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Bentonite-supported nanoscale zero-valent iron/persulfate system for the simultaneous removal of Cr(VI) and phenol from aqueous solutions
Diao, Zeng-Hui; Xu, Xiang-Rong; Jiang, Dan; Kong, Ling-Jun; Sun, Yu-Xin; Hu, Yong-Xia; Hao, Qin-Wei; Chen, Hui; 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 PublicationCHEMICAL ENGINEERING JOURNAL
Volume302Pages:213-222
AbstractIn this study, bentonite-supported nanoscale zero-valent iron (B-nZVI) was used as a catalyst to activate persulfate (PS) for the simultaneous removal of Cr(VI) and phenol from aqueous solutions. Experimental results indicated that the presence of bentonite could decrease the aggregation of nZVI and increase its reactivity. The removal rates of Cr(VI) and phenol by B-nZVI system were 99.90% and 6.50%, respectively. Whereas the corresponding values by B-nZVI/PS system were 99.30% and 71.50%, respectively. The presence of persulfate could not significantly decline B-nZVI reactivity toward Cr(VI) reduction but remarkably promote phenol oxidation. The addition of Cr(VI) did positively affect the oxidation rate of phenol, a significant synergistic effect between Cr(VI) reduction and phenol oxidation was achieved in B-nZVI/PS system. A positive correlation between persulfate decomposition and dissolved Fe2+ was found. Cr(III) species such as Cr2O3, Cr(OH)(3) were identified in Cr(VI) reduction process, whereas the oxidation products such as catechol, 1,4-benzoquinone, propionic acid and formic acid were identified in phenol oxidation process. The reusability experiments of B-nZVI demonstrated that the structure of B-nZVI was relatively stable after four cycles of reuse. This is the first report for the feasibility of B-nZVI as a catalyst to activate persulfate for the simultaneous removal of heavy metal and organic pollutant. (C) 2016 Elsevier B.V. All rights reserved.
Department[Diao, Zeng-Hui; Xu, Xiang-Rong; Sun, Yu-Xin; Hu, Yong-Xia; Hao, Qin-Wei; Chen, Hui] 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] South China Normal Univ, Res Resources Ctr, Guangzhou 510631, Guangdong, Peoples R China; [Kong, Ling-Jun] Guangzhou Univ, Sch Environm Sci & Engn, Guangzhou 510006, Guangdong, Peoples R China; [Hu, Yong-Xia; Hao, Qin-Wei; Chen, Hui] Univ Chinese Acad Sci, Beijing 100049, Peoples R China ; LMB
KeywordNano Zero-valent Iron Persulfate Cr(Vi) Phenol Simultaneous Removal Sulfate Radical Oxidation
Subject AreaEngineering
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/15276
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,Jiang, Dan,et al. Bentonite-supported nanoscale zero-valent iron/persulfate system for the simultaneous removal of Cr(VI) and phenol from aqueous solutions[J]. CHEMICAL ENGINEERING JOURNAL,2016,302:213-222.
APA Diao, Zeng-Hui.,Xu, Xiang-Rong.,Jiang, Dan.,Kong, Ling-Jun.,Sun, Yu-Xin.,...&Xu, XR .(2016).Bentonite-supported nanoscale zero-valent iron/persulfate system for the simultaneous removal of Cr(VI) and phenol from aqueous solutions.CHEMICAL ENGINEERING JOURNAL,302,213-222.
MLA Diao, Zeng-Hui,et al."Bentonite-supported nanoscale zero-valent iron/persulfate system for the simultaneous removal of Cr(VI) and phenol from aqueous solutions".CHEMICAL ENGINEERING JOURNAL 302(2016):213-222.
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