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Simultaneous removal of Cr(VI) and phenol by persulfate activated with bentonite-supported nanoscale zero-valent iron: Reactivity and mechanism
Diao, Zeng-Hui; Xu, Xiang-Rong; Chen, Hui; Jiang, Dan; Yang, Yu-Xi; Kong, Ling-Jun; Sun, Yu-Xin; Hu, Yong-Xia; Hao, Qin-Wei; Liu, Ling; Xu, XR (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China.
2016
Source PublicationJOURNAL OF HAZARDOUS MATERIALS
Volume316Pages:186-193
AbstractThe applicability of bentonite-supported nanoscale zero-valent iron (B-nZVI) as a catalyst to activate persulfate (PS) for the simultaneous removal of Cr(VI) and phenol was systematically investigated in this study. Experimental results demonstrated that phenol degradation was significantly enhanced under acidic condition and with oxygen supply, whereas the Cr(VI) reduction was not obviously declined. The removal efficiencies of Cr(VI) and phenol in B-nZVI/PS combined system were 99.8 and 72.3%, respectively. Cr(VI) reduction and phenol oxidation was simultaneously achieved in B-nZVI/PS combined system, which provided a promising environmental treatment for industrial wastewater containing metal ions and organic compounds. An acidic condition was more favorable to the decomposition of persulfate for the production of sulfate radicals. Radical scavenging tests revealed that the predominant reactive oxygen species for phenol degradation was SO4 center dot-, neither HO center dot nor O-2(center dot-). A reaction mechanism, which involves the Cr(VI) removal mainly by the reduction of nZVI and the degradation of phenol mainly by the SO4 center dot- from the decomposition of persulfate, was proposed. These findings revealed that B-nZVI/PS combined system has a potential in the environmental remediation polluted jointly by organic compounds and/or heavy metals. (C) 2016 Elsevier B.V. All rights reserved.
Department[Diao, Zeng-Hui; Xu, Xiang-Rong; Chen, Hui; Sun, Yu-Xin; Hu, Yong-Xia; Hao, Qin-Wei; Liu, Ling] Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China; [Jiang, Dan] S China Normal Univ, Res Resources Ctr, Guangzhou 510631, Guangdong, Peoples R China; [Yang, Yu-Xi] Sun Yat Sen Univ, Sch Environm Sci & Engn, Guangzhou 510275, Peoples R China; [Kong, Ling-Jun] Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Peoples R China; [Chen, Hui; Hu, Yong-Xia; Hao, Qin-Wei] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; LMB
KeywordCr(Vi) Phenol Nano Zero-valent Iron Fenton-like Process Synergistic Effect
Subject AreaEngineering ; Environmental Sciences & Ecology
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15278
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding AuthorXu, XR (reprint author), Chinese Acad Sci, South China Sea Inst Oceanol, Guangdong Prov Key Lab Appl Marine Biol, Key Lab Trop Marine Bioresources & Ecol, Guangzhou 510301, Guangdong, Peoples R China.
Recommended Citation
GB/T 7714
Diao, Zeng-Hui,Xu, Xiang-Rong,Chen, Hui,et al. Simultaneous removal of Cr(VI) and phenol by persulfate activated with bentonite-supported nanoscale zero-valent iron: Reactivity and mechanism[J]. JOURNAL OF HAZARDOUS MATERIALS,2016,316:186-193.
APA Diao, Zeng-Hui.,Xu, Xiang-Rong.,Chen, Hui.,Jiang, Dan.,Yang, Yu-Xi.,...&Xu, XR .(2016).Simultaneous removal of Cr(VI) and phenol by persulfate activated with bentonite-supported nanoscale zero-valent iron: Reactivity and mechanism.JOURNAL OF HAZARDOUS MATERIALS,316,186-193.
MLA Diao, Zeng-Hui,et al."Simultaneous removal of Cr(VI) and phenol by persulfate activated with bentonite-supported nanoscale zero-valent iron: Reactivity and mechanism".JOURNAL OF HAZARDOUS MATERIALS 316(2016):186-193.
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