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High catalytic oxidation of As(III) by molecular oxygen over Fe-loaded silicon carbide with MW activation.
Chemosphere. 2018 May; 198:537-545.C

Abstract

The catalytic oxidation of arsenite (As(III)) to arsenate (As(V)) and the removal of arsenic (As) in an iron loaded silicon carbide (Fe/SiC) system under microwave (MW) irradiation were studied. Fe/SiC was synthesized by electro-deposition and its capability of activating molecular oxygen was also characterized. Highly efficient As(III) removal in a wide pH range of 2.5-9.5 was achieved, involving oxidation by reactive oxidation species (OH and O2-) induced by MW irradiation and adsorption by the generated Fe (hrdro)oxide precipitates. Significant enhancement of As(III) oxidation was achieved at acidic pH, where sequential fresh Fe(0) exposure with MW irradiation could improve the Fenton-like reactions and oxidation efficiency for As(III). As(III) removal was accelerated via adsorption at alkaline conditions, where the adsorbed Fe(II) on Fe/SiC showed significant catalytic activity for molecular oxygen and high pH further favored the formation of (hydro)oxides and the As sequestration by adsorption. Fe/SiC showed superior performance for the treatment of As in water with MW irradiation.

Authors+Show Affiliations

School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China.School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China. Electronic address: chenjing@mail.hust.edu.cn.School of Environmental Science and Engineering, Huazhong University of Science and Technology, 1037 Luoyu Road, Wuhan, 430074, PR China. Electronic address: wanglinling@mail.hust.edu.cn.Brook Byers Institute for Sustainable Systems, School of Civil and Environmental Engineering, Georgia Institute of Technology, Atlanta, GA 30332, USA.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

29428768

Citation

Pan, Hong, et al. "High Catalytic Oxidation of As(III) By Molecular Oxygen Over Fe-loaded Silicon Carbide With MW Activation." Chemosphere, vol. 198, 2018, pp. 537-545.
Pan H, Hou H, Shi Y, et al. High catalytic oxidation of As(III) by molecular oxygen over Fe-loaded silicon carbide with MW activation. Chemosphere. 2018;198:537-545.
Pan, H., Hou, H., Shi, Y., Li, H., Chen, J., Wang, L., & Crittenden, J. C. (2018). High catalytic oxidation of As(III) by molecular oxygen over Fe-loaded silicon carbide with MW activation. Chemosphere, 198, 537-545. https://doi.org/10.1016/j.chemosphere.2018.01.116
Pan H, et al. High Catalytic Oxidation of As(III) By Molecular Oxygen Over Fe-loaded Silicon Carbide With MW Activation. Chemosphere. 2018;198:537-545. PubMed PMID: 29428768.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - High catalytic oxidation of As(III) by molecular oxygen over Fe-loaded silicon carbide with MW activation. AU - Pan,Hong, AU - Hou,Huijie, AU - Shi,Yao, AU - Li,Hongbo, AU - Chen,Jing, AU - Wang,Linling, AU - Crittenden,John C, Y1 - 2018/02/08/ PY - 2017/08/20/received PY - 2018/01/08/revised PY - 2018/01/23/accepted PY - 2018/2/13/pubmed PY - 2018/6/13/medline PY - 2018/2/12/entrez KW - Arsenite KW - Fe arsenic complex KW - Fe/SiC KW - MW irradiation KW - Molecular oxygen activation SP - 537 EP - 545 JF - Chemosphere JO - Chemosphere VL - 198 N2 - The catalytic oxidation of arsenite (As(III)) to arsenate (As(V)) and the removal of arsenic (As) in an iron loaded silicon carbide (Fe/SiC) system under microwave (MW) irradiation were studied. Fe/SiC was synthesized by electro-deposition and its capability of activating molecular oxygen was also characterized. Highly efficient As(III) removal in a wide pH range of 2.5-9.5 was achieved, involving oxidation by reactive oxidation species (OH and O2-) induced by MW irradiation and adsorption by the generated Fe (hrdro)oxide precipitates. Significant enhancement of As(III) oxidation was achieved at acidic pH, where sequential fresh Fe(0) exposure with MW irradiation could improve the Fenton-like reactions and oxidation efficiency for As(III). As(III) removal was accelerated via adsorption at alkaline conditions, where the adsorbed Fe(II) on Fe/SiC showed significant catalytic activity for molecular oxygen and high pH further favored the formation of (hydro)oxides and the As sequestration by adsorption. Fe/SiC showed superior performance for the treatment of As in water with MW irradiation. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/29428768/High_catalytic_oxidation_of_As_III__by_molecular_oxygen_over_Fe_loaded_silicon_carbide_with_MW_activation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(18)30133-4 DB - PRIME DP - Unbound Medicine ER -