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[Study on the degradation of AO7 by UV/K2S2O8, system: kinetics and pathways].
Huan Jing Ke Xue. 2010 Jul; 31(7):1533-7.HJ

Abstract

The UV photolysis of S2O8(2-) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4(*-)). The effect of oxidant K2S2O8 concentration, the initial pH of solution and various inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) were investigated using AO7, a kind of azo dye, as a model pollutant. The degradation kinetics of AO7 followed pseudo first-order kinetics and reaction rates related to PMS concentrations. When the initial concentration of AO7 was 0.14 mmol/L, the optimal molar ratio of oxidant K2S2O8 to pollutants AO7 was 20. The effect of initial pH had great effect on the AO7 degradation rate during UV/K2S2O8 system. Increasing system pH results in the formation of *OH from SO4(*-). The effects of four inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) all had some negative effect on the degradation of AO7. Based on the results of GC/MS, three main intermediates (2-naphthalenol, coumarin and 1,2-benzenedicarboxylic acid) were identified, thus the degradation pathway for SO4(*-) induced by UV/K2S2O8 was proposed accordingly.

Authors+Show Affiliations

Institute of Environmental Resource & Soil Fertilizer, Zhejiang Academy of Agricultural Sciences, Hangzhou 310021, China. xiaoyangchen@yahoo.cnNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't

Language

chi

PubMed ID

20825022

Citation

Chen, Xiao-yang, et al. "[Study On the Degradation of AO7 By UV/K2S2O8, System: Kinetics and Pathways]." Huan Jing Ke Xue= Huanjing Kexue, vol. 31, no. 7, 2010, pp. 1533-7.
Chen XY, Wang WP, Zhu FX, et al. [Study on the degradation of AO7 by UV/K2S2O8, system: kinetics and pathways]. Huan Jing Ke Xue. 2010;31(7):1533-7.
Chen, X. Y., Wang, W. P., Zhu, F. X., Hong, C. L., & Xue, Z. Y. (2010). [Study on the degradation of AO7 by UV/K2S2O8, system: kinetics and pathways]. Huan Jing Ke Xue= Huanjing Kexue, 31(7), 1533-7.
Chen XY, et al. [Study On the Degradation of AO7 By UV/K2S2O8, System: Kinetics and Pathways]. Huan Jing Ke Xue. 2010;31(7):1533-7. PubMed PMID: 20825022.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - [Study on the degradation of AO7 by UV/K2S2O8, system: kinetics and pathways]. AU - Chen,Xiao-yang, AU - Wang,Wei-ping, AU - Zhu,Feng-xiang, AU - Hong,Chun-lai, AU - Xue,Zhi-yong, PY - 2010/9/10/entrez PY - 2010/9/10/pubmed PY - 2011/5/27/medline SP - 1533 EP - 7 JF - Huan jing ke xue= Huanjing kexue JO - Huan Jing Ke Xue VL - 31 IS - 7 N2 - The UV photolysis of S2O8(2-) is a novel advanced oxidation technologies (AOTs), which leads to the formation of strong oxidizing radicals, sulfate radicals (SO4(*-)). The effect of oxidant K2S2O8 concentration, the initial pH of solution and various inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) were investigated using AO7, a kind of azo dye, as a model pollutant. The degradation kinetics of AO7 followed pseudo first-order kinetics and reaction rates related to PMS concentrations. When the initial concentration of AO7 was 0.14 mmol/L, the optimal molar ratio of oxidant K2S2O8 to pollutants AO7 was 20. The effect of initial pH had great effect on the AO7 degradation rate during UV/K2S2O8 system. Increasing system pH results in the formation of *OH from SO4(*-). The effects of four inorganic anions (H2PO4-, HCO3-, NO3- and Cl-) all had some negative effect on the degradation of AO7. Based on the results of GC/MS, three main intermediates (2-naphthalenol, coumarin and 1,2-benzenedicarboxylic acid) were identified, thus the degradation pathway for SO4(*-) induced by UV/K2S2O8 was proposed accordingly. SN - 0250-3301 UR - https://www.unboundmedicine.com/medline/citation/20825022/[Study_on_the_degradation_of_AO7_by_UV/K2S2O8_system:_kinetics_and_pathways]_ DB - PRIME DP - Unbound Medicine ER -