Phreatophyte influence on reductive dechlorination in a shallow aquifer contaminated with trichloroethene (TCE)

Lee, R. W.; Jones, Sonya A.; Kuniansky, Eve L.; Harvey, G.; Lollar, Barbara Sherwood; Slater, G. F.

doi:10.1080/15226510009359032

Cited by 12 publications

(6 citation statements)

References 7 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Previous investigations have shown that the rhizosphere of tree TX7 contains a mature anaerobic microbial population capable of dechlorinating TCE (Godsey et al 2003) and that reductive dechlorination of TCE to cDCE is taking place in the ground water near the tree (Lee et al 2000). The data suggest that large amounts of cDCE relative to TCE in some tree cores at this site reflect subsurface dechlorination of TCE.…”

Section: Carswell Golf Coursementioning

confidence: 57%

“…Consistent with this, the cDCE/TCE ratios in cores from trees TX4 and TX6 growing north of Farmer's Branch where the shallow ground water was ~1 m deep were higher than in all other trees except the previously mentioned tree TX11. As further support, tree cores from tree TX7 showed higher cDCE than TCE concentrations ( tree TX7 contains a mature anaerobic microbial population capable of dechlorinating TCE (Godsey et al 2003) and that reductive dechlorination of TCE to cDCE is taking place in the ground water near the tree (Lee et al 2000). The data suggest that large amounts of cDCE relative to TCE in some tree cores at this site reflect subsurface dechlorination of TCE.…”

Section: Carswell Golf Coursementioning

confidence: 77%

See 1 more Smart Citation

Ground Water Chlorinated Ethenes in Tree Trunks: Case Studies, Influence of Recharge, and Potential Degradation Mechanism

Vroblesky

Clinton

Vose

et al. 2004

Groundwater Monitoring Rem

View full text Add to dashboard Cite

Trichloroethene (TCE) was detected in cores of trees growing above TCE‐contaminated ground at three sites: the Carswell Golf Course in Texas, Air Force Plant PJKS in Colorado, and Naval Weapons Station Charleston in South Carolina. This was true even when the depth to water was 7.9 m or when the contaminated aquifer was confined beneath ∼3 m of clay. Additional ground water contaminants detected in the tree cores were cis–1,2‐dichloroethene at two sites and tetrachloroethene at one site. Thus, tree coring can be a rapid and effective means of locating shallow subsurface chlorinated ethenes and possibly identifying zones of active TCE dechlorination. Tree cores collected over time were useful in identifying the onset of ground water contamination. Several factors affecting chlorinated ethene concentrations in tree cores were identified in this investigation. The factors include ground water chlorinated ethene concentrations and depth to ground water contamination. In addition, differing TCE concentrations around the trunk of some trees appear to be related to the roots deriving water from differing areas. Opportunistic uptake of infiltrating rainfall can dilute prerain TCE concentrations in the trunk. TCE concentrations in core headspace may differ among some tree species. In some trees, infestation of bacteria in decaying heartwood may provide a TCE dechlorination mechanism within the trunk.

show abstract

Section: Carswell Golf Coursementioning

confidence: 57%

Section: Carswell Golf Coursementioning

confidence: 77%

Ground Water Chlorinated Ethenes in Tree Trunks: Case Studies, Influence of Recharge, and Potential Degradation Mechanism

Vroblesky

Clinton

Vose

et al. 2004

Groundwater Monitoring Rem

View full text Add to dashboard Cite

show abstract

“…Anderson and Walton (1995) and Lee et al (2000) documented methanogenic redox conditions in the root zone of trees growing in TCE-contaminated field sites. At the Carswell field site, cis-DCE, VC, and higher concentrations of dissolved organic carbon were detected in the root zone of the cottonwood and willow trees Lee et al, 2000). The presence of trans-DCE in our hydroponic greenhouse test suggests abiotic reduction, although it is not clear if the transformation of the parent compounds occurred in the hydroponic solution or at the root membranes.…”

Section: Discussionmentioning

confidence: 96%

Sequestration, Phytoreduction, and Phytooxidation of Halogenated Organic Chemicals by Aquatic and Terrestrial Plants

Nzengung¹,

Jeffers²

2001

International Journal of Phytoremediation

View full text Add to dashboard Cite

“…Yet, root turnover and root exudation provide microbial populations with simple carbon sources that could deplete soil oxygen when metabolized (Lynch, 1990). Thus, it is unclear if plants commonly used in phytoremediation (e.g., hybrid poplar trees) are net sources or sinks of oxygen in contaminated soil (Lee et al, 2000). Furthermore, plant roots are known to require oxygen (Neuman et al, 1996).…”

Section: Introductionmentioning

confidence: 99%

Stimulation of Hybrid Poplar Growth in Petroleum-Contaminated Soils through Oxygen Addition and Soil Nutrient Amendments

Rentz¹,

Chapman²,

Alvarez³

et al. 2003

International Journal of Phytoremediation

View full text Add to dashboard Cite

Hybrid poplar trees (Populus deltoides x nigra DN34) were grown in a green-house using hydrocarbon-contaminated soil from a phytoremediation demonstration site in Health, Ohio. Two independent experiments investigated the effect of nutrient addition on poplar growth and the importance of oxygen addition to root development and plant growth. Biomass measurements, poplar height, and leaf color were used as indicators of plant health in the selection of a 10/5/5 NPK fertilizer applied at 1121 kg/ha (112 kg-N, 24.4 kg-P, 46.5 kg-K per ha) to enhance hybrid poplar growth at the Health site. Five passive methods of oxygen delivery were examined, including aeration tubes, gravel addition, and an Oxygen Release Compound (ORC). When ORC was placed in coffee filters above hydrocarbon-contaminated soil, a statistically significant increase of 145% was observed in poplar biomass growth, relative to unamended controls. The ORC in filters also stimulated significant increases in root density. A 15.2-cm interval of soil directly below ORC addition exhibited an increase from 2.6 +/- 1.0 mg/cm3 to 4.8 +/- 1.0 mg/cm3, showing stimulation of root growth in hydrocarbon-stained soil. The positive response of hybrid poplars to oxygen amendments suggests that overcoming oxygen limitation to plants should be considered in phytoremediation projects when soil contamination exerts a high biochemical oxygen demand, such as in former refinery sites.

show abstract

Phreatophyte influence on reductive dechlorination in a shallow aquifer contaminated with trichloroethene (TCE)

Cited by 12 publications

References 7 publications

Ground Water Chlorinated Ethenes in Tree Trunks: Case Studies, Influence of Recharge, and Potential Degradation Mechanism

Ground Water Chlorinated Ethenes in Tree Trunks: Case Studies, Influence of Recharge, and Potential Degradation Mechanism

Sequestration, Phytoreduction, and Phytooxidation of Halogenated Organic Chemicals by Aquatic and Terrestrial Plants

Stimulation of Hybrid Poplar Growth in Petroleum-Contaminated Soils through Oxygen Addition and Soil Nutrient Amendments

Contact Info

Product

Resources

About