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Degradation of thiacloprid in aqueous solution by UV and UV/H2O2 treatments.
Chemosphere. 2010 Sep; 81(1):114-9.C

Abstract

Although some studies concerning flash photolysis and photocatalytic ozonation of thiacloprid have already been published, no complete investigation and explanation of the effects of thiacloprid photodegradation under the conditions of UV and UV/H(2)O(2) (high-pressure mercury lamp and H(2)O(2)) have been reported yet. The photochemical degradation of thiacloprid (0.32 mM) was studied under a variety of solution conditions, by varying the initial concentrations of H(2)O(2) from 0 to 162 mM and the pH from 2.8 to 9. In the UV/H(2)O(2) system, thiacloprid reacted rapidly, the maximum first-order rate constant (2.7 x 10(-2)min(-1), r=0.9996) being observed at the H(2)O(2)/thiacloprid molar ratio of 220 and pH 2.8. Under these conditions, 97% of the thiacloprid was removed in about 120 min. The thiacloprid degradation is accompanied by the formation of a number of ionic byproducts (Cl(-), acetate, formate, SO(4)(2-), and NH(4)(+)) and organic intermediates, so that after 35 h of irradiation, 17% of organic carbon remained non-degraded. The application of UV radiation, or H(2)O(2) alone, yielded no significant thiacloprid degradation. The study of the rate of removal of thiacloprid from natural water showed that it is dominantly influenced by the presence of HCO(3)(-).

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Authors+Show Affiliations

Abramović BF
Faculty of Sciences, Department of Chemistry, Biochemistry and Environmental Protection, Trg D. Obradovića 3, 21000 Novi Sad, Serbia. biljana.abramovic@dh.uns.ac.rs
Banić ND
No affiliation info available
Sojić DV
No affiliation info available

MeSH

Environmental Restoration and RemediationFresh WaterHydrogen PeroxideHydrogen-Ion ConcentrationNeonicotinoidsPhotolysisPyridinesThiazinesUltraviolet RaysWater Pollutants, Chemical

Pub Type(s)

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

Language

eng

PubMed ID

20692009

Citation

Abramović, Biljana F., et al. "Degradation of Thiacloprid in Aqueous Solution By UV and UV/H2O2 Treatments." Chemosphere, vol. 81, no. 1, 2010, pp. 114-9.
Abramović BF, Banić ND, Sojić DV. Degradation of thiacloprid in aqueous solution by UV and UV/H2O2 treatments. Chemosphere. 2010;81(1):114-9.
Abramović, B. F., Banić, N. D., & Sojić, D. V. (2010). Degradation of thiacloprid in aqueous solution by UV and UV/H2O2 treatments. Chemosphere, 81(1), 114-9. https://doi.org/10.1016/j.chemosphere.2010.07.016
Abramović BF, Banić ND, Sojić DV. Degradation of Thiacloprid in Aqueous Solution By UV and UV/H2O2 Treatments. Chemosphere. 2010;81(1):114-9. PubMed PMID: 20692009.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of thiacloprid in aqueous solution by UV and UV/H2O2 treatments. AU - Abramović,Biljana F, AU - Banić,Nemanja D, AU - Sojić,Daniela V, Y1 - 2010/08/06/ PY - 2010/04/26/received PY - 2010/07/09/revised PY - 2010/07/12/accepted PY - 2010/8/10/entrez PY - 2010/8/10/pubmed PY - 2010/11/6/medline SP - 114 EP - 9 JF - Chemosphere JO - Chemosphere VL - 81 IS - 1 N2 - Although some studies concerning flash photolysis and photocatalytic ozonation of thiacloprid have already been published, no complete investigation and explanation of the effects of thiacloprid photodegradation under the conditions of UV and UV/H(2)O(2) (high-pressure mercury lamp and H(2)O(2)) have been reported yet. The photochemical degradation of thiacloprid (0.32 mM) was studied under a variety of solution conditions, by varying the initial concentrations of H(2)O(2) from 0 to 162 mM and the pH from 2.8 to 9. In the UV/H(2)O(2) system, thiacloprid reacted rapidly, the maximum first-order rate constant (2.7 x 10(-2)min(-1), r=0.9996) being observed at the H(2)O(2)/thiacloprid molar ratio of 220 and pH 2.8. Under these conditions, 97% of the thiacloprid was removed in about 120 min. The thiacloprid degradation is accompanied by the formation of a number of ionic byproducts (Cl(-), acetate, formate, SO(4)(2-), and NH(4)(+)) and organic intermediates, so that after 35 h of irradiation, 17% of organic carbon remained non-degraded. The application of UV radiation, or H(2)O(2) alone, yielded no significant thiacloprid degradation. The study of the rate of removal of thiacloprid from natural water showed that it is dominantly influenced by the presence of HCO(3)(-). SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/20692009/Degradation_of_thiacloprid_in_aqueous_solution_by_UV_and_UV/H2O2_treatments_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(10)00797-6 DB - PRIME DP - Unbound Medicine ER -