Removal of chromium (III) by using coal as adsorbent

被引：64

作者：

Anwar, Jamil ^{[2
]}

Shafique, Umer ^{[2
]}

Salman, Muhammad ^{[2
]}

Waheed-uz-Zaman ^{[2
]}

Anwar, Shafique ^{[3
]}

Anzano, Jesus M. ^{[1
]}

机构：

[1] Univ Zaragoza, Fac Sci, Dept Analyt Chem, Laser Lab & Environm, E-50009 Zaragoza, Spain

[2] Univ Punjab, Inst Chem, Lahore 54590, Pakistan

[3] Pakistan Council Sci & Ind Res, Mat Proc Res Ctr, Lahore, Pakistan

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2009年 / 171卷 / 1-3期

关键词：

Adsorption; Chromium; Coal; Langmuir isotherm; Freundlich isotherm; Temkin isotherm; ADSORPTION;

D O I：

10.1016/j.jhazmat.2009.06.076

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The adsorption of Cr(III) by two different coal varieties from Lakhra and Thar coalfields (Pakistan) have been studied in batch mode. The effect of adsorbent dose, pH, contact time and agitation speed on the adsorption of Cr(III) by both the coals were investigated. Adsorption equilibrium was achieved in 40-50 min. The Langmuir, Freundlich and Temkin adsorption isotherms were used to elucidate the observed sorption phenomena. The maximum Cr(III) removal was 2.61 mg of Cr(III) per gram of LC (Lakhra coal) and 2.55 mg of Cr(III) per gram of TC (Thar coal) as evaluated from Langmuir isotherm. The heat of sorption was in the range 3.75-3.87 kJ/mol as evaluated from Temkin isotherm. Best results were obtained at pH > 5. It is proposed that low rank coals of Pakistan can be used for removal of toxic metals like Cr(Ill) from industrial effluents/waste waters. (c) 2009 Elsevier B.V. All rights reserved.

引用

页码：797 / 801

页数：5

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