Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F15%3A00086548" target="_blank" >RIV/00216224:14310/15:00086548 - isvavai.cz</a>
Result on the web
<a href="http://dx.doi.org/10.1021/es502791f" target="_blank" >http://dx.doi.org/10.1021/es502791f</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1021/es502791f" target="_blank" >10.1021/es502791f</a>
Alternative languages
Result language
angličtina
Original language name
Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation
Original language description
Humic substances (HS) acting as photosensitizers can generate a variety of reactive species, such as OH radicals and excited triplet states ((HS)-H-3*), promoting the degradation of organic compounds. Here, we apply compound-specific stable isotope analysis (CSIA) to characterize photosensitized mechanisms employing fuel oxygenates, such as methyl tert-butyl ether (MTBE) and ethyl tert-butyl ether (ETBE), as probes. In oxygenated aqueous media, Delta (Delta delta H-2/Delta delta C-13) values of 23 +/- 3and 21 +/- 3 for ETBE obtained by photosensitization by Pahokee Peat Humic Acid (PPHA) and Suwannee River Fulvic Acid (SRFA), respectively, were in the range typical for H-abstraction by OH radicals generated by photolysis of H2O2 (Delta = 24 +/- 2). However, (3)HS* may become a predominant reactive species upon the quenching of OH radicals (Delta = 14 +/- 1), and this process can also play a key role in the degradation of ETBE by PPHA photosensitization in deoxygenated media (Delta = 1
Czech name
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Czech description
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Classification
Type
J<sub>x</sub> - Unclassified - Peer-reviewed scientific article (Jimp, Jsc and Jost)
CEP classification
CC - Organic chemistry
OECD FORD branch
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Result continuities
Project
<a href="/en/project/LO1214" target="_blank" >LO1214: Research Centre for Toxic Compounds in the Environment</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace
Others
Publication year
2015
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Environmental Science and Technology
ISSN
0013-936X
e-ISSN
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Volume of the periodical
49
Issue of the periodical within the volume
1
Country of publishing house
US - UNITED STATES
Number of pages
10
Pages from-to
233-242
UT code for WoS article
000347589300026
EID of the result in the Scopus database
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