882363

AWWA JAW49182

Journal AWWA - Ferric Chloride Plus GAC for Removing TOC

Journal Article by American Water Works Association , 02/01/1999

Nowack, Kirk O.;Cannon, Fred S.;Arora, Harish

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Full Description

Granular activated carbon (GAC) treatment is one method that water utilities can use to increase removal of natural organic matter and comply with the recently promulgated Disinfectants/Disinfection Byproducts Rule. The cost of GAC depends on its useful service life and its capacity for reuse. The research reported here used minicolumns to investigate how ferric chloride coagulation influenced the total organic carbon (TOC) subsequently removed by GAC. Ferric chloride pretreatment lengthened GAC bed life by lowering influent TOC and by rendering the TOC that remained more adsorbable. Jar tests showed that at pH < 6.0, ferric chloride was superior to aluminum salts, on an equimolar basis, for removing TOC. Includes 43 references, table, figures.
 

Product Details

Edition:
Vol. 91 - No. 2
Published:
02/01/1999
Number of Pages:
14
File Size:
1 file , 760 KB
Note:
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