纳米硫化锌吸附剂中汞的稳定性研究  

Study on the Stability of Mercury on Nano-ZnS Adsorbents

作　　者：张明光 李海龙[1] 赵永椿[2] 张军营[2] ZHANG Ming-Guang;LIHai-Long;ZHAO Yong-Chun;ZHANG Jun-Ying(School of Energy Science and Engineering, Central South University, Changsha 410083, China;State Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China)

机构地区：[1]中南大学能源科学与工程学院,长沙410083 [2]华中科技大学煤燃烧国家重点实验室,武汉430074

出　　处：《工程热物理学报》2018年第7期1630-1634,共5页Journal of Engineering Thermophysics

基　　金：国家自然科学基金资助项目(No.51476189);中南大学创新驱动计划项目(No.2015CXS007)

摘　　要：为了探究对纳米硫化锌吸附剂中汞的稳定性,采用重金属污染评价方法毒性特性浸出(TCLP)法对纳米硫化锌(Nano-ZnS)吸附的汞稳定性进行评价,并进一步研究了纳米硫化锌汞吸附量、浸提剂初始pH、浸出时间、液固比以及酸雨类型等对纳米硫化锌中汞稳定性的影响.结果表明:在偏酸性与偏碱性的条件下浸出液汞浓度较大,但是即使在pH=1与pH=13的情况下纳米硫化锌吸附的汞最大浸出浓度也仅分别为0.292μg/L与4.211μg/L。同时TCLP实验结果远低于TCLP标准中汞的安全浓度值25μg/L,说明纳米硫化锌吸附的汞具有良好的稳定性。In order to study the stability of mercury on the nano-ZnS adsorbent, the stability of mercury adsorbed by nano-ZnS was evaluated by a method of heavy metal pollution evaluation called the toxicity characteristic leaching procedure（TCLP）, all kinds of factors, such as mercury adsorption capacity on nano-ZnS, pH values of leaching agent, leaching time, liquid-solid ratio, acid rain type,which could influence extraction are studied. The result showed that the mercury concentration in the leachate increased at both low and high pH values, but even in the case of pH=1 and pH= 13, the maximum leaching concentration of mercury onthe nano-ZnSwas only 0.292 μg/L and 4.211 μg/L,respectively.At the same time, the result of TCLP was much lower than the TCLP safety concentration of 25 μg/L, which indicated that the mercury adsorbed by thenano-ZnShad good stability.

关 键 词：纳米硫化锌 汞 浸出 稳定性 

分 类 号：TK16[动力工程及工程热物理—热能工程]