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Degradation of atenolol by UV/peroxymonosulfate: kinetics, effect of operational parameters and mechanism.
Chemosphere. 2013 Nov; 93(11):2717-24.C

Abstract

Photoactivation of peroxymonosulfate (PMS) with UV (254nm) irradiation was used to generate the SO4(-)-based advanced oxidation process, which was adopted to degrade atenolol (ATL) in water. The second-order reaction rate constants of ATL with HO and SO4(-) were determined, and the effects of operational parameters (dose of PMS, solution pH, HCO3(-), humic acids (HA), and N2 bubbling) were evaluated as well. Finally the main transformation intermediates were identified and possible degradation pathways were proposed. The results showed that there was a linear positive correlation between the degradation rate of ATL and specific dose of PMS (1-16M PMS/M ATL). Increasing solution pH from 3 to 9 promoted elimination of ATL due to the pH-dependent effect of PMS photodecomposition, while further pH increase from 9 to 11 caused slowing down of degradation because of apparent conversion of HO to SO4(-). 1-8mM HCO3(-) exerted no more than 5.3% inhibition effect on ATL destruction, suggesting HCO3(-) was a weak inhibitor. Absorption (or complexation) and photosensitized oxidation induced by HA improved ATL degradation during the first minute of degradation process, whereas photon competition and radical scavenging effects became the leading role afterward. Bubbling with nitrogen enhanced the degradation rate due to the stripping of dissolved oxygen. Hydroxylation of aromatic ring, cleavage of ether bond, oxidation of primary and secondary amine moieties, and dimerization were involved in the degradation mechanism of ATL by UV/PMS.

Authors+Show Affiliations

Institute of Municipal Engineering, Zhejiang University, Hangzhou 310058, PR China.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

24083900

Citation

Liu, Xiaowei, et al. "Degradation of Atenolol By UV/peroxymonosulfate: Kinetics, Effect of Operational Parameters and Mechanism." Chemosphere, vol. 93, no. 11, 2013, pp. 2717-24.
Liu X, Zhang T, Zhou Y, et al. Degradation of atenolol by UV/peroxymonosulfate: kinetics, effect of operational parameters and mechanism. Chemosphere. 2013;93(11):2717-24.
Liu, X., Zhang, T., Zhou, Y., Fang, L., & Shao, Y. (2013). Degradation of atenolol by UV/peroxymonosulfate: kinetics, effect of operational parameters and mechanism. Chemosphere, 93(11), 2717-24. https://doi.org/10.1016/j.chemosphere.2013.08.090
Liu X, et al. Degradation of Atenolol By UV/peroxymonosulfate: Kinetics, Effect of Operational Parameters and Mechanism. Chemosphere. 2013;93(11):2717-24. PubMed PMID: 24083900.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of atenolol by UV/peroxymonosulfate: kinetics, effect of operational parameters and mechanism. AU - Liu,Xiaowei, AU - Zhang,Tuqiao, AU - Zhou,Yongchao, AU - Fang,Lei, AU - Shao,Yu, Y1 - 2013/09/29/ PY - 2013/03/04/received PY - 2013/08/23/revised PY - 2013/08/26/accepted PY - 2013/10/3/entrez PY - 2013/10/3/pubmed PY - 2014/5/16/medline KW - Atenolol KW - Degradation mechanism KW - Influencing parameters KW - Kinetics KW - Sulfate radical SP - 2717 EP - 24 JF - Chemosphere JO - Chemosphere VL - 93 IS - 11 N2 - Photoactivation of peroxymonosulfate (PMS) with UV (254nm) irradiation was used to generate the SO4(-)-based advanced oxidation process, which was adopted to degrade atenolol (ATL) in water. The second-order reaction rate constants of ATL with HO and SO4(-) were determined, and the effects of operational parameters (dose of PMS, solution pH, HCO3(-), humic acids (HA), and N2 bubbling) were evaluated as well. Finally the main transformation intermediates were identified and possible degradation pathways were proposed. The results showed that there was a linear positive correlation between the degradation rate of ATL and specific dose of PMS (1-16M PMS/M ATL). Increasing solution pH from 3 to 9 promoted elimination of ATL due to the pH-dependent effect of PMS photodecomposition, while further pH increase from 9 to 11 caused slowing down of degradation because of apparent conversion of HO to SO4(-). 1-8mM HCO3(-) exerted no more than 5.3% inhibition effect on ATL destruction, suggesting HCO3(-) was a weak inhibitor. Absorption (or complexation) and photosensitized oxidation induced by HA improved ATL degradation during the first minute of degradation process, whereas photon competition and radical scavenging effects became the leading role afterward. Bubbling with nitrogen enhanced the degradation rate due to the stripping of dissolved oxygen. Hydroxylation of aromatic ring, cleavage of ether bond, oxidation of primary and secondary amine moieties, and dimerization were involved in the degradation mechanism of ATL by UV/PMS. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/24083900/Degradation_of_atenolol_by_UV/peroxymonosulfate:_kinetics_effect_of_operational_parameters_and_mechanism_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(13)01246-0 DB - PRIME DP - Unbound Medicine ER -