An ecological new approach for treating Cr(VI)-containing industrial wastewater: Photochemical reduction | |
Liu, Jie1,2; Huang, Kun1; Xie, Keng1; Yang, Ying2; Liu, Huizhou1,2 | |
刊名 | WATER RESEARCH |
2016-04-15 | |
卷号 | 93期号:1页码:187-194 |
关键词 | Cr(VI) Photochemical reduction Polyethylene glycol Aqueous two phases Recovery |
英文摘要 | An ecological new approach for photochemical reduction of Cr(VI) in aqueous solution by adding into water-soluble copolymer, polyethylene glycol (PEG), was investigated. Various influences including light intensity, initial solution pH value, PEG molecular weight and initial concentration ratio of PEG to Cr(VI) on photochemical reduction of Cr(VI) were discussed, and a possible reaction mechanism was proposed. Experimental results revealed that Cr(VI) could be reduced to Cr(III) by PEG under sunlight irradiation. The photo-reduction rate of Cr(VI) increased with the decrease of solution pH and PEG molecular weight, but increased with the light intensity. The reduction percentage of Cr(VI) increased with the initial concentration ratio of PEG to Cr(VI). When the initial solution pH value was below 3.0, almost all of Cr(VI) was completely reduced to Cr(III) within 20 min of 50 x 10(3) lux solar irradiation in the presence of PEG. After photo-reduction, PEG and Cr(III) in aqueous solutions could be recovered by adding into a high concentrated Na2SO4 aqueous solution to induce the formation of a stable PEG-based aqueous biphasic system. By doing so, Na2SO4 in aqueous solution could also be removed. The present work highlights a promising new route for treating the industrial wastewater containing toxic Cr(VI) ions by adding into environmental-friendly PEG for photo-reduction of Cr(VI) to Cr(III), and then salting-out recovery of PEG and removal of Cr(III) in wastewater by adding into another high-salt wastewater, so that the high-salt wastewater could also be treated. (C) 2016 Elsevier Ltd. All rights reserved. |
WOS标题词 | Science & Technology ; Technology ; Life Sciences & Biomedicine ; Physical Sciences |
类目[WOS] | Engineering, Environmental ; Environmental Sciences ; Water Resources |
研究领域[WOS] | Engineering ; Environmental Sciences & Ecology ; Water Resources |
关键词[WOS] | HEXAVALENT CHROMIUM ; 3-LIQUID-PHASE EXTRACTION ; PHOTOCATALYTIC REDUCTION ; POLYETHYLENE-GLYCOL ; AQUEOUS-SOLUTIONS ; SILVER NANOPARTICLES ; GOLD NANOPARTICLES ; MODIFIED TITANIA ; CR(VI) ; MECHANISM |
收录类别 | SCI |
语种 | 英语 |
WOS记录号 | WOS:000372940200021 |
内容类型 | 期刊论文 |
源URL | [http://ir.qibebt.ac.cn/handle/337004/8315] |
专题 | 资源环境与绿色分离团队 |
作者单位 | 1.Chinese Acad Sci, Inst Proc Engn, State Key Lab Biochem Engn, Key Lab Green Proc & Engn, Beijing 100190, Peoples R China 2.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Qingdao 266101, Shandong, Peoples R China |
推荐引用方式 GB/T 7714 | Liu, Jie,Huang, Kun,Xie, Keng,et al. An ecological new approach for treating Cr(VI)-containing industrial wastewater: Photochemical reduction[J]. WATER RESEARCH,2016,93(1):187-194. |
APA | Liu, Jie,Huang, Kun,Xie, Keng,Yang, Ying,&Liu, Huizhou.(2016).An ecological new approach for treating Cr(VI)-containing industrial wastewater: Photochemical reduction.WATER RESEARCH,93(1),187-194. |
MLA | Liu, Jie,et al."An ecological new approach for treating Cr(VI)-containing industrial wastewater: Photochemical reduction".WATER RESEARCH 93.1(2016):187-194. |
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