电子废弃物中银的生物吸附研究  

Silver recovery from electronic waste by biosorption

作　　者：张思敬[1] 冯丽[1] 苗波波[1] 张耿[1] 

机构地区：[1]西安建筑科技大学理学院,陕西西安710055

出　　处：《应用化工》2011年第10期1699-1703,共5页Applied Chemical Industry

基　　金：陕西省教育厅专项科研项目(08JK322);西安建筑科技大学SSRT项目(2011-89)

摘　　要：研究了生物吸附剂壳聚糖和丝胶在单一Ag+体系、二组分体系(Ag+-Cu2+)及某废电路板四组分体系(Ag+-Cu2+-Zn2+-Ni2+)中对Ag+的吸附性能。结果表明,在单一Ag+溶液中,丝胶对Ag+的吸附容量(1.5 mmol/g)优于壳聚糖(0.9 mmol/g);在四组分体系(Ag+-Cu2+-Zn2+-Ni2+)中,壳聚糖和丝胶对Ag+具有选择性吸附,且壳聚糖选择性(SelAg=2.16)优于丝胶(SelAg=0.91)。吸附动力学研究表明,液膜扩散为吸附过程的主控步骤。Adsorption of silver from single component,binary components and four components from electronic waste was investigated using chitosan and silk sericin biosorbents.The results indicated that silk sericin had better adsorption capacity in single Ag＋ solution which was 1.5 mmol/g than that of chitosan 0.9 mmol/g.However,multi-components（Ag＋-Cu2＋ and Ag＋-Ni2＋-Cu2＋-Zn2＋） separations showed that chitosan had better selectivity than that of silk sericin.Adsorption kinetics revealed that film diffusion controlled mechanism of adsorption process.

关 键 词：电子废弃物 银 壳聚糖 丝胶 吸附 

分 类 号：TQ424.3[化学工程] O647.32[理学—物理化学]