改性果胶-Fe_3O_4磁性微球的制备及对Cu^(2+)吸附性能研究  

Preparation of modified Fe_3O_4-pectin magnetic microspheres and its adsorption property for copper ions

作　　者：万峻菲 陈思[1] 贲楚璇 马占玲[1,2] 励建荣 WAN Jun-fei;CHEN Si;BEN Chu-xuan;MA Zhan-ling;LIJlan-rong(College of Chemistry and Chemical Engineering, Bohai University, Jinzhou 121013, China;Food Safety Key Lab of Liaoning Provinee,Jinzhou 121013, China)

机构地区：[1]渤海大学化学化工学院,辽宁锦州121013 [2]辽宁省食品安全重点实验室,辽宁锦州121013

出　　处：《化学研究与应用》2018年第5期765-772,共8页Chemical Research and Application

基　　金："十二五"国家支撑计划项目课题(2012BAD29B06)资助

摘　　要：采用氯化钙、环氧氯丙烷交联改性,制备了改性果胶磁性微粒,分别用红外光谱、扫描电镜、X-射线衍射对样品进行了表征并对实验条件进行了探究。实验结果表明:环氧氯丙烷改性果胶-Fe_3O_4微球吸附剂对Cu^(2+)有较好的吸附。该吸附符合准二级动力学方程,主要为化学吸附。当Cu^(2+)的初始浓度160 mg·L^(-1),吸附剂添加量为20 mg,反应时间为90 min,反应温度为60℃时的单位吸附量为74.89 mg·g^(-1)。研究还表明EDTA对磁性微球的洗脱效果最佳。环氧氯丙烷改性果胶-Fe_3O_4微球吸附剂对香螺、海螺和黄蚬子三种贝类的酶解液中Cu^(2+)进行脱除实验,去除率分别为85.1%,82.4%和83.5%,效果良好。An epiehlorohydrin modified peetin-Fe3O4 magnetic mierospheres was prepared by embednmnt techniques and character- ized by FT-IR,SEM, X-Ray diffraction. The effects of adsorption conditions, including initial metal ions concentration, adsorption time, adsorbent dosage and the value of pH on the adsorption efficiency for Cu^2＋ by modified magnetic pectin mierospheres absorb- ents were systemically investigated. The result shows that adsorption quantity- is 105 mg ·g^-1 under the adsorption conditions ：initial Cu^2＋ concentration 500 mg · L^-1, pH=4, adsorption temperature 25℃ ,adsorbent dosage 20 mg. The copper Ions in Enzymatic solu- tion of Conch,Neptunea cumingi, green willow clams were adsorbed with the adsorbent, the removal rate of Copper Ions is about 80%. The result is satisfactory.

关 键 词：改性果胶磁性微球 环氧氯丙烷 吸附 Cu^2+贝类 

分 类 号：O658.1[理学—分析化学]