改性果胶-Fe3O4磁性微球制备及对Pb2+吸附性能  

Preparation of modified Fe3O4-pectin magnetic microspheres and its adsorption property for Pb2+

作　　者：胡冬婉 马占玲[1,2] 马骁 励建荣 Hu Dongwan;Ma Zhanling;Ma Xiao;Li Jianrong(College of Chemistry and Chemical Engineering,Bohai University,Jinzhou 121013;Food Safety Key Lab of Liaoning Province)

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

出　　处：《无机盐工业》2020年第6期24-29,共6页Inorganic Chemicals Industry

基　　金：“十二五”国家支撑计划项目课题(2012BAD29B06)。

摘　　要：合成了一种琥珀酸酐改性果胶-四氧化三铁(Fe3O4)磁性微球吸附剂,分别采用扫描电镜(SEM)、红外光谱(FT-IR)、X射线衍射(XRD)等手段对样品进行了表征,并研究了其吸附铅离子(Pb2+)的性能。研究结果表明:成功制备了琥珀酸酐改性果胶-Fe3O4磁性微球,改性果胶包覆四氧化三铁几乎没有改变Fe3O4的尖晶石结构,其表面疏松多孔;改性果胶-Fe3O4磁性微球对铅离子的吸附符合准二级动力学方程、Langmuir等温吸附方程,吸附过程主要为化学吸附。最佳吸附条件:吸附时间为600 min,吸附温度为40℃,溶液pH为5,吸附剂添加量为20 mg,溶液中Pb2+质量浓度为800 mg/L。改性果胶-Fe3O4磁性微球吸附剂用于脱除毛蚶子、扇贝酶解液中的Pb2+,Pb2+去除率分别为76.47%和80.34%,效果良好。A new magnetic microspheres adsorbent of pectin modified by succinic anhydride was synthesized.The samples were characterized by means of SEM,FT-IR and XRD.The effects of the adsorbent adsorbing Pb2+were investigated.The experimental results showed that the magnetic microspheres of succinic anhydride modified pectin-Fe3O4were prepared successfully.The modified pectin coated Fe3O4 hardly changed the original structure of Fe3O4 spinel,and its surface became loose and porous and the adsorption of lead ions by the novel magnetic microspheres with succinic anhydride modified pectin was characterized by pseudo-second-order kinetic and Langmuir isothermal adsorption equation and the adsorption process was mainly chemical adsorption.The optimal conditions were as follows:adsorption time of 600 min,the temperature of 40 ℃,the pH=5,the adsorption dosage of 20 mg,and the solution Pb2+mass concentration of 800 mg/L.The adsorbent was used to remove Pb2+from the enzymatic hydrolysate of tegillarca granosa and scallop,with the removal rates of 76.47% and 80.34%,respectively.The effect is good.

关 键 词：改性果胶-Fe3O4磁性微球 琥珀酸酐 吸附 

分 类 号：TQ138.11[化学工程—无机化工]