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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
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.
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页码:421 / 428
页数:8
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