The Characteristic of Macromolecule Heavy Metal Flocculant and Trapping CSAX of Hg²+ from Aqueous Solutions

Abstract

Abstract. In this paper, the flocculant and trapping performance of the crosslinked starch-graft-polyacrylamide-co-sodium xanthate (CSAX) was evaluated using wastewater that contains Hg 2+ as the target. Some factors affect the removal rate of Hg 2+ were investigated. The experimental results show that the CSAX was successfully synthesized and it has functions of removing both turbidity and Hg 2+ from aqueous solution. With the increase of pH value and CSAX dosage, the removal rate of Hg 2+ is increased gradudlly. If the presences of alkali metal and alkaline-earth metal ions in wastewater, the removal rate of Hg 2+ is improved too. Then the presences of SO 4 2-and EDTA in wastewater inhibit the removal rate of Hg 2+. Meanwhile when Hg 2+ and turbidity coexist in the wastewater, the removal rate of Hg 2+ can be promoted.