Trihalomethane precursor removal using ion exchange emulsions
AssigneeRohm and Haas Company
InventorsEric G. Isacoff, James W. Neely
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Abstract
To avoid formation of toxic trihalomethanes in drinking waters disinfected with halogens, these waters are treated with fine-particle-size ion exchange resin particles, optionally in the presence of a metal salt coagulant, to remove the trihalomethane precursors prior to halogenation.
Claims15
A process for removing trihalomethane precursors from water containing said precursors which comprises treating the water, at a rate of from about 1 to about 25 milligrams of resin per liter of water, with a fine-particle-size anion exchange resin having an equilibrium parameter of K.sub.e =6.times.10.sup.5 cm.sup.3 /g or greater, a kinetic parameter of K.sub.k =6 sec.sup.-1 or greater, and a combined value of K.sub.e /10.sup.5 +K.sub.k of about 13 to about 22, and subsequently removing the resin from the water.
Dependencies are inferred from the claim text.