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Solar Fenton and solar TiO2 catalytic treatment of ofloxacin in secondary treated effluents: evaluation of operational and kinetic parameters.
Water Res. 2010 Oct; 44(18):5450-62.WR

Abstract

Two different technical approaches based on advanced oxidation processes (AOPs), solar Fenton homogeneous photocatalysis (hv/Fe(2+)/H(2)O(2)) and heterogeneous photocatalysis with titanium dioxide (TiO(2)) suspensions were studied for the chemical degradation of the fluoroquinolone ofloxacin in secondary treated effluents. A bench-scale solar simulator in combination with an appropriate photochemical batch reactor was used to evaluate and select the optimal oxidation conditions of ofloxacin spiked in secondary treated domestic effluents. The concentration profile of the examined substrate during degradation was determined by UV/Vis spectrophotometry. Mineralization was monitored by measuring the dissolved organic carbon (DOC). The concentrations of Fe(2+) and H(2)O(2) were the key factors for the solar Fenton process, while the most important parameter of the heterogeneous photocatalysis was proved to be the catalyst loading. Kinetic analyses indicated that the photodegradation of ofloxacin can be described by a pseudo-first-order reaction. The rate constant (k) for the solar Fenton process was determined at different Fe(2+) and H(2)O(2) concentrations whereas the Langmuir-Hinshelwood (LH) kinetic expression was used to assess the kinetics of the heterogeneous photocatalytic process. The conversion of ofloxacin depends on several parameters based on the various experimental conditions, which were investigated. A Daphnia magna bioassay was used to evaluate the potential toxicity of the parent compound and its photo-oxidation by-products in different stages of oxidation. In the present study solar Fenton has been demonstrated to be more effective than the solar TiO(2) process, yielding complete degradation of the examined substrate and DOC reduction of about 50% in 30 min of the photocatalytic treatment.

Authors+Show Affiliations

Department of Civil and Environmental Engineering, University of Cyprus, 75 Kallipoleos St. 1678, Nicosia, Cyprus.No 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

20667580

Citation

Michael, I, et al. "Solar Fenton and Solar TiO2 Catalytic Treatment of Ofloxacin in Secondary Treated Effluents: Evaluation of Operational and Kinetic Parameters." Water Research, vol. 44, no. 18, 2010, pp. 5450-62.
Michael I, Hapeshi E, Michael C, et al. Solar Fenton and solar TiO2 catalytic treatment of ofloxacin in secondary treated effluents: evaluation of operational and kinetic parameters. Water Res. 2010;44(18):5450-62.
Michael, I., Hapeshi, E., Michael, C., & Fatta-Kassinos, D. (2010). Solar Fenton and solar TiO2 catalytic treatment of ofloxacin in secondary treated effluents: evaluation of operational and kinetic parameters. Water Research, 44(18), 5450-62. https://doi.org/10.1016/j.watres.2010.06.053
Michael I, et al. Solar Fenton and Solar TiO2 Catalytic Treatment of Ofloxacin in Secondary Treated Effluents: Evaluation of Operational and Kinetic Parameters. Water Res. 2010;44(18):5450-62. PubMed PMID: 20667580.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Solar Fenton and solar TiO2 catalytic treatment of ofloxacin in secondary treated effluents: evaluation of operational and kinetic parameters. AU - Michael,I, AU - Hapeshi,E, AU - Michael,C, AU - Fatta-Kassinos,D, Y1 - 2010/07/08/ PY - 2010/04/27/received PY - 2010/06/16/revised PY - 2010/06/22/accepted PY - 2010/7/30/entrez PY - 2010/7/30/pubmed PY - 2011/1/21/medline SP - 5450 EP - 62 JF - Water research JO - Water Res. VL - 44 IS - 18 N2 - Two different technical approaches based on advanced oxidation processes (AOPs), solar Fenton homogeneous photocatalysis (hv/Fe(2+)/H(2)O(2)) and heterogeneous photocatalysis with titanium dioxide (TiO(2)) suspensions were studied for the chemical degradation of the fluoroquinolone ofloxacin in secondary treated effluents. A bench-scale solar simulator in combination with an appropriate photochemical batch reactor was used to evaluate and select the optimal oxidation conditions of ofloxacin spiked in secondary treated domestic effluents. The concentration profile of the examined substrate during degradation was determined by UV/Vis spectrophotometry. Mineralization was monitored by measuring the dissolved organic carbon (DOC). The concentrations of Fe(2+) and H(2)O(2) were the key factors for the solar Fenton process, while the most important parameter of the heterogeneous photocatalysis was proved to be the catalyst loading. Kinetic analyses indicated that the photodegradation of ofloxacin can be described by a pseudo-first-order reaction. The rate constant (k) for the solar Fenton process was determined at different Fe(2+) and H(2)O(2) concentrations whereas the Langmuir-Hinshelwood (LH) kinetic expression was used to assess the kinetics of the heterogeneous photocatalytic process. The conversion of ofloxacin depends on several parameters based on the various experimental conditions, which were investigated. A Daphnia magna bioassay was used to evaluate the potential toxicity of the parent compound and its photo-oxidation by-products in different stages of oxidation. In the present study solar Fenton has been demonstrated to be more effective than the solar TiO(2) process, yielding complete degradation of the examined substrate and DOC reduction of about 50% in 30 min of the photocatalytic treatment. SN - 1879-2448 UR - https://www.unboundmedicine.com/medline/citation/20667580/Solar_Fenton_and_solar_TiO2_catalytic_treatment_of_ofloxacin_in_secondary_treated_effluents:_evaluation_of_operational_and_kinetic_parameters_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0043-1354(10)00440-9 DB - PRIME DP - Unbound Medicine ER -