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Sonophotocatalytic degradation of alazine and gesaprim commercial herbicides in TiO2 slurry.
Chemosphere. 2008 Mar; 71(5):982-9.C

Abstract

The photocatalytic degradation of alazine and gesaprim commercial herbicides was carried out in aqueous TiO(2) suspensions under UV light (15W, 352 nm). Degradation of these herbicides was also observed by the combined effects of photocatalysis with sonolysis (sonophotocatalysis) using an ultrasound source of 20kHz. Degradation profiles were recorded by measuring the concentration of the active compounds present in the alazine (alachlor and atrazine) and gesaprim (atrazine) by HPLC as a function of irradiation time (sound and/or light). Over 90% of the active component in the gesaprim was abated and those in alazine were completely degraded. The content of total organic carbon and chemical oxygen demand was also monitored. Mineralization of the commercial herbicides was achieved. Over 80% of chemical oxygen demand abatement was attained for both herbicides with sonophotocatalysis at 150 min of irradiation time. The photocatalytic degradation of the herbicides followed a pseudo-first order kinetics and their rate constant was increased by the combined effects of sonolysis.

Authors+Show Affiliations

Posgrado en Ingeniería y Ciencias Aplicadas, FCQeI-CIICAp, Universidad Autónoma del Estado de Morelos, Avenida Universidad 1001, Col. Chamilpa, Cuernavaca, Morelos 62209, México.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

18083212

Citation

Bahena, Cristina Lizama, et al. "Sonophotocatalytic Degradation of Alazine and Gesaprim Commercial Herbicides in TiO2 Slurry." Chemosphere, vol. 71, no. 5, 2008, pp. 982-9.
Bahena CL, Martínez SS, Guzmán DM, et al. Sonophotocatalytic degradation of alazine and gesaprim commercial herbicides in TiO2 slurry. Chemosphere. 2008;71(5):982-9.
Bahena, C. L., Martínez, S. S., Guzmán, D. M., & Del Refugio Trejo Hernández, M. (2008). Sonophotocatalytic degradation of alazine and gesaprim commercial herbicides in TiO2 slurry. Chemosphere, 71(5), 982-9.
Bahena CL, et al. Sonophotocatalytic Degradation of Alazine and Gesaprim Commercial Herbicides in TiO2 Slurry. Chemosphere. 2008;71(5):982-9. PubMed PMID: 18083212.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Sonophotocatalytic degradation of alazine and gesaprim commercial herbicides in TiO2 slurry. AU - Bahena,Cristina Lizama, AU - Martínez,Susana Silva, AU - Guzmán,Daniel Morales, AU - Del Refugio Trejo Hernández,Ma, Y1 - 2008/02/20/ PY - 2007/07/30/received PY - 2007/11/02/revised PY - 2007/11/02/accepted PY - 2007/12/18/pubmed PY - 2008/7/18/medline PY - 2007/12/18/entrez SP - 982 EP - 9 JF - Chemosphere JO - Chemosphere VL - 71 IS - 5 N2 - The photocatalytic degradation of alazine and gesaprim commercial herbicides was carried out in aqueous TiO(2) suspensions under UV light (15W, 352 nm). Degradation of these herbicides was also observed by the combined effects of photocatalysis with sonolysis (sonophotocatalysis) using an ultrasound source of 20kHz. Degradation profiles were recorded by measuring the concentration of the active compounds present in the alazine (alachlor and atrazine) and gesaprim (atrazine) by HPLC as a function of irradiation time (sound and/or light). Over 90% of the active component in the gesaprim was abated and those in alazine were completely degraded. The content of total organic carbon and chemical oxygen demand was also monitored. Mineralization of the commercial herbicides was achieved. Over 80% of chemical oxygen demand abatement was attained for both herbicides with sonophotocatalysis at 150 min of irradiation time. The photocatalytic degradation of the herbicides followed a pseudo-first order kinetics and their rate constant was increased by the combined effects of sonolysis. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/18083212/Sonophotocatalytic_degradation_of_alazine_and_gesaprim_commercial_herbicides_in_TiO2_slurry_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(07)01376-8 DB - PRIME DP - Unbound Medicine ER -