Adsorption of zinc from aqueous solution using marine green algae -: Ulva fasciata sp.

被引:83
|
作者
Kumar, Y. Prasanna [1 ]
King, P. [1 ]
Prasad, V. S. R. K. [1 ]
机构
[1] Andhra Univ, AU Coll Engn, Dept Chem Engn, Environm Pollut Control Engn Lab, Visakhapatnam 530003, Andhra Pradesh, India
关键词
Ulva fasciata sp; adsorption; zinc; equilibrium studies; kinetic studies;
D O I
10.1016/j.cej.2006.10.023
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
The removal of zinc from aqueous solution by adsorption on Ulva fasciata sp. was studied as a function of contact time, pH of the solution, metal ion concentration, adsorbent concentration and adsorbent size. Batch experiments results showed that the adsorptive capacity of U. fasciata sp. was 13.5 mg/g of adsorbent. The Langmuir and Freundlich models were used to describe the adsorption equilibrium of zinc on U. fasciata sp. and the adsorption followed the Langmuir isotherm. The Langmuir and Freundlich constants for adsorption of zinc on U. fasciata sp. were determined. The pseudo first and second order rate expressions were used to correlate the experimental data. The kinetic constants were determined for both the models and the second order rate expression was found to be more suitable. (c) 2006 Elsevier B.V. All rights reserved.
引用
收藏
页码:161 / 166
页数:6
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