AWWA WQTC69470

Bromide removal by anion exchange was explored for various water qualities,process configurations, and resin characteristics. Simulated natural waters containingdifferent amounts of natural organic matter (NOM), bicarbonate, chloride, and bromidewere treated with a magnetic ion exchange (MIEX) resin on a batch-basis to evaluate theeffectiveness of the resin for removal of bromide. Alkalinity (bicarbonate) and dissolvedorganic carbon (DOC) were both shown to inhibit bromide removal in waters with bromideconcentrations of 100 and 300 µg/L. Water was also treated using a two-stage batch MIEXprocess. Two-stage treatment resulted in only a slight improvement in bromide removalcompared to single-stage treatment, presumably due to competition with the highconcentration of chloride in the model waters. The effectiveness of polystyrene andpolyacrylic resins on DOC and bromide removal were compared by treating model waterswith MIEX, Ionac A-641 and Amberlite IRA910 resins. The two polystyrene resins, A-641and IRA910, were seen to be more effective for bromide removal, while the MIEX resin wasmore effective at removing DOC. Includes 22 references, table, figures.

Product Details

Edition:

Vol. - No.

Published:

11/01/2008

Number of Pages:

17

File Size:

1 file , 830 KB