HUSCAP logo Hokkaido Univ. logo

Hokkaido University Collection of Scholarly and Academic Papers >
Graduate School of Environmental Science / Faculty of Environmental Earth Science >
Peer-reviewed Journal Articles, etc >

Preparation and characterization of chitosan–caboxymethyl-β-cyclodextrin entrapped nanozero-valent iron composite for Cu (II) and Cr (IV) removal from wastewater

Files in This Item:
Fig. 9.jpg165.25 kBJPEGView/Open
Fig.1new.pdf574.93 kBPDFView/Open
Fig.2new.pdf320.45 kBPDFView/Open
Fig.3 new.pdf212.79 kBPDFView/Open
Fig.4new.pdf218.3 kBPDFView/Open
Fig.5new.pdf280.26 kBPDFView/Open
Fig.6new.pdf173.27 kBPDFView/Open
Fig.7new.pdf169.15 kBPDFView/Open
Fig.8new.pdf177.55 kBPDFView/Open
Highlights.pdf16.14 kBPDFView/Open
Revised Manuscript.pdf167.14 kBPDFView/Open
Table 1 Different adsorbent.pdf20.58 kBPDFView/Open
Table 2. Comparative analysis.pdf20.31 kBPDFView/Open
Please use this identifier to cite or link to this item:http://hdl.handle.net/2115/53586

Title: Preparation and characterization of chitosan–caboxymethyl-β-cyclodextrin entrapped nanozero-valent iron composite for Cu (II) and Cr (IV) removal from wastewater
Authors: Sikder, Md. Tajuddin Browse this author
Mihara, Yoshihiro Browse this author
Islam, Md. Shariful Browse this author
Saito, Takeshi Browse this author →KAKEN DB
Tanaka, Shunitz Browse this author →KAKEN DB
Kurasaki, Masaaki Browse this author →KAKEN DB
Keywords: Chitosan
Zero-valent iron
Remediation
Cyclodextrin polymer
Heavy metal
Water pollution
Issue Date: 15-Jan-2014
Publisher: Elsevier, B.V.
Journal Title: Chemical Engineering Journal
Volume: 236
Start Page: 378
End Page: 387
Publisher DOI: 10.1016/j.cej.2013.09.093
Abstract: The entrapment of Fe0 nanoparticles within a chitosan–carboxymethyl β-cyclodextrin complex, a nontoxic and biodegradable stabilizer, yields chitosan–Fe0 nanoparticle–carboxymethyl β-cyclodextrin beads that are 2.5 mm in diameter and contain 50% iron by weight. The complete disappearance of Cr (VI) and Cu (II) may involve both physical adsorption and reduction of Cr (VI) to Cr (III) and Cu (II) to Cu (0) while oxidizing Fe0 to Fe (III). The rate of reduction can be expressed by pseudo-second-order reaction kinetics. The rate constants increased with increasing iron loading and initial concentration at pH 6, while the adsorption of Cr (VI) and Cu (II) was found to be endothermic and exothermic, respectively. The apparent activation energies for Cr (VI) and Cu (II) were found to be 71.99 and 18.38 kJ mol−1, respectively. X-ray photoelectron spectroscopy confirmed the reduction process. The equilibrium data could be well described by both Langmuir and Temkin isotherms for describing monolayer adsorption and chemisorption processes, respectively. Both film diffusion and intraparticle diffusion were found to be the rate-limiting steps from the analysis of an intraparticle diffusion model. Thus, the synthesized chitosan–Fe0-nanoparticle–carboxymethyl β-cyclodextrin beads can be a potential material for in situ remediation of contaminated surface and ground water.
Relation: http://www.sciencedirect.com/science/article/pii/S1385894713012977
Type: article (author version)
URI: http://hdl.handle.net/2115/53586
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

Export metadata:

OAI-PMH ( junii2 , jpcoar )

MathJax is now OFF:


 

Feedback - Hokkaido University