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Combined photo-Fenton and biological oxidation for pesticide degradation: effect of photo-treated intermediates on biodegradation kinetics.
Chemosphere. 2008 Feb; 70(8):1476-83.C

Abstract

Biodegradability of a partially photo-oxidized pesticide mixture is demonstrated and the effect of photo-Fenton treatment time on growth and substrate consumption of the bacteria Pseudomonas putida CECT 324 is shown. Four commercial pesticides, laition, metasystox, sevnol and ultracid, usually employed in citric orchards in eastern Spain, were chosen for these experiments. The active ingredients are, respectively, dimethoate, oxydemeton-methyl, carbaryl and methidathion. Judging by biomass measurements, dissolved organic carbon measurements and biodegradation efficiency, it may be concluded that 90min<t(30W)<110min is the critical point for the photo-Fenton treatment. P. putida is sensitive to photo-produced intermediates giving rise to different kinetic behaviour: longer lag phases, slower growth rates and lower carbon uptake rates. Nonetheless, the percentage of carbon consumption was over 80%, pointing out the biodegradability of the mixture. Biodegradation efficiencies (E(f)) of the photo-reaction intermediates were around 60%, in small 50-ml cultures and in a 12-l bubble column bioreactor. But with the main difference that E(f) in the former took 120h and the same biodegradation was reached in less than 30h in the latter. Therefore, for qualitative results, experiments in flasks might be recommendable, but not for quantitative results for designing purposes.

Authors+Show Affiliations

Departamento de Ingeniería Química, Universidad de Almería, 04120 Almería, Spain. mmenta@ual.esNo affiliation info availableNo affiliation info availableNo affiliation info availableNo 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

17904613

Citation

Ballesteros Martín, M M., et al. "Combined photo-Fenton and Biological Oxidation for Pesticide Degradation: Effect of Photo-treated Intermediates On Biodegradation Kinetics." Chemosphere, vol. 70, no. 8, 2008, pp. 1476-83.
Ballesteros Martín MM, Sánchez Pérez JA, Acién Fernández FG, et al. Combined photo-Fenton and biological oxidation for pesticide degradation: effect of photo-treated intermediates on biodegradation kinetics. Chemosphere. 2008;70(8):1476-83.
Ballesteros Martín, M. M., Sánchez Pérez, J. A., Acién Fernández, F. G., Casas López, J. L., García-Ripoll, A. M., Arques, A., Oller, I., & Malato Rodríguez, S. (2008). Combined photo-Fenton and biological oxidation for pesticide degradation: effect of photo-treated intermediates on biodegradation kinetics. Chemosphere, 70(8), 1476-83.
Ballesteros Martín MM, et al. Combined photo-Fenton and Biological Oxidation for Pesticide Degradation: Effect of Photo-treated Intermediates On Biodegradation Kinetics. Chemosphere. 2008;70(8):1476-83. PubMed PMID: 17904613.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combined photo-Fenton and biological oxidation for pesticide degradation: effect of photo-treated intermediates on biodegradation kinetics. AU - Ballesteros Martín,M M, AU - Sánchez Pérez,J A, AU - Acién Fernández,F G, AU - Casas López,J L, AU - García-Ripoll,A M, AU - Arques,A, AU - Oller,I, AU - Malato Rodríguez,S, Y1 - 2007/09/29/ PY - 2007/06/22/received PY - 2007/08/14/revised PY - 2007/08/16/accepted PY - 2007/10/2/pubmed PY - 2008/4/15/medline PY - 2007/10/2/entrez SP - 1476 EP - 83 JF - Chemosphere JO - Chemosphere VL - 70 IS - 8 N2 - Biodegradability of a partially photo-oxidized pesticide mixture is demonstrated and the effect of photo-Fenton treatment time on growth and substrate consumption of the bacteria Pseudomonas putida CECT 324 is shown. Four commercial pesticides, laition, metasystox, sevnol and ultracid, usually employed in citric orchards in eastern Spain, were chosen for these experiments. The active ingredients are, respectively, dimethoate, oxydemeton-methyl, carbaryl and methidathion. Judging by biomass measurements, dissolved organic carbon measurements and biodegradation efficiency, it may be concluded that 90min<t(30W)<110min is the critical point for the photo-Fenton treatment. P. putida is sensitive to photo-produced intermediates giving rise to different kinetic behaviour: longer lag phases, slower growth rates and lower carbon uptake rates. Nonetheless, the percentage of carbon consumption was over 80%, pointing out the biodegradability of the mixture. Biodegradation efficiencies (E(f)) of the photo-reaction intermediates were around 60%, in small 50-ml cultures and in a 12-l bubble column bioreactor. But with the main difference that E(f) in the former took 120h and the same biodegradation was reached in less than 30h in the latter. Therefore, for qualitative results, experiments in flasks might be recommendable, but not for quantitative results for designing purposes. SN - 0045-6535 UR - https://www.unboundmedicine.com/medline/citation/17904613/Combined_photo_Fenton_and_biological_oxidation_for_pesticide_degradation:_effect_of_photo_treated_intermediates_on_biodegradation_kinetics_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(07)01051-X DB - PRIME DP - Unbound Medicine ER -