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
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.
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
[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
