Anaerobic ethylene glycol degradation by microorganisms in poplar and willow rhizospheres.
Identifieur interne : 003707 ( Main/Exploration ); précédent : 003706; suivant : 003708Anaerobic ethylene glycol degradation by microorganisms in poplar and willow rhizospheres.
Auteurs : D. Carnegie [Canada] ; J A RamsaySource :
- Biodegradation [ 1572-9729 ] ; 2009.
Descripteurs français
- KwdFr :
- MESH :
- microbiologie : Populus, Salix.
- métabolisme : Populus, Salix, Éthylène glycol.
- Anaérobiose, Chromatographie en phase gazeuse, Engrais.
English descriptors
- KwdEn :
- MESH :
- chemical , metabolism : Ethylene Glycol.
- metabolism : Populus, Salix.
- microbiology : Populus, Salix.
- Anaerobiosis, Chromatography, Gas, Fertilizers.
Abstract
Although aerobic degradation of ethylene glycol is well documented, only anaerobic biodegradation via methanogenesis or fermentation has been clearly shown. Enhanced ethylene glycol degradation has been demonstrated by microorganisms in the rhizosphere of shallow-rooted plants such as alfalfa and grasses where conditions may be aerobic, but has not been demonstrated in the deeper rhizosphere of poplar or willow trees where conditions are more likely to be anaerobic. This study evaluated ethylene glycol degradation under nitrate-, and sulphate-reducing conditions by microorganisms from the rhizosphere of poplar and willow trees planted in the path of a groundwater plume containing up to 1.9 mol l(-1) (120 g l(-1)) ethylene glycol and, the effect of fertilizer addition when nitrate or sulphate was provided as a terminal electron acceptor (TEA). Microorganisms in these rhizosphere soils degraded ethylene glycol using nitrate or sulphate as TEAs at close to the theoretical stoichiometric amounts required for mineralization. Although the added nitrate or sulphate was primarily used as TEA, TEAs naturally present in the soil or CO(2) produced from ethylene glycol degradation were also used, demonstrating multiple TEA usage. Anaerobic degradation produced acetaldehyde, less acetic acid, and more ethanol than under aerobic conditions. Although aerobic degradation rates were faster, close to 100% disappearance was eventually achieved anaerobically. Degradation rates under nitrate-reducing conditions were enhanced upon fertilizer addition to achieve rates similar to aerobic degradation with up to 19.3 mmol (1.20 g) of ethylene glycol degradation l(-1) day(-1) in poplar soils. This is the first study to demonstrate that microorganisms in the rhizosphere of deep rooted trees like willow and poplar can anaerobically degrade ethylene glycol. Since anaerobic biodegradation may significantly contribute to the phytoremediation of ethylene glycol in the deeper subsurface, the need for "pump and treat" or an aerobic treatment would be eliminated, hence reducing the cost of treatment.
DOI: 10.1007/s10532-008-9244-9
PubMed: 19132327
Affiliations:
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Carnegie</name><affiliation wicri:level="1"><nlm:affiliation>Chemical Engineering, Queen's University, Kingston, ON, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Chemical Engineering, Queen's University, Kingston, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Ramsay, J A" sort="Ramsay, J A" uniqKey="Ramsay J" first="J A" last="Ramsay">J A Ramsay</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:19132327</idno><idno type="pmid">19132327</idno><idno type="doi">10.1007/s10532-008-9244-9</idno><idno type="wicri:Area/Main/Corpus">003693</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Corpus" wicri:corpus="PubMed">003693</idno><idno type="wicri:Area/Main/Curation">003693</idno><idno type="wicri:explorRef" wicri:stream="Main" wicri:step="Curation">003693</idno><idno type="wicri:Area/Main/Exploration">003693</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Anaerobic ethylene glycol degradation by microorganisms in poplar and willow rhizospheres.</title><author><name sortKey="Carnegie, D" sort="Carnegie, D" uniqKey="Carnegie D" first="D" last="Carnegie">D. Carnegie</name><affiliation wicri:level="1"><nlm:affiliation>Chemical Engineering, Queen's University, Kingston, ON, Canada.</nlm:affiliation><country xml:lang="fr">Canada</country><wicri:regionArea>Chemical Engineering, Queen's University, Kingston, ON</wicri:regionArea><wicri:noRegion>ON</wicri:noRegion></affiliation></author><author><name sortKey="Ramsay, J A" sort="Ramsay, J A" uniqKey="Ramsay J" first="J A" last="Ramsay">J A Ramsay</name></author></analytic><series><title level="j">Biodegradation</title><idno type="eISSN">1572-9729</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Anaerobiosis (MeSH)</term><term>Chromatography, Gas (MeSH)</term><term>Ethylene Glycol (metabolism)</term><term>Fertilizers (MeSH)</term><term>Populus (metabolism)</term><term>Populus (microbiology)</term><term>Salix (metabolism)</term><term>Salix (microbiology)</term></keywords><keywords scheme="KwdFr" xml:lang="fr"><term>Anaérobiose (MeSH)</term><term>Chromatographie en phase gazeuse (MeSH)</term><term>Engrais (MeSH)</term><term>Populus (microbiologie)</term><term>Populus (métabolisme)</term><term>Salix (microbiologie)</term><term>Salix (métabolisme)</term><term>Éthylène glycol (métabolisme)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="metabolism" xml:lang="en"><term>Ethylene Glycol</term></keywords><keywords scheme="MESH" qualifier="metabolism" xml:lang="en"><term>Populus</term><term>Salix</term></keywords><keywords scheme="MESH" qualifier="microbiologie" xml:lang="fr"><term>Populus</term><term>Salix</term></keywords><keywords scheme="MESH" qualifier="microbiology" xml:lang="en"><term>Populus</term><term>Salix</term></keywords><keywords scheme="MESH" qualifier="métabolisme" xml:lang="fr"><term>Populus</term><term>Salix</term><term>Éthylène glycol</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Anaerobiosis</term><term>Chromatography, Gas</term><term>Fertilizers</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Anaérobiose</term><term>Chromatographie en phase gazeuse</term><term>Engrais</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">Although aerobic degradation of ethylene glycol is well documented, only anaerobic biodegradation via methanogenesis or fermentation has been clearly shown. Enhanced ethylene glycol degradation has been demonstrated by microorganisms in the rhizosphere of shallow-rooted plants such as alfalfa and grasses where conditions may be aerobic, but has not been demonstrated in the deeper rhizosphere of poplar or willow trees where conditions are more likely to be anaerobic. This study evaluated ethylene glycol degradation under nitrate-, and sulphate-reducing conditions by microorganisms from the rhizosphere of poplar and willow trees planted in the path of a groundwater plume containing up to 1.9 mol l(-1) (120 g l(-1)) ethylene glycol and, the effect of fertilizer addition when nitrate or sulphate was provided as a terminal electron acceptor (TEA). Microorganisms in these rhizosphere soils degraded ethylene glycol using nitrate or sulphate as TEAs at close to the theoretical stoichiometric amounts required for mineralization. Although the added nitrate or sulphate was primarily used as TEA, TEAs naturally present in the soil or CO(2) produced from ethylene glycol degradation were also used, demonstrating multiple TEA usage. Anaerobic degradation produced acetaldehyde, less acetic acid, and more ethanol than under aerobic conditions. Although aerobic degradation rates were faster, close to 100% disappearance was eventually achieved anaerobically. Degradation rates under nitrate-reducing conditions were enhanced upon fertilizer addition to achieve rates similar to aerobic degradation with up to 19.3 mmol (1.20 g) of ethylene glycol degradation l(-1) day(-1) in poplar soils. This is the first study to demonstrate that microorganisms in the rhizosphere of deep rooted trees like willow and poplar can anaerobically degrade ethylene glycol. Since anaerobic biodegradation may significantly contribute to the phytoremediation of ethylene glycol in the deeper subsurface, the need for "pump and treat" or an aerobic treatment would be eliminated, hence reducing the cost of treatment.</div></front></TEI><pubmed><MedlineCitation Status="MEDLINE" Owner="NLM"><PMID Version="1">19132327</PMID><DateCompleted><Year>2009</Year><Month>10</Month><Day>26</Day></DateCompleted><DateRevised><Year>2013</Year><Month>11</Month><Day>21</Day></DateRevised><Article PubModel="Print-Electronic"><Journal><ISSN IssnType="Electronic">1572-9729</ISSN><JournalIssue CitedMedium="Internet"><Volume>20</Volume><Issue>4</Issue><PubDate><Year>2009</Year><Month>Jul</Month></PubDate></JournalIssue><Title>Biodegradation</Title><ISOAbbreviation>Biodegradation</ISOAbbreviation></Journal><ArticleTitle>Anaerobic ethylene glycol degradation by microorganisms in poplar and willow rhizospheres.</ArticleTitle><Pagination><MedlinePgn>551-8</MedlinePgn></Pagination><ELocationID EIdType="doi" ValidYN="Y">10.1007/s10532-008-9244-9</ELocationID><Abstract><AbstractText>Although aerobic degradation of ethylene glycol is well documented, only anaerobic biodegradation via methanogenesis or fermentation has been clearly shown. Enhanced ethylene glycol degradation has been demonstrated by microorganisms in the rhizosphere of shallow-rooted plants such as alfalfa and grasses where conditions may be aerobic, but has not been demonstrated in the deeper rhizosphere of poplar or willow trees where conditions are more likely to be anaerobic. This study evaluated ethylene glycol degradation under nitrate-, and sulphate-reducing conditions by microorganisms from the rhizosphere of poplar and willow trees planted in the path of a groundwater plume containing up to 1.9 mol l(-1) (120 g l(-1)) ethylene glycol and, the effect of fertilizer addition when nitrate or sulphate was provided as a terminal electron acceptor (TEA). Microorganisms in these rhizosphere soils degraded ethylene glycol using nitrate or sulphate as TEAs at close to the theoretical stoichiometric amounts required for mineralization. Although the added nitrate or sulphate was primarily used as TEA, TEAs naturally present in the soil or CO(2) produced from ethylene glycol degradation were also used, demonstrating multiple TEA usage. Anaerobic degradation produced acetaldehyde, less acetic acid, and more ethanol than under aerobic conditions. Although aerobic degradation rates were faster, close to 100% disappearance was eventually achieved anaerobically. Degradation rates under nitrate-reducing conditions were enhanced upon fertilizer addition to achieve rates similar to aerobic degradation with up to 19.3 mmol (1.20 g) of ethylene glycol degradation l(-1) day(-1) in poplar soils. This is the first study to demonstrate that microorganisms in the rhizosphere of deep rooted trees like willow and poplar can anaerobically degrade ethylene glycol. 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