Many chemical compounds found in health and personal care products and household items are known to affect the regular function of endocrine system in human and animals. Their increasing occurrence in natural water is a growing concern as traditional treatment technologies in current wastewater and water treatment plants are shown to be ineffective against these pollutants [1]. Chronic exposure to endocrine disrupting compounds (EDCs) in human has not been adequately studied, but their effects on normal hormonal processes are well documented and there is strong evidence of their adverse effects in wildlife [2]. This work investigates the removal and treatment a pharmaceutical EDC, diclofenac, a non-steroidal anti-inframmatory drug that is appearing in increasing frequency in natural water [3]. An advanced ozone membrane reactor that synergistically combines ozone oxidation, adsorption and membrane separation was used to treat the recalcitrant EDC pollutants in water. The compact treatment unit uses membranes as ozone distributor, reaction contactor and water separator. Minute ozone gas bubbles generated by the membrane distributor enhance the mass transfer rate and result in rapid oxidation of organic compounds. The contactor serves the purpose of increasing the interfacial contact area between the gas phase ozone and dissolved organics, and using adsorbent material, the contactor will also adsorb and trap the organics within the reaction zone allowing for more complete remediation. The membrane separator produces clean water and concentrates the organics within the reaction zone resulting in better reaction kinetics [4].References:[1] M.J. Benotti, R.A. Trenholm, B.J. Vanderford, J.C. Holady, B.D. Stanford, S.A. Snyder, Environmental & Science Technology, 43 (2009) 597-603.[2] World Health Organization, Global assessment of the state-of-the-science of endocrine disruptors, WHO/PCS/EDC/03/3, (2002).[3] E. Vulliet, C. Cren-Oliv�, M-F. Grenier-Loustalot., Environmantal Chemistry Letters, 9 (2009) 110-114.[4] S. Heng, K.L. Yeung, M. Djafer, J.C. Schrotter, Journal of Membrane Science, 289 (2007) 67-75.

Treatment of NSAID compound in water by advanced ozone membrane reactor

246th National Meeting (2013)

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