Kinetic modeling and toxicity assessment of Diethyl Phthalate treated by H2O2/UV-C process

Tugba Olmez-Hanci; Barkin Dalmaz; Idil Arslan-Alaton; Işik Kabdaşli; Olcay Tünay

doi:10.1080/01919512.2010.493395

Kinetic modeling and toxicity assessment of Diethyl Phthalate treated by H₂O₂/UV-C process

Tugba Olmez-Hanci, Barkin Dalmaz, Idil Arslan-Alaton, Işik Kabdaşli, Olcay Tünay

Department of Environmental Engineering

Istanbul Technical University

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

In the present study, the treatability of aqueous DEP solution employing H₂O₂/UV-C oxidation and the changes in acute and/or chronic toxicity of untreated and H₂O₂/UV-C treated DEP solutions was investigated. For DEP removal and its ultimate oxidation (mineralization), an optimum initial H₂O₂ concentration of 40 mM was required. The HO^. bimolecular reaction rate constant of DEP was found as 2.33 ± 0.27 × 10⁸ M^-1 s^-1. Activated sludge inhibition experiments inferred that H₂O₂/UV-C treated DEP solutions were composed of a mixture of oxidation intermediates which exhibited higher degree of inhibition to heterotrophic biomass with respect to DEP. According to the results obtained in this work, the complete mineralization of DEP by H₂O₂/UV-C process would be a better option.

Original language	English
Pages (from-to)	238-243
Number of pages	6
Journal	Ozone: Science and Engineering
Volume	32
Issue number	4
DOIs	https://doi.org/10.1080/01919512.2010.493395
Publication status	Published - 2010

Funding

On the other hand, DEP has been designated as a hazardous, priority pollutant under the US Clean Water Act and has also been listed as a chemical of major concern by different agencies (US EPA, Canadian EPA, etc.) as well as the EU Commission (USEPA, 1981; Nordic Council of Ministers and Danish National Institute of Occupational Health, 1990). Hence, its complete elimination or at least partial destruction (detoxification) from water and wastewater has become a priority environmental task recently. Different treatment methods have been proposed for EDC removal including adsorption, catalytic oxidation, ozonation and advanced oxidation processes (AOPs) such as power ultrasound, heterogeneous photocatalysis (TiO2/UV-A or visible light irradiation), Fenton, Photo-Fenton and H2O2/UV-C processes (Esplugas et al., 2007; Gultekin and Ince, 2007).

Funders	Funder number
Canadian EPA
Nordic Council of Ministers and Danish National Institute of Occupational Health
US Clean Water Act
US EPA
USEPA
Pennsylvania Department of Environmental Protection
European Commission

Keywords

Activated Sludge Inhibition Test
Advanced Oxidation Processes (AOPs)
Diethyl Phthalate
Endocrine Disrupting Compounds (EDC's)
Kinetic Modeling

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

Access to Document

10.1080/01919512.2010.493395

Cite this

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abstract = "In the present study, the treatability of aqueous DEP solution employing H2O2/UV-C oxidation and the changes in acute and/or chronic toxicity of untreated and H2O2/UV-C treated DEP solutions was investigated. For DEP removal and its ultimate oxidation (mineralization), an optimum initial H2O2 concentration of 40 mM was required. The HO. bimolecular reaction rate constant of DEP was found as 2.33 ± 0.27 × 108 M-1 s-1. Activated sludge inhibition experiments inferred that H2O2/UV-C treated DEP solutions were composed of a mixture of oxidation intermediates which exhibited higher degree of inhibition to heterotrophic biomass with respect to DEP. According to the results obtained in this work, the complete mineralization of DEP by H2O2/UV-C process would be a better option.",

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AU - Arslan-Alaton, Idil

AU - Kabdaşli, Işik

AU - Tünay, Olcay

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