Journal of Physical Chemistry A, volume 114, issue 32, pages 8391-8395

Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements

Michelle K. Dail 1
Stephen P. Mezyk 1
1
 
Department of Chemistry and Biochemistry, California State University at Long Beach, 1250 Bellflower Boulevard, Long Beach, California 90840
Publication typeJournal Article
Publication date2010-07-27
Quartile SCImago
Q2
Quartile WOS
Q2
Impact factor2.9
ISSN10895639, 15205215
Physical and Theoretical Chemistry
Abstract
The beta-lactam antibiotics are some of the most prevalent pharmaceutical contaminants currently being detected in aquatic environments. Because the presence of any trace level of antibiotic in water may adversely affect aquatic ecosystems and contribute to the production of antibiotic-resistant bacteria, active removal by additional water treatments, such as using advanced oxidation and reduction processes (AO/RPs), may be required. However, to ensure that any AOP treatment process occurs efficiently and quantitatively, a full understanding of the kinetics and mechanisms of all of the chemical reactions involved under the conditions of use is necessary. In this study, we report on our kinetic measurements for the hydroxyl-radical-induced oxidation of 11 beta-lactam antibiotics obtained using electron pulse radiolysis techniques. For the 5-member ring species, an average reaction rate constant of (7.9 +/- 0.8) x 10(9) M(-1) s(-1) was obtained, slightly faster than for the analogous 6-member ring containing antibiotics, (6.6 +/- 1.2) x 10(9) M(-1) s(-1). The consistency of these rate constants for each group infers a common reaction mechanism, consisting of the partitioning of the hydroxyl radical between addition to peripheral aromatic rings and reaction with the central double-ring core of these antibiotics.

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Dail M. K., Mezyk S. P. Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements // Journal of Physical Chemistry A. 2010. Vol. 114. No. 32. pp. 8391-8395.
GOST all authors (up to 50) Copy
Dail M. K., Mezyk S. P. Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements // Journal of Physical Chemistry A. 2010. Vol. 114. No. 32. pp. 8391-8395.
RIS |
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RIS Copy
TY - JOUR
DO - 10.1021/jp104509t
UR - https://doi.org/10.1021/jp104509t
TI - Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements
T2 - Journal of Physical Chemistry A
AU - Dail, Michelle K.
AU - Mezyk, Stephen P.
PY - 2010
DA - 2010/07/27 00:00:00
PB - American Chemical Society (ACS)
SP - 8391-8395
IS - 32
VL - 114
SN - 1089-5639
SN - 1520-5215
ER -
BibTex |
Cite this
BibTex Copy
@article{2010_Dail,
author = {Michelle K. Dail and Stephen P. Mezyk},
title = {Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements},
journal = {Journal of Physical Chemistry A},
year = {2010},
volume = {114},
publisher = {American Chemical Society (ACS)},
month = {jul},
url = {https://doi.org/10.1021/jp104509t},
number = {32},
pages = {8391--8395},
doi = {10.1021/jp104509t}
}
MLA
Cite this
MLA Copy
Dail, Michelle K., and Stephen P. Mezyk. “Hydroxyl-Radical-Induced Degradative Oxidation of β-Lactam Antibiotics in Water: Absolute Rate Constant Measurements.” Journal of Physical Chemistry A, vol. 114, no. 32, Jul. 2010, pp. 8391-8395. https://doi.org/10.1021/jp104509t.
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