Files and links (1)
Accepted (AM)Open Access (License Unspecified), Open
Journal article
Evaluation of a laboratory-scale bioreactive in situ sediment cap for the treatment of organic contaminants
Water research (Oxford), v 45(17), pp 5365-5374
01 Nov 2011
PMID: 21872291
Abstract
The development of bioreactive sediment caps, in which microorganisms capable of contaminant transformation are placed within an in situ cap, provides a potential remedial design that can sustainably treat sediment and groundwater contaminants. The goal of this study was to evaluate the ability and limitations of a mixed, anaerobic dechlorinating consortium to treat chlorinated ethenes within a sand-based cap. Results of batch experiments demonstrate that a tetrachloroethene (PCE)-to-ethene mixed consortium was able to completely dechlorinate dissolved-phase PCE to ethene when supplied only with sediment porewater obtained from a sediment column. To simulate a bioreactive cap, laboratory-scale sand columns inoculated with the mixed culture were placed in series with an upflow sediment column and directly supplied sediment effluent and dissolved-phase chlorinated ethenes. The mixed consortium was not able to sustain dechlorination activity at a retention time of 0.5 days without delivery of amendments to the sediment effluent, evidenced by the loss of cis-1,2-dichloroethene (cis-DCE) dechlorination to vinyl chloride. When soluble electron donor was supplied to the sediment effluent, complete dechlorination of cis-DCE to ethene was observed at retention times of 0.5 days, suggesting that sediment effluent lacked sufficient electron donor to maintain active dechlorination within the sediment cap. Introduction of elevated contaminant concentrations also limited biotransformation performance of the dechlorinating consortium within the cap. These findings indicate that in situ bioreactive capping can be a feasible remedial approach, provided that residence times are adequate and that appropriate levels of electron donor and contaminant exist within the cap. (C) 2011 Elsevier Ltd. All rights reserved.
Metrics
Details
- Title
- Evaluation of a laboratory-scale bioreactive in situ sediment cap for the treatment of organic contaminants
- Creators
- David W. Himmelheber - Georgia Institute of TechnologyKurt D. Pennell - Tufts UniversityJoseph B. Hughes - Georgia Institute of Technology
- Publication Details
- Water research (Oxford), v 45(17), pp 5365-5374
- Publisher
- Elsevier
- Number of pages
- 10
- Grant note
- National Institute of Environmental Health Sciences; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Environmental Health Sciences (NIEHS) Hazardous Substance Research Center-South and Southwest R01ES016154 / NATIONAL INSTITUTE OF ENVIRONMENTAL HEALTH SCIENCES; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Environmental Health Sciences (NIEHS) Georgia Institute of Technology
- Resource Type
- Journal article
- Language
- English
- Academic Unit
- Civil, Architectural, and Environmental Engineering
- Web of Science ID
- WOS:000295894600002
- Scopus ID
- 2-s2.0-80053130266
- Other Identifier
- 991021931901804721
InCites Highlights
Data related to this publication, from InCites Benchmarking & Analytics tool:
- Collaboration types
- Domestic collaboration
- Web of Science research areas
- Engineering, Environmental
- Environmental Sciences
- Water Resources