Abstract
Abstract
Wet flue gas desulfurization system has been widely installed in China, but this system cannot scrub Hg0 efficiently; hence, it is reasonable to find a cost-effective method to convert Hg0 to Hg2+. This work focused on oxidizing elemental mercury by aqueous potassium hypochlorite (KClO) in a bubble reactor. Effects of initial oxidizing solution concentration, reaction temperature, pH, and mercury concentration in the inlet of the reactor on mercury oxidative absorption in KClO were investigated. Results indicate that higher concentrations of KClO favor Hg0 removal, with a greater efficiency observed in acidic than in alkaline solution. High temperature inhibits Hg0 absorption in aqueous absorbent. The pH value increases during the reaction process, and the reaction system depletes H+ or produces OH−.
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