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REMOVAL OF ARSENIC FROM DRINKING WATER BY CONVENTIONAL TREATMENT METHODS
Citation:
Sorg, T. REMOVAL OF ARSENIC FROM DRINKING WATER BY CONVENTIONAL TREATMENT METHODS. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/A-94/104 (NTIS PB94182243).
Description:
The USEPA National Interim Primary Drinking Water Regulations (NIPDWR) established the maximum contaminant level (MCL) for arsenic at 0.05 mg/L in 1977. everal years ago the USEPA began to re-examine the arsenic health effects information and has indicated that the MCL could be significantly lower to somewhere in the .0002 to .005 mg/L range. etween 1973-79, DWRD conducted laboratory jar test studies and pilot plant studies to evaluate the effectiveness of a variety of treatment methods to remove arsenic from drinking water. uring this period of time, the state-of-the-art analytical methods had a minimum detectable limit (MDL) was established at a significantly higher level, no interest existed in determining the capability of these treatment methods to achieve lower concentration. urthermore, for report presentation, percent of arsenic removal for the majority of all tests was used rather than absolute values because of the flexibility in determining treated water concentrations from varying raw water concentrations. he purpose of this paper is to re-examine the jar test and pilot plant information to determine if these data indicate an ability of conventional treatment methods to achieve arsenic levels below .005 mg/L. adioactive tracers were employed for most of the jar test studies, therefore, the potential existed for determining absolute treatment water levels elow 0.005 mg/L. onventional treatment methods for this paper are classified as lime softening and coagulation filtration.