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
收藏
页码：421 / 428
页数：8
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