固载离子液体材料的制备及其对水环境中汞离子的去除  

Preparation of Immobilized Ionic Liquid and Removal of Mercury Ions in Water

作　　者：邹文清 何松珉 ZOU Wenqing;HE Songmin(Hainan Lvjing High-tech Environmental Protection Co Ltd,Haikou 570311,Hainan,China)

机构地区：[1]海南绿境高科环保有限公司,海南海口570311

出　　处：《矿冶工程》2024年第1期161-165,共5页Mining and Metallurgical Engineering

摘　　要：采用浸渍法将咪唑基离子液体固载于磁性纳米颗粒表面,制备得到固载离子液体复合材料Fe_(3)O_(4)@SiO_(2)@IL。采用Fe_(3)O_(4)@SiO_(2)@IL去除水环境中的Hg^(2+),研究了pH值、吸附时间、吸附剂用量及Hg^(2+)初始浓度对Hg^(2+)去除率的影响。结果表明,Fe_(3)O_(4)@SiO_(2)@IL适用pH值范围宽,pH=7.2~9.5时,Hg^(2+)去除率达99.1%以上。Fe_(3)O_(4)@SiO_(2)@IL对Hg^(2+)的吸附速度快,只需90 min即可达到吸附平衡。对于25 mL浓度2μg/mL的Hg^(2+)溶液,加入20 mg吸附剂即可基本去除其中Hg^(2+),Fe_(3)O_(4)@SiO_(2)@IL的吸附等温线研究结果表明,吸附剂对Hg^(2+)的饱和吸附量为548.37 mg/g。Fe_(3)O_(4)@SiO_(2)@IL was prepared by immobilizing imidazole based ionic liquids on the surface of magnetic nanoparticles with impregnation method,and was then used to remove Hg^(2+)in the water.The effects of pH value,adsorption time,and adsorbent dosage on the Hg^(2+)removal rate were investigated.The results show that Fe_(3)O_(4)@SiO_(2)@IL can have a wide application,and Hg^(2+)removal rate can exceed 99.1%with pH of 7.2-9.5.Fe_(3)O_(4)@SiO_(2)@IL presents a high rate of Hg^(2+)adsorption,and the adsorption can reach equilibrium within 90 minutes.For 25 mL Hg^(2+)solution with a concentration of 2μg/mL,Hg^(2+)can be completely removed by adding 20 mg of adsorbent.The adsorption isotherms of Fe_(3)O_(4)@SiO_(2)@IL indicate that the saturated adsorption capacity of the adsorbent for Hg^(2+)is 548.37 mg/g.

关 键 词：固载离子液体 磁性纳米颗粒 咪唑 汞离子 吸附 静电作用 

分 类 号：TB333[一般工业技术—材料科学与工程] X703[环境科学与工程—环境工程]