单质硫改性介孔炭对水溶液中汞的吸附性能研究  

Adsorption of Hg(Ⅱ) from aqueous solutions by elemental sulfur-modified ordered mesoporous carbon

作　　者：殷俊[1] 陈光辉[1] 崔皓[1] 王静[1] 陶仙聪[2] 郑建中[1] 

机构地区：[1]南京大学环境学院,污染控制与资源化研究国家重点实验室,南京210093 [2]南京大学现代分析中心,南京210093

出　　处：《环境工程学报》2009年第12期2148-2152,共5页Chinese Journal of Environmental Engineering

基　　金：国家自然科学基金资助项目(20540420542,20377021)

摘　　要：对介孔炭CMK-3进行单质硫改性得到OMC-S,并通过静态吸附实验研究了该材料对水溶液中汞的吸附性能。研究结果表明：单质硫改性可以在介孔炭上负载12.33%的硫,从而使得介孔炭对汞的吸附容量从185 mg/g提高到476 mg/g;OMC-S具有较广的适用pH值范围,在pH 3～11.5范围内其对汞的吸附去除率均达到92%以上;氯离子对OMC-S的吸附性能具有一定的抑制作用,原因在于它能和汞离子络合形成一系列吸附性能较差的Hg-Cl络合物,而腐殖酸在所研究的范围内对OMC-S的吸附性能无明显影响。An elemental sulfur-modified ordered mesoporous carbon（OMC-S） was prepared by impregnating elemental sulfur on the surface of CMK-3.Batch tests were performed to study aqueous Hg（Ⅱ） adsorption properties of OMC-S.Results showed that 12.33% sulfur was impregnated onto CMK-3,and the Qmax was increased from 185 mg/g to 476 mg/g.Hg adsorption removal rate was generally over 92% in the range of pH 3 to 11.5.The existence of Cl-decreased Hg adsorption because of the formation of Hg-Cl complex which had weakeraffinity to OMC-S comparing with Hg-OH complex. While the existence of HA did not show obvious impact on the Hg adsorption.

关 键 词：介孔炭 单质硫 汞吸附 去除率 

分 类 号：X703[环境科学与工程—环境工程]