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AWWA WQTC50501
- Arsenic Removal - Defining the Characteristics of Arsenic During Water Treatment
- Conference Proceeding by American Water Works Association, 01/01/1999
- Publisher: AWWA
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Indiana-American Water Company's (INAWC) groundwater treatment facility in Kokomo provides a high level of water treatment using processes that compliment conventional water treatment with specialized treatment for arsenic. Arsenic in the various groundwater sources occurs primarily in a soluble state, with As+3 predominating. Aeration at this facility has no significant effect on the composition of arsenic, while the addition of potassium permanganate and chlorine provides chemical oxidation to convert all the As+3 to As+5. Ferric chloride in combination with naturally occurring iron provides the substrate for adsorption of particulate arsenic. Once the arsenic is adsorbed onto the iron, the processes of coagulation, clarification and filtration provides the means necessary to physically remove particulate arsenic from the treated water.
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