Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Prediction of the ofrmation of biogenic nonextractable residues during degradation of environmental chemicals from biomass yields
Autor Trapp, S.; Libonati Brock, A.; Nowak, K.; Kästner, M.;
Journal / Serie Environmental Science & Technology
Erscheinungsjahr 2018
Department UBT;
Band/Volume 52
Heft 2
Sprache englisch;
POF III (gesamt) T41;
Supplements https://pubs.acs.org/doi/suppl/10.1021/acs.est.7b04275
UFZ Querschnittsthemen RU3;
Abstract Degradation tests with radio or stable isotope labeled compounds enable the detection of the formation of nonextractable residues (NER). In PBT and vPvB assessment, remobilisable NER are considered as a potential risk while biogenic NER from incorporation of labeled carbon into microbial biomass are treated as degradation products. Relationships between yield, released CO2 (as indicator of microbial activity and mineralization) and microbial growth can be used to estimate the formation of biogenic NER. We provide a new approach for calculation of potential substrate transformation to microbial biomass (theoretical yield) based on Gibbs free energy and microbially available electrons. We compare estimated theoretical yields of biotechnological substrates and of chemicals of environmental concern with experimentally determined yields for validation of the presented approach. A five-compartment dynamic model is applied to simulate experiments of 13C-labeled 2,4-D and ibuprofen turnover. The results show that bioNER increases with time, and that most bioNER originates from microbial proteins. Simulations with precalculated input data demonstrate that precalculation of yields reduces the number of fit parameters considerably, increases confidence in fitted kinetic data, and reduces the uncertainty of the simulation results.
ID 19892
dauerhafte UFZ-Verlinkung http://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19892
Trapp, S., Libonati Brock, A., Nowak, K., Kästner, M. (2018):
Prediction of the ofrmation of biogenic nonextractable residues during degradation of environmental chemicals from biomass yields
Environ. Sci. Technol. 52 (2), 663 - 672