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Significantly enhanced base activation of peroxymonosulfate by polyphosphates: Kinetics and mechanism.
Chemosphere. 2017 Apr; 173:529-534.C

Abstract

Base activation of peroxydisulfate (PDS) is a common process aiming for water treatment, but requires high doses of PDS and strongly basic solutions. Peroxymonosulfate (PMS), another peroxygen of sulfurate derived from PDS, may also be activated by a less basic solution. However, enhancing the base-PMS reactivity is still challenging. Here it is reported that pyrophosphate (PA) and tripolyphosphate (PB) can efficiently enhance PMS activation under weakly alkaline conditions (pH 9.5) via the formation of superoxide anion radical (O2•-) and singlet oxygen (1O2). The rate constant of Acid Orange 7 (AO7) degradation in PA/PMS system (kPA/PMS) was nearly 4.4-15.9 fold higher than that in PMS/base system (kPMS/base) without any polyphosphates. Increases in PA (or PB) concentration, PMS dose and pH favored the rapid dye degradation. Gas chromatograph-mass spectrometer (GC-MS) data confirmed AO7 and 2,4,6-trichlorophenol (2,4,6-TCP) were decomposed to a series of organic intermediates. The radical quenching and probe oxidation experiments indicate the degradation of organic compounds in the PA/PMS and PB/PMS processes was not reliant on sulfate radical (SO4•-) and hydroxyl radical (OH) species but on O2- and 1O2 reactive species. Comparison experiments show that the polyphosphate/PMS process was much more favorable than PDS/base process. The present work provides a novel way to activate PMS for contaminant removal using industrial polyphosphate wastewaters.

Authors+Show Affiliations

East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, China; State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai, 200090, China.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; International Center for Balanced Land Use (ICBLU), The University of Newcastle, Callaghan, NSW 2308, Australia. Electronic address: zhaohuiwang@dhu.edu.cn.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China.State Environmental Protection Engineering Center for Pollution Treatment and Control in Textile Industry, College of Environmental Science and Engineering, Donghua University, Shanghai, 201620, China; Shanghai Cooperative Centre for WEEE Recycling, School of Environmental and Materials Engineering, Shanghai Polytechnic University, Shanghai, 201209, China. Electronic address: ygguo@sspu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

28142111

Citation

Lou, Xiaoyi, et al. "Significantly Enhanced Base Activation of Peroxymonosulfate By Polyphosphates: Kinetics and Mechanism." Chemosphere, vol. 173, 2017, pp. 529-534.
Lou X, Fang C, Geng Z, et al. Significantly enhanced base activation of peroxymonosulfate by polyphosphates: Kinetics and mechanism. Chemosphere. 2017;173:529-534.
Lou, X., Fang, C., Geng, Z., Jin, Y., Xiao, D., Wang, Z., Liu, J., & Guo, Y. (2017). Significantly enhanced base activation of peroxymonosulfate by polyphosphates: Kinetics and mechanism. Chemosphere, 173, 529-534. https://doi.org/10.1016/j.chemosphere.2017.01.093
Lou X, et al. Significantly Enhanced Base Activation of Peroxymonosulfate By Polyphosphates: Kinetics and Mechanism. Chemosphere. 2017;173:529-534. PubMed PMID: 28142111.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Significantly enhanced base activation of peroxymonosulfate by polyphosphates: Kinetics and mechanism. AU - Lou,Xiaoyi, AU - Fang,Changling, AU - Geng,Zhuning, AU - Jin,Yuming, AU - Xiao,Dongxue, AU - Wang,Zhaohui, AU - Liu,Jianshe, AU - Guo,Yaoguang, Y1 - 2017/01/21/ PY - 2016/10/11/received PY - 2016/12/22/revised PY - 2017/01/18/accepted PY - 2017/2/1/pubmed PY - 2017/4/12/medline PY - 2017/2/1/entrez KW - Degradation KW - Peroxymonosulfate activation KW - Radical quenching KW - Singlet oxygen SP - 529 EP - 534 JF - Chemosphere JO - Chemosphere VL - 173 N2 - Base activation of peroxydisulfate (PDS) is a common process aiming for water treatment, but requires high doses of PDS and strongly basic solutions. Peroxymonosulfate (PMS), another peroxygen of sulfurate derived from PDS, may also be activated by a less basic solution. However, enhancing the base-PMS reactivity is still challenging. Here it is reported that pyrophosphate (PA) and tripolyphosphate (PB) can efficiently enhance PMS activation under weakly alkaline conditions (pH 9.5) via the formation of superoxide anion radical (O2•-) and singlet oxygen (1O2). The rate constant of Acid Orange 7 (AO7) degradation in PA/PMS system (kPA/PMS) was nearly 4.4-15.9 fold higher than that in PMS/base system (kPMS/base) without any polyphosphates. Increases in PA (or PB) concentration, PMS dose and pH favored the rapid dye degradation. Gas chromatograph-mass spectrometer (GC-MS) data confirmed AO7 and 2,4,6-trichlorophenol (2,4,6-TCP) were decomposed to a series of organic intermediates. The radical quenching and probe oxidation experiments indicate the degradation of organic compounds in the PA/PMS and PB/PMS processes was not reliant on sulfate radical (SO4•-) and hydroxyl radical (OH) species but on O2- and 1O2 reactive species. Comparison experiments show that the polyphosphate/PMS process was much more favorable than PDS/base process. The present work provides a novel way to activate PMS for contaminant removal using industrial polyphosphate wastewaters. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/28142111/Significantly_enhanced_base_activation_of_peroxymonosulfate_by_polyphosphates:_Kinetics_and_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(17)30112-1 DB - PRIME DP - Unbound Medicine ER -