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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
发表期刊RSC ADVANCES
ISSN2046-2069
卷号6期号:22页码:18471-18482
摘要Two 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.
关键词Aqueous-solution Hexavalent Chromium Rapid Removal Metal-ions Cr(Vi) Adsorption Nanoparticles Microspheres Separation Chitosan
文章类型Article
学科领域Chemistry, Multidisciplinary ; Chemistry
WOS标题词Science & Technology ; Physical Sciences
DOI10.1039/c5ra27028f
URL查看原文
收录类别SCI
语种英语
关键词[WOS]AQUEOUS-SOLUTION ; HEXAVALENT CHROMIUM ; RAPID REMOVAL ; METAL-IONS ; CR(VI) ; ADSORPTION ; NANOPARTICLES ; MICROSPHERES ; SEPARATION ; CHITOSAN
WOS研究方向Chemistry
WOS类目Chemistry, Multidisciplinary
项目资助者National 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记录号WOS:000370717900071
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/122111/20709
专题研究所(批量导入)
通讯作者Sun, XT
作者单位1.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
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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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