Influence of soil gamma-irradiation and spiking on sorption of p,p'-DDE and soil organic matter chemistry

Investor logo
Investor logo

Warning

This publication doesn't include Faculty of Economics and Administration. It includes Faculty of Science. Official publication website can be found on muni.cz.
Authors

ŠKULCOVÁ Lucia BRANDSTÄTTER-SCHERR Kerstin CHRÁST Lukáš HOFMAN Jakub BIELSKÁ Lucie

Year of publication 2018
Type Article in Periodical
Magazine / Source Ecotoxicology and Environmental Safety
MU Faculty or unit

Faculty of Science

Citation
Web https://www.sciencedirect.com/science/article/pii/S0147651318301532?via%3Dihub
Doi http://dx.doi.org/10.1016/j.ecoenv.2018.02.061
Keywords Sorption; Soil sterilization; gamma-irradiation; Soil spiking; DDE; SFE; XAD; SPME
Description The fate of organic chemicals and their metabolites in soils is often investigated in model matrices having undergone various pre-treatment steps that may qualitatively or quantitatively interfere with the results. Presently, effects associated with soil sterilization by gamma-irradiation and soil spiking using an organic solvent were studied in one freshly spiked soil (sterilization prior to contamination) and its field-contaminated (sterilization after contamination) counterpart for the model organic compound 1,1-Dichloro-2,2-bis(4-chlorophenyl)ethene (p,p'-DDE). Changes in the sorption and potential bioavailability of spiked and native p,p'-DDE were measured by supercritical fluid extraction (SFE), XAD-assisted extraction (XAD), and solid-phase microextraction (SPME) and linked to qualitative changes in soil organic matter (SOM) chemistry measured by diffuse reflectance infrared Fourier-transform (DRIFT) spectroscopy. Reduced sorption of p,p'-DDE detected with XAD and SPME was associated more dearly with spiking than with sterilization, but SFE showed a negligible impact. Spiking resulted in an increase of the DRIFT-derived hydrophobicity index, but irradiation did not. Spectral peak height ratio descriptors indicated increasing hydrophobicity and hydrophilicity in pristine soil following sterilization, and a greater reduction of hydrophobic over hydrophilic groups as a consequence of spiking. In parallel, reduced sorption of p,p'-DDE upon spiking was observed. Based on the present samples, gamma-irradiation appears to alter soil sorptive properties to a lesser extent when compared to common laboratory processes such as spiking with organic solvents.
Related projects:

You are running an old browser version. We recommend updating your browser to its latest version.