Enhanced removal of trace arsenate by magnetic nanoparticles modified   with arginine and lysine

doi:10.1016/j.cej.2014.05.133

CORC > 北京大学 > 环境科学与工程学院

	Enhanced removal of trace arsenate by magnetic nanoparticles modified with arginine and lysine
	Zhang, Chengyu ; Shan, Chao ; Jin, Yinjia ; Tong, Meiping
刊名	chemical engineering journal
	2014
关键词	As(V) Amino acid Magnetic nanoparticles Adsorption Phosphate IRON-OXIDE NANOPARTICLES NATURAL ORGANIC-MATTER HEAVY-METALS GAMMA-FE2O3 NANOPARTICLES MIXED-OXIDE ADSORPTION ADSORBENT ARSENITE WATER SORPTION
DOI	10.1016/j.cej.2014.05.133
英文摘要	Two types of adsorbents, arginine (Arg) and lysine (Lys) modified Fe3O4 magnetic nanoparticles (ArgMNPs and Lys-MNPs), were synthesized by employing conventional co-precipitation process and used to remove trace arsenate [As(V)] from water. Various techniques including transmission electron microscopy (TEM), powder X-ray diffraction, Fourier transform infra-red spectroscopy, energy dispersive X-ray spectrometry, and thermogravimetric analysis were utilized to characterize the synthesized adsorbents. TEM images showed that both fabricated materials were spherical with diameter of approximately 10 nm. With saturation magnetization of around 73.0 emu/g, both adsorbents could be easily separated from water with a simple magnetic process in 5 min. The As(V) adsorption capacities of Arg-MNPs and Lys-MNPs were 29.14 and 23.86 mg/g, respectively, which were twice larger than that of bare MNPs (12.12 mg/g). Both adsorbents (0.1 g/L) could remove over 90% of As(V) (100 mu g/L) from water over a wide pH range from 3 to 9. Moreover, natural organic matters (humic acid and alginate) and competitive anions including sulfate, bicarbonate, silicate, and phosphate did not obviously affect the adsorption of As(V) by the modified adsorbents. The removal of As(V) maintained above 83% even with extremely high concentration of phosphate (50 mg/L). As(V) could also be effectively removed from challenge water and real river water by the modified adsorbents. Both magnetic particles could be easily regenerated in alkali solutions and their adsorption capacities were still greater than 10 mg/g even in the fifth cycle. (C) 2014 Elsevier B.V. All rights reserved.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000340688100039&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Engineering, Environmental; Engineering, Chemical; SCI(E); EI; 8; ARTICLE; tongmeiping@iee.pku.edu.cn; 340-348; 254
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/158224]
专题	环境科学与工程学院
推荐引用方式 GB/T 7714	Zhang, Chengyu,Shan, Chao,Jin, Yinjia,et al. Enhanced removal of trace arsenate by magnetic nanoparticles modified with arginine and lysine[J]. chemical engineering journal,2014.
APA	Zhang, Chengyu,Shan, Chao,Jin, Yinjia,&Tong, Meiping.(2014).Enhanced removal of trace arsenate by magnetic nanoparticles modified with arginine and lysine.chemical engineering journal.
MLA	Zhang, Chengyu,et al."Enhanced removal of trace arsenate by magnetic nanoparticles modified with arginine and lysine".chemical engineering journal (2014).