stiver W.H. Kinetic Model for the Supercritical Extraction of Contaminants from Soil. ACS Symposium Series vol. 608 (1995), American Chemical Society pp. 298-312, Innovations in Supercritical Fluids
84. Pilorz K., Bjoerklund E., Bowadt S., Mathiasson L., and Hawthorne S.B. Determining PCB sorption/desorption behavior on sediments using selective supercritical fluid extraction. II. Describing PCB extraction with simple diffusion models. Environ. Sci. Technol. 33 (1999) 2204-2212
85. Clifford A.A., Burford M.D., Hawthorne S.B., Langenfeld J.J., and Miller D.J. Effect of matrix on the kinetics of dynamic supercritical fluid extraction. Faraday Trans. 91 (1995) 1333-1338
86. Bartle K.D., Boddington T., Clifford A.A., and Hawthorne S.B. The effect of solubility on the kinetics of dynamic supercritical-fluid extraction. J. Supercrit. Fluids 5 (1992) 207-212
87. Bartle K.D., Clifford A.A., Hawthorne S.B., Langenfeld J.J., Miller D.J., and Robinson R. A model for dynamic extraction using a supercritical fluid. J. Supercrit. Fluids 3 (1990) 143-149
88. Lopez-Avila V., Young R., Tehrani J., Damian J., Hawthorne S.B., Dankers J., and van der Heiden C. Mini-round-robin study of a supercritical fluid extraction method for polynuclear aromatic hydrocarbons in soils with dichloromethane as a static modifier. J. Chromatogr. A 672 (1994) 167-175
89. Ekhtera M.R., Mansoori G.A., Mensinger M.C., Rehmat A., and Deville B. Supercritical fluid extraction for remediation of contaminated soil. ACS Symp. Ser. 670 (1997) 280-298 (SC Fluids)
90. Montero G.A., Giorgio T.D., and Schnelle Jr. K.B. Scale-up economic analysis for the design of supercritical fluid extraction equipment for remediation of soil. Environ. Prog. 15 (1996) 112-121
91. 2 under quasi-isobaric conditions. Ind. Eng. Chem. Res. 39 (2000) 4597-4602
92. Alonso E., Cantero F.J., Garcia J., and Cocero M.J. Scale-up for a process of supercritical extraction with adsorption of solute onto active carbon. Application to soil remediation. J. Supercrit. Fluids 24 (2002) 123-135
93. T.E. Moody, V.J. Krukonis, M. McInerney, P. Jedrzejewski, L.T. Taylor, The feasibility of contaminated soils remediation via supercritical fluid extraction, Preprints of Papers presented at the ACS National Meeting, American Chemical Society, Division of Environmental Chemistry 33 (1993) 343-346.
94. E. Alonso, J.J. Alonso, M.J. Cocero, Soil remediation by supercritical extraction with solvent recirculation under quasi-isobaric operation conditions. Application to soil polluted by hydrocarbons, Proceedings of ISEC '99, in: M. Cox, M. Hidalgo, M. Valiente (Eds.), Barcelona, Spain, July 11-16, 1999, Solvent Extraction for the 21st Century, vol. 1, 2001, Society of Chemical Industry, London, UK, pp. 167-170.
95. Reiss I., Schleussinger A., and Schulz S. Regeneration of loaded supercritical carbon dioxide with activated carbon. Process Technol. Proc. 12 (1996) 229-234 (High Pressure Chemical Engineering)
96. Hawthorne S.B., Poppendieck D.G., Grabanski C.B., and Loehr R.C. Comparing PAH availability from manufactured gas plant soils and sediments with chemical and biological tests. I. PAH release during water desorption and supercritical carbon dioxide extraction. Environ. Sci. Technol. 36 (2002) 4795-4803
97. M.T.O. Jonker, S.B. Hawthorne, A.A. Koelmans, Extremely slow desorption and limited bioaccumulation of BC-associated PAHs, Preprints of Extended Abstracts presented at the ACS National Meeting, Division of Environmental Chemistry, vol. 45, 2005, American Chemical Society, Division of Environmental Chemistry, pp. 381-384.
98. Hawthorne S.B., Lanno R., and Kreitinger J.P. Reduction in acute toxicity of soils to terrestrial oligochaetes following the removal of bioavailable polycyclic aromatic hydrocarbons with mild supercritical carbon dioxide extraction. Environ. Toxicol. Chem. 24 (2005) 1893-1895
99. Qiu X., and Davis J.W. Environmental bioavailability of hydrophobic organochlorines in sediments-a review. Remediat. J. 14 (2004) 55-84
100. Eckert-Tilotta S.E., Hawthorne S.B., and Miller D.J. Supercritical fluid extraction with carbon dioxide for the determination of total petroleum hydrocarbons in soil. Fuel 72 (1993) 1015-1023
101. Hawthorne S.B., Grabanski C.B., Martin E., and Miller D.J. Comparisons of Soxhlet extraction, pressurized liquid extraction, supercritical fluid extraction and subcritical water extraction for environmental solids: recovery, selectivity and effects on sample matrix. J. Chromatogr. A 892 (2000) 421-433
102. Hawthorne S.B., and Grabanski C.B. Correlating selective supercritical fluid extraction with bioremediation behavior of PAHs in a field treatment plot. Environ. Sci. Technol. 34 (2000) 4103-4110
103. Schantz M.M., Bowadt S., Benner B.A., Wise S.A., and Hawthorne S.B. Comparison of supercritical fluid extraction and Soxhlet extraction for the determination of polychlorinated biphenyls in environmental matrix standard reference materials. J. Chromatogr. A 816 (1998) 213-220
104. Bowadt S., Mazeas L., Miller D.J., and Hawthorne S.B. Field-portable determination of polychlorinated biphenyls and polynuclear aromatic hydrocarbons in soil using supercritical fluid extraction. J. Chromatogr. A 785 (1997) 205-217
105. 2 extraction efficiencies of organics from environmental solids. Anal. Chem. 66 (1994) 4005-4012
106. Mannila M., Koistinen J., and Vartiainen T. Comparison of SFE with Soxhlet in the analyses of PCDD/PCDFs and PCBs in sediment. J. Environ. Monit. 4 (2002) 1047-1053
107. B.H. Carpenter, PCB (polychlorinated biphenyl) sediment decontamination, Technical/economic assessment of selected alternative treatments, EPA Report (1986) (EPA/600/2-86/112; Order No. PB87-133112/GAR), 135 pp.
108. Caruana C.M. New processes tackle PCBs. Chem. Eng. Prog. 93 (1997) 11-16
109. Meckes M.C., Tilman J., Dress L., and Saylor E. J. Air Waste Manage. Assoc. 47 (1997) 1119-1124
110. GAO Report, "EPA Has Identified Limited Alternatives to Incineration for Cleaning up PCB and Dioxin Contamination", GAO/RCED-96-13, Washington, DC, 1996.
111. Perrut M. Supercritical fluid applications: industrial developments and economic issues. Ind. Eng. Chem. Res. 39 (2000) 4531-4535
112. Kruse A., Dahmen N., and Dinjus E. Possibilities of combining extraction and oxidation with supercritical carbon dioxide for pollutant treatment. Chem. Ing. Tech. 73 (2001) 1443-1447
113. K. Johnson, "U.S. to Order $490 Million River Cleanup by G.E.", The New York Times, December 6, 2000.
114. A. Agkerman, A private discussion during a seminar at Syracuse University, 2000.