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REMOVAL OF BERYLLIUM FROM DRINKING WATER BY CHEMICAL COAGULATION AND LIME SOFTENING
Lytle*, D A., R. S. Summers, AND T J. Sorg*. REMOVAL OF BERYLLIUM FROM DRINKING WATER BY CHEMICAL COAGULATION AND LIME SOFTENING. JOURNAL OF WATER SUPPLY: RESEARCH AND TECHNOLOGY - AQUA. IWA Publishing, London, Uk, 41(6):330-339, (1992).
The effectiveness of conventional drinking water treatment and lime softening was evaluated for beryllium removal from two drinking water sources. ar test studies were conducted to determine how common coagulants (aluminum sulfate and ferric chloride and lime softening performed in removing beryllium from spiked waters. entrifugation was used to simulate filtration. he two source waters used were raw Ohio River water and groundwater from the Great Miami Aquifer. he impact of initial beryllium concentration, coagulant dose, turbidity and pH on beryllium removal was examined and optimum treatment conditions were determined. ar tests using alum and ferric chloride coagulants were able to achieve 95% and 85% removal of beryllium respectively from surface water. emoval efficiency increased as the pH was increased. nitial turbidity had no observable effect on beryllium removal when operating conditions favored the sweep floc mechanism for turbidity reduction. o change in the percent removed was observed as the spiked beryllium conCentration was increased. ime softening was able to achieve greater than 98% beryllium removal with higher removal percentages seen at the higher pHs. entrifugation had no significant impact on beryllium removal. ased on the data collected in this study, coprecipitation and precipitation are the two likely mechanisms responsible for beryllium removal.