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Assessment of photo-Fenton and biological treatment coupling for Diuron and Linuron removal from water.
Water Res. 2006 Jul; 40(13):2533-40.WR

Abstract

The coupling of photo-Fenton (chemical) and biological treatments has been used for the removal of Diuron and Linuron herbicides from water. The chemical reaction was employed as a pre-treatment step for the conversion of the toxic and non-biodegradable herbicides into biodegradable intermediates that were subsequently removed by means of a biological sequencing batch reactor (SBR). Multivariate experimental design was used to select four photo-Fenton reagent dose combinations for the coupling experiments. Concentrations of hydrogen peroxide between 10 and 250 mg L(-1), and iron (II) concentrations between 2 and 20 mg L(-1) have been tested. 15.9 mg L(-1) of Fe(II) and 202 mg L(-1) of H(2)O(2) were needed to convert initial toxic and non-biodegradable herbicides into suitable intermediates for a subsequent biological treatment. Detrimental effects due to the excess of reactants were detected. Chemical oxygen demand (COD), average oxidation state (AOS), total organic carbon (TOC) and hydrogen peroxide concentration are the parameters used to trace the experiments course. Also, toxicity (EC(50)(15)) and biodegradability (BOD(5)/COD) tests were carried out at the end of each chemical oxidation. Complete disappearance of the herbicides from water was observed after the chemical treatment, while 3,4-dichloroaniline and 3,4-dichlorophenyl isocyanate were identified as the main by-products of the degradation process. Complete TOC removal was achieved after biological treatment in a SBR using a hydraulic retention time (HRT) of 2 days.

Authors+Show Affiliations

Departament de Química, Universitat Autónoma de Barcelona, 08193 Bellaterra, Spain.No affiliation info availableNo affiliation info available

Pub Type(s)

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

Language

eng

PubMed ID

16780918

Citation

Farré, María José, et al. "Assessment of photo-Fenton and Biological Treatment Coupling for Diuron and Linuron Removal From Water." Water Research, vol. 40, no. 13, 2006, pp. 2533-40.
Farré MJ, Doménech X, Peral J. Assessment of photo-Fenton and biological treatment coupling for Diuron and Linuron removal from water. Water Res. 2006;40(13):2533-40.
Farré, M. J., Doménech, X., & Peral, J. (2006). Assessment of photo-Fenton and biological treatment coupling for Diuron and Linuron removal from water. Water Research, 40(13), 2533-40.
Farré MJ, Doménech X, Peral J. Assessment of photo-Fenton and Biological Treatment Coupling for Diuron and Linuron Removal From Water. Water Res. 2006;40(13):2533-40. PubMed PMID: 16780918.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Assessment of photo-Fenton and biological treatment coupling for Diuron and Linuron removal from water. AU - Farré,María José, AU - Doménech,Xavier, AU - Peral,José, Y1 - 2006/06/14/ PY - 2005/11/18/received PY - 2006/04/18/revised PY - 2006/04/26/accepted PY - 2006/6/20/pubmed PY - 2006/12/9/medline PY - 2006/6/20/entrez SP - 2533 EP - 40 JF - Water research JO - Water Res VL - 40 IS - 13 N2 - The coupling of photo-Fenton (chemical) and biological treatments has been used for the removal of Diuron and Linuron herbicides from water. The chemical reaction was employed as a pre-treatment step for the conversion of the toxic and non-biodegradable herbicides into biodegradable intermediates that were subsequently removed by means of a biological sequencing batch reactor (SBR). Multivariate experimental design was used to select four photo-Fenton reagent dose combinations for the coupling experiments. Concentrations of hydrogen peroxide between 10 and 250 mg L(-1), and iron (II) concentrations between 2 and 20 mg L(-1) have been tested. 15.9 mg L(-1) of Fe(II) and 202 mg L(-1) of H(2)O(2) were needed to convert initial toxic and non-biodegradable herbicides into suitable intermediates for a subsequent biological treatment. Detrimental effects due to the excess of reactants were detected. Chemical oxygen demand (COD), average oxidation state (AOS), total organic carbon (TOC) and hydrogen peroxide concentration are the parameters used to trace the experiments course. Also, toxicity (EC(50)(15)) and biodegradability (BOD(5)/COD) tests were carried out at the end of each chemical oxidation. Complete disappearance of the herbicides from water was observed after the chemical treatment, while 3,4-dichloroaniline and 3,4-dichlorophenyl isocyanate were identified as the main by-products of the degradation process. Complete TOC removal was achieved after biological treatment in a SBR using a hydraulic retention time (HRT) of 2 days. SN - 0043-1354 UR - https://www.unboundmedicine.com/medline/citation/16780918/Assessment_of_photo_Fenton_and_biological_treatment_coupling_for_Diuron_and_Linuron_removal_from_water_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(06)00250-8 DB - PRIME DP - Unbound Medicine ER -