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AWWA ACE61768
- A Novel Ion Exchange Process for Arsenate Removal from Drinking Water
- Conference Proceeding by American Water Works Association, 06/17/2005
- Publisher: AWWA
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This slide presentation outlines information on testing a new ion exchanger (PolymericLigand Exchanger-PLE) for selectiveremoval of As(V), anddeveloping an engineered strategy tominimize process waste residuals. Topics covered include: arsenate-sulfate breakthrough historieswith a standard IX resin; multi-component breakthroughhistories with PLE; arsenate sorption: isotherms for PLEand 2 standard resins; efficient regeneration: As(V) elutionhistory during regeneration; direct reuse of brine for multipleregeneration cycles; brine treatment and reuse; major composition of a spentregeneration brine (SRB); removal of As from SRB using FeCl<sub>3</sub>; effect of pH on arsenate removal; effect of calcium addition on As removal; treated brine reuse; effect of Fe addition on wasteresidual stability; effect of Ca addition on wasteresidual stability; and, conclusions.