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Photocatalytic degradation of five sulfonylurea herbicides in aqueous semiconductor suspensions under natural sunlight.
Chemosphere. 2012 May; 87(8):954-61.C

Abstract

In the present study, the photocatalytic degradation of five sulfonylurea herbicides (chlorsulfuron, flazasulfuron, nicosulfuron, sulfosulfuron and triasulfuron) has been investigated in aqueous suspensions of zinc oxide (ZnO), tungsten (VI) oxide (WO(3)), tin (IV) oxide (SnO(2)) and zinc sulfide (ZnS) at pilot plant scale under natural sunlight. Photocatalytic experiments, especially those involving ZnO photocatalysis, showed that the addition of semiconductors in tandem with the oxidant (Na(2)S(2)O(8)) strongly enhances the degradation rate of the herbicides in comparisons carried out with photolytic tests. The degradation of the herbicides follows a first order kinetics according to the Langmuir-Hinshelwood model. In our conditions, the amount of time required for 50% of the initial pesticide concentration to dissipate (t(½)) ranged from 8 to 27 min (t(30W)=0.3-1.2 min) for sulfosulfuron and chlorsulfuron, respectively in the ZnO/Na(2)S(2)O(8) system. None of the studied herbicides was found after 120 min of illumination (except chlorsulfuron, 0.2 μg L(-1)).

Authors+Show Affiliations

Equipo de Calidad Alimentaria, Instituto Murciano de Investigación y Desarrollo Agrario y Alimentario, C/Mayor s/n, La Alberca, 30150 Murcia, Spain. jose.fenoll@carm.esNo 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

eng

PubMed ID

22356857

Citation

Fenoll, José, et al. "Photocatalytic Degradation of Five Sulfonylurea Herbicides in Aqueous Semiconductor Suspensions Under Natural Sunlight." Chemosphere, vol. 87, no. 8, 2012, pp. 954-61.
Fenoll J, Hellín P, Flores P, et al. Photocatalytic degradation of five sulfonylurea herbicides in aqueous semiconductor suspensions under natural sunlight. Chemosphere. 2012;87(8):954-61.
Fenoll, J., Hellín, P., Flores, P., Martínez, C. M., & Navarro, S. (2012). Photocatalytic degradation of five sulfonylurea herbicides in aqueous semiconductor suspensions under natural sunlight. Chemosphere, 87(8), 954-61. https://doi.org/10.1016/j.chemosphere.2012.01.056
Fenoll J, et al. Photocatalytic Degradation of Five Sulfonylurea Herbicides in Aqueous Semiconductor Suspensions Under Natural Sunlight. Chemosphere. 2012;87(8):954-61. PubMed PMID: 22356857.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Photocatalytic degradation of five sulfonylurea herbicides in aqueous semiconductor suspensions under natural sunlight. AU - Fenoll,José, AU - Hellín,Pilar, AU - Flores,Pilar, AU - Martínez,Carmen María, AU - Navarro,Simón, Y1 - 2012/02/21/ PY - 2011/11/14/received PY - 2012/01/25/revised PY - 2012/01/27/accepted PY - 2012/2/24/entrez PY - 2012/2/24/pubmed PY - 2012/7/21/medline SP - 954 EP - 61 JF - Chemosphere JO - Chemosphere VL - 87 IS - 8 N2 - In the present study, the photocatalytic degradation of five sulfonylurea herbicides (chlorsulfuron, flazasulfuron, nicosulfuron, sulfosulfuron and triasulfuron) has been investigated in aqueous suspensions of zinc oxide (ZnO), tungsten (VI) oxide (WO(3)), tin (IV) oxide (SnO(2)) and zinc sulfide (ZnS) at pilot plant scale under natural sunlight. Photocatalytic experiments, especially those involving ZnO photocatalysis, showed that the addition of semiconductors in tandem with the oxidant (Na(2)S(2)O(8)) strongly enhances the degradation rate of the herbicides in comparisons carried out with photolytic tests. The degradation of the herbicides follows a first order kinetics according to the Langmuir-Hinshelwood model. In our conditions, the amount of time required for 50% of the initial pesticide concentration to dissipate (t(½)) ranged from 8 to 27 min (t(30W)=0.3-1.2 min) for sulfosulfuron and chlorsulfuron, respectively in the ZnO/Na(2)S(2)O(8) system. None of the studied herbicides was found after 120 min of illumination (except chlorsulfuron, 0.2 μg L(-1)). SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/22356857/Photocatalytic_degradation_of_five_sulfonylurea_herbicides_in_aqueous_semiconductor_suspensions_under_natural_sunlight_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(12)00148-8 DB - PRIME DP - Unbound Medicine ER -