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Combined photo-Fenton and biological treatment for Diuron and Linuron removal from water containing humic acid.
J Hazard Mater. 2007 Aug 17; 147(1-2):167-74.JH

Abstract

A combined chemical (photo-Fenton) and biological treatment has been proposed for Diuron and Linuron degradation in water containing natural dissolved organic matter (DOM). Humic acid (HA) was used to simulate the DOM. During the photo-Fenton process ([Fe(II)]=15.9 mg L(-1), [H2O2]=202 mg L(-1), 60 min of UVA irradiation time), the chemical oxygen demand (COD), total organic carbon (TOC), toxicity (EC50(15)) and biodegradability (BOD5/COD) of the generated intermediates were assessed. A reduction of photo-Fenton efficiency was observed when HA was present in solution. This effect has been explained as the result of a UVA light screening as well as a OH* radical quenching process by the HA. After the photo-Fenton process, the initial toxic and non-biodegradable herbicides were transformed into intermediates suitable for a subsequent aerobic biological treatment that was performed in a sequencing batch reactor (SBR). Complete elimination of the intermediates in presence of HA was reached at the end of the chemical-biological coupled system. Biosorption of HA onto the aerobic biomass was characterized. The results indicate that the Freundlich model adequately describes the adsorption of HA, a phenomena that follows a pseudo second-order adsorption kinetic model.

Authors+Show Affiliations

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

Pub Type(s)

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

Language

eng

PubMed ID

17267109

Citation

Farré, María José, et al. "Combined photo-Fenton and Biological Treatment for Diuron and Linuron Removal From Water Containing Humic Acid." Journal of Hazardous Materials, vol. 147, no. 1-2, 2007, pp. 167-74.
Farré MJ, Doménech X, Peral J. Combined photo-Fenton and biological treatment for Diuron and Linuron removal from water containing humic acid. J Hazard Mater. 2007;147(1-2):167-74.
Farré, M. J., Doménech, X., & Peral, J. (2007). Combined photo-Fenton and biological treatment for Diuron and Linuron removal from water containing humic acid. Journal of Hazardous Materials, 147(1-2), 167-74.
Farré MJ, Doménech X, Peral J. Combined photo-Fenton and Biological Treatment for Diuron and Linuron Removal From Water Containing Humic Acid. J Hazard Mater. 2007 Aug 17;147(1-2):167-74. PubMed PMID: 17267109.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Combined photo-Fenton and biological treatment for Diuron and Linuron removal from water containing humic acid. AU - Farré,María José, AU - Doménech,Xavier, AU - Peral,José, Y1 - 2007/01/05/ PY - 2006/09/18/received PY - 2006/12/20/revised PY - 2006/12/22/accepted PY - 2007/2/3/pubmed PY - 2007/12/28/medline PY - 2007/2/3/entrez SP - 167 EP - 74 JF - Journal of hazardous materials JO - J Hazard Mater VL - 147 IS - 1-2 N2 - A combined chemical (photo-Fenton) and biological treatment has been proposed for Diuron and Linuron degradation in water containing natural dissolved organic matter (DOM). Humic acid (HA) was used to simulate the DOM. During the photo-Fenton process ([Fe(II)]=15.9 mg L(-1), [H2O2]=202 mg L(-1), 60 min of UVA irradiation time), the chemical oxygen demand (COD), total organic carbon (TOC), toxicity (EC50(15)) and biodegradability (BOD5/COD) of the generated intermediates were assessed. A reduction of photo-Fenton efficiency was observed when HA was present in solution. This effect has been explained as the result of a UVA light screening as well as a OH* radical quenching process by the HA. After the photo-Fenton process, the initial toxic and non-biodegradable herbicides were transformed into intermediates suitable for a subsequent aerobic biological treatment that was performed in a sequencing batch reactor (SBR). Complete elimination of the intermediates in presence of HA was reached at the end of the chemical-biological coupled system. Biosorption of HA onto the aerobic biomass was characterized. The results indicate that the Freundlich model adequately describes the adsorption of HA, a phenomena that follows a pseudo second-order adsorption kinetic model. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/17267109/Combined_photo_Fenton_and_biological_treatment_for_Diuron_and_Linuron_removal_from_water_containing_humic_acid_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(07)00006-4 DB - PRIME DP - Unbound Medicine ER -