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

Radical-induced destruction of diethyl phthalate in aqueous solution: kinetics, spectral... 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 × 109, 1.0 × 1010, and 1.0 × 108 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. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

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

Loading next page...
 
/lp/springer_journal/radical-induced-destruction-of-diethyl-phthalate-in-aqueous-solution-tSMSr0kx6w
Publisher
Springer Netherlands
Copyright
Copyright © 2012 by Springer Science+Business Media Dordrecht
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-012-0876-3
Publisher site
See Article on Publisher Site

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 × 109, 1.0 × 1010, and 1.0 × 108 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.

Journal

Research on Chemical IntermediatesSpringer Journals

Published: Nov 5, 2012

References

You’re reading a free preview. Subscribe to read the entire article.


DeepDyve is your
personal research library

It’s your single place to instantly
discover and read the research
that matters to you.

Enjoy affordable access to
over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month

Explore the DeepDyve Library

Unlimited reading

Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere.

Stay up to date

Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates.

Organize your research

It’s easy to organize your research with our built-in tools.

Your journals are on DeepDyve

Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more.

All the latest content is available, no embargo periods.

See the journals in your area

DeepDyve Freelancer

DeepDyve Pro

Price
FREE
$49/month

$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations
Read DeepDyve articles
Abstract access only
Unlimited access to over
18 million full-text articles
Print
20 pages/month
PDF Discount
20% off