NDLI: Kinetic studies of the degradation of parabens in aqueous solution by ozone oxidation

Content Provider	Springer Nature Link
Author	Tay, Kheng Soo Rahman, orsaadah Abd. Radzi Bin Abas, Mhd.
Copyright Year	2009
Abstract	Ozone degradation of a mixture containing methylparaben, ethylparaben, propylparaben, butylparaben and benzylparaben was carried out in aqueous solution. The degradation followed the pseudo-first-order kinetic model and occurs with two ozonation stages with the observed rate constants of second stage ozonation, k obs2, being higher than the observed rate constants in first stage, k obs1. The k obs1 of parabens was found to increase exponentially whilst k obs2 was found to maximize at 35°C. Both k obs1 and k obs2 were found to decrease exponentially with respect to the initial concentration of parabens. Both pH and ozone dose showed positive effects on the rate of degradation. It was also observed that an ozone dose of 0.67 g/h resulted in the removal of 99% of parabens in 12 min, and also the removal of 61 and 32% of chemical oxygen demand (COD) and total organic carbon (TOC), respectively, in 3 h of ozonation time for a 500 μM of solution of parabens.
Starting Page	331
Ending Page	337
Page Count	7
File Format	PDF
ISSN	16103653
Journal	Environmental Chemistry Letters
Volume Number	8
Issue Number	4
e-ISSN	16103661
Language	English
Publisher	Springer-Verlag
Publisher Date	2009-07-25
Publisher Place	Berlin, Heidelberg
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Personal care products Kinetics Degradation Ozonation Ozone Geochemistry Analytical Chemistry Pollution Environmental Chemistry Ecotoxicology
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry

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