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Vol. 26 No. 23 (2014)

Copyright (c) 2014 Xuewei Peng

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Stable Carbon Isotope Fractionation of Diethyl Phthalate During Oxic and Anoxic Degradation in Estuarine Sediment

https://doi.org/10.14233/ajchem.2014.17500
Xuewei Peng
College of Chemistry, Chemical and Environmental Engineering, Weifang University, Weifang, P.R. China Corresponding author: Tel/Fax: +86 536 8785283; E-mail: pengxw@wfu.edu.cn

Corresponding Author(s) : Xuewei Peng

Asian Journal of Chemistry, Vol. 26 No. 23 (2014)

Abstract

Diethyl phthalate was degraded by mixed microbial in estuarine sediment under oxic and anoxic conditions in a laboratory-microcosm. The respective degradation rate constants of diethyl phthalate under both conditions were 0.103 and 0.069 day-1, with respective half-lives of 6.7 and 10 days. Stable carbon isotopic fractionation produced by biodegradation of diethyl phthalate was evaluated with compound-specific isotope analysis under both conditions. A small 13C-enrichment in residual diethyl phthalate at advanced stages of biodegradation under both conditions was observed, which was 1.8 and 0.7 %, respectively. The isotopic enrichment observed in the residue provided the direct evidence of diethyl phthalate biodegradation in estuarine sediment.

Keywords

Diethyl phthalate Compound-specific isotope analysis Degradation.
Peng, X. (2014). Stable Carbon Isotope Fractionation of Diethyl Phthalate During Oxic and Anoxic Degradation in Estuarine Sediment. Asian Journal of Chemistry, 26(23), 8104–8106. https://doi.org/10.14233/ajchem.2014.17500
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