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AWWA ACE61769
- Arsenic Desorption from Drinking Water Distribution System Solids and Iron/Activated Alumina Based Column Media
- Conference Proceeding by American Water Works Association, 06/17/2005
- Publisher: AWWA
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The objective of this study was to evaluate theeffect of pH on the release of arsenic for a select group of drinking water distribution system (DWDS) solids and fullscale treatment column media. X-ray diffraction (XRD) and ICP-AES analysiswere conducted to provide a comprehensive characterization of the solids.Aliquots of each solid and column media were added to deionized water (DIC =10 mg C/L for background alkalinity) at pH 7, 8, and 9 for 168 hours. Thesupernatant was extracted and analyzed by GFAA and ICP-AES for total arsenicand additional elemental concentrations, such as iron, aluminum and calcium.This study concluded that arsenic desorbs from DWDS solids andfull scale treatment column media. Also the amount of arsenic desorbed from theDWDS solids also increased as pH of the water increased. Includes 8 references, tables, figures.
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