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Application of zerovalent iron impregnated chitosan-caboxymethyl-β-cyclodextrin composite beads as arsenic sorbent

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Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/54749

Title: Application of zerovalent iron impregnated chitosan-caboxymethyl-β-cyclodextrin composite beads as arsenic sorbent
Authors: Tajuddin Sikder, M. Browse this author
Tanaka, Shunitz Browse this author →KAKEN DB
Saito, Takeshi Browse this author →KAKEN DB
Kurasaki, Masaaki Browse this author →KAKEN DB
Keywords: Arsenic
Removal
Chitosan
Zero valent iron
Cyclodextrin
Nanocomposite
Issue Date: Mar-2014
Publisher: Elsevier Ltd.
Journal Title: Journal of Environmental Chemical Engineering
Volume: 2
Issue: 1
Start Page: 370
End Page: 376
Publisher DOI: 10.1016/j.jece.2014.01.009
Abstract: Nano zerovalent iron impregnated chitosan-carboxymethyl β-cyclodextrin complex has been successfully tested for arsenic removal. Addition of chitosan enhances the stability of Fe0 particles and the carboxymethyl β-cyclodextrin gives the composite more active sites to interact with the target ions. Removal of arsenic(III) and arsenic(V) was studied through batch adsorption at pH 6.0 under equilibrium and dynamic conditions. Prepared beads were characterized by FT-IR, SEM, BET and XPS. The rate of reduction can be expressed by pseudo-second-order reaction kinetics plus the equilibrium data were well fitted to Langmuir adsorption models. Equilibrium is achieved after 3 h and As(III) and As(V) were reduced to <20 μg/L which accounts 99% of the total removal below the Bangladesh standard (50 μg/L). The adsorption capacity was calculated from Langmuir model and found to be 18.51 mg/g and 13.51 mg/g for As(III) and As(V), respectively. The adsorbent can be separated magnetically and thus reused successfully for the removal of total inorganic arsenic from water. So, this adsorbent can be a potential material for the remediation of contaminated surface and ground water.
Type: article (author version)
URI: http://hdl.handle.net/2115/54749
Appears in Collections:環境科学院・地球環境科学研究院 (Graduate School of Environmental Science / Faculty of Environmental Earth Science) > 雑誌発表論文等 (Peer-reviewed Journal Articles, etc)

Submitter: 藏崎 正明

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