DOI: 10.1016/j.watres.2018.10.001
Scopus记录号: 2-s2.0-85054441481
论文题名: Enhanced removal of arsenite and arsenate by a multifunctional Fe-Ti-Mn composite oxide: Photooxidation, oxidation and adsorption
作者: Zhang W. ; Zhang G. ; Liu C. ; Li J. ; Zheng T. ; Ma J. ; Wang L. ; Jiang J. ; Zhai X.
刊名: Water Research
ISSN: 431354
出版年: 2018
卷: 147 起始页码: 264
结束页码: 275
语种: 英语
英文关键词: Adsorption
; Arsenic
; Fe-Ti-Mn composite oxide
; Oxidation
; Photooxidation
英文摘要: In order to attain a high-efficiency and low-cost adsorbent for both arsenate (As(V)) and arsenite (As(III)) removal from As-contaminated water, a novel nanostructured Fe-Ti-Mn composite oxide (FTMO) was fabricated through a one-step simultaneous oxidation and co-precipitation method. Batch control experiments and series of spectroscopy detection technologies were carried out to investigate the surface change of the FTMO adsorbent and the respective role of Fe, Ti and Mn content in the arsenic adsorption process. The results showed that the FTMO adsorbent had a high adsorption capacity for both As(V) and As(III) (especially for the latter one) via the formation of inner-sphere complexes at the water/oxide interface under both darkness and light conditions. The material could effectively oxidize As(III) to As(V) and light illumination could further apparently enhance the As(III) oxidation, thus achieving high adsorption efficiency of As(III). Combined with the characterizations from FTIR, ESR and XPS, it was assumed that the predominant As(III) removal mechanism could be attributed to the coupling of various processes including photooxidation, oxidation and adsorption. The Ti and Mn contents were dominant for the As(III) oxidation, while the Fe content mainly played an important role for the adsorption of newly formed As(V). However, the involvement of surface hydroxyl groups and the formation of inner-sphere surface complexes were primarily responsible for the As(V) adsorption mechanism. Moreover, the successful removal of arsenic from real water matrices made the FTMO a potentially attractive adsorbent for both As(V) and As(III) removal. © 2018 Elsevier Ltd Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/112376
Appears in Collections: 气候减缓与适应
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作者单位: State Key Laboratory of Urban Water Resource and Environment, School of Environment, Harbin Institute of Technology, Harbin, Heilongjiang 150090, China; Collaborative Innovation Center of Water Quality Safety and Protection in Pearl River Delta, Guangzhou University, Guangzhou, 510006, China; Key Laboratory of Ecological Environment of Ministry of Education of Three Gorges Reservoir Area, School of Urban Construction and Environmental Engineering, Chongqing University, Chongqing, 400045, China
Recommended Citation:
Zhang W.,Zhang G.,Liu C.,et al. Enhanced removal of arsenite and arsenate by a multifunctional Fe-Ti-Mn composite oxide: Photooxidation, oxidation and adsorption[J]. Water Research,2018-01-01,147