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Wood-based biochar as an excellent activator of peroxydisulfate for Acid Orange 7 decolorization.
Chemosphere. 2019 Sep; 231:32-40.C

Abstract

Wood-based biochar, as a metal-free heterogeneous activator of peroxydisulfate (PDS), was successfully prepared by pyrolysis of polar sawdust for efficient removal of Acid Orange 7 (AO7). The results demonstrate PDS could be effectively activated by wood-based biochar, and AO7 was rapidly eliminated in a wide range of pH value (3.0-10.0) with AO7 removal achieved ≥ 99.3% after 14 min reaction. The dominant reactive species in the biochar/PDS system were verified via radical quenching tests and electron paramagnetic resonance (EPR) technique. It is speculated that sulfate radicals (SO4•-) and hydroxyl radicals (•OH) were formed on the surface of biochar. Based on the results of X-ray photoelectron spectroscopy (XPS), π-electron density and oxygen-containing functional groups (especially C-OH) on biochar surface were active centers for the catalytic reaction. Recycle experiments of biochar for 4 runs were carried out and the regeneration method of the catalyst was also studied.

Authors+Show Affiliations

Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China.Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China.Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China.Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China.Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China. Electronic address: lheng2015@whu.edu.cn.Department of Environmental Science and Engineering, Hubei Biomass-Resource Chemistry and Environmental Biotechnology Key Laboratory, Wuhan University, Wuhan, 430079, China. Electronic address: eeng@whu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31128350

Citation

Zhu, Kangmeng, et al. "Wood-based Biochar as an Excellent Activator of Peroxydisulfate for Acid Orange 7 Decolorization." Chemosphere, vol. 231, 2019, pp. 32-40.
Zhu K, Wang X, Chen D, et al. Wood-based biochar as an excellent activator of peroxydisulfate for Acid Orange 7 decolorization. Chemosphere. 2019;231:32-40.
Zhu, K., Wang, X., Chen, D., Ren, W., Lin, H., & Zhang, H. (2019). Wood-based biochar as an excellent activator of peroxydisulfate for Acid Orange 7 decolorization. Chemosphere, 231, 32-40. https://doi.org/10.1016/j.chemosphere.2019.05.087
Zhu K, et al. Wood-based Biochar as an Excellent Activator of Peroxydisulfate for Acid Orange 7 Decolorization. Chemosphere. 2019;231:32-40. PubMed PMID: 31128350.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Wood-based biochar as an excellent activator of peroxydisulfate for Acid Orange 7 decolorization. AU - Zhu,Kangmeng, AU - Wang,Xisong, AU - Chen,Dong, AU - Ren,Wei, AU - Lin,Heng, AU - Zhang,Hui, Y1 - 2019/05/14/ PY - 2019/02/10/received PY - 2019/05/09/revised PY - 2019/05/11/accepted PY - 2019/5/28/pubmed PY - 2019/8/15/medline PY - 2019/5/26/entrez KW - Acid Orange 7 KW - Peroxydisulfate activation KW - Reactive species KW - Wood-based biochar SP - 32 EP - 40 JF - Chemosphere JO - Chemosphere VL - 231 N2 - Wood-based biochar, as a metal-free heterogeneous activator of peroxydisulfate (PDS), was successfully prepared by pyrolysis of polar sawdust for efficient removal of Acid Orange 7 (AO7). The results demonstrate PDS could be effectively activated by wood-based biochar, and AO7 was rapidly eliminated in a wide range of pH value (3.0-10.0) with AO7 removal achieved ≥ 99.3% after 14 min reaction. The dominant reactive species in the biochar/PDS system were verified via radical quenching tests and electron paramagnetic resonance (EPR) technique. It is speculated that sulfate radicals (SO4•-) and hydroxyl radicals (•OH) were formed on the surface of biochar. Based on the results of X-ray photoelectron spectroscopy (XPS), π-electron density and oxygen-containing functional groups (especially C-OH) on biochar surface were active centers for the catalytic reaction. Recycle experiments of biochar for 4 runs were carried out and the regeneration method of the catalyst was also studied. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31128350/Wood_based_biochar_as_an_excellent_activator_of_peroxydisulfate_for_Acid_Orange_7_decolorization_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)30989-0 DB - PRIME DP - Unbound Medicine ER -