Biosorption of Pb2+ by Deposited Saccharomyces Cerevisiae
Lead in environment often causes a serious health hazard. The removal of Pb2+ from aqueous phase is a beneficial project. In this paper, deposited Saccharomyces cerevisiae (S.c.) was chosen as adsorbent, Pb2+ ions as adsorbate, and the process of biosorption was studied. The dynamics of the adsorption was investigated. The adsorption mechanism of Pb2+ by S.c. cells was also investigated by detecting raicrostructure, zeta potential under different pH value, FT-IR spectra of the S.c. particles before and after biosorption.It was shown that the biosorption of Pb2+ by deposited S. c. is a rapid process, and the adsorbing equilibrium is reached within 10 minutes. The Zero point of zeta potential of S.c. cells is pH=3.3.When 2.0＜pH＜3.3, there exists biosorption (biosorption rate 76%～88%), which means static biosorption been not the only kind of biosorption. FT-IR spectrum analysis showed that groups on bacteria surface were mainly characteristic groups of protein and amylase; oxo-groups and nitric-groups on S.c. cell surface could chelate with heavy metal ions. Chemical adsorption might exist in the process.
Biosorption Pb2+ Saccharomyces cerevisiae
Y. M. Zhu X. J. Su X. W. Zhou D. Z. Wei
Northeastern University, Shenyang, China Guangxi University, Nanning, China
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3103-3107
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）