A new efficient forest biowaste as biosorbent for removal of cationic heavy metals

Among various forest biowastes, chestnut bur had the highest uptake values of Cd(II) and Pb(II), and these values were higher than those of agricultural biowastes used as comparable biosorbents. This study is the first report showing the high potential of chestnut bur as biosorbent for the removal o...

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Bibliographic Details
Published in:Bioresource technology 2015-01, Vol.175, p.629-632
Main Authors: Kim, Namgyu, Park, Munsik, Park, Donghee
Format: Article
Language:English
Subjects:
Adsorption
Cadmium - chemistry
Cadmium - isolation & purification
Cationic
Cations
Chestnut
Fagaceae - chemistry
Forestry
Forests
Heavy metals
Hydrogen-Ion Concentration
Isotherms
Kinetics
Lead - chemistry
Lead - isolation & purification
Mathematical analysis
Mathematical models
Pinus - chemistry
Plant Bark - chemistry
Republic of Korea
Spectroscopy, Fourier Transform Infrared
Uptakes
Waste Products
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Summary:Among various forest biowastes, chestnut bur had the highest uptake values of Cd(II) and Pb(II), and these values were higher than those of agricultural biowastes used as comparable biosorbents. This study is the first report showing the high potential of chestnut bur as biosorbent for the removal of cationic heavy metals. Pseudo-second-order equation satisfactorily described the biosorption behaviors of both metals. Biosorption rate of Pb(II) was 3.12 times higher than that of Cd(II). Langmuir model could fit the equilibrium isotherm data better than Freundlich model. The maximum uptake capacities of Cd(II) and Pb(II) were determined to be 34.77mg/g and 74.35mg/g, respectively. FTIR study showed that carboxyl group on the biosorbent was involved in biosorbing the cationic metals. In conclusion, abundant and cheap forest biowastes, especially chestnut bur, is a potent candidate for efficient biosorbent capable of removing toxic heavy metals from aqueous solutions.
ISSN:0960-8524
1873-2976
DOI:10.1016/j.biortech.2014.10.092