Download e-book for iPad: Arsenic contamination of groundwater : mechanism, analysis, by Satinder Ahuja

By Satinder Ahuja

ISBN-10: 0470144475

ISBN-13: 9780470144473

  • Provides a doable reference, describing the state-of-knowledge on assets of arsenic infection in floor water, which impacts approximately a hundred million humans worldwide.
  • With contributions from world-renowned specialists within the box, this ebook explores advancements within the shipping kinetics, detection, size, seasonal biking, accumulation, geochemistry, elimination, and toxicology of arsenic.
  • Includes compelling case stories describing how arsenic infection happens and the devastating results at the humans and setting stricken by it.

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Get Arsenic contamination of groundwater : mechanism, analysis, PDF

Offers a practicable reference, describing the state-of-knowledge on assets of arsenic infection in floor water, which impacts approximately a hundred million humans all over the world. With contributions from world-renowned specialists within the box, this ebook explores advancements within the shipping kinetics, detection, size, seasonal biking, accumulation, geochemistry, elimination, and toxicology of arsenic.

Additional resources for Arsenic contamination of groundwater : mechanism, analysis, and remediation

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R. Chowdhury, C. R. Chanda, P. P. Chowdhury, G. K. Basu, and D. Chakraborti (1996). Arsenic in groundwater in six districts of West Bengal, India. Environ. Geochem. Health, 18:5–15. , and J. G. Hering (2003). Comparison of arsenic(V) and arsenic(III) sorption onto iron oxide minerals: implications for arsenic mobility. Environ. Sci. , 37:4182–4189. Dowdle, P. , A. M. Laverman, and R. S. Oremland (1996). Bacterial dissimilatory reduction of arsenic(V) to arsenic(III) in anoxic sediments. Appl. Environ.

Our study showed that addition of acetate to anaerobic sediments, as a potential electron donor for metal reduction and a proxy for organic matter, resulted in marked stimulation in the rate of Fe(III) reduction followed by As(V) reduction and release of As(III) (Figure 1C), clearly indicating microbial involvement as well as a function of organic matter as an electron donor driving microbial 62 MICROBIAL CONTROLS ON THE GEOCHEMICAL BEHAVIOR OF ARSENIC 20 200 10 100 0 A 0 20 200 10 100 0 B 0 20 200 10 100 0 C 0 20 200 10 100 0 0 0 D Fe (II) (mmol/L) As (III) (nM) As (V) (nM) 20 40 Time (days) Figure 1 Reduction of Fe(III), and mobilization of arsenic in microcosms incubated under a range of biogeochemical regimes: (A) aerobically; (B) anaerobically; (C) anaerobically with 4 g/L sodium acetate as a proxy for organic matter; and (D) abiotic control sediments with added acetate autoclaved prior to incubation.

70 MICROBIAL CONTROLS ON THE GEOCHEMICAL BEHAVIOR OF ARSENIC We found that neither G. sulfurreducens nor G. fermentans is capable of reducing As(V) either by direct enzymatic reduction in axenic culture or by indirect reduction via microbially generated Fe(II) and mobilizing arsenic in autoclaved sediment microcosms. , 2005a). The secondary mineral phases produced by these two Fe(III)-reducing bacteria could play an important role as potential sinks for arsenic species in shallow aquifers exploited for groundwater in the Bengal delta.

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Arsenic contamination of groundwater : mechanism, analysis, and remediation by Satinder Ahuja


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