接枝交联淀粉黄原酸酯对Cd^(2+)的吸附性能研究  

Study on adsorption performance of grafted starch xanthate for Cd^(2+)

作　　者：李海花[1,2] 高玉华 郑玉轩[1] 李娜 张利辉 LI Hai-hua;GAO Yu-hua;ZHENG Yu-xuan;LI Na;ZHANG Li-hui(Institute of Energy Resources,Hebei Academy of Sciences,Shijiazhuang 050081,China;Hebei Technological Innovation Center for Water Saving in Industry,Shijiazhuang 050081,China;Hebei Sunwater Water Treatment Co.,Ltd.,Shijiazhuang 050081,China)

机构地区：[1]河北省科学院能源研究所,河北石家庄050081 [2]河北省工业节水技术创新中心,河北石家庄050081 [3]河北桑沃特水处理有限责任公司,河北石家庄050081

出　　处：《化学工程师》2023年第8期14-18,共5页Chemical Engineer

基　　金：河北省重点研发计划项目(21371201D)。

摘　　要：以交联淀粉(ISt)和丙烯酰胺(AM)为原料,通过接枝反应先合成接枝交联淀粉(ISA),ISA和CS2再在碱性条件下进行黄原酸化反应,合成接枝交联淀粉黄原酸酯(ISAX)。对ISAX的结构进行了表征,并测试了ISAX对Cd^(2+)的吸附性能。考察了投药量、Cd^(2+)初始浓度、吸附温度和吸附时间对吸附效果的影响,结果表明,当Cd^(2+)浓度为20mg·L^(-1)、投药量为300mg·L^(-1)、吸附温度为25℃、吸附时间为4h时,Cd^(2+)的去除率可达96.0%。吸附动力学拟合结果表明,吸附过程符合准二级动力学模型,为化学吸附;吸附等温线拟合结果表明,吸附过程符合Langumir模型,属于单分子层吸附。25℃时,拟合饱和吸附容量为52.97mg·g^(-1)。Graft cross-linked starch ISA was synthesized by grafting reaction with cross-linked starch(ISt)and acrylamide(AM)as raw materials,and then the grafted starch xanthate ISAX was obtained by xanthate acidification with ISA and CS2 under alkaline conditions.The structure of ISAX was characterized,and the adsorption performance of ISAX for Cd^(2+)was tested.The effects of dosage,initial concentration of Cd^(2+),adsorption temperature and adsorption time on adsorption were investigated.The results showed that when the concentration of Cd^(2+)was 20mg·L^(-1),the dosage was 300mg·L^(-1),the adsorption temperature was 25℃,and the adsorption time was 4h,the removal rate of Cd^(2+)could reach 96.0%.The fitting results of adsorption kinetics showed that the adsorption process was chemical adsorption,which was in accordance with the quasi second order kinetic model.The fitting results of adsorption thermodynamics showed that the adsorption process conformed to the Langumir model and belonged to monolayer adsorption.The saturated adsorption capacity fitted was 52.97mg·g^(-1)at 25℃.

关 键 词：交联淀粉 重金属离子 吸附 吸附机理 黄原酸酯 

分 类 号：X703.5[环境科学与工程—环境工程]