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Radical-induced destruction of diethyl phthalate in aqueous solution: kinetics, spectral properties, and degradation efficiencies studies

Content Provider	Springer Nature Link
Author	Liu, Ning Xu, Gang Wu, Minghong He, Xiangxin Tang, Liang Shi, Wenyan Wang, Liang Shao, Haiyang
Copyright Year	2012
Abstract	In this work, the reactions of $^{∙}$OH, e aq − , and SO 4 ∙− with diethyl phthalate (DEP) were investigated in aqueous solution by pulse radiolysis, and degradation efficiencies of DEP with $^{∙}$OH and e aq − were evaluated in water using steady-state radiolysis as well. The absolute rate constants of $^{∙}$OH, e aq − , and SO 4 ∙− with DEP were determined as 2.3 × 10$^{9}$, 1.0 × 10$^{10}$, and 1.0 × 10$^{8}$ M$^{−1}$ s$^{−1}$, respectively. The degradation efficiencies for the $^{∙}$OH and e aq − reactions were 81 and 33 %, respectively. Transient absorption spectra were observed for the intermediate radicals produced by $^{∙}$OH, e aq − , and SO 4 ∙− reactions. The results suggested that e aq − transferred to the ester group, resulting in the formation of DEP radical anions. In contrast, $^{∙}$OH and SO 4 ∙− added predominantly to the aromatic ring of DEP, forming the corresponding $^{∙}$OH adducts. The fundamental mechanistic parameters and degradation efficiencies derived from these results were significant for evaluations and applications of advanced oxidation processes.
Starting Page	3727
Ending Page	3737
Page Count	11
File Format	PDF
ISSN	09226168
Journal	Research on Chemical Intermediates
Volume Number	39
Issue Number	8
e-ISSN	15685675
Language	English
Publisher	Springer Netherlands
Publisher Date	2012-11-05
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	DEP Transient absorption spectra Absolute rate constant Degradation efficiency Catalysis Physical Chemistry Inorganic Chemistry
Content Type	Text
Resource Type	Article
Subject	Chemistry

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