Treatment Technology to Meet the Interim Primary Drinking Water Regulations for Inorganics: Part 5

Abstract

The fifth in a series summarizing existing treatment technology to meet the inorganic National Interim Primary Drinking Water Regulations, this report describes current methods for removing barium and radionuclides from drinking water.

Radon release from water distribution system deposits

“…A number of studies have shown that radium adsorbs and/or coprecipitates to many substances that commonly exist in water treatment plants and distribution systems (5)(6)(7)(8)(9)(10)(11)(12)(13). Valentine (10,12) found that linear sorption isotherms described the adsorption of radium to hydrous iron and manganese oxides.…”

Strong‐Acid Ion Exchange for Removing Barium, Radium, and Hardness

“…7.9 Removal efficiency of Ba*+ at two fullscale ion exchange softening plants has been reported. 7 The first plant showed a reduction from 10 mg Ba2+/L to less than 1 mg/L for 153 bed volumes (BV) of water processed, and the second showed a reduction from 19 mg Ba2+/L to 1 mg/L or less for 100 bed volumes. The influent water at both plants contained 220-230 mg hardness as CaCOa/L.…”