Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies

CORC > 青岛生物能源与过程研究所 > 中国科学院青岛生物能源与过程研究所 > 资源环境与绿色分离团队

	Removal of chromium(VI) from wastewater using weakly and strongly basic magnetic adsorbents: adsorption/desorption property and mechanism comparative studies
	Sun, Xitong 1; Li, Qian 2; Yang, Liangrong 3; Liu, Huizhou 1,3
刊名	RSC ADVANCES
	2016
卷号	6 期号:22 页码:18471-18482
英文摘要	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.
WOS标题词	Science & Technology ; Physical Sciences
类目[WOS]	Chemistry, Multidisciplinary
研究领域[WOS]	Chemistry
关键词[WOS]	AQUEOUS-SOLUTION ; HEXAVALENT CHROMIUM ; RAPID REMOVAL ; METAL-IONS ; CR(VI) ; ADSORPTION ; NANOPARTICLES ; MICROSPHERES ; SEPARATION ; CHITOSAN
收录类别	SCI
语种	英语
WOS记录号	WOS:000370717900071
公开日期	2016-05-03
内容类型	期刊论文
源URL	[http://ir.qibebt.ac.cn/handle/337004/8023]
专题	资源环境与绿色分离团队
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
推荐引用方式 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.(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.