Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres
Hua, Chao1,2; Zhang, Runhu3; Bai, Fang1,2; Lu, Ping1,2; Liang, Xiangfeng1
2017-02-01
发表期刊CHINESE JOURNAL OF CHEMICAL ENGINEERING
ISSN1004-9541
卷号25期号:2页码:153-158
摘要In this study, quaternized chitosan microspheres (QCMS) were prepared and its Cr (VI) removal potential was investigated. Batch experiments were conducted to examine kinetics, adsorption isotherm, pH effect, and thermodynamic parameters. Equilibrium was attained within 50 min and maximum removal of 97.34% was achieved under the optimum conditions at pH 5. Adsorption data for Cr (VI) uptake by the QCMS were analyzed according to Langmuir, Freundlich, and Temkin adsorption models. The maximum uptake of Cr (VI) was 39.1 mg.g(-1). Thermodynamic parameters for the adsorption system were determinated at 293 K, 303 K, 313 K and 323 K. (Delta H degrees = 16.08 kJ.mol(-1); Delta G degrees = -5.84 to -8.08 kJ.mol(-1) and Delta S degrees = 74.81 J.K-1.mol(-1)). So the positive values of both Delta H degrees and Delta S degrees suggest an endothermic reaction and increase in randomness at the solid-liquid interface during the adsorption. Delta G degrees values obtainedwere negative indicating a spontaneous adsorption process. The kinetic processwas described by a pseudo-second-order rate equation very well. The results of the present study indicated that the QCMS could be considered as a potential adsorbent for Cr (VI) in aqueous solutions. (C) 2016 The Chemical Industry and Engineering Society of China, and Chemical Industry Press. All rights reserved.
关键词Chromium (Vi) Adsorption Quaternized Chitosan Microspheres Isotherms Thermodynamics
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.cjche.2016.08.024
收录类别SCI
语种英语
关键词[WOS]HEXAVALENT CHROMIUM ; ACTIVATED CARBON ; WASTE-WATER ; ADSORPTION ; KINETICS ; IONS ; EQUILIBRIUM ; SORPTION
WOS研究方向Engineering
WOS类目Engineering, Chemical
项目资助者National Key Basic Research Development Plan(2013CB632602) ; National Natural Science Foundation of China(21306198)
WOS记录号WOS:000397964300004
引用统计
被引频次:4[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ipe.ac.cn/handle/122111/22082
专题湿法冶金清洁生产技术国家工程实验室
作者单位1.Chinese Acad Sci, Inst Proc Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
2.Hebei Collaborat Innovat Ctr Modern Marine Chem T, Tianjin 300130, Peoples R China
3.Kunming Met Coll, Dept Chem Engn, Kunming 650033, Peoples R China
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Hua, Chao,Zhang, Runhu,Bai, Fang,et al. Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres[J]. CHINESE JOURNAL OF CHEMICAL ENGINEERING,2017,25(2):153-158.
APA Hua, Chao,Zhang, Runhu,Bai, Fang,Lu, Ping,&Liang, Xiangfeng.(2017).Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres.CHINESE JOURNAL OF CHEMICAL ENGINEERING,25(2),153-158.
MLA Hua, Chao,et al."Removal of chromium (VI) from aqueous solutions using quaternized chitosan microspheres".CHINESE JOURNAL OF CHEMICAL ENGINEERING 25.2(2017):153-158.
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