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Biodegradability enhancement of a pesticide-containing bio-treated wastewater using a solar photo-Fenton treatment step followed by a biological oxidation process.
Water Res. 2012 Oct 01; 46(15):4599-613.WR

Abstract

This work proposes an efficient combined treatment for the decontamination of a pesticide-containing wastewater resulting from phytopharmaceutical plastic containers washing, presenting a moderate organic load (COD=1662-1960 mg O₂ L⁻¹; DOC=513-696 mg C L⁻¹), with a high biodegradable organic carbon fraction (81%; BOD₅=1350-1600 mg O₂ L⁻¹) and a remaining recalcitrant organic carbon mainly due to pesticides. Nineteen pesticides were quantified by LC-MS/MS at concentrations between 0.02 and 45 mg L⁻¹ (14-19% of DOC). The decontamination strategy involved a sequential three-step treatment: (a) biological oxidation process, leading to almost complete removal of the biodegradable organic carbon fraction; (b) solar photo-Fenton process using CPCs, enhancing the bio-treated wastewater biodegradability, mainly due to pesticides degradation into low-molecular-weight carboxylate anions; (c) and a final polishing step to remove the residual biodegradable organic carbon, using a biological oxidation process. Treatment performance was evaluated in terms of mineralization degree (DOC), pesticides content (LC-MS/MS), inorganic ions and low-molecular-weight carboxylate anions (IC) concentrations. The estimated phototreatment energy necessary to reach a biodegradable wastewater, considering pesticides and low-molecular-weight carboxylate anions concentrations, Zahn-Wellens test and BOD₅/COD ratio, was only 2.3 kJ(UV) L⁻¹ (45 min of photo-Fenton at a constant solar UV power of 30 W m⁻²), consuming 16 mM of H₂O₂, which pointed to 52% mineralization and an abatement higher than 86% for 18 pesticides. The biological oxidation/solar photo-Fenton/biological oxidation treatment system achieved pesticide removals below the respective detection limits and 79% mineralization, leading to a COD value lower than 150 mg O₂ L⁻¹, which is in agreement with Portuguese discharge limits regarding water bodies.

Authors+Show Affiliations

LSRE-Laboratory of Separation and Reaction Engineering-Associate Laboratory LSRE/LCM, Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal. vilar@fe.up.ptNo 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

22796005

Citation

Vilar, Vítor J P., et al. "Biodegradability Enhancement of a Pesticide-containing Bio-treated Wastewater Using a Solar photo-Fenton Treatment Step Followed By a Biological Oxidation Process." Water Research, vol. 46, no. 15, 2012, pp. 4599-613.
Vilar VJ, Moreira FC, Ferreira AC, et al. Biodegradability enhancement of a pesticide-containing bio-treated wastewater using a solar photo-Fenton treatment step followed by a biological oxidation process. Water Res. 2012;46(15):4599-613.
Vilar, V. J., Moreira, F. C., Ferreira, A. C., Sousa, M. A., Gonçalves, C., Alpendurada, M. F., & Boaventura, R. A. (2012). Biodegradability enhancement of a pesticide-containing bio-treated wastewater using a solar photo-Fenton treatment step followed by a biological oxidation process. Water Research, 46(15), 4599-613. https://doi.org/10.1016/j.watres.2012.06.038
Vilar VJ, et al. Biodegradability Enhancement of a Pesticide-containing Bio-treated Wastewater Using a Solar photo-Fenton Treatment Step Followed By a Biological Oxidation Process. Water Res. 2012 Oct 1;46(15):4599-613. PubMed PMID: 22796005.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Biodegradability enhancement of a pesticide-containing bio-treated wastewater using a solar photo-Fenton treatment step followed by a biological oxidation process. AU - Vilar,Vítor J P, AU - Moreira,Francisca C, AU - Ferreira,Ana C C, AU - Sousa,M A, AU - Gonçalves,C, AU - Alpendurada,M F, AU - Boaventura,Rui A R, Y1 - 2012/07/03/ PY - 2012/05/07/received PY - 2012/06/16/revised PY - 2012/06/25/accepted PY - 2012/7/17/entrez PY - 2012/7/17/pubmed PY - 2012/11/14/medline SP - 4599 EP - 613 JF - Water research JO - Water Res VL - 46 IS - 15 N2 - This work proposes an efficient combined treatment for the decontamination of a pesticide-containing wastewater resulting from phytopharmaceutical plastic containers washing, presenting a moderate organic load (COD=1662-1960 mg O₂ L⁻¹; DOC=513-696 mg C L⁻¹), with a high biodegradable organic carbon fraction (81%; BOD₅=1350-1600 mg O₂ L⁻¹) and a remaining recalcitrant organic carbon mainly due to pesticides. Nineteen pesticides were quantified by LC-MS/MS at concentrations between 0.02 and 45 mg L⁻¹ (14-19% of DOC). The decontamination strategy involved a sequential three-step treatment: (a) biological oxidation process, leading to almost complete removal of the biodegradable organic carbon fraction; (b) solar photo-Fenton process using CPCs, enhancing the bio-treated wastewater biodegradability, mainly due to pesticides degradation into low-molecular-weight carboxylate anions; (c) and a final polishing step to remove the residual biodegradable organic carbon, using a biological oxidation process. Treatment performance was evaluated in terms of mineralization degree (DOC), pesticides content (LC-MS/MS), inorganic ions and low-molecular-weight carboxylate anions (IC) concentrations. The estimated phototreatment energy necessary to reach a biodegradable wastewater, considering pesticides and low-molecular-weight carboxylate anions concentrations, Zahn-Wellens test and BOD₅/COD ratio, was only 2.3 kJ(UV) L⁻¹ (45 min of photo-Fenton at a constant solar UV power of 30 W m⁻²), consuming 16 mM of H₂O₂, which pointed to 52% mineralization and an abatement higher than 86% for 18 pesticides. The biological oxidation/solar photo-Fenton/biological oxidation treatment system achieved pesticide removals below the respective detection limits and 79% mineralization, leading to a COD value lower than 150 mg O₂ L⁻¹, which is in agreement with Portuguese discharge limits regarding water bodies. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/22796005/Biodegradability_enhancement_of_a_pesticide_containing_bio_treated_wastewater_using_a_solar_photo_Fenton_treatment_step_followed_by_a_biological_oxidation_process_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(12)00452-6 DB - PRIME DP - Unbound Medicine ER -