Natural Biodegradation of Vinyl Chloride and cis-Dichloroethene in Aerobic and Suboxic Conditions

Chlorinated ethene (CE) groundwater contamination is commonly treated through anaerobic biodegradation (i.e., reductive dechlorination) either as part of an engineered system or through natural attenuation. Aerobic biodegradation has also been recognized as a potentially significant pathway for the...

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Bibliographic Details
Published in:Environmental science and pollution research international 2022-08, Vol.29 (37), p.56154-56167
Main Authors: Richards, Patrick M., Ewald, Jessica M., Zhao, Weilun, Rectanus, Heather, Fan, Dimin, Durant, Neal, Pound, Michael, Mattes, Timothy E.
Format: Article
Language:English
Subjects:
Aerobic biodegradation
Aerobic conditions
Anaerobic biodegradation
Anaerobic conditions
Anaerobic treatment
Aquatic Pollution
Atmospheric Protection/Air Quality Control/Air Pollution
Attenuation
Bacteria
Bacteria - metabolism
Biodegradation
Biodegradation, Environmental
Contaminants
Contamination
Dechlorination
Dissolved oxygen
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Health
Environmental science
Ethene
Ethylene
Groundwater
Groundwater - microbiology
Groundwater pollution
Groundwater treatment
Isotopes
Ketones
Microcosms
Natural attenuation
Oxygen - metabolism
Research Article
RNA, Ribosomal, 16S - genetics
rRNA 16S
Shorelines
Vinyl chloride
Vinyl Chloride - metabolism
Waste Water Technology
Water Management
Water Pollutants, Chemical - metabolism
Water Pollution Control
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Summary:Chlorinated ethene (CE) groundwater contamination is commonly treated through anaerobic biodegradation (i.e., reductive dechlorination) either as part of an engineered system or through natural attenuation. Aerobic biodegradation has also been recognized as a potentially significant pathway for the removal of the lower CEs cis -1,2-dichloroethene (cDCE) and vinyl chloride (VC). However, the role of aerobic biodegradation under low oxygen conditions typical of contaminated groundwater is unclear. Bacteria capable of aerobic VC biodegradation appear to be common in the environment, while aerobic biodegradation of cDCE is less common and little is known regarding the organisms responsible. In this study, we investigate the role of aerobic cDCE and VC biodegradation in a mixed contaminant plume (including CEs, BTEX, and ketones) at Naval Air Station North Island, Installation Restoration Site 9. Sediment and groundwater collected from the plume source area, mid-plume, and shoreline were used to prepare microcosms under fully aerobic (8 mg/L dissolved oxygen (DO)) and suboxic (
ISSN:0944-1344
1614-7499
DOI:10.1007/s11356-022-19755-1