Biosorption of Cu(II), Pb(II), Ni(II), and Fe(II) on Alkali Treated Coir Fibers

被引：30

作者：

Shukla, Pushkar M. ^{[1
]}

Shukla, Sanjeev R. ^{[1
]}

机构：

[1] Inst Chem Technol, Dept Fibers & Text Proc Technol, Bombay 400019, Maharashtra, India

来源：

SEPARATION SCIENCE AND TECHNOLOGY | 2013年 / 48卷 / 03期

关键词：

biosorption; coir; heavy metals; Langmuir isotherm; ADSORPTION;

D O I：

10.1080/01496395.2012.691933

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Batchwise adsorption of Cu(II), Pb(II), Ni(II) and Fe(II) ions on coconut coir was studied. Coir fiber was subjected to alkali treatment (18% (w/v) NaOH) in order to enhance its metal adsorption capacity and rate of uptake. The maximum metal ion uptake capacity of Cu(II), Pb(II), Ni(II), and Fe(II) on alkali treated coir increased by nearly 3 times to 9.43, 29.41, 8.84, and 11.11 mg g-1, respectively. The solution pH played a crucial role in metal adsorption and the optimum pH for maximum adsorption was found to be different for each metal ion. The adsorption followed pseudo second-order kinetics and the isotherm data fits to the Langmuir adsorption isotherm. Repeated desorption-adsorption cycles explored the potential of reuse of alkali treated coir fibers upto 3 times with negligible loss of adsorption capacity.

引用

页码：421 / 428

页数：8

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