LSC-100树脂吸附铅(Ⅱ)的研究  

Study on the Adsorption of LSC-100 Resin for Pb(Ⅱ)

作　　者：莫建军[1] MO Jianjun(Faculty of Ecology,Lishui University,Lishui 323000,Zhejiang)

机构地区：[1]丽水学院生态学院,浙江丽水323000

出　　处：《丽水学院学报》2021年第5期21-25,共5页Journal of Lishui University

摘　　要：采用LSC-100树脂对铅离子吸附进行研究。在HAc-NaAc体系中pH=4.6时吸附最佳。此时,测得静态饱和吸附容量为589 mg·g-1;表观吸附速率常数k298=5.64×10-2s-1;等温吸附服从Langmuir和Freundlich经验式;吸附热力学参数ΔH=13.81 kJ·mol-1,ΔG=-4.98 kJ·mol-1,ΔS=63.05 J·mol-1·K-1。当体系中存在HCl和CdCl2时树脂的吸附量减少,而存在MgCl2和NaCl时吸附量基本没影响;用0.5 mol·L-1HCl作解吸剂,解吸率为98%。The sorption of Pb(Ⅱ)with LSC-100 resin is investigated.LSC-100 resin has a good sorption ability for Pb(Ⅱ)in the HAc-NaAc medium at pH=4.6.The statically saturated sorption capacity is 589 mg/g resin.The sorption rate constant is k298=5.64×10-2s-1.The adsorption behavior of 110 resin for Pb(Ⅱ)obeys the Langmuir and Freundlich isotherm.The sorption thermodynamic parameters of LSC-100 resin for Pb(Ⅱ)are enthalpy changeΔH=13.81kJ·mol-1,free energy changeΔG=-4.98 kJ·mol-1,entropy changeΔS=63.05 J·mol-1·K-1,respectively.HCl and CdCl2 made the adsorption quantity of LSC-100 resin acutely decrease,while MgCl2 and NaCl made the adsorption quantity of LSC-100 resin almost had no influence.0.5 mol·L-1 HCl can be used as an eluant and The elution percentage is 98%.

关 键 词：LSC-100树脂 铅(Ⅱ) 吸附 介质 

分 类 号：O614.611[理学—无机化学]