By W R Chappell; C O Abernathy; R L Calderon
Read Online or Download Arsenic Exposure and Health Effects IV : Fourth International Conference on Arsenic Exposure and Health Effects, 18-22 July, 2000, San Diego, USA PDF
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Extra info for Arsenic Exposure and Health Effects IV : Fourth International Conference on Arsenic Exposure and Health Effects, 18-22 July, 2000, San Diego, USA
9 µg l 1 (mean values, respectively, 159 µg l 1 , 102 µg l 1 and <3 µg l 1 ). Analyses of groundwater from open dug wells show that these are typically more oxidising as a result of localised oxidation in the well vicinity or lack of reduction in the shallowest parts of the aquifers close to the water table. Groundwater from dug wells Summary of groundwater quality in aquifers from three study areas in Bangladesh Units Lakshmipur shallow groundwater (<150 m) Min. 6 Faridpur shallow groundwater (<100 m) Max.
3). , As(III) is around 60% of the AsT ) where dissolved AsT concentrations are high. This suggests that reduction of As(V) to As(III) could be an important control on the release of As into solution. 4 mg l 1 ) and also often high P (up to 5 mg l 1 ; Table 1). , Clark and Fritz, 1997). Oxidation of organic matter is believed to have been a key factor in the generation of the strongly reducing conditions in the Bangladesh aquifers and is a major cause of the high alkalinity values (up to 1140 mg l 1 ) which are characteristic of the Bangladesh groundwaters.
1989. The distribution of arsenic(III) and arsenic(V) in geothermal waters: Examples from the Massif Central of France, the Island of Dominica in the Leeward Islands of the Caribbean, the Valles Caldera of New Mexico, USA, and southwest Bulgaria. Chem. , 76, 259–269. A. E. 1990. The oxidation states of arsenic in well-water from a chronic arsenicism area of northern Mexico. Environ. , 64, 143–153. A. M. 1990. Surface Complexation Modelling — Hydrous Ferric Oxide. Wiley, New York. J. J. 1979. Chemistry and Geothermal Systems.
Arsenic Exposure and Health Effects IV : Fourth International Conference on Arsenic Exposure and Health Effects, 18-22 July, 2000, San Diego, USA by W R Chappell; C O Abernathy; R L Calderon