Chemical kinetics and particle size effects of activated carbon for free chlorine removal from drinking water

摘要

Activated carbon is an economic material to grab free chlorine in drinking water to reduce potential health risks.In this research, chemical kinetic reaction of the activated carbon for free chlorine removal was studied, whichexhibited the first order kinetic reaction performance. A relationship between the rate of chlorinated water flowingthrough the activated carbon, and the free chlorine (ClO) concentrations before and after the reduction byactivated carbon was obtained. The logarithm of the free chlorine concentration (lnC) was linearly related to thereciprocal of the volume flow rate (1/v). The slope was dependant on the kinetic constant of the activated carbondechlorination reaction. This research is beneficial for the scientists and engineers to study the mechanism of thechemical kinetic reaction of the free chlorine removal by activated carbon and design activated carbon-loadedwater purification reactors.