Deeper groundwater chemistry and geochemical modeling of the arsenic affected western Bengal basin, West Bengal, India

Applied Geochemistry

Volumn 23, Issue 4, 2008, Pages 863-894

  Mukherjee, Abhijit ^a   Fryar, Alan E ^a  

^a UNIVERSITY OF KENTUCKY   (United States)

Author keywords

[No Author keywords available]

Indexed keywords

AQUIFERS; ARSENIC; CATCHMENTS; ION EXCHANGE; WEATHERING;

CATION EXCHANGE; GROUNDWATER CHEMISTRY; HYDROGEOCHEMICAL STUDY; SEMICONFINED AQUIFERS;

HYDROGEOLOGY;

ARSENIC; DISSOLUTION; EQUILIBRIUM; GEOCHEMISTRY; GROUNDWATER; HYDROGEOCHEMISTRY; ION; MODELING; RIVER WATER; SEAWATER; SPATIAL ANALYSIS;

ASIA; BAY OF BENGAL; BHAGIRATHI RIVER [WEST BENGAL]; EURASIA; HOOGHLY; INDIA; INDIAN OCEAN; SOUTH ASIA; WEST BENGAL;

EID: 41049112851     PISSN: 08832927     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.apgeochem.2007.07.011     Document Type: Article

References (106)

1. Abdullah M.I., Shiyu Z., and Mosgren K. Arsenic and selenium species in the oxic and anoxic waters of the Oslof-jord, Norway. Mar. Pollut. Bull. 31 (1995) 116-126
2. Acharyya S.K., Lahiri S., Raymahashay B.C., and Bhowmik A. Arsenic poisoning in the Ganges delta. Nature 401 (1999) 545
3. Aggarwal, P.K., Basu, A.R., Kulkarni, K.M., Froehlich, K., Tarafdar, S.A., Ali, M., Hussain, A., 2000. A Report on Isotope Hydrology of Groundwater in Bangladesh: Implications for Characterization and Mitigation of Arsenic in Groundwater. International Atomic Energy Agency-TC Project BGD/8/016.
4. Ahmed, K.M., 1994. Hydrogeology of the Dupi Tila Aquifer of the Barind Tract, NW Bangladesh. Unpubl. Ph.D. Thesis. Univ. London, London.
5. Ahmed K.M., Bhattacharya K.M., Hasan M.A., Akhter S.H., Alam M., Bhuyian M.A.H., Imam M.B., Khan A.A., and Sracek O. Arsenic enrichment in groundwater of the alluvial aquifers in Bangladesh: an overview. Appl. Geochem. 19 (2004) 181-200
6. 4 gas in Bangladesh. J. Geol. Soc. India 51 (1998) 697-708
7. Alam M., Alam M.M., Curray J.R., Chowdhury M.L.R., and Gani M.R. An overview of the sedimentary geology of the Bengal basin in relation to the regional tectonic framework and basin-fill history. Sed. Geol. 155 (2003) 179-208
8. Allison, J.D., Brown, D.S., Novo-Gradac, K.J., 1990. MINTEQA2/PRODEFA2A geochemical assessment model for environmental systemsversion 3.0 user's manual. Environmental Research Laboratory. Office of Research and Development, U.S. EPA, Athens, Georgia.
9. Back, W., 1966. Hydrochemical facies and groundwater flow patterns in northern part of Atlantic Coastal Plain. U.S. Geol. Surv. Prof. Paper 498-A.
10. Banerjee M., and Sen P.K. Palaeobiology in understanding the change in sea level and the coast line in Bengal Basin during Holocene period. Ind. J. Earth Sci. 14 (1987) 307-320
11. Barker J.F., and Fritz P. The occurrence and origin of methane in some groundwater flow systems. Can. J. Earth Sci. 18 (1981) 1802-1816
12. Baumler R., and Zech W. Soils of the high mountain region of Eastern Nepal: classification, distribution and soil forming processes. Catena 22 (1994) 85-103
13. Bednar A.J., Garbarino J.R., Ranville J.F., and Wildeman T.R. Preserving the distribution of inorganic arsenic species in groundwater and acid mine drainage samples. Environ. Sci. Technol. 36 (2002) 2213-2218
14. Berner R.A. A new geochemical classification of sedimentary environments. J. Sed. Petrol. 51 (1981) 359-365
15. BGS/DPHE, 2001. Arsenic contamination of groundwater in Bangladesh, vol. 2: final report. In: Kinniburgh, D.G., Smedley, P.L. (Eds.), Brit. Geol. Surv. (BGS) Technical Report WC/00/19. British Geological Survey, Keyworth.
16. Bhattacharya P., Chatterjee D., and Jacks G. Occurrence of arsenic-contaminated groundwater in alluvial aquifers from the Delta Plain, Eastern India: options for a safe drinking water supply. Water Resour. Dev. 13 (1997) 79-92
17. Bhattacharya P., Jacks G., Ahmed K.M., Khan A.A., and Routh J. Arsenic in groundwater of the Bengal Delta Plain aquifers in Bangladesh. Bull. Environ. Contam. Toxicol. 69 (2002) 538-545
18. Böttcher J., Strebel O., Voerkelius S., and Schmidt H.L. Using isotope fractionation of nitrate-nitrogen and nitrate-oxygen for evaluation of microbial denitrification in sandy aquifer. J. Hydrol. 114 (1990) 413-424
19. Burbank D.W. Causes of recent Himalayan uplift deduced from deposited patterns in the Ganges basin. Nature 357 (1992) 680-683
20. CGWB, 1994a. Hydrogeological atlas of West Bengal, Scale 1: 2,000,000. Central Ground Water Board (CGWB), Eastern Region, Calcutta, Government of India.
21. CGWB, 1994b. Hydrogeology and groundwater resource of South 24 Parganas, West Bengal. Technical Report, Series D. Central Ground Water Board (CGWB), Eastern Region, Calcutta, Government of India.
22. Chakraborti D., Basu G.K., Biswas B.K., Chowdhury U.K., Rahman M.M., Paul K., Chowdhury T.R., Chanda C.R., Lodh D., and Ray S.L. Characterization of arsenic-bearing sediments in the Gangetic delta of West Bengal, India. In: Chappell W.R., Abernathy C.O., and Calderon R. (Eds). Arsenic Exposure and Health Effects IV (2001), Elsevier Science Ltd., Oxford 27-52
23. Chapelle F.H. Ground Water Microbiology and Geochemistry (1993), John Wiley & Sons, Inc., New York
24. Chapelle F.H., and Lovley D.R. Competitive-exclusion of sulphate reduction by Fe(III)-reducing bacteria - a mechanism for producing discrete zones of high-iron groundwater. Ground Water 30 (1992) 29-36
25. Charlet L., Chakraborty S., Appelo C.A.J., Roman-Ross G., Nath B., Ansari A.A., Lanson M., Chatterjee D., and Mallik S.B. Chemodynamics of an arsenic "hotspot" in a West Bengal aquifer: a field and reactive transport modeling study. Appl. Geochem. 22 (2007) 1273-1292
26. Chatterjee, D., Jana, J., Jacks, G., Bhattacharya, P., 2004. Natural arsenic in groundwaters of West Bengal, India: examples from the districts of Nadia and South 24 Parganas. In: Proc. 32nd IGC, Florence, Italy, BWO 06-42.
27. Chowdhury T.R., Basu G.K., Mandal B.K., Biswas B.K., Samanta G., Chowdhury U.K., Chanda C.R., Lodh D., Roy S.L., Saha K.C., Roy S., Kabir S., Quamrazzaman Q., and Chakraborti D. Arsenic poisoning in the Ganges Delta. Nature 401 (1999) 545-546
28. Das D., Chatterjee A., Mandal B.K., Samanta G., Chakraborti D., and Chanda B. Arsenic in groundwater in 6 districts of West Bengal, India. Environ. Geochem. Health 18 (1996) 5-15
29. Davis J.C. Statistics and Data Analysis in Geology (1986), John Wiley and Sons, New York
30. 86Sr: impact on the marine Sr record. Earth Planet. Sci. Lett. 142 (1996) 59-74
31. Dowling C.B., Poreda R.J., and Basu A.R. The groundwater geochemistry of the Bengal basin: weathering, chemosorption, and trace metal flux to the oceans. Geochim. Cosmochim. Acta 67 (2003) 2117-2136
32. Dowling C.B., Poreda R.J., Basu A.R., and Peters S.L. Geochemical study of arsenic release mechanisms in the Bengal basin groundwater. Water Resour. Res. 38 (2002) 1173-1191
33. Dreher T. Comment on Güler et al., 2002, "Evaluation of graphical and multivariate methods for classification of water chemistry data". Hydrogeol. J. 11 (2003) 605-606
34. Drever J.I. The Geochemistry of Natural Waters. 3rd ed. (1997), Prentice-Hall, Upper Saddle River, NJ
35. Edmunds W.M., Bath A.H., and Miles D.L. Hydrochemical evolution of the East Midlands Triassic sandstone aquifer, England. Geochim. Cosmochim. Acta 46 (1981) 2069-2081
36. Farmer J.G., and Lovell M.A. Natural enrichment of arsenic in Loch Lomond sediments. Geochim. Cosmochim. Acta 50 (1986) 2059-2067
37. Faure G. Principles and Applications of Geochemistry. 2nd ed. (1998), Prentice Hall, Upper Saddle River, NJ
38. Fogg, G.E., Kreitler, C.W., 1982. Ground-water hydraulics and hydrochemical facies in Eocene aquifers of the East Texas basin. Rep. Invest. No. 127, Bureau of Economic Geology, Univ. Texas at Austin.
39. Foster M.D. The origin of high sodium bicarbonate waters in the Atlantic and Gulf Coastal Plains. Geochim. Cosmochim. Acta 1 (1950) 33-48
40. Fryar A.E., Mullican III W.F., and Macko S.A. Groundwater recharge and chemical evolution in the southern High Plains of Texas, USA. Hydrogeol. J. 9 (2001) 522-542
41. 2 consumption rates deduced from the chemistry of large rivers. Chem. Geol. 159 (1999) 3-30
42. Gallagher P.A., Schegel C.A., Wei X., and Creed J.T. Speciation and preservation of inorganic arsenic in drinking water sources using EDTA with IC separation and ICP-MS detection. J. Environ. Monitor. 3 (2001) 371-376
43. Galy A., and France-Lanord C. Weathering processes in the Ganges-Brahmaputra basin and the riverine alkalinity budget. Chem. Geol. 159 (1999) 31-60
44. Garai R., Chakraborty A.K., Dey S.B., and Saha K.C. Chronic arsenic poisoning from tube-well water. J. Ind. Med. Assoc. 82 (1984) 32-35
45. Gavrieli I., Zheng Y., van Geen A., Stute M., Dhar R., Ahmed K.M., Simpson J., and Goldstein S.L. Hydrogeochemical study of arsenic contamination in Bangladesh groundwater-role of redox condition. J. Conf. Abstract 5 (2000) 435
46. Grout, H., 1995. Characterization physique, mineralogique, chimique et signification de la charge particulaire et colloýdale derivieres de la zone subtropicale. Unpubl PhD Thesis. Aix-Marseille, France.
47. Guha Mazumder D.N., Haque R., Ghosh N., De B.K., Santra A., Chakraborty D., and Smith A.H. Arsenic level in drinking water and the prevalence of skin lesions in West Bengal, India. Internat. J. Epidem. 27 (1999) 871-877
48. Güler C., Thyne G.D., McCray J.E., and Turner A.K. Evaluation of graphical and multivariate statistical methods for classification of water chemistry data. Hydrogeol. J. 10 (2002) 455-474
49. Handa, B.K., 1972, Geochemical characteristics and quality of groundwater in Gangetic West Bengal. Proc. Geohydrology and Geotechniques of the Lower Ganga Basin, IIT Kharagpur, W.B., B65B81.
50. Hansen L.K., Jakobsen R., and Postma D. Methanogensis in a shallow sandy aquifer, Romo, Denmark. Geochim. Cosmochim. Acta 65 (2001) 2925-2935
51. Harvey C.F., Swartz C.H., Badruzzaman A.B.M., Keon-Blute N., Yu W., Ali M.A., Jay J., Beckie R., Niedan V., Brabander D., Oates P.M., Ashfaque K.N., Islam S., Hemond H.F., and Ahmed M.F. Arsenic mobility and groundwater extraction in Bangladesh. Science 298 (2002) 1602-1606
52. Harvey C.F., Swartz C.H., Badruzzaman A.B.M., Keon-Blute N., Yu W., Ali M.A., Jay J., Beckie R., Niedan V., Brabander D., Oates P.M., Ashfaque K.N., Islam S., Hemond H.F., and Ahmed M.F. Groundwater arsenic contamination on the Ganges Delta: biogeochemistry, hydrology, human perturbations, and human suffering on a large scale. Compt. Rend. Geosci. 337 (2005) 285-296
53. Islam F.S., Gault A.G., Boothman C., Polya D.A., Charnock J.M., Chatterjee D., and Lloyd J.R. Role of metal-reducing bacteria in arsenic release from Bengal delta sediments. Nature 430 (2004) 68-71
54. Jacks G., Sharma V.P., Trossander P., and Aberg G. Origin of sulphur in soil and water in a Precambrian terrain, South India. Geochem. J. 28 (1994) 351-358
55. Jackson R.E., and Patterson R.J. Interpretation of pH and Eh trends in a fluvial-sand aquifer system. Water Resour. Res. 18 (1982) 1255-1268
56. JICA, 2002. The study on the ground water development of deep aquifers for safe drinking water supply to arsenic affected areas in western Bangladesh. Draft Final Report, Book 1-3. Japan International Cooperation Agency, Kokusai Kogyo Co., Ltd. and Mitsui Mineral Development Engineering Co., Ltd.
57. Korom S.F. Natural denitrification in the saturated zone: a review. Water Resour. Res. 28 (1992) 1657-1668
58. Kuivila K.M., Murray J.W., Devol A.H., and Novelli P.C. Methane production, sulfate reduction and competition for substrates in the sediments of Lake Washington. Geochim. Cosmochim. Acta 53 (1989) 409-416
59. Lahm T.D., Bair E.S., and Vanderkwaak J. Role of salinity-derived variable-density flow in the displacement of brine from a shallow, regionally extensive aquifer. Water Resour. Res. 34 (1998) 1469-1480
60. Land L.S., and Prezbindowski D. The origin and evolution of saline formation waters, Lower Cretaceous carbonates, south-central Texas, USA. J. Hydrol. 54 (1981) 51-74
61. Langmuir D. Aqueous Environmental Geochemistry (1997), Prentice Hall, Upper Saddle River, NJ
62. Lee R.W., and Strickland D.S. Geochemistry of groundwater in Tertiary and Cretaceous sediments of the southeastern Coastal Plain in eastern Georgia, South Carolina, and southeastern North Carolina. Water Resour. Res. 24 (1988) 291-303
63. Lowers H.A., Breit G.N., Foster A.L., Whitney J., Yount J., Uddin M.N., and Muneem A.A. Arsenic incorporation into authigenic pyrite, Bengal Basin sediment, Bangladesh. Geochim. Cosmochim. Acta 71 (2007) 2699-2717
64. Mallick S., and Rajagopal N.R. Groundwater development in the arsenic-affected alluvial belt of West Bengal - some questions. Curr. Sci. 70 (1995) 956-958
65. McArthur J.M., Ravenscroft P., Safiullah S., and Thirlwall M.F. Arsenic in groundwater: testing pollution mechanisms for aquifers in Bangladesh. Water Resour. Res. 37 (2001) 109-117
66. McArthur J.M., Banerjee D.M., Hudson-Edwards K.A., Mishra R., Purohit R., Ravenscroft P., Cronin A., Howarth R.J., Chatterjee A., Talukder T., Lowry D., Houghton S., and Chadha D. Natural organic matter in sedimentary basins and its relation to arsenic in anoxic groundwater: the example of West Bengal and its worldwide implications. Appl. Geochem. 19 (2004) 1255-1293
67. Mehta, B.C., Bhattacharya, M., ca. 2000. Hydrogeochemistry of mobilization of arsenic in groundwater of West Bengal, India. Central Ground Water Board, Calcutta.
68. Morgan, C.O., Winner, M.D., 1962. Hydrochemical facies in the 400 foot and 600 foot sands of Baton Rouge area, Louisiana. U.S. Geol. Surv. Prof. Paper 450-B, B120-121.
69. Mukherjee, A., 2006. Deeper groundwater chemistry and flow in the arsenic affected western Bengal basin, West Bengal, India. Unpubl Ph.D., Univ. Kentucky, Lexington.
70. Mukherjee A., Fryar A.E., and Howell P.D. Regional hydrostratigraphy and groundwater flow modeling of the arsenic contaminated aquifers of the western Bengal basin, West Bengal, India. Hydrogeol. J. 15 (2007) 1397-1418
71. Mukherjee A., Fryar A.E., and Rowe H.D. Regional scale stable isotopic signature and recharge of the deep water of the arsenic affected areas of West Bengal, India. J. Hydrol. 334 (2007) 151-161
72. Nickson R., McArthur J.M., Ravenscroft P., Burgess W.G., and Rahman M. Arsenic poisoning of groundwater in Bangladesh. Nature 395 (1998) 338
73. Nickson R., McArthur J.M., Ravenscroft P., Burgess W.G., and Ahmed M. Mechanism of arsenic release to groundwater, Bangladesh and West Bengal. Appl. Geochem. 15 (2000) 403-411
74. Nordstrom, D.K., Plummer, L.N., Wigley, T.M.L., Wolery, T.J., Ball, J.W., Jenne, E.A., Bassett, R.L., Crerar, D.A., Florence, T.M., Fritz, B., Hoffman, M., Holdren Jr., G.R., Lafon, G.M., Mattigod, S.V., McDuff, R.E., Morel, F., Reddy, M.M., Sposito, G., Thrailkill, J., 1979. A comparison of computerized chemical models for equilibrium calculations in aqueous systems. In: Jenne, E.A. (Ed.), Chemical Modeling in Aqueous Systems, Speciation, Sorption, Solubility, and Kinetics. Am. Chem. Soc. Symp. Series 93, pp. 857-892.
75. Oremland R.S. Biogeochemistry of methanogenic bacteria. In: Zehnder A.J.B. (Ed). Biology of Anaerobic Microorganisms (1988), Wiley, New York 641-706
76. Parkes R.J., Cragg B.A., Fry J.C., Herbert R.A., and Wimpenny J.W.T. Bacterial biomass and activity in deep sediment layers from the Peru margin. Phil. Trans. Roy. Soc. Lond. A331 (1990) 139-153
77. Parkhurst, D.L., Appelo, C.A.J., 1999. User's guide to PHREEQC (version 2): a computer program for speciation, batch-reaction, one-dimensional transport, and inverse geochemical calculations. U.S. Geol. Surv. Water Resour. Invest. Rep. 99-4259.
78. Parkhurst, D.L., Christenson, S., Breit, G.N., 1996. Ground-water quality assessment of the Central Oklahoma aquifer, Oklahoma - geochemical and geohydrologic investigations. U.S. Geol. Surv. Water-Supply Paper 2357-C.
79. Piper A.M. A graphic procedure in the geochemical interpretations of water analyses. Trans. Am. Geophys. Union 25 (1944) 914-923
80. Plummer, L.N., Prestemon, E.C., Parkhurst, D.L., 1994. An interactive code (NETPATH) for modeling net geochemical reactions along a flow path, version 2.0. U.S. Geol. Surv. Water-Resour. Invest. Rep. 94-4169.
81. - reduction interface. Geochim. Cosmochim. Acta 60 (1996) 3169-3175
82. Ranganathan V., and Hanor J.S. A numerical model for the formation of saline waters due to diffusion of dissolved NaCl in subsiding sedimentary basins with evaporites. J. Hydrol. 92 (1987) 97-120
83. Ravenscroft P., Burgess W.G., Ahmed K.M., Burren M., and Perrin J. Arsenic in groundwater of the Bengal basin, Bangladesh: distribution, field relations, and hydrogeologic setting. Hydrogeol. J. 13 (2005) 727-751
84. Ravenscroft P., McArthur J.M., and Hoque B. Geochemical and palaeohydrological controls on pollution of groundwater by arsenic. In: Chappell W.R., Abernathy C.O., and Calderon R. (Eds). Arsenic Exposure and Health Effects IV (2001), Elsevier Science Ltd., Oxford 53-77
85. Ross, B., Parrott, K., Woodard, J., 1999. Household water quality: hydrogen sulfide in household water. Virginia Polytechnic Institute and State University, Virginia Cooperative Extension, Pub. No. 356-488.
86. Saha, A.K., 1991. Genesis of arsenic in groundwater in parts of West Bengal. Center for Studies on Man and Environment, Calcutta, Annual Volume.
87. Schwartz F.W., and Zhang H. Fundamentals of Ground Water (2002), John Wiley & Sons, Inc., New York
88. Seyler P., and Martin J.M. Biogeochemical processes affecting arsenic species distribution in a permanently stratified lake. Environ. Sci. Technol. 23 (1989) 1258-1263
89. Sikdar P.K., Sarkar S.S., and Palchoudhury S. Geochemical evolution of groundwater in the Quaternary aquifer of Calcutta and Howrah, India. J. Asian Earth Sci. 19 (2001) 579-594
90. Smith A.H., Lingas E.O., and Rahman M. Contamination of drinking-water by arsenic in Bangladesh: a public health emergency. Bull. WHO 78 (2000) 1093-1103
91. Sracek, O., Bhattacharya, P., Ahmed, K.M., Bromsen, M.V., 2004. Geochemistry of arsenic-enriched groundwater of Brahmanbaria district, Bangladesh: speciation modeling and multivariate statistics. In: Proc. 32nd IGC, Florence, Italy, BWO 0624.
92. Stallard R.F., and Edmond J.M. Geochemistry of Amazon 2. The influence of geology and weathering environment on the dissolved load. J. Geophys. Res. 88 (1983) 9671-9688
93. Stüben D., Berner Z., Chandrashekharam D., and Karmakar J. Arsenic enrichment in groundwater of West Bengal, India: geochemical evidence for mobilization of As under reducing conditions. Appl. Geochem. 18 (2003) 1417-1434
94. Stumm W., and Morgan J.J. Aquatic Chemistry. 3rd ed. (1996), Wiley, New York
95. Swartz C.H., Blute N.K., Badruzzaman B., Ali A., Brabander D., Jay J., Besancon J., Islam S., Hemond H.F., and Harvey C.F. Mobility of arsenic in a Bangladesh aquifer: inferences from geochemical profiles, leaching data, and mineralogical characterization. Geochim. Cosmochim. Acta 66 (2004) 4539-4557
96. Tardy Y. Characterization of the principal weathering types by the geochemistry of waters from some European and African crystalline massifs. Chem. Geol. 7 (1971) 253-271
97. Umitsu M. Late Quaternary sedimentary environment and landform evolution in the Bengal Lowland. Geograph. Rev. Jap. Series B 60 (1987) 164-178
98. Umitsu M. Late Quaternary sedimentary environments and landforms in the Ganges Delta. Sed. Geol. 83 (1993) 177-186
99. van Geen A., Rose J., Thoral S., Garnier J.M., Zheng Y., and Bottero J.Y. Decoupling of As and Fe release to Bangladesh groundwater under reducing conditions. Part II. Evidence from sediment incubations. Geochim. Cosmochim. Acta 68 (2004) 3475-3486
100. Varner, D., Skipton, S., Jasa, P., Dvorak, B., 2004. Drinking water: sulfates and hydrogen sulfide. University of Nebraska-Lincoln Extension Webguide Pub. No. G1275.
101. Wanty R.B., and Goldhaber M.B. Thermodynamics and kinetics of reactions involving vanadium in natural systems: accumulation of vanadium in sedimentary rocks. Geochim. Cosmochim. Acta 56 (1992) 1471-1483
102. Ward J.H. Hierarchical grouping to optimize an objective function. J. Am. Stat. Assoc. 69 (1963) 236-244
103. Wood, W.W., 1981, Guidelines for collection and field analysis of ground-water samples for selected unstable constituents. U.S. Geol. Surv. Techniques Water-Resour. Invest. Book 1 (Chapter D2).
104. Zachara J.M., Fredrickson J.K., Li S.M., Kennedy D.W., Smith S.C., and Gassman P.L. Bacterial reduction of crystalline Fe(III) oxides in single phase suspensions and subsurface materials. Am. Mineral. 83 (1998) 1426-1443
105. Zheng Y., Stute M., van Geen A., Gavrieli I., Dhar R., Simpson H.J., Schlosser P., and Ahmed K.M. Redox control of arsenic mobilization in Bangladesh groundwater. Appl. Geochem. 19 (2004) 201-214
106. Zheng Y., van Geen A., Stute M., Dhar R., Mo Z., Cheng Z., Horneman A., Gavrieli A., Simpson H.J., Versteeg R., Steckler M., Grazioli-Venier A., Goodbred S., Shanewaz M., Shamsudduha M., Hoque M., and Ahmed K.M. Geochemical and hydrogeological contrasts between shallow and deeper aquifers in two villages of Araihazar, Bangladesh: implications for deeper aquifers as drinking water sources. Geochim. Cosmochim. Acta 69 (2005) 5203-5218