Details zur Publikation

Referenztyp Zeitschriften
DOI / URL Link
Titel (primär) Assessment of hexachlorcyclohexane biodegradation in contaminated soil by compound-specific stable isotope analysis
Autor Qian, Y.; Chen, K.; Liu, Y.; Li, J.;
Journal / Serie Environmental Pollution
Erscheinungsjahr 2019
Department ISOBIO;
Band/Volume 254
Heft Part A
Sprache englisch;
POF III (gesamt) T41;
Keywords Carbon isotope fractionation; Persistent organic pollutants (POPs); Bioremediation of contaminated soil; Biodegradation; Biostimulation
Abstract Compound-specific isotope analysis (CSIA) was firstly applied to explore the biodegradation of hexachlorcyclohexane (HCH) isomers in contaminated soil. Concentrations and compound-specific carbon isotope ratio profiles of HCH in different specific ex-situ pilot-scale contaminated soil mesocosms were determined. The addition of nutrients and Sphingobium spp. significantly enhanced the degradation of HCH in contaminated soils within 90 days. Isomer specific biodegradation of HCHs was observed with α- and γ-HCH being more degradable than β and δ-HCH. Stable carbon isotope fractionation of HCH was observed and the δ13C values shifted from −28.8 ± 0.3‰ to −24.8 ± 0.7‰ upon 87.3% removal, −27.9 ± 0.2‰ to −25.9 ± 0.5‰ upon 72.8% removal, −29.4 ± 0.3‰ to −19.9 ± 0.6‰ upon 95.8% removal, and −27.8 ± 0.5‰ to −23.6 ± 0.7‰ after 96.9% removal for α, β, γ, and δ-HCH, respectively. Furthermore, the enrichment factor ε for α, β, γ, and δ-HCH biodegradation in soil was obtained for the first time as −2.0‰, −1.5‰, −3.2‰, and −1.4‰, which could play a critical role in assessing in situ biodegradation of HCH isomers in field site soil. Results from ex-situ pilot-scale experiments clearly demonstrated that CSIA could be a promising tool to qualitatively and quantitatively evaluate in situ biodegradation of HCH in contaminated field site.
ID 22093
dauerhafte UFZ-Verlinkung https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=22093
Qian, Y., Chen, K., Liu, Y., Li, J. (2019):
Assessment of hexachlorcyclohexane biodegradation in contaminated soil by compound-specific stable isotope analysis
Environ. Pollut. 254 (Part A), art. 113008