Biosorption of toxic metals: The potential use of maize tassel for the removal of Pb (II) from aqueous solutions

被引：0

作者：

Zvinowanda, Caliphs M. ^{[1
]}

Okonkwo, Jonathan O. ^{[1
]}

Mpangela, Victoria ^{[1
]}

Phaleng, Josephine ^{[1
]}

Shabalala, Pride N. ^{[1
]}

Dennis, Teresa ^{[1
]}

Forbes, Patricia ^{[2
]}

Agyei, Nana M. ^{[3
]}

Ozoemena, Kenneth I. ^{[4
]}

机构：

[1] Tshwane Univ Technol, Fac Sci, Dept Environm Water & Earth Sci, ZA-0001 Pretoria, South Africa

[2] CSIR, NRE, ZA-0001 Pretoria, South Africa

[3] Univ Limpopo, Dept Chem, ZA-0204 Medunsa, Pretoria, South Africa

[4] Univ Pretoria, Dept Chem, Mol & Nanomat Electrochem Lab, ZA-0002 Pretoria, South Africa

来源：

FRESENIUS ENVIRONMENTAL BULLETIN | 2008年 / 17卷 / 7A期

关键词：

diffusion; batch adsorption procedure; influence of pH; contact time;

D O I：

暂无

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

In this study, we show for the first time the removal of Pb(II) from aqueous solutions by tassel powder. Batch experiments were conducted on tassel powder, and the effects of contact time, pH, temperature and concentration on the extent of Pb(II) removal studied. The highest adsorption (about 80 %) was at pH 7, and equilibrium was established between contact times 4-24 h. Adsorption of 5 mg/L Pb(II) standard concentration was rapid suggesting that adsorption may have been controlled by external diffusion. When increasing the concentration from 10-20 mg/L, the controlling step of adsorption was suggested to be that of internal diffusion.

引用

页码：814 / 818

页数：5

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