磁性海青菜生物吸附剂的制备及性质表征  

Preparation and characterization of magnetical Ulva lactuca-based biosorbents

作　　者：李小娟[1] 汤帆[1] 汤端莲 林萍[1] 刘明华[1] 

机构地区：[1]福州大学环境与资源学院,福建福州350116

出　　处：《福州大学学报（自然科学版）》2014年第3期474-479,共6页Journal of Fuzhou University(Natural Science Edition)

基　　金：福建省自然科学基金资助项目(2012J05023);福建省教育厅科研资助项目(JA10051)

摘　　要：以海青菜和纳米Fe3O4作为原材料,采用戊二醛交联法和海藻酸钙包埋法制备了磁性海青菜生物吸附剂,优化了制备条件,并利用FESEM、XRD、FTIR和自动电位滴定仪对磁性生物吸附剂的结构和性能进行表征.结果表明:戊二醛交联法和海藻酸钙包埋法均能成功实现海青菜与Fe3O4的复合,且所得磁性生物吸附剂都能在外加磁场作用下实现简单分离;最优制备条件下所得的交联磁性海青菜生物吸附剂和包埋磁性海青菜生物吸附剂对结晶紫的吸附容量分别为350.8和679.3 mg·g-1;磁性海青菜生物吸附剂表面的主要官能团有羧基、磷酸基、氨基和羟基.Magnetical Ulva lactuca -based biosorbents were prepared by combining Ulva lactuca and nano -Fe304 using glutaraldehyde cross -linking method and calcium -alginate immobilized method. The preparation conditions were optimized and the magnetic biosorbents were characterized by FESEM, XRD, RTIR and Automatic Potentiometric Titrimeter. The results showed that Ulva lactuca and nano - Fe304 can be successfully hybrid using both methods and the prepared magnetic biosor- bents can be easily separated by an external magnetic field. The adsorption capacities of crystal violet on the glutaraldehyde cross - linking magnetic biosorbents and calcium - alginate immobilized magnetic biosorbents were 350.8 and 679.3 mg· g-1, respectively. The main functional groups on the magnetic biosorbents were carboxyl, phosphonate, amine and hydroxyl groups.

关 键 词：海青菜 生物吸附剂 磁性 包埋法制备 

分 类 号：TQ050.4[化学工程]