SCI和EI收录∣中国化工学会会刊

›› 2011, Vol. 19 ›› Issue (2): 334-339.

• • 上一篇    下一篇

Biosorption of Pb2+ with Modified Soybean Hulls as Absorbent

李嘉, 陈恩赞, 苏海佳, 谭天伟   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • 收稿日期:2010-04-20 修回日期:2011-01-21 出版日期:2011-04-28 发布日期:2011-04-28
  • 通讯作者: SU Haijia,E-mail:suhj@mail.buct.edu.cn
  • 基金资助:
    Supported by the National Natural Science Foundation of China(20876008,21076009);the National Basic Research Program of China(2007CB714305);the National High Technology Research and Development Program of China(2006AA020101);Chinese Universities Scientific Fund(ZZ1024)

Biosorption of Pb2+ with Modified Soybean Hulls as Absorbent

LI Jia, CHEN Enzan, SU Haijia, TAN Tianwei   

  1. State Key Laboratory of Chemical Resource Engineering, Beijing University of Chemical Technology, Beijing 100029, China
  • Received:2010-04-20 Revised:2011-01-21 Online:2011-04-28 Published:2011-04-28
  • Supported by:
    Supported by the National Natural Science Foundation of China(20876008,21076009);the National Basic Research Program of China(2007CB714305);the National High Technology Research and Development Program of China(2006AA020101);Chinese Universities Scientific Fund(ZZ1024)

摘要: Using soybean hull residue after the soluble dietary fiber being removed during the soybean processing industry as crude material,a novel absorbent,modified soybean hulls,is prepared.Its adsorption behavior for Pb2+ is studied.The adsorbent has a large and efficient adsorption capacity for Pb2+,up to 20% of the mass of dry ad-sorbent.Its maximum adsorption capacity for Pb2+ reaches 217 mg·g-1 at initial Pb2+ concentration of 2000 mg·L-1,which is twice that of yeast absorbent and threefold greater than that of chitosan absorbent.The adsorption ability is sensitive to pH value in the solution and the optimal pH for adsorption of Pb2+ is 7.0.In the presence of other metal ions (Ca2+,Mg2+ and Na+) in the solution,their effect on the adsorption capacity for Pb2+ is not obvious.After 5 cycles of adsorption,80% adsorption capacity of Pb2+ is maintained.Compared with various available commercial resins,the modified soybean hulls are a plentiful,inexpensive and effective medium for the capture of dissolved Pb2+ from waste streams.

关键词: biosorption, Pb2+, soybean hulls, desorption, wastewater

Abstract: Using soybean hull residue after the soluble dietary fiber being removed during the soybean processing industry as crude material,a novel absorbent,modified soybean hulls,is prepared.Its adsorption behavior for Pb2+ is studied.The adsorbent has a large and efficient adsorption capacity for Pb2+,up to 20% of the mass of dry ad-sorbent.Its maximum adsorption capacity for Pb2+ reaches 217 mg·g-1 at initial Pb2+ concentration of 2000 mg·L-1,which is twice that of yeast absorbent and threefold greater than that of chitosan absorbent.The adsorption ability is sensitive to pH value in the solution and the optimal pH for adsorption of Pb2+ is 7.0.In the presence of other metal ions (Ca2+,Mg2+ and Na+) in the solution,their effect on the adsorption capacity for Pb2+ is not obvious.After 5 cycles of adsorption,80% adsorption capacity of Pb2+ is maintained.Compared with various available commercial resins,the modified soybean hulls are a plentiful,inexpensive and effective medium for the capture of dissolved Pb2+ from waste streams.

Key words: biosorption, Pb2+, soybean hulls, desorption, wastewater