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The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical alpha-Fe2O3 structures exposed by (001) and non-(001) planes
Liu, Zhong1,4; Yu, Ruitao2; Dong, Yaping1; Li, Wu1,4; Lv, Baoliang3
2017-02-01
发表期刊CHEMICAL ENGINEERING JOURNAL
卷号309页码:815-823
文章类型Article
摘要Two kinds of 3D hierarchical alpha-Fe2O3 nanoparticles, flower-like structure with the (0 0 1) plane predominantly exposed on petals and urchin-like structure with nanorods grown along [001] direction, have been synthesized under the influence of glycerol by a facile hydrothermal method. It is proposed that the Fe(III)-glycerol micro-reaction units that selectively adsorb to (0 0 1) or other planes result in different morphologies. The adsorption of Cr(VI) from aqueous solution onto these alpha-Fe2O3 nanoparticles showed that the removal efficiency up to 98.5% and 88.8% in 25 mg/L Cr(VI) solution, and the adsorption capacity reaches to 34.4 mg/g and 26.0 mg/g without pH adjustment. The adsorption kinetic is well described by the pseudo-second-order model and the Cr(VI) adsorption on the adsorbent agrees well with the Langmuir model. Lower surface areas and more excellent adsorption property associates with the chemisorption of Cr(VI) onto alpha-Fe2O3 (0 01), which is achieved by coordination between Cr(VI) and doubly or triply coordinated hydroxyl groups on alpha-Fe2O3 surface. (C) 2016 Elsevier B.V. All rights reserved.
关键词Alpha-fe2o3 Plane Cr(Vi) Adsorption Mechanism
WOS标题词Science & Technology ; Technology
关键词[WOS]RESPONSE-SURFACE METHODOLOGY ; AQUEOUS-SOLUTION ; HOLLOW SPHERES ; REMOVAL ; OPTIMIZATION ; WATER ; NANOPARTICLES ; NANOFIBERS ; SORPTION ; NI2+
收录类别SCI
语种英语
WOS研究方向Engineering
WOS类目Engineering, Environmental ; Engineering, Chemical
WOS记录号WOS:000389166400084
引用统计
文献类型期刊论文
条目标识符http://ir.isl.ac.cn/handle/363002/6175
专题青海盐湖研究所知识仓储
盐湖资源综合利用工程技术中心
盐湖资源与化学实验室
作者单位1.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Comprehens & Highly Efficient Utilizat Sa, Xining 810008, Peoples R China
2.Chinese Acad Sci, Northwest Plateau Biol Inst, Key Lab Tibetan Med Res, Xining 810008, Peoples R China
3.Chinese Acad Sci, Inst Coal Chem, State Key Lab Coal Convers, Taiyuan 030001, Peoples R China
4.Chinese Acad Sci, Qinghai Inst Salt Lakes, Key Lab Salt Lake Resources & Chem, Xining 810008, Peoples R China
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Liu, Zhong,Yu, Ruitao,Dong, Yaping,et al. The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical alpha-Fe2O3 structures exposed by (001) and non-(001) planes[J]. CHEMICAL ENGINEERING JOURNAL,2017,309:815-823.
APA Liu, Zhong,Yu, Ruitao,Dong, Yaping,Li, Wu,&Lv, Baoliang.(2017).The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical alpha-Fe2O3 structures exposed by (001) and non-(001) planes.CHEMICAL ENGINEERING JOURNAL,309,815-823.
MLA Liu, Zhong,et al."The adsorption behavior and mechanism of Cr(VI) on 3D hierarchical alpha-Fe2O3 structures exposed by (001) and non-(001) planes".CHEMICAL ENGINEERING JOURNAL 309(2017):815-823.
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