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Degradation of alachlor and pyrimethanil by combined photo-Fenton and biological oxidation.
J Hazard Mater. 2008 Jun 30; 155(1-2):342-9.JH

Abstract

Biodegradability of aqueous solutions of the herbicide alachlor and the fungicide pyrimethanil, partly treated by photo-Fenton, and the effect of photoreaction intermediates on growth and DOC removal kinetics of the bacteria Pseudomonas putida CECT 324 are demonstrated. Toxicity of 30-120 mg L(-1) alachlor and pyrimethanil has been assayed in P. putida. The biodegradability of photocatalytic intermediates found at different photo-treatment times was evaluated for each pesticide. At a selected time during batch-mode phototreatment, larger-scale biodegradation kinetics were analysed in a 12 L bubble column bioreactor. Both alachlor and pyrimethanil are non-toxic for P. putida CECT 324 at the test concentrations, but they are not biodegradable. A approximately 100 min photo-Fenton pre-treatment was enough to enhance biodegradability, the biological oxidation response being dependent on the pesticide tested. The different alachlor and pyrimethanil respiration and carbon uptake rates in pre-treated solutions are related to change in the growth kinetics of P. putida. Reproducible results have shown that P. putida could be a suitable microorganism for determining photo-Fenton pre-treatment time.

Authors+Show Affiliations

Departamento de Ingeniería Química, Universidad de Almería, 04120 Almería, Spain.No affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

18162295

Citation

Ballesteros Martín, M M., et al. "Degradation of Alachlor and Pyrimethanil By Combined photo-Fenton and Biological Oxidation." Journal of Hazardous Materials, vol. 155, no. 1-2, 2008, pp. 342-9.
Ballesteros Martín MM, Sánchez Pérez JA, García Sánchez JL, et al. Degradation of alachlor and pyrimethanil by combined photo-Fenton and biological oxidation. J Hazard Mater. 2008;155(1-2):342-9.
Ballesteros Martín, M. M., Sánchez Pérez, J. A., García Sánchez, J. L., Montes de Oca, L., Casas López, J. L., Oller, I., & Malato Rodríguez, S. (2008). Degradation of alachlor and pyrimethanil by combined photo-Fenton and biological oxidation. Journal of Hazardous Materials, 155(1-2), 342-9.
Ballesteros Martín MM, et al. Degradation of Alachlor and Pyrimethanil By Combined photo-Fenton and Biological Oxidation. J Hazard Mater. 2008 Jun 30;155(1-2):342-9. PubMed PMID: 18162295.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of alachlor and pyrimethanil by combined photo-Fenton and biological oxidation. AU - Ballesteros Martín,M M, AU - Sánchez Pérez,J A, AU - García Sánchez,J L, AU - Montes de Oca,L, AU - Casas López,J L, AU - Oller,I, AU - Malato Rodríguez,S, Y1 - 2007/11/23/ PY - 2007/09/28/received PY - 2007/11/15/revised PY - 2007/11/20/accepted PY - 2007/12/29/pubmed PY - 2008/8/2/medline PY - 2007/12/29/entrez SP - 342 EP - 9 JF - Journal of hazardous materials JO - J Hazard Mater VL - 155 IS - 1-2 N2 - Biodegradability of aqueous solutions of the herbicide alachlor and the fungicide pyrimethanil, partly treated by photo-Fenton, and the effect of photoreaction intermediates on growth and DOC removal kinetics of the bacteria Pseudomonas putida CECT 324 are demonstrated. Toxicity of 30-120 mg L(-1) alachlor and pyrimethanil has been assayed in P. putida. The biodegradability of photocatalytic intermediates found at different photo-treatment times was evaluated for each pesticide. At a selected time during batch-mode phototreatment, larger-scale biodegradation kinetics were analysed in a 12 L bubble column bioreactor. Both alachlor and pyrimethanil are non-toxic for P. putida CECT 324 at the test concentrations, but they are not biodegradable. A approximately 100 min photo-Fenton pre-treatment was enough to enhance biodegradability, the biological oxidation response being dependent on the pesticide tested. The different alachlor and pyrimethanil respiration and carbon uptake rates in pre-treated solutions are related to change in the growth kinetics of P. putida. Reproducible results have shown that P. putida could be a suitable microorganism for determining photo-Fenton pre-treatment time. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/18162295/Degradation_of_alachlor_and_pyrimethanil_by_combined_photo_Fenton_and_biological_oxidation_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)01696-2 DB - PRIME DP - Unbound Medicine ER -