Investigation of Humic Substance Photosensitized Reactions via
Carbon and Hydrogen Isotope Fractionation

J 2015

Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation

ZHANG, Ning, Janine SCHINDELKA, Hartmut HERRMANN, Christian GEORGE, Monica ROSELL et. al.

Základní údaje

Originální název

Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation

Autoři

ZHANG, Ning (156 Čína), Janine SCHINDELKA (276 Německo), Hartmut HERRMANN (276 Německo), Christian GEORGE (250 Francie), Monica ROSELL (724 Španělsko), Sara HERRERO-MARTIN (276 Německo), Petr KLÁN (203 Česká republika, garant, domácí) a Hans-Hermann RICHNOW (276 Německo)

Vydání

Environmental Science and Technology, 2015, 0013-936X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10401 Organic chemistry

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.393

Kód RIV

RIV/00216224:14310/15:00086548

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.1021/es502791f

UT WoS

000347589300026

Klíčová slova anglicky

photochemistry; isotopes; photosensitization; humic substrances

Štítky

AKR, rivok

Změněno: 11. 2. 2016 14:43, prof. RNDr. Petr Klán, Ph.D.

Anotace

V originále

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 +/- 3 and 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 = 11 +/- 1). This is in agreement with a model photosensitization by rose bengal (RB2-) in deoxygenated aqueous solutions resulting in one-electron oxidation of ETBE (Delta = 14 +/- 1). Our results demonstrate that the use of CSIA could open new avenues for the assessment of photosensitization pathways.

Návaznosti

LO1214, projekt VaV

Název: Centrum pro výzkum toxických látek v prostředí (Akronym: RECETOX)

Investor: Ministerstvo školství, mládeže a tělovýchovy ČR, Centrum pro výzkum toxických látek v prostředí

Citovat

ZHANG, Ning, Janine SCHINDELKA, Hartmut HERRMANN, Christian GEORGE, Monica ROSELL, Sara HERRERO-MARTIN, Petr KLÁN a Hans-Hermann RICHNOW. Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation. Environmental Science and Technology. 2015, roč. 49, č. 1, s. 233-242. ISSN 0013-936X. Dostupné z: https://dx.doi.org/10.1021/es502791f.

@article{1335111,
   author = {Zhang, Ning and Schindelka, Janine and Herrmann, Hartmut and George, Christian and Rosell, Monica and HerreroandMartin, Sara and Klán, Petr and Richnow, HansandHermann},
   article_number = {1},
   doi = {http://dx.doi.org/10.1021/es502791f},
   keywords = {photochemistry; isotopes; photosensitization; humic substrances},
   language = {eng},
   issn = {0013-936X},
   journal = {Environmental Science and Technology},
   title = {Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation},
   url = {http://pubs.acs.org/doi/abs/10.1021/es502791f},
   volume = {49},
   year = {2015}
}

TY  - JOUR
ID  - 1335111
AU  - Zhang, Ning - Schindelka, Janine - Herrmann, Hartmut - George, Christian - Rosell, Monica - Herrero-Martin, Sara - Klán, Petr - Richnow, Hans-Hermann
PY  - 2015
TI  - Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation
JF  - Environmental Science and Technology
VL  - 49
IS  - 1
SP  - 233-242
EP  - 233-242
SN  - 0013936X
KW  - photochemistry
KW  - isotopes
KW  - photosensitization
KW  - humic substrances
UR  - http://pubs.acs.org/doi/abs/10.1021/es502791f
N2  - 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 +/- 3 and 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 = 11 +/- 1). This is in agreement with a model photosensitization by rose bengal (RB2-) in deoxygenated aqueous solutions resulting in one-electron oxidation of ETBE (Delta = 14 +/- 1). Our results demonstrate that the use of CSIA could open new avenues for the assessment of photosensitization pathways.
ER  -

ZHANG, Ning, Janine SCHINDELKA, Hartmut HERRMANN, Christian GEORGE, Monica ROSELL, Sara HERRERO-MARTIN, Petr KLÁN a Hans-Hermann RICHNOW. Investigation of Humic Substance Photosensitized Reactions via Carbon and Hydrogen Isotope Fractionation. \textit{Environmental Science and Technology}. 2015, roč.~49, č.~1, s.~233-242. ISSN~0013-936X. Dostupné z: https://dx.doi.org/10.1021/es502791f.

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