Removal of arsenate by cetyltrimethylammonium bromide modified magnetic   nanoparticles

doi:10.1016/j.jhazmat.2012.05.004

CORC > 北京大学 > 环境科学与工程学院

	Removal of arsenate by cetyltrimethylammonium bromide modified magnetic nanoparticles
	Jin, Yinjia ; Liu, Fei ; Tong, Meiping ; Hou, Yanglong
刊名	journal of hazardous materials
	2012
关键词	Magnetic nanoparticles Cetyltrimethylammonium bromide Arsenate Adsorption Natural organic matter NATURAL ORGANIC-MATTER ZERO-VALENT IRON AQUEOUS-SOLUTIONS HEAVY-METALS EFFICIENT REMOVAL ADSORPTION SIZE DESORPTION ARSENITE MONTMORILLONITE
DOI	10.1016/j.jhazmat.2012.05.004
英文摘要	Cetyltrimethylammonium bromide (CAB) modified magnetic nanoparticles (Fe3O4@CTAB) were synthesized and used to remove arsenate from water. Fe3O4@CTAB was prepared by a modified simple co-precipitation process with cheap and environmental friendly iron salts and cationic surfactant CTAB. Powder X-ray diffraction, X-ray photoelectron spectroscopy, and Fourier transform infra-red spectroscopy were utilized to characterize the prepared adsorbent (Fe3O4@CTAB). Transmission electron microscopy (TEM) image showed that Fe3O4@CTAB particles were approximately spherical with the core size of 10 nm. With a saturation magnetization of 67.2 emu g(-1), the Fe3O4@CTAB nanoparticles could be easily separated from solutions with a simple magnetic process in very short time (within 5 min). Adsorption of arsenate on Fe3O4@CTAB reached equilibrium within 2 min at pH 6. Arsenate adsorption agreed well with pseudo-second order kinetic model and two-site Langmuir isotherm model with the arsenate adsorption capacity of 23.07 mg g(-1), which was twice greater than that of pure Fe3O4. Arsenate removal rate was over 90% at a wide pH range from 3 to 9 and the removal of arsenate was not obviously affected by the presence of dissolved natural organic matter (up to 10 mg L-1 as TOC) and competitive anions (sulfate, bicarbonate, and silicate up to 20 mg L-1, and phosphate up to 5 mg L-1) in solutions. Fe3O4@CTAB could be regenerated in alkali solutions and more than 85% As(V) was removed even in fifth regeneration/reuse cycle. (C) 2012 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000306627000057&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Civil; Environmental Sciences; SCI(E); EI; PubMed; 42; ARTICLE; 461-468; 227
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158832]
专题	环境科学与工程学院工学院
推荐引用方式 GB/T 7714	Jin, Yinjia,Liu, Fei,Tong, Meiping,et al. Removal of arsenate by cetyltrimethylammonium bromide modified magnetic nanoparticles[J]. journal of hazardous materials,2012.
APA	Jin, Yinjia,Liu, Fei,Tong, Meiping,&Hou, Yanglong.(2012).Removal of arsenate by cetyltrimethylammonium bromide modified magnetic nanoparticles.journal of hazardous materials.
MLA	Jin, Yinjia,et al."Removal of arsenate by cetyltrimethylammonium bromide modified magnetic nanoparticles".journal of hazardous materials (2012).