改性SiO2气凝胶用于改善渭河咸阳段重金属吸附性能研究  

Study on Improving the Adsorption Properties of Heavy Metals in Xianyang Section of Weihe River by Hydrophobic Aerogels

作　　者：刘静[1] 李跃 李逸云 王洁 王晓芳[1] 王珊[1] LIU Jing;LI Yue;LI Yiyun;WANG Jie;WANG Xiaofang;WANG Shan(School of Chemistry and Chemical Engineering,Xianyang Normal University,Xianyang 712000,Shaanxi,China)

机构地区：[1]咸阳师范学院化学与化工学院,陕西咸阳712000

出　　处：《咸阳师范学院学报》2020年第2期40-43,共4页Journal of Xianyang Normal University

基　　金：咸阳市科研攻关项目(2016K02-15);咸阳师范学院大学生创新创业训练计划项目(2019111)。

摘　　要：采用火焰原子吸收光谱法,分析了改性SiO2气凝胶用于改善渭河咸阳段水中微量重金属含量的吸附性能。结果表明,改性SiO2气凝胶对水中微量重金属Cu^2+具有一定的吸附能力。室温下,当气凝胶用量为0.080 0 g,搅拌速率为200 r·min^-1,吸附时间为30 min,体系pH为4.2时,疏水气凝胶对Cu^2+吸附率最大,达到99.0%,残余Cu^2+浓度为0.005 mg·L^-1。气凝胶对Cu^2+吸附机理符合Langmuir吸附模型。The adsorption performance of hydrophobic silica aerogel to improve the content of trace heavy metals in xianyang section of Weihe River was analyzed by flame atomic absorption spectrometry.The results showed that the hydrophobic aerogel had a certain adsorption capacity to the trace heavy metals Cu^2+in water.At room temperature,when the aerogel dosage was 0.080 0 g,the stirring rate was 200 r/min-1,the adsorption time was 30 min,the system p H was 4.2,the hydrophobic aerogel had the highest adsorption rate of Cu^2+,reaching 99.0%,and the residual Cu^2+concentration was 0.005mg L-1.The adsorption mechanism of aerogel on Cu^2+conforms agrees with Langmuir adsorption model.

关 键 词：疏水气凝胶 重金属 吸附性能 

分 类 号：X703.1[环境科学与工程—环境工程]