Biosorption of Cd, Zn and Cu by Sargassum sp. waste biomass

被引：74

作者：

Valdman E. ^{[1
]}

Leite S.G.F. ^{[1
]}

机构：

[1] Universidade Fed. do Rio de Janeiro, Escola de Química, Depto de Eng. Bioquimica - Cd. U.

来源：

Bioprocess Engineering | 2000年 / 22卷 / 2期

关键词：

Biomass; Cadmium; Alginate; Biosorption; Langmuir Model;

D O I：

10.1007/PL00009109

中图分类号：

学科分类号：

摘要：

Biosorption is becoming an important component in the integrated approach to the treatment of aqueous effluents. The economics of biomass technical applications are improved by using waste biomass instead of purposely-produced biomass. Biomass derived from an alginate extraction industry - Sargassum sp. - was examined for its ability to function as a biosorbent for metals such as cadmium, zinc and copper. For use in column applications, biomass should be immobilized. To the algae reinforcement, the biomass was embedded in polyethleneimine (PEI), followed by glutaraldehyde crosslinking. Equilibrium Zn and Cu isotherms were analysed using the immobilization ratio that showed the best Cd performance. Either Freundlich or Langmuir models can describe the passive biosorption equilibrium of cadmium, zinc and cooper. The preference for this series of metals by the biomass was found to be Cd > Zn > Cu, with maximum uptake values of 157.8, 118.5 and 77.4 mg/g dry weight biomass for Cd, Zn and Cu. respectively. The metal binding capacity by nonliving biomass is an important quality for industrial use.

引用

页码：171 / 173

页数：2

共 9 条

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