Phytoremediation of BTEX hydrocarbons: potential impacts of diurnal groundwater fluctuation on microbial degradation.
Identifieur interne : 003434 ( Main/Curation ); précédent : 003433; suivant : 003435Phytoremediation of BTEX hydrocarbons: potential impacts of diurnal groundwater fluctuation on microbial degradation.
Auteurs : Jeff A. Weishaar [États-Unis] ; David Tsao ; Joel G. BurkenSource :
- International journal of phytoremediation [ 1522-6514 ] ; 2009.
Descripteurs français
- KwdFr :
- Bactéries (métabolisme), Déchets industriels (MeSH), Dépollution biologique de l'environnement (MeSH), Dérivés du benzène (composition chimique), Dérivés du benzène (métabolisme), Microbiologie du sol (MeSH), Polluants chimiques de l'eau (composition chimique), Polluants chimiques de l'eau (métabolisme), Pétrole (MeSH), Rythme circadien (MeSH).
- MESH :
- composition chimique : Dérivés du benzène, Polluants chimiques de l'eau.
- métabolisme : Bactéries, Dérivés du benzène, Polluants chimiques de l'eau.
- Déchets industriels, Dépollution biologique de l'environnement, Microbiologie du sol, Pétrole, Rythme circadien.
English descriptors
- KwdEn :
- Bacteria (metabolism), Benzene Derivatives (chemistry), Benzene Derivatives (metabolism), Biodegradation, Environmental (MeSH), Circadian Rhythm (MeSH), Industrial Waste (MeSH), Petroleum (MeSH), Soil Microbiology (MeSH), Water Pollutants, Chemical (chemistry), Water Pollutants, Chemical (metabolism).
- MESH :
- chemical , chemistry : Benzene Derivatives, Water Pollutants, Chemical.
- metabolism : Bacteria, Benzene Derivatives, Water Pollutants, Chemical.
- Biodegradation, Environmental, Circadian Rhythm, Industrial Waste, Petroleum, Soil Microbiology.
Abstract
Volatile hydrocarbons have multiple potential fates in phytoremediation. This research investigated the relationship between biodegradation and plant uptake of BTEX compounds in laboratory and field settings. At a phytoremediation site, preliminary studies revealed minimal uptake into trees and enhanced degradation potential in the rhizosphere and in the bulk soiL Increased oxygen transport to the vadose zone caused by diurnal rise and fall of the water table was hypothesized to enhance degradation in the bulk soil. A detailed greenhouse study was then conducted to investigate potential bioremediation impacts using field-site soil and DN34 hybrid poplar trees. In rhizosphere soils, the contaminated-planted reactor had significantly higher BTEX degrader populations versus the uncontaminated-planted reactor, as was anticipated. The bulk soil in the planted-contaminated reactor had increased degrader populations than the unplanted-contaminated soil or planted-uncontaminated soil, and planting increased degradation throughout the soil profile, not just in the limited volume of rhizosphere soils. Oxygen diffusive and advective transport into reactors was modeled and calculated. Oxygen input in planted reactors was at least 3 to 5 times higher than in unplanted reactors, and increasing oxygen input lead to increased degrader populations in a linear manner. These results combined with the knowledge that high-transpiration trees draw the contaminated groundwater to the capillary fringe and the rhizosphere indicate that phytoremediation can aid microbial degradation via multiple mechanisms: increasing degrader populations, increasing oxygen input via groundwater diurnal fluctuations, and transporting contaminants to the biologically-enriched soil profile.
DOI: 10.1080/15226510802656326
PubMed: 19810352
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pubmed:19810352Le document en format XML
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<author><name sortKey="Tsao, David" sort="Tsao, David" uniqKey="Tsao D" first="David" last="Tsao">David Tsao</name>
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<term>Benzene Derivatives (metabolism)</term>
<term>Biodegradation, Environmental (MeSH)</term>
<term>Circadian Rhythm (MeSH)</term>
<term>Industrial Waste (MeSH)</term>
<term>Petroleum (MeSH)</term>
<term>Soil Microbiology (MeSH)</term>
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<term>Water Pollutants, Chemical (metabolism)</term>
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<keywords scheme="KwdFr" xml:lang="fr"><term>Bactéries (métabolisme)</term>
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<term>Dérivés du benzène (composition chimique)</term>
<term>Dérivés du benzène (métabolisme)</term>
<term>Microbiologie du sol (MeSH)</term>
<term>Polluants chimiques de l'eau (composition chimique)</term>
<term>Polluants chimiques de l'eau (métabolisme)</term>
<term>Pétrole (MeSH)</term>
<term>Rythme circadien (MeSH)</term>
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<keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Benzene Derivatives</term>
<term>Water Pollutants, Chemical</term>
</keywords>
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<term>Polluants chimiques de l'eau</term>
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<term>Benzene Derivatives</term>
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<term>Dérivés du benzène</term>
<term>Polluants chimiques de l'eau</term>
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<keywords scheme="MESH" xml:lang="en"><term>Biodegradation, Environmental</term>
<term>Circadian Rhythm</term>
<term>Industrial Waste</term>
<term>Petroleum</term>
<term>Soil Microbiology</term>
</keywords>
<keywords scheme="MESH" xml:lang="fr"><term>Déchets industriels</term>
<term>Dépollution biologique de l'environnement</term>
<term>Microbiologie du sol</term>
<term>Pétrole</term>
<term>Rythme circadien</term>
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<front><div type="abstract" xml:lang="en">Volatile hydrocarbons have multiple potential fates in phytoremediation. This research investigated the relationship between biodegradation and plant uptake of BTEX compounds in laboratory and field settings. At a phytoremediation site, preliminary studies revealed minimal uptake into trees and enhanced degradation potential in the rhizosphere and in the bulk soiL Increased oxygen transport to the vadose zone caused by diurnal rise and fall of the water table was hypothesized to enhance degradation in the bulk soil. A detailed greenhouse study was then conducted to investigate potential bioremediation impacts using field-site soil and DN34 hybrid poplar trees. In rhizosphere soils, the contaminated-planted reactor had significantly higher BTEX degrader populations versus the uncontaminated-planted reactor, as was anticipated. The bulk soil in the planted-contaminated reactor had increased degrader populations than the unplanted-contaminated soil or planted-uncontaminated soil, and planting increased degradation throughout the soil profile, not just in the limited volume of rhizosphere soils. Oxygen diffusive and advective transport into reactors was modeled and calculated. Oxygen input in planted reactors was at least 3 to 5 times higher than in unplanted reactors, and increasing oxygen input lead to increased degrader populations in a linear manner. These results combined with the knowledge that high-transpiration trees draw the contaminated groundwater to the capillary fringe and the rhizosphere indicate that phytoremediation can aid microbial degradation via multiple mechanisms: increasing degrader populations, increasing oxygen input via groundwater diurnal fluctuations, and transporting contaminants to the biologically-enriched soil profile.</div>
</front>
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<Title>International journal of phytoremediation</Title>
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<Abstract><AbstractText>Volatile hydrocarbons have multiple potential fates in phytoremediation. This research investigated the relationship between biodegradation and plant uptake of BTEX compounds in laboratory and field settings. At a phytoremediation site, preliminary studies revealed minimal uptake into trees and enhanced degradation potential in the rhizosphere and in the bulk soiL Increased oxygen transport to the vadose zone caused by diurnal rise and fall of the water table was hypothesized to enhance degradation in the bulk soil. A detailed greenhouse study was then conducted to investigate potential bioremediation impacts using field-site soil and DN34 hybrid poplar trees. In rhizosphere soils, the contaminated-planted reactor had significantly higher BTEX degrader populations versus the uncontaminated-planted reactor, as was anticipated. The bulk soil in the planted-contaminated reactor had increased degrader populations than the unplanted-contaminated soil or planted-uncontaminated soil, and planting increased degradation throughout the soil profile, not just in the limited volume of rhizosphere soils. Oxygen diffusive and advective transport into reactors was modeled and calculated. Oxygen input in planted reactors was at least 3 to 5 times higher than in unplanted reactors, and increasing oxygen input lead to increased degrader populations in a linear manner. These results combined with the knowledge that high-transpiration trees draw the contaminated groundwater to the capillary fringe and the rhizosphere indicate that phytoremediation can aid microbial degradation via multiple mechanisms: increasing degrader populations, increasing oxygen input via groundwater diurnal fluctuations, and transporting contaminants to the biologically-enriched soil profile.</AbstractText>
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