PS-TMT树脂的合成及其对水溶液中Hg(Ⅱ)的吸附性能  

Synthesis of PS-TMT chelating resin and its adsorption of Hg(Ⅱ) from aqueous solution

作　　者：王世明[1,2] 李红玲[1,2] 杨敏[1] 陈小亚[1,2] 齐彦兴[1] 

机构地区：[1]中国科学院兰州化学物理研究所精细石油化工中间体国家工程中心,兰州730000 [2]中国科学院研究生院,北京100049

出　　处：《环境工程学报》2013年第5期1761-1766,共6页Chinese Journal of Environmental Engineering

基　　金：中国科学院科技支甘工程项目(XBLZ-2011-013)

摘　　要：以氯甲基聚苯乙烯树脂为载体与三聚硫氰酸反应,合成了功能化的螯合树脂PS-TMT,并对其进行了元素分析、红外光谱以及比表面表征。通过静态吸附实验研究了其对水溶液中Hg(Ⅱ)的吸附性能,结果表明,PS-TMT螯合树脂在pH值1～7范围内对Hg(Ⅱ)具有良好的吸附能力,在25℃、pH 7条件下对Hg(Ⅱ)的最大吸附容量为344 mg/g;动力学研究显示树脂对Hg(Ⅱ)的吸附在240 min内可达到吸附平衡,吸附动力学过程符合准二级动力学模型;吸附等温线则符合Langmuir吸附等温线模型。Trimercaptotriazine functionalized polystyrene chelating resin was synthesized by the reaction of trimercaptotriazine with macroporous chloromethyl resin. The chelating resin, characterized by elemental analy-sis, FT-IR spectroscopy and BET analysis was used as an adsorbent in a series of bath adsorption experiments for the removal of Hg（ Ⅱ ） from aqueous solutions. The maximum adsorption capacity of Hg（ Ⅱ ） was up to 344 mg/ g resin with pH 7 at room temperature. The kinetic experiments exhibited that the adsorption reached the adsorp-tion equilibrium in 240 min. The adsorption process can be well described by the pseudo-second-order kinetic model and the equilibrium adsorption isotherm was closely fitted with the Langmuir model.

关 键 词：螯合树脂 功能化 吸附 汞 

分 类 号：X703.1[环境科学与工程—环境工程]