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Photodegradation of neonicotinoid insecticides in water by semiconductor oxides.
Environ Sci Pollut Res Int. 2015 Oct; 22(19):15055-66.ES

Abstract

The photocatalytic degradation of three neonicotinoid insecticides (NIs), thiamethoxam (TH), imidacloprid (IM) and acetamiprid (AC), in pure water has been studied using zinc oxide (ZnO) and titanium dioxide (TiO2) as photocatalysts under natural sunlight and artificial light irradiation. Photocatalytic experiments showed that the addition of these chalcogenide oxides in tandem with the electron acceptor (Na2S2O8) strongly enhances the degradation rate of these compounds in comparison with those carried out with ZnO and TiO2 alone and photolytic tests. Comparison of catalysts showed that ZnO is the most efficient for the removal of such insecticides in optimal conditions and at constant volumetric rate of photon absorption. Thus, the complete disappearance of all the studied compounds was achieved after 10 and 30 min of artificial light irradiation, in the ZnO/Na2S2O8 and TiO2/Na2S2O8 systems, respectively. The highest degradation rate was noticed for IM, while the lowest rate constant was obtained for AC under artificial light irradiation. In addition, solar irradiation was more efficient compared to artificial light for the removal of these insecticides from water. The main photocatalytic intermediates detected during the degradation of NIs were identified.

Authors+Show Affiliations

Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain. jose.fenoll@carm.es.Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain.Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain.Departamento de Calidad y Garantía Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario (IMIDA), C/ Mayor s/n. La Alberca, 30150, Murcia, Spain.Departamento de Química Agrícola, Geología y Edafología, Facultad de Química, Universidad de Murcia, Campus Universitario de Espinardo, 30100, Murcia, Spain.

Pub Type(s)

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

Language

eng

PubMed ID

26002372

Citation

Fenoll, José, et al. "Photodegradation of Neonicotinoid Insecticides in Water By Semiconductor Oxides." Environmental Science and Pollution Research International, vol. 22, no. 19, 2015, pp. 15055-66.
Fenoll J, Garrido I, Hellín P, et al. Photodegradation of neonicotinoid insecticides in water by semiconductor oxides. Environ Sci Pollut Res Int. 2015;22(19):15055-66.
Fenoll, J., Garrido, I., Hellín, P., Flores, P., & Navarro, S. (2015). Photodegradation of neonicotinoid insecticides in water by semiconductor oxides. Environmental Science and Pollution Research International, 22(19), 15055-66. https://doi.org/10.1007/s11356-015-4721-2
Fenoll J, et al. Photodegradation of Neonicotinoid Insecticides in Water By Semiconductor Oxides. Environ Sci Pollut Res Int. 2015;22(19):15055-66. PubMed PMID: 26002372.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photodegradation of neonicotinoid insecticides in water by semiconductor oxides. AU - Fenoll,José, AU - Garrido,Isabel, AU - Hellín,Pilar, AU - Flores,Pilar, AU - Navarro,Simón, Y1 - 2015/05/24/ PY - 2015/02/11/received PY - 2015/05/13/accepted PY - 2015/5/24/entrez PY - 2015/5/24/pubmed PY - 2016/5/14/medline KW - Acetamiprid KW - Imidacloprid KW - Photocatalytic oxidation KW - Thiamethoxam KW - TiO2 KW - Water detoxification KW - ZnO SP - 15055 EP - 66 JF - Environmental science and pollution research international JO - Environ Sci Pollut Res Int VL - 22 IS - 19 N2 - The photocatalytic degradation of three neonicotinoid insecticides (NIs), thiamethoxam (TH), imidacloprid (IM) and acetamiprid (AC), in pure water has been studied using zinc oxide (ZnO) and titanium dioxide (TiO2) as photocatalysts under natural sunlight and artificial light irradiation. Photocatalytic experiments showed that the addition of these chalcogenide oxides in tandem with the electron acceptor (Na2S2O8) strongly enhances the degradation rate of these compounds in comparison with those carried out with ZnO and TiO2 alone and photolytic tests. Comparison of catalysts showed that ZnO is the most efficient for the removal of such insecticides in optimal conditions and at constant volumetric rate of photon absorption. Thus, the complete disappearance of all the studied compounds was achieved after 10 and 30 min of artificial light irradiation, in the ZnO/Na2S2O8 and TiO2/Na2S2O8 systems, respectively. The highest degradation rate was noticed for IM, while the lowest rate constant was obtained for AC under artificial light irradiation. In addition, solar irradiation was more efficient compared to artificial light for the removal of these insecticides from water. The main photocatalytic intermediates detected during the degradation of NIs were identified. SN - 1614-7499 UR - https://www.unboundmedicine.com/medline/citation/26002372/Photodegradation_of_neonicotinoid_insecticides_in_water_by_semiconductor_oxides_ L2 - https://dx.doi.org/10.1007/s11356-015-4721-2 DB - PRIME DP - Unbound Medicine ER -