Evolution of Toxicity and Mineralization during the Treatment of Diethylphthalate in Water by Ozone and Activated Carbon Coupling
Publication: Journal of Environmental Engineering
Volume 139, Issue 5
Abstract
Ozone/activated carbon coupling could be an efficient method to remove micropollutants, such as phthalates, that are refractory to classical treatments. However, this wastewater-treatment process can lead to the formation of oxidation by-products that may be toxic and which also need to be removed. The aim of this work was to study the evolution of the mineralization and the toxicity of the effluent during the treatment process so as to determine the efficiency of this method and the required time of treatment. Analyses [Fourier transformed infrared spectroscopy (FTIR), thermogravimetric analyses, adsorption isotherms] of the adsorbent material were performed to understand the role of activated carbon during the treatment. It is shown that depending on the activated carbon properties and the experimental conditions, a fast and complete removal of diethylphthalate, and total mineralization and detoxification of the treated solution can be obtained. Moreover, it is demonstrated that the activated carbon acts more as a reaction site than as an adsorbent, leading to an in situ renewal of the material during the process.
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Acknowledgments
The authors wish to thank Xavier Bourrain and the Agence de l’Eau Loire Bretagne for their technical and financial support, the Conseil Regional du Centre for its financial support, and PICA for generously supplying AC.
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Information & Authors
Information
Published In
Journal of Environmental Engineering
Volume 139 • Issue 5 • May 2013
Pages: 685 - 691
Copyright
© 2013 American Society of Civil Engineers.
History
Received: Mar 26, 2012
Accepted: Oct 24, 2012
Published online: Oct 26, 2012
Published in print: May 1, 2013
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