改性木质素对PtCl _6^(2-)的吸附性能  

Adsorption Properties of Modified Lignin on PtCl _6^(2-)

作　　者：张保平[1,2] 郭美辰[1,2] 刘运[1,2] 沈博文 ZHANG Bao-ping;GUO Mei-chen;LIU Yun;SHEN Bo-wen(The State Key Laboratory of Refractories and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081;Key Laboratory of Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan 430081, China)

机构地区：[1]武汉科技大学省部共建耐火材料与冶金国家重点实验室,武汉430081 [2]武汉科技大学钢铁冶金及资源综合利用省部共建教育部重点实验室,武汉430081

出　　处：《有色金属（冶炼部分）》2018年第4期60-64,共5页Nonferrous Metals（Extractive Metallurgy)

基　　金：第47批教育部留学回国人员科研启动基金资助项目;钢铁冶金及资源综合利用省部共建教育部重点实验室开放基金资助项目(FMRU201203)

摘　　要：以季铵型木质素和季铵型鳌合木质素为吸附剂,研究了吸附时间、PtCl _6^(2-)初始浓度对PtCl _6^(2-)吸附效果的影响,考察了盐酸浓度对PtCl _6^(2-)吸附选择性的影响规律,探究了吸附过程的动力学方程和等温吸附特性。结果表明,季铵型木质素吸附平衡时间和饱和吸附容量分别为300min和67.90mg/g,季铵型鳌合木质素吸附平衡时间和饱和吸附容量为120 min和218.8 mg/g;两种改性木质素在盐酸浓度为1.0mol/L时,对PtCl _6^(2-)均具有很好的吸附选择性,且盐酸浓度越低吸附选择性越好;动力学均遵循准二级方程,等温吸附模型均与朗缪尔方程拟合较好,吸附过程均为单分子层均质化学吸附。Effects of adsorption time and initial concentration of PtCl 6^2- on absorptivity of PtCl 6^2- were investigated applying quaternary ammonium lignin and quaternary ammonium chelated lignin as adsorbent.Effect of hydrochloric acid concentration on adsorptive selectivity of PtCl 6^2- was studied.Kinetic equations and adsorption isotherms of adsorption process were explored.The results show that equilibrium adsorption time and saturation adsorption capacity are 120 min and 67.90 mg/g for quaternary ammonium lignin.Equilibrium adsorption time and saturation adsorption capacity are 300 min and 218.75 mg/g for quaternary ammonium chelated lignin.Adsorption selectivity of PtCl 6^2- is satisfactory when concentration of hydrochloric acid is 1.0 mol/L,and selectivity rises along with drop of hydrochloric acid concentration.Adsorption of PtCl 6^2- on modified lignins is in accordance with pseudo-second-order equation and Langmuir isothermal adsorption equation,and is of chemical single molecule layer adsorption.

关 键 词：改性木质素 PTCL 6^2- 吸附性能 

分 类 号：TF833[冶金工程—有色金属冶金]