skip to main content
Idioma:

Evidence of Enantioselective Degradation of α-Hexachlorocyclohexane in Groundwater

Law, Sheryl A ; Bidleman, Terry F ; Martin, Michael J ; Ruby, Michael V

Environmental science & technology, 2004-03, Vol.38 (6), p.1633-1638 [Periódico revisado por pares]

Washington, DC: American Chemical Society

Texto completo disponível

Citações Citado por
  • Título:
    Evidence of Enantioselective Degradation of α-Hexachlorocyclohexane in Groundwater
  • Autor: Law, Sheryl A ; Bidleman, Terry F ; Martin, Michael J ; Ruby, Michael V
  • Assuntos: Applied sciences ; Biodegradation ; Biodegradation, Environmental ; Carcinogens - metabolism ; Environmental Monitoring ; Exact sciences and technology ; Groundwater ; Groundwaters ; Hexachlorocyclohexane - metabolism ; Natural water pollution ; Pollution ; Rivers ; Soil Microbiology ; Soil Pollutants - metabolism ; Solvents ; Water Pollutants, Chemical - metabolism ; Water treatment and pollution
  • É parte de: Environmental science & technology, 2004-03, Vol.38 (6), p.1633-1638
  • Notas: ark:/67375/TPS-GR9CB63V-3
    istex:AEF0FBF572783FF7862D953695D92D3E63EF276D
    ObjectType-Article-2
    SourceType-Scholarly Journals-1
    ObjectType-Feature-1
    content type line 23
  • Descrição: In the fall of 2000, 34 groundwater samples were collected from beneath an active pesticide reformulating and packaging facility in coastal northeastern Florida to measure the enantiomer fractions (EFs) of α-hexachlorocyclohexane (α-HCH) as an indicator of biodegradation of this chlorinated pesticide in groundwater. Concentrations of α-HCH as high as 500 μg/L were observed beneath the historical source area and decreased with distance downgradient. Seventy-eight percent of the EF values were greater than 0.504 and ranged up to 0.890, indicating that the (−)-α-HCH enantiomer is preferentially degraded relative to the (+)-α-HCH enantiomer at this site. Samples taken from the groundwater that flows north from the historical disposal facility to a local discharge point at a creek did not indicate enantioselective degradation (EF values ranged from 0.495 to 0.512). The acidity (pH 3.7−4.6) and short flow path to the creek for this lobe of the groundwater plume likely preclude biodegradation of α-HCH. In contrast, the neutral lobe of the groundwater plume, which flows eastward from the historical source area, demonstrated enantioselective degradation (EF values ranged from 0.500 to 0.890 and increased with distance from the source area). Groundwater conditions beneath this portion of the site are conducive to biodegradation of HCH owing to anaerobic reducing conditions and lengthy travel times, and the chiral signatures for α-HCH provide evidence that biological degradation is occurring beneath this portion of the site.
  • Editor: Washington, DC: American Chemical Society
  • Idioma: Inglês
Links
Voltar para lista de resultados
Resultado  1 AvançarIr para próxima página

  • Realização: ABCD-USP USP   Logos de Redes Sociais: Freepik

Buscando em bases de dados remotas. Favor aguardar.