Publication Details |
Reference Category | Journals |
DOI / URL | link |
Document | author version |
Title (Primary) | Characterizing chemical transformation of organophosphorus compounds by 13C and 2H stable isotope analysis |
Author | Wu, L.; Chládková, B.; Lechtenfeld, O.J.; Lian, S.; Schindelka, J.; Herrmann, H.; Richnow, H.H. |
Journal | Science of the Total Environment |
Year | 2018 |
Department | ISOBIO; ANA |
Volume | 615 |
Page From | 20 |
Page To | 28 |
Language | englisch |
Supplements | https://ars.els-cdn.com/content/image/1-s2.0-S0048969717325846-mmc1.docx |
Keywords | Compound specific isotope analysis; Parathion; TCEP; Hydrolysis; Photolysis; Transformation products |
UFZ wide themes | RU3; ProVIS; |
Abstract |
Continuous and excessive use of organophosphorus compounds (OPs) has led
to environmental contaminations which raise public concerns. This study
investigates the isotope fractionation patterns of OPs in the aquatic
environment dependence upon hydrolysis, photolysis and radical oxidation
processes. The hydrolysis of parathion (EP) and methyl parathion (MP) resulted
in significant carbon fractionation at lower pH (pH 2–7, εC = − 6.9 ~ − 6.0‰
for EP, − 10.5 ~ − 9.9‰ for MP) but no detectable carbon
fractionation at higher pH (pH 12). Hydrogen fractionation was not
observed during any of the hydrolysis experiments. These results indicate that
compound specific isotope analysis (CSIA) allows distinction of two different
pH-dependent pathways of hydrolysis. Carbon and hydrogen isotope fractionation
were determined during UV/H2O2 photolysis of EP and tris(2-chloroethyl) phosphate (TCEP). The constant
δ2H values determined
during the OH radical reaction of EP suggested that the rate-limiting step
proceeded through oxidative attack by OH radical on the P |
Persistent UFZ Identifier | https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19374 |
Wu, L., Chládková, B., Lechtenfeld, O.J., Lian, S., Schindelka, J., Herrmann, H., Richnow, H.H. (2018): Characterizing chemical transformation of organophosphorus compounds by 13C and 2H stable isotope analysis Sci. Total Environ. 615 , 20 - 28 |