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Treatment of petroleum refinery sourwater by advanced oxidation processes.
J Hazard Mater. 2006 Sep 01; 137(1):178-84.JH

Abstract

The performance of several oxidation processes to remove organic pollutants from sourwater was investigated. Sourwater is a specific stream of petroleum refineries, which contains slowly biodegradable compounds and toxic substances that impair the industrial biological wastewater treatment system. Preliminary experiments were conducted, using the following processes: H2O2, H2O2/UV, UV, photocatalysis, ozonation, Fenton and photo-Fenton. All processes, except Fenton and photo-Fenton, did not lead to satisfactory results, reducing at most 35% of the sourwater dissolved organic carbon (DOC). Thus, further experiments were performed with these two techniques to evaluate process conditions and organic matter removal kinetics. Batch experiments revealed that the Fenton reaction is very fast and reaches, in a few minutes, an ultimate DOC removal of 13-27%, due to the formation of iron complexes. Radiation for an additional period of 60 min can increase DOC removal up to 87%. Experiments were also conducted in a continuous mode, operating one 0.4L Fenton stirred reactor and one 1.6L photo-Fenton reactor in series. DOC removals above 75% were reached, when the reaction system was operated with hydraulic retention times (HRT) higher than 85 min. An empirical mathematical model was proposed to represent the DOC removal kinetics, allowing predicting process performance quite satisfactorily.

Authors+Show Affiliations

Chemical Engineering Program-COPPE, Federal University of Rio de Janeiro, P.O. Box 68502, CEP 21941-972 Rio de Janeiro, Brazil.No affiliation info availableNo affiliation info availableNo affiliation info available

Pub Type(s)

Journal Article

Language

eng

PubMed ID

16530949

Citation

Coelho, Alessandra, et al. "Treatment of Petroleum Refinery Sourwater By Advanced Oxidation Processes." Journal of Hazardous Materials, vol. 137, no. 1, 2006, pp. 178-84.
Coelho A, Castro AV, Dezotti M, et al. Treatment of petroleum refinery sourwater by advanced oxidation processes. J Hazard Mater. 2006;137(1):178-84.
Coelho, A., Castro, A. V., Dezotti, M., & Sant'Anna, G. L. (2006). Treatment of petroleum refinery sourwater by advanced oxidation processes. Journal of Hazardous Materials, 137(1), 178-84.
Coelho A, et al. Treatment of Petroleum Refinery Sourwater By Advanced Oxidation Processes. J Hazard Mater. 2006 Sep 1;137(1):178-84. PubMed PMID: 16530949.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Treatment of petroleum refinery sourwater by advanced oxidation processes. AU - Coelho,Alessandra, AU - Castro,Antonio V, AU - Dezotti,Márcia, AU - Sant'Anna,G L,Jr Y1 - 2006/03/13/ PY - 2005/12/02/received PY - 2006/01/24/revised PY - 2006/01/25/accepted PY - 2006/3/15/pubmed PY - 2007/1/11/medline PY - 2006/3/15/entrez SP - 178 EP - 84 JF - Journal of hazardous materials JO - J Hazard Mater VL - 137 IS - 1 N2 - The performance of several oxidation processes to remove organic pollutants from sourwater was investigated. Sourwater is a specific stream of petroleum refineries, which contains slowly biodegradable compounds and toxic substances that impair the industrial biological wastewater treatment system. Preliminary experiments were conducted, using the following processes: H2O2, H2O2/UV, UV, photocatalysis, ozonation, Fenton and photo-Fenton. All processes, except Fenton and photo-Fenton, did not lead to satisfactory results, reducing at most 35% of the sourwater dissolved organic carbon (DOC). Thus, further experiments were performed with these two techniques to evaluate process conditions and organic matter removal kinetics. Batch experiments revealed that the Fenton reaction is very fast and reaches, in a few minutes, an ultimate DOC removal of 13-27%, due to the formation of iron complexes. Radiation for an additional period of 60 min can increase DOC removal up to 87%. Experiments were also conducted in a continuous mode, operating one 0.4L Fenton stirred reactor and one 1.6L photo-Fenton reactor in series. DOC removals above 75% were reached, when the reaction system was operated with hydraulic retention times (HRT) higher than 85 min. An empirical mathematical model was proposed to represent the DOC removal kinetics, allowing predicting process performance quite satisfactorily. SN - 0304-3894 UR - https://www.unboundmedicine.com/medline/citation/16530949/Treatment_of_petroleum_refinery_sourwater_by_advanced_oxidation_processes_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0304-3894(06)00078-1 DB - PRIME DP - Unbound Medicine ER -