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http://dx.doi.org/10.5338/KJEA.2009.28.2.158

Adsorption Characteristics of Heavy Metal Ions onto Chemically Modified Rice Husk and Sawdust from Aqueous Solutions  

Lee, Hyeon-Yong (College of Agriculture and Life Sciences, Kangwon National University)
Jeon, Choong (Department of Environmental & Applied Chemical Engineering, Kangnung-Wonju National University)
Lim, Kyoung-Jae (College of Agriculture and Life Sciences, Kangwon National University)
Hong, Ki-Chan (College of Agriculture and Life Sciences, Kangwon National University)
Lim, Jung-Eun (College of Agriculture and Life Sciences, Kangwon National University)
Choi, Bong-Su (College of Agriculture and Life Sciences, Kangwon National University)
Kim, Nam-Won (Korea Institute of Construction Technology)
Yang, Jae-E (College of Agriculture and Life Sciences, Kangwon National University)
Ok, Yong-Sik (College of Agriculture and Life Sciences, Kangwon National University)
Publication Information
Korean Journal of Environmental Agriculture / v.28, no.2, 2009 , pp. 158-164 More about this Journal
Abstract
Biosorption uses adsorbents derived from non-living biomass and removes toxic metals from industrial wastewater. The objective of this research was to evaluate the potential of low cost biosorbents to remove heavy metal ions (Cd, Cu, Pb and Zn) from aqueous solutions using chemically modified rice husk and saw dust (Pseudotsuga menziesi, Quercus, Populus). Batch-type adsorption experiments were carried out using rice husk and saw dust treated with NaOH and/or tartaric acid in artificial wastewater 100 mg metal/L). The experimental results showed that the adsorption specificity of each biosorbent was Pb > Cu > Cd > Zn irrespective of the types of biosorbents. The adsorption capacity of Pb and Cu onto NaOH-treated sawdust was increased 2${\sim}$3 times compared to the untreated one. In addition, the tartaric acid treatment increased the adsorption capacity of rice husk for Zn and Cd approximately 5${\sim}$10 fold compared to the untreated one. Surface conditions and changes in functional groups by chemical modification of each biosorbent were confirmed by SEM and FT-IR. Overall, the results show that chemical modification increases the metal removal capacity of rice bran and sawdust.
Keywords
Adsorption; Heavy metal ions; Biosorbent; Biosorption; Rice husk; Sawdust;
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Times Cited By KSCI : 5  (Citation Analysis)
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