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Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies
Sun, Xitong1; Li, Qian2; Yang, Liangrong3; Liu, Huizhou1,3; Sun, XT
2016
Source PublicationRSC ADVANCES
ISSN2046-2069
Volume6Issue:22Pages:18471-18482
AbstractTwo novel strongly basic magnetic adsorbents, quaternary ammonium-modified polystyrene and chitosan magnetic microspheres (Pst-MIMCl and CTS-GTMAC), were prepared using the in situ coprecipitation and emulsion cross-linking methods under mild conditions, with features of strong magnetic responsiveness and high quaternary ammonium group contents. The Cr(VI) adsorption/desorption properties and mechanisms of strongly and weakly basic magnetic adsorbents were compared through simulated wastewater. The strongly basic adsorbent exhibited low pH dependence, and the main adsorption mechanism was ion exchange. The weakly basic adsorbent exhibited high pH dependence, and the major adsorption mechanism was electrostatic attraction. Besides, the strongly basic adsorbent required higher desorption conditions than the weakly basic adsorbent owing to the difference of the desorption mechanisms. Furthermore, the removal selectivity of the strongly and weakly basic magnetic adsorbents was estimated by the chromium plating wastewater. The results demonstrated that the strongly basic magnetic adsorbents exhibited higher selectivity than the weakly basic magnetic adsorbents. In addition, the Pst-MIMCl was selected as the optimal magnetic adsorbent for Cr(VI) recovery from wastewater, with the advantages of strongly magnetic responsiveness, wide pH applicable range, high removal efficiency, high adsorption selectivity and good reusability.
KeywordAqueous-solution Hexavalent Chromium Rapid Removal Metal-ions Cr(Vi) Adsorption Nanoparticles Microspheres Separation Chitosan
SubtypeArticle
Subject AreaChemistry, Multidisciplinary ; Chemistry
WOS HeadingsScience & Technology ; Physical Sciences
DOI10.1039/c5ra27028f
URL查看原文
Indexed BySCI
Language英语
WOS KeywordAQUEOUS-SOLUTION ; HEXAVALENT CHROMIUM ; RAPID REMOVAL ; METAL-IONS ; CR(VI) ; ADSORPTION ; NANOPARTICLES ; MICROSPHERES ; SEPARATION ; CHITOSAN
WOS Research AreaChemistry
WOS SubjectChemistry, Multidisciplinary
Funding OrganizationNational Natural Science Foundation of China(21106162) ; National Key Natural Science Foundation of China(21136009) ; Major Project of National Natural Science Foundation of China(51090382) ; General Research Project of Liaoning Education Department(L2015045) ; Youth foundation of Dalian Polytechnic University(67007908)
WOS IDWOS:000370717900071
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ipe.ac.cn/handle/122111/20709
Collection研究所(批量导入)
Corresponding AuthorSun, XT
Affiliation1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, CAS Key Lab Biobased Mat, 189 Songling Rd, 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. Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies[J]. RSC ADVANCES,2016,6(22):18471-18482.
APA Sun, Xitong,Li, Qian,Yang, Liangrong,Liu, Huizhou,&Sun, XT.(2016).Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies.RSC ADVANCES,6(22),18471-18482.
MLA Sun, Xitong,et al."Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies".RSC ADVANCES 6.22(2016):18471-18482.
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