Environmentally friendly separation of heavy-metal ions onto porous chitosan beads

被引:0
|
作者
Kim, TY
Kim, SJ
Yang, JH
Cho, SY [1 ]
机构
[1] Chonnam Natl Univ, Dept Environm Engn, Kwangju 500757, South Korea
[2] Chonnam Natl Univ, Dept Chem Engn, Kwangju 500757, South Korea
关键词
chitosan; separation; heavy-metal ions; fixed bed;
D O I
暂无
中图分类号
O6 [化学];
学科分类号
0703 ;
摘要
Chitin and chitosan, which are found in crustacea, mollusca, and fungus, are natural polymers. The average molecular weight and the degree of deacetylation of the chitosan used were found to be 8.2 X 10(5) and 85%, respectively. The chitosan solution was prepared by dissolving chitosan powder into a 2 wt% aqueous acetic acid solution. Sodium hydroxide solution was used as a gelation agent. Spherical chitosan beads for of fixed-bed experiments were made by the sol-gel method. Single-component isotherms Cu2+ and Cd2+ fit well with the Sips isotherm. The adsorption behavior in a fixed-bed was observed in terms of the flow rates for single-and binary-component systems. The adsorption affinity Of Cu2+ onto chitosan beads is larger than that of Cd2+ In the binary system, the breakthrough data of the lower-selectivity ion showed an excess concentration; the exit concentration is higher than the initial concentration at the inlet. Intraparticle diffusion is explained by the pore diffusion mechanism. Adsorption dynamics of Cu2+ and Cd2+ in a fixed- bed can be simulated by LDFA (linear driving force approximation).
引用
收藏
页码:201 / 207
页数:7
相关论文
共 50 条
  • [1] MICROPOROUS CHITOSAN BEADS FOR THE ADSORPTION OF HEAVY-METAL IONS
    WAY, JD
    RORRER, GL
    HSIEN, TY
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1992, 203 : 29 - IEC
  • [2] HEAVY-METAL UPTAKE BY SWOLLEN CHITOSAN BEADS
    MITANI, T
    MORIYAMA, A
    ISHII, H
    BIOSCIENCE BIOTECHNOLOGY AND BIOCHEMISTRY, 1992, 56 (06) : 985 - 985
  • [3] SEPARATION OF HEAVY-METAL IONS BY MEMBRANE SEPARATION METHODS
    SCHWARZ, HH
    SCHONER, HW
    HOLZAPFEL, G
    LINOW, K
    CHEMISCHE TECHNIK, 1980, 32 (07): : 384 - 384
  • [4] Removal of heavy-metal ion by adsorption on chitosan gel beads
    Lemrabet, E.
    Jaafari, K.
    Benkhouja, K.
    Touaiher, M.
    Bakasse, M.
    Sahraoui, B.
    Touhtouh, S.
    Soufiane, A.
    JOURNAL OF OPTOELECTRONICS AND ADVANCED MATERIALS, 2013, 15 (11-12): : 1298 - 1302
  • [5] SEPARATION OF HEAVY-METAL IONS WITH POLYSTYRENE EXCHANGERS
    GRIESBACH, M
    LIESER, KH
    FRESENIUS ZEITSCHRIFT FUR ANALYTISCHE CHEMIE, 1980, 302 (03): : 181 - 183
  • [6] CONCENTRATION OF HEAVY-METAL IONS BY USE OF POROUS MATERIALS
    HARA, T
    ENDO, T
    IKEDA, K
    ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1979, (APR): : 272 - 272
  • [7] CATION-EXCHANGE SEPARATION OF HEAVY-METAL IONS
    KAWAZU, K
    MATSUEDA, T
    KAKIYAMA, H
    JAPAN ANALYST, 1973, 22 (10): : 1301 - 1308
  • [9] Evaluation of magnetic chitosan beads for adsorption of heavy metal ions
    Fan, Chunzhen
    Li, Kan
    He, Yi
    Wang, Yalin
    Qian, Xufang
    Jia, Jinping
    SCIENCE OF THE TOTAL ENVIRONMENT, 2018, 627 : 1396 - 1403
  • [10] Adsorption of heavy-metal ions from aqueous solution onto chitosan-modified polyethylene terephthalate (PET)
    Yaolan Niu
    Diwen Ying
    Kan Li
    Yalin Wang
    Jinping Jia
    Research on Chemical Intermediates, 2017, 43 : 4213 - 4225