The realization during the last decade that many water supplies worldwide are affected by arsenic at concentrations above acceptable health levels has motivated research directed at understanding the occurrence, distribution, and mobilization of arsenic in the environment, and stimulated the development of new, cost-effective treatment technologies. Arsenic accumulation and migration is closely tied to its chemical speciation, which is often controlled by a complex combination of abiotic and biotic processes coupled with physical transport. This symposium volume focuses on bridging the gap between different approaches and scales of investigation and on fostering a more unified understanding of arsenic occurrence and behavior, including geological, geochemical, hydrological, microbiological, ecological, and engineering aspects of arsenic-related research. Papers in this volume highlight a variety of new research directed at understanding the sources, distribution, and mobilization of arsenic in the environment. It includes recent efforts in the development of cost-effective treatment technologies and in approaches to natural attenuation and accelerated remediation methods. These topics are thematically organized into three sections in the volume, the first focusing on laboratory studies and theoretical modeling, the second on arsenic behavior and cycling in a range of field settings, and the third on studies associated with treatment and remediation technologies and methods. This book is targeted at scientists and engineers (chemists, geochemists, geologists, hydrogeologists, microbiologists, molecular biologists, chemical engineers, environmental engineers) as well as graduate students who are engaged in research on arsenic in both natural and engineered aqueous systems, and on the development of methods for arsenic treatment and removal.

1. Advances in Aresnic Research: Introductory Remarks, Peggy A. O'Day, Dimitrios Vlassopoulos, Xiaoguang Meng, and Liane Benning 2. Contrasting Sorption Behavior of Aresnic(III) and Aresnic(V) in Suspensions of Iron and Aluminum Oxyhydroxides, Janet G. Hering and Suvasis Dixit 3. Arsenate and Aresenite Sorption on and Arsenite Oxidation by Iron(II,III) Hydroxycarbonate Green Rust, Chunming Su and Richard T. Wilkin 4. Adsorption and Heterogeneous Reduction of Arsenic and the Phyllosilicate-Water Interface, L. Charlet, S. Chakraborty, S. Varma, C. Tournassat, M. Wolthers, D. Chatterjee, and G. Roman Ross 5. Arsenic Uptake by Pyrite at Ambient Environmental Conditions: A Continuous-Flow Experiment, M. Wolthers, I.B. Butler, D,. Rickard, and P.R.D. Mason 6. Transformation and Transport of Arsenic within Ferric Hydroxide Coated Sands upon Dissimilatory Reducing Bacterial Activity, Mitchell Herbel and Scott Fendorf 7. Transport of As(III) and As(V) in Experimental Subsurface Systems, Tanja Radu, Jeremiah C. Hilliard, Jae K. Yang, and Mark O. Barnett 8. Comparison of As(III) and As(V) Complexation onto Al- and Fe-Hydroxides, James D. Kubicki 9. Calculation of the Interaction of Bicarbonate Ion with Arsenites in Aqueous Solution and with the Surfaces of Al Hydroxide Minerals, J.A. Tossell 10. Arsenic Reduction by Indigenous Bacteria in Shallow Aquifers from Ambikanagar, West Bengal, India, Joyanto Routh, Ambujom Sarawathy, Sisir Kanti Nag, S.P. Sinha Ray, and Gunnar Jacks 11. Arsenic Distribution and Speciation in the Mahomet and Glasford Aquifers, Illinois, Thomas R. Holm, Walton R. Kelly, Steven D. Wilson, George S. Roadcap, Jonathan L. Talbott, and John S. Scott 12. Controls on Arsenic Concentrations in Groundwater near Lake Geneva, Wisconsin, T.L. Root, J.M. Bahr, and M.B. Gotkowitz 13. Arsenic Occurence, Sources, Mobilization, and Transport in Groundwater in the Newark Basin of New Jersey, M.E. Serfes, S.E. Spayd, G.C. Herman 14. Groudwater Geochemistry, Microbiology, and Mineralogy in Two Arsenic-Bearing Holocene Alluvial Aquifers from the United States, J.A. Sauders, S. Mohammad, N.E. Korte, M.-K. Lee, M. Fayek, D. Castle, and M.O. Barnett 15. Oxidation of Groudwater Arsenic and Iron, A.R. Keimowitz, H.J. Simpson, S.N. Chillrud, M. Stute, M. Tsang, S. Datta, and J. Ross 16. Arsenic Diagenesis at the Sediment-Water Interface of a Recently Flooded Freshwater Sediment, Stephanie S. Chow and Martial Taillefert 17. Natural Attenuation of Aresenic in Semiarid Soils Contaminated by Oxidized Arsenic Wastes, Margarita Guitierrez-Ruiz, Mario Villalobos, Francisco Romero, and Pilar Fernandez-Lomelin 18. Modeling Seasonal Arsenic Behavior in the Waikato River, New Zealand, Jenny G. Webster-Brown and Vincent Lane 19. The Applicaion of Rapid Small Scale Column Tests in Iron-Based Packed Bed Arsenic Treatment Systems, Mohammed Badruzzaman and Paul Westerhoff 20. Arsenic Removal by Activated Carbon-Based Materials, Baolin Deng, Mendy Caviness, and Zhimang Gu 21. Arsenic Removal from Drinking Water Using Clay Membranes, Jun Fang, Baolin Deng, and T.M. Whitworth 22. Zeolite Performance as an Anion Exchanger for Arsenic Sequestrian in Water, Siddesh Shevade and Robert G. Ford 23. Characterization of Arsenic-Containing Water Treatment Residuals, Hun-Young Wee and Timothy A. Kramer 24. The Roles of Hydroxyl Radical, Superoxide Anion Radical, and Hydrogen Peroxide in the Oxidization of Arsenite by Ultrasonic Irradation, Tielian Xu, Yong Cai, Stephen P. Mezyk, and Kevin E. O'Shea 25. Arsenic Removal by Zero-Valent Iron: A Field Study of Rates, Mechanisms, and Long-Term Performance, Dimitrios Vlassopoulos, Nelson Rivera, Peggy A. O'Day, Michael T. Rafferty, and Charles B. Andrews 26. Removal of Arsenic from Bangladesh Groundwater with Zero-Valent Iron, Nikolaos P. Nikolaidis, Zhongqi Cheng, and Alexander van Geen 27. Assessment of Safe Water Options for Villages in Bangladesh, Phillip T. Crisp, Ahmedul Hye Chowdhury, Andrew Lau, Quazi Quamruzzaman, and Mahmuder Rahman 28. Two-Year Operation of an Air-Iron Treatment System for the Removal of Arsenic from Simulated Bangladeshi Tubewell Water, Ahmedul Hye Chowdhury and Phillip T. Crisp 29. Geochemical Modeling of Arsenic Speciation and Mobilization: Implications for Bioremediation, Ming-Kuo Lee, James A. Saunders, Richard T. Wilkin, and Shahnewaz Mohammad

"An immensely enjoyable book, bringing a valuable research perspective to bear on arsenic chemistry and behaviour, and written in a coherent style."-- Current Engineering Practice |k No