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Removal of Cadmium and Chromium Ions Using Modified α, β, and γ-Cyclodextrin Polymers

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Title: Removal of Cadmium and Chromium Ions Using Modified α, β, and γ-Cyclodextrin Polymers
Authors: Sikder, Md. Tajuddin Browse this author
Kikuchi, Tohru Browse this author
Suzuki, Junichi Browse this author
Hosokawa, Toshiyuki Browse this author →KAKEN DB
Saito, Takeshi Browse this author →KAKEN DB
Kurasaki, Masaaki Browse this author →KAKEN DB
Keywords: adsorption
cyclodextrin polymer
epichlorohydrin
heavy metal
remediation
Issue Date: 1-Feb-2013
Publisher: Taylor & Francis
Journal Title: Separation Science and Technology
Volume: 48
Issue: 4
Start Page: 587
End Page: 597
Publisher DOI: 10.1080/01496395.2012.707726
Abstract: The adsorption of cadmium and chromium from aqueous solutions with epichlorohydrin cross-linked α, β, and γ-cyclodextrin polymers (CDPs) was investigated under a wide range of experimental conditions including pH values, metal concentration, and CDP amounts. Recent studies have shown that α, β, and γ CDPs follow the Freundlich, Langmuir, and Brunauer-Emmett-Teller models and are capable of reducing heavy metal ion concentrations in water to desirable levels with enhanced sorption capabilities. The removal of cadmium and chromium achieved equilibrium in 4 h. The pH of effective cadmium removal was 6.5 to 7.5, and phosphate buffer favored the removal of cadmium in the presence of potassium ion. Chromium removal was optimal at pH 3.6 to 6.5. Current technologies can remove 99% cadmium ions from solution, yet this process is not very efficient. Furthermore, a small amount of CDPs can remove large quantities of heavy metal ions and can then be regenerated with acid for reuse. The present results are promising for using inexpensive CDPs as a low-cost material that is effective in remediating waters contaminated with heavy metal species. The sorption kinetics of CDPs along with the conditions to adsorb cadmium and chromium are reported here for the first time.
Rights: This is an Author's Accepted Manuscript of an article published in Separation Science and Technology, 48(4), 2013, pages 587-597, copyright Taylor & Francis, available online at: http://www.tandfonline.com/10.1080/01496395.2012.707726
Type: article (author version)
URI: http://hdl.handle.net/2115/54525
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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