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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
Source PublicationPARTICUOLOGY
ISSN1674-2001
Volume26Issue:JUNPages:79-86
AbstractA 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.
KeywordChitosan Quaternary Ammonium Magnetic Adsorption Cr(Vl)
SubtypeArticle
WOS HeadingsScience & Technology ; Technology
DOI10.1016/j.partic.2015.11.003
Indexed BySCI
Language英语
WOS KeywordHEAVY-METAL IONS ; HIGH-CAPACITY ADSORPTION ; HEXAVALENT CHROMIUM ; ADSORBENT ; NANOPARTICLES ; KINETICS ; CARBON ; BEADS ; DYE ; THERMODYNAMICS
WOS Research AreaEngineering ; Materials Science
WOS SubjectEngineering, Chemical ; Materials Science, Multidisciplinary
Funding OrganizationNational 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 IDWOS:000375502100009
Citation statistics
Cited Times:23[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/21033
Collection湿法冶金清洁生产技术国家工程实验室
Affiliation1.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
Recommended Citation
GB/T 7714
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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