By Peggy A. O'Day, Dimitrios Vlassopoulos, Xiaoguang Meng, Liane G. Benning
The conclusion over the last decade that many water offers all over the world are suffering from arsenic at concentrations above appropriate health and wellbeing degrees has inspired learn directed at figuring out the incidence, distribution, and mobilization of arsenic within the setting, and influenced the improvement of latest, affordable remedy applied sciences. Arsenic accumulation and migration is heavily tied to its chemical speciation, that is frequently managed by means of a posh blend of abiotic and biotic strategies coupled with actual shipping. This symposium quantity specializes in bridging the space among diversified techniques and scales of research and on fostering a extra unified knowing of arsenic prevalence and behaviour, together with geological, geochemical, hydrological, microbiological, ecological, and engineering elements of arsenic-related examine. Papers during this quantity spotlight quite a few new study directed at realizing the assets, distribution, and mobilization of arsenic within the atmosphere. It comprises fresh efforts within the improvement of competitively priced remedy applied sciences and in techniques to average attenuation and speeded up remediation tools. those issues are thematically equipped into 3 sections within the quantity, the 1st targeting laboratory reviews and theoretical modeling, the second one on arsenic habit and biking in various box settings, and the 3rd on stories linked to remedy and remediation applied sciences and strategies. This booklet is concentrated at scientists and engineers (chemists, geochemists, geologists, hydrogeologists, microbiologists, molecular biologists, chemical engineers, environmental engineers) in addition to graduate scholars who're engaged in study on arsenic in either normal and engineered aqueous platforms, and at the improvement of equipment for arsenic therapy and removal.
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Additional resources for Advances in Arsenic Research. Integration of Experimental and Observational Studies and Implications for Mitigation
Environ. Sci. Technol. 2001, 35, 2026-2032. ; Farrell, J. Environ. Sci. Technol. 2001, 35, 2074-2081. ; Isleyen, M. Water Res. 2001, 35, 4474-4479. ;Conklin,M;Farrell, J. Environ. Sci. Technol. 2002, 36, 3188-3193. ; Hunt, M . ; Yarmoff, J. A . Environ. Sci. Technol. 2002, 36, 5455-5461. ; Jekel, M . Water Sci. Technol: Water Supply. 2002, 2, 237-245. Wilkin, R. ; McNeil, M . S. Chemosphere 2003, 53, 715-725. ;Puls, R. W. Environ. Sci. Technol. 2003, 37, 2582-2587. Nikolaidis, N. ; Dobbs, G. ; Lackovic, J.
1 1 2 3 XPS and PIXE Spectroscopy The XPS measurements were conducted using a V G system with a base pressure of 1 χ 10" Torr at the Insitute of Physics, Bubaneshwar, India. The analyzer was operated with a pass energy of 200eV for large size survey scans of 01000eV. For high resolution scans a pass energy of 50 or 20eV was utilized. The XPS system is equipped with dual M g - A l anodes and a hemispherical analyzer. ; ACS Symposium Series; American Chemical Society: Washington, DC, 2005. 6eV) radiation was used at 300W.
Total arsenic concentrations measured with ICP-OES were generally in good agreement within 10% with the sum of As(V) and As(III) from IC-HG-AFS measurements. The Langmuir sorption isotherm, X = KMC/(1 + KC), was used to describe As sorption as a function of equilibrium concentration, where X is the amount of As sorbed (mg kg* ), Κ (L mg" ) is a parameter related to the affinity of the sorbent for the sorbate, M (mg kg" ) is the maximum As sorption capacity, and C is the As concentration in the equilibrium solution (mg L" ).