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肖玲等 A novel magnetically separable gamma-Fe(2)O(3)/crosslinked chitosan adsorbent: Preparation...
发布时间:2013-01-17 16:27:24     发布者:309     浏览次数:

标题:A novel magnetically separable gamma-Fe(2)O(3)/crosslinked chitosan adsorbent: Preparation, characterization and adsorption application for removal of hazardous azo dye

作者:Zhu, HY(Zhu, Hua-Yue);Jiang, R(Jiang, Ru);Xiao, L(Xiao, Ling);Li, W(Li, Wei)

来源出版物:JOURNAL OF HAZARDOUS MATERIALS卷:179期:1-3页:251-257出版年:JUL 15 2010

摘要:A novel magnetically separable adsorbent, namely magnetic gamma-Fe(2)O(3)/crosslinked chitosan composites (M gamma-Fe(2)O(3)/CSCs), was prepared by miroemulsion process and characterized by XRD, FT-IR, TGA, DSC, SEM and VSM. Adsorption of methyl orange (MO), used as a model pollutant, from aqueous solution on M gamma-Fe(2)O(3)/CSCs was investigated. Characterization results indicated that magnetic gamma-Fe(2)O(3) nanoparticles have been introduced in M gamma-Fe(2)O(3)/CSCs and kept intrinsic magnetic properties. The saturated magnetization (sigma(s)) of M gamma-Fe(2)O(3)/CSCs can be expediently adjusted by changing additive dosage of Fe(2)O(3). Adsorption results showed that both nanocomposite adsorbents with weight ratio of gamma-Fe(2)O(3) to chitosan of 1:10 and 2:5 exhibited higher adsorption capacities and attained adsorption equilibriums in shorter time compared with crosslinked chitosan. After adsorption, M gamma-Fe(2)O(3)/CSCs were effectively separated from reaction solution in 10 s by applying an adscititious magnetic field. Adsorption kinetics of MO on 1:10 M gamma-Fe(2)O(3)/CSCs followed the pseudo-second-order kinetic model. Effects of both initial pH and adsorbent dosage on the adsorption of MO were remarkable in experimental conditions. (c) 2010 Elsevier B.V. All rights reserved.

文献类型:Article

语种:English

作者关键词:Chitosan; Methyl orange; gamma-Fe(2)O(3); Magnetic separation; Adsorption

扩展关键词:GAS-SENSING PROPERTIES; SPENT ACTIVATED CLAY; METHYL-ORANGE; FE3O4-CHITOSAN NANOPARTICLES; AQUEOUS-SOLUTION; PHOTOCATALYTIC DEGRADATION; ACID DYE; CARBON; GAMMA-FE2O3; KINETICS

通讯作者地址:Xiao, L (通讯作者),Luojia Mt Wuchang, Wuhan 430072, Hubei Province, Peoples R China

地址:

[Zhu, Hua-Yue]Taizhou Univ, Dept Environm Engn, Linhai 317000, Peoples R China ;Wuhan Univ, Coll Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Peoples R China

[Jiang, Ru] Taizhou Univ, Dept Environm Engn, Linhai 317000, Peoples R China

[Xiao, Ling] Wuhan Univ, Coll Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Peoples R China

[Li, We] Wuhan Univ, Coll Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Peoples R China

学科类别:Engineering; Environmental Sciences & Ecology

ISSN: 0304-3894

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