Quantification of NA processes for the CAH-contamination in Karlsruhe-Ost/Killisfeld with the help of a groundwater model

Schäfer, Wolfgang; Wickert, Frank; Tiehm, Andreas

doi:10.1007/s00767-007-0021-1

Cited by 4 publications

(2 citation statements)

References 17 publications

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“…Mineral medium was used as described previously. , The groundwater was taken from a chloroethene contaminated site in Karlsruhe–Killisfeld . Side reactions were also studied in groundwater from Frankenthal and Lahr.…”

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Sequential Reductive and Oxidative Biodegradation of Chloroethenes Stimulated in a Coupled Bioelectro-Process

Lohner¹,

Becker

Mangold

et al. 2011

Environ. Sci. Technol.

106

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This article for the first time demonstrates successful application of electrochemical processes to stimulate sequential reductive/oxidative microbial degradation of perchloroethene (PCE) in mineral medium and in contaminated groundwater. In a flow-through column system, hydrogen generation at the cathode supported reductive dechlorination of PCE to cis-dichloroethene (cDCE), vinyl chloride (VC), and ethene (ETH). Electrolytically generated oxygen at the anode allowed subsequent oxidative degradation of the lower chlorinated metabolites. Aerobic cometabolic degradation of cDCE proved to be the bottleneck for complete metabolite elimination. Total removal of chloroethenes was demonstrated for a PCE load of approximately 1.5 μmol/d. In mineral medium, long-term operation with stainless steel electrodes was demonstrated for more than 300 days. In contaminated groundwater, corrosion of the stainless steel anode occurred, whereas DSA (dimensionally stable anodes) proved to be stable. Precipitation of calcareous deposits was observed at the cathode, resulting in a higher voltage demand and reduced dechlorination activity. With DSA and groundwater from a contaminated site, complete degradation of chloroethenes in groundwater was obtained for two months thus demonstrating the feasibility of the sequential bioelectro-approach for field application.

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Section: Methodsmentioning

confidence: 99%

“…22,24 The groundwater was taken from a chloroethene contaminated site in KarlsruheÀKillisfeld. 25 Side reactions were also studied in groundwater from Frankenthal and Lahr. For comparison purposes, the most important mineral medium and groundwater parameters are summarized in Table 1.…”

Section: ' Materials and Methodsmentioning

confidence: 99%