会议论文

Effect of ionic strength on the adsorption of Pb2+ and Cu2+ onto BLPAMA

中文

2015

55-64

2015全国功能高分子行业委员会、水溶性聚合物产业技术创新战略联盟年会暨技术研讨会

2015全国功能高分子行业委员会、水溶性聚合物产业技术创新战略联盟年会暨技术研讨会论文集

2015-10-01

南昌

全国功能高分子行业委员会<&wdkj&>水溶性聚合物产业技术创新战略联盟

本校为第一机构

采用自制膨润土/木质素磺酸钠接枝丙烯酰胺-马来酸酐复合吸附树脂(BLPAMA),分别在有、无外加0.2mol L-1NaNO3的二元Pb(NO3)2/Cu(NO3)2溶液中研究了溶液离子强度对BLPAMA吸附Pb2+和Cu2+的影响.结果表明:对Pb2+的吸附,溶液离子强度的增加降低了Pb2+的吸附量及吸附吉布斯自由能变、焓变和熵变,提高了吸附活化能;而对Cu2+的吸附,溶液离子强度的增加提高了Cu2+的吸附量以及吸附焓变和熵变,降低了吸附活化能和吉布斯自由能变.

　　The self-made adsorbent composites comprising of bentonite/sodium lignosulfonate graft-polymerized with acrylamide and maleic anhydride(BLPAMA)were used to investigate the effect of ionic strength on the adsorption of Pb2+ and Cu2+ onto BLPAMA with and without 0.2 mol L-1 NaNO3 in Pb(NO3)2/Cu(NO3)2 binary metal ion solution.Results have shown that the increase of ionic strength decreased the adsorption capacity of Pb2+,the change of Gibbs free energy,enthalpy and entropy,and increased the activation energy of Pb2+ adsorption.On the contrary...