纳米伊/蒙黏土去除微污染水体中Cd^(2+)、Tl^+的特性分析  

ADSORPTION PROPERTIES OF Cd^(2+)、Tl^+ IN MICRO-POLLUTED WATER BY NANO ILLITE/SMECTITE CLAY

作　　者：喻浈 邓超冰 冼萍 王晓飞 尹娟[3,4] YU Zhen;DENG Chao-bing;XIAN Ping;WANG Xiao-fei;YIN Juan(School of Resources,Environment and Materials,Guangxi University,Nanning 530004,China;Guangxi Zhuang Autonomous Region Environmental Monitoring Center,Nanning 530028,China;College of Light Industry and Food Engineering,Guangxi University,Nanning 530004,China;College of Management Science and Engineering,Guangxi University of Finance and Economics,Nanning 530003,China)

机构地区：[1]广西大学资源环境与材料学院,南宁530004 [2]广西壮族自治区环境监测中心站,南宁530028 [3]广西大学轻工与食品工程学院,南宁530004 [4]广西财经学院管理科学与工程学院,南宁530003

出　　处：《环境工程》2018年第7期6-10,16,共6页Environmental Engineering

基　　金：广西自然科学基金重大项目(2013GXNSFEA053001);广西自然科学基金重大项目(2015GXNSFEA139001)

摘　　要：以纳米伊/蒙黏土为吸附材料,探索其去除微污染水体中Cd^(2+)、Tl^+的特性。结果表明,纳米伊/蒙黏土对Cd^(2+)、Tl^+的吸附行为高度拟合准二级动力学模型,吸附等温曲线符合Langmuir方程,热力学参数表明该过程是熵增加的物理吸附过程。当不调节pH值,室温下纳米伊/蒙黏土添加量为7.5 g/L时,可使Cd^(2+)、Tl^+初始浓度分别为0.10,0.002 mg/L的水体达到GB 3838—2002《地表水环境质量标准》Ⅲ类水体规定的限值,吸附平衡时间为15 min。纳米伊/蒙黏土添加量为10.0 g/L可使Cd^(2+)、Tl^+初始浓度分别为0.20,0.004 mg/L的水体实现达标排放。The nano illite/smectite（ I/S） clay,as an adsorbent,was used to adsorb Cd（2＋）and Tl＋in micro-polluted water,and the adsorption properties of Cd（2＋）and Tl＋by nano I/S clay was investigated. The results showed that,the adsorption course with nano I/S clay highly fit pseudo-second order kinetic equation,the Langmuir model presented better fit for the adsorption equilibrium. Meanwhile,the thermodynamic parameters revealed that the adsorption process was a physical process with the increasing of entropy. At the condition that pH was neutral and the dosage of nano I/S clay was 7. 5 g/L,the solution containing 0. 1 mg/L Cd（2＋）and 0. 002 mg/L Tl＋could reach ＂Environmental Quality Standards for Surface Water ＂（ GB3838—2002） at room temperature,the reaction reached equilibrium in only 15 min. Moreover,the solution containing 0. 20 mg/L Cd（2＋）and 0. 004 mg/L Tl＋could reach the standard when adding nano I/S clay of 10. 0 g/L.

关 键 词：纳米伊/蒙黏土 吸附 Cd2+ Tl+ 微污染 

分 类 号：X52[环境科学与工程—环境工程]