Chemically modified magnetic chitosan microspheres for Cr(VI) removal from acidic aqueous solution
Sun, Xitong1; Li, Qian2; Yang, Liangrong3; Liu, Huizhou1,3
2016-06-01
发表期刊PARTICUOLOGY
ISSN1674-2001
卷号26期号:JUN页码:79-86
摘要A bioadsorbent composed of magnetic silica nanoparticles encapsulated by chitosan microspheres was prepared by the emulsion cross-linking method, and it was then modified with quaternary ammonium groups by reaction with ethylenediamine and glycidyl trimethylammonium chloride. Characterization of the bioadsorbent indicated that it was highly acid resistant and magnetically responsive. The bioadsorbent was then used to remove Cr(VI) from acidic aqueous solution. The results of batch experiments indicated that the optimal pH value was 2.5, and the adsorbent exhibited low pH dependence. The maximum adsorption capacity was 233.1 mg/g at pH 2.5 and 25 degrees C, and the equilibrium time was determined to be 40-120 min depending on the initial Cr(VI) concentration. The adsorbent could be effectively regenerated using a mixture of 0.3 mol/L NaOH and 0.3 mol/L NaCl with a desorption efficiency of 95.6%, indicating high reusability. In conclusion, the bioadsorbent shows potential for Cr(Vl) removal from acidic wastewater. (C) 2016 Chinese Society of Particuology and Institute of Process Engineering, Chinese Academy of Sciences. Published by Elsevier B.V. All rights reserved.
关键词Chitosan Quaternary Ammonium Magnetic Adsorption Cr(Vl)
文章类型Article
WOS标题词Science & Technology ; Technology
DOI10.1016/j.partic.2015.11.003
收录类别SCI
语种英语
关键词[WOS]HEAVY-METAL IONS ; HIGH-CAPACITY ADSORPTION ; HEXAVALENT CHROMIUM ; ADSORBENT ; NANOPARTICLES ; KINETICS ; CARBON ; BEADS ; DYE ; THERMODYNAMICS
WOS研究方向Engineering ; Materials Science
WOS类目Engineering, Chemical ; Materials Science, Multidisciplinary
项目资助者National Natural Science Foundation of China(21106162) ; National Key Natural Science Foundation of China(21136009) ; Major Project of the National Natural Science Foundation of China(51090382) ; General Research Project of Liaoning Education Department(L2015045) ; Youth Foundation of Dalian Polytechnic University(67007908)
WOS记录号WOS:000375502100009
引用统计
被引频次:11[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/122111/21033
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, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, Qingdao 266101, Peoples R China
2.Dalian Polytech Univ, Sch Biol Engn, Dalian 116034, Peoples R China
3.Chinese Acad Sci, Inst Proc Engn, CAS Key Lab Green Proc & Engn, Beijing 100190, Peoples R China
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Sun, Xitong,Li, Qian,Yang, Liangrong,et al. Chemically modified magnetic chitosan microspheres for Cr(VI) removal from acidic aqueous solution[J]. PARTICUOLOGY,2016,26(JUN):79-86.
APA Sun, Xitong,Li, Qian,Yang, Liangrong,&Liu, Huizhou.(2016).Chemically modified magnetic chitosan microspheres for Cr(VI) removal from acidic aqueous solution.PARTICUOLOGY,26(JUN),79-86.
MLA Sun, Xitong,et al."Chemically modified magnetic chitosan microspheres for Cr(VI) removal from acidic aqueous solution".PARTICUOLOGY 26.JUN(2016):79-86.
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