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Fixation of heavy metals onto lignocellulosic sorbent prepared from paddy straw

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Title Fixation of heavy metals onto lignocellulosic sorbent prepared from paddy straw
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Creator Krishnani K
Xiaoguang Meng and
Veera M. Boddu
 
Subject fixation
mechanism
heavy metals and
paddy straw
 
Description Not Available
The sorption behavior of biosorbent prepared from paddy straw with nine different heavy metals has been studied. The binding mechanisms involving adsorption and the cation-exchange process have also been investigated. Characterization of biosorbent through a scanning electron microscope revealed no major surface deformity resulting from the chemical treatment. X-ray photo electron spectroscopy was also used to determine the presence of exchangeable cations in the sorbent and the speciation of bound chromium, cadmium, and mercury. The maximum sorption capacity (millimoles/gram) obtained from the Langmuir model for Pb21, Cd21, Hg21, Co21, Ni21, Mn21, Zn21, and Cu21 were 0.286, 0.147, 0.226, 0.181, 0.196, 0.189, 0.219, and 0.248, respectively. Interpretation of Dahlquist (1978) and Scatchard (1949) was also used for the binding site
heterogeneity. The unique ability of the biosorbent to bind nine different metals has been attributed to the presence of surface heterogeneity and Ca21ions, which attract and sequester metal ions. Biosorption results are useful for the development of low-cost biosorbent. Water Environ. Res., 80, 2165 (2008).
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Date 2020-12-03T10:30:36Z
2020-12-03T10:30:36Z
2008-11-01
 
Type Article
 
Identifier Not Available
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http://krishi.icar.gov.in/jspui/handle/123456789/42901
 
Language English
 
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Publisher Not Available