Water dechlorination by activated carbon adsorption

Abstract

Dechlorination with adsorption on activated carbons were studied on 3 types of commercial activated carbons; i.e. DEO 8/30, PHO 8/30 and HRO 8/30. The chlorine contents of the feed water and the effluent were measured with Oxidation Reduction Potential (ORP) and spectrophotometer. For the chlorine content less than 5 ppm, the isotherms were linear. The adsorption equilibrium constants on PHO 8/30 and on DEO 8/30 were 0.0016 and 0.7849 [(mg/g)/ppm], respectively. From the breakthrough results, the bed depth of an adsorber should not be less than 4-5 in. While the system required the residence time 2-2.5 minute at least. The results corresponded with the parameters used for the practical adsorber design.