Dataset for laboratory treatability experiment with activated carbon and bioamendments to enhance biodegradation of chlorinated ethenes

Abstract

This dataset describes the outcome of a laboratory trichloroethene (TCE) treatability experiment with liquid activated carbon and bioamendments. The treatability experiment included unamended microcosms, bioamended microcosms with a Dehalococcoides containing culture and electron donor, and bioamended microcosms including liquid activated carbon (PlumeStop®). Data were collected frequently over an 85-day experimental period. Data were collected for the following parameters: redox sensitive species, chlorinated ethenes, non-chlorinated end-products, electron donors, compound specific isotopes, specific bacteria and functional genes. The reductive dechlorination of TCE could be described by a carbon isotope enrichment factor (ε C ) of -7.1 ‰. In the amended systems, the degradation rates for the TCE degradation were 0.08–0.13 d −1 and 0.05–0.09 d −1 determined by concentrations and isotope fractionation, respectively. Dechlorination of cis-DCE was limited. This dataset assisted in identifying the impact of different bioamendments and activated carbon on biodegradation of chlorinated ethenes. The dataset is useful in optimising design and setup for future laboratory and field investigations. This study provides novel information on the effect of low dose liquid activated carbon on chlorinated ethenes degradation by applying isotopic and microbial techniques, and by linking the outcome to a field case study. The data presented in this article are related to the research article “Assessment of chlorinated ethenes degradation after field scale injection of activated carbon and bioamendments: Application of isotopic and microbial analyses” (Ottosen et al., 2021).

Assessment of chlorinated ethenes degradation after field scale injection of activated carbon and bioamendments: Application of isotopic and microbial analyses

“…This was supported by low concentrations of VC and by isotope mass balances that were a few ‰ more negative than the equilibrated initial δ 13 C value in each bioaugmented microcosm (data not shown). The carbon isotope fractionation for TCE could also be used to quantify the degradation rates (0.05-0.09 d -1 ), which compared well with concentration based estimations (0.09-0.13 d -1 ) (Ottosen et al, 2021). Hence, the laboratory treatability experiment results demonstrate fractionation caused by TCE degradation.…”

“…The microcosms were monitored for the same parameters as applied in the field, over an 85-day period. See (Ottosen et al, 2021) for a detailed description of the setup and sampling procedure.…”

“…All data from the laboratory treatability experiment is provided in a Data in Brief article (Ottosen et al, 2021). It is a low dose activated carbon experiment, and minor sorption is expected in the PlumeStop and bioaugmented microcosms.…”