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

电子邮件地址：xiaoling9119@yahoo.cn"xiaoling9119@yahoo.cn

学科类别：Engineering; Environmental Sciences & Ecology

ISSN: 0304-3894