Publication Details

Category Text Publication
Reference Category Journals
DOI 10.1021/acs.est.6b05632
Title (Primary) Compound specific and enantioselective stable isotope analysis as tools to monitor transformation of hexachlorocyclohexane (HCH) in a complex aquifer system
Author Liu, Y.; Bashir, S.; Stollberg, R.; Trabitzsch, R.; Weiß, H. ORCID logo ; Paschke, H.; Nijenhuis, I.; Richnow, H.-H.
Source Titel Environmental Science & Technology
Year 2017
Department ISOBIO; ANA; ENVINF
Volume 51
Issue 16
Page From 8909
Page To 8916
Language englisch
Supplements https://pubs.acs.org/doi/suppl/10.1021/acs.est.6b05632
UFZ wide themes RU3;
Abstract Technical hexachlorocyclohexane (HCH) mixtures and Lindane (γ-HCH) have been produced in Bitterfeld-Wolfen, Germany, for about 30 years until 1982. In the vicinity of the former dump sites and production facilities, large plumes of HCHs persist within two aquifer systems. We studied the natural attenuation of HCH in these groundwater systems through a combination of enantiomeric and carbon isotope fractionation to characterize the degradation of α-HCH in the areas downstream of a former disposal and production site in Bitterfeld-Wolfen. The concentration and isotope composition of α-HCH from the Quaternary and Tertiary aquifers were analyzed. The carbon isotope compositions were compared to the source signal of waste deposits for the dumpsite and highly contaminated areas. The average value of δ13C at dumpsite was −29.7 ± 0.3 ‰ and −29.0 ± 0.1 ‰ for (−) and (+)α-HCH, respectively, while those for the β-, γ-, δ-HCH isomers were −29.0 ± 0.3 ‰, −29.5 ± 0.4 ‰, and −28.2 ± 0.2 ‰, respectively. In the plume, the enantiomer fraction shifted up to 0.35, from 0.50 at source area to 0.15 (well T1), and was found accompanied by a carbon isotope enrichment of 5 ‰ and 2.9 ‰ for (−) and (+)α-HCH, respectively. The established model for interpreting isotope and enantiomer fractionation patterns showed potential for analyzing the degradation process at a field site with a complex history with respect to contamination and fluctuating geochemical conditions.
Persistent UFZ Identifier https://www.ufz.de/index.php?en=20939&ufzPublicationIdentifier=19181
Liu, Y., Bashir, S., Stollberg, R., Trabitzsch, R., Weiß, H., Paschke, H., Nijenhuis, I., Richnow, H.-H. (2017):
Compound specific and enantioselective stable isotope analysis as tools to monitor transformation of hexachlorocyclohexane (HCH) in a complex aquifer system
Environ. Sci. Technol. 51 (16), 8909 - 8916 10.1021/acs.est.6b05632