DDT Persistence and Volatility as Affected by Management Practices after 23 Years

Spencer, W. F.; Singh, Gulab; Taylor, Caroline; LeMert, Rose Ann; Cliath, M. M.; Farmer, W. J.

doi:10.2134/jeq1996.00472425002500040024x

Cited by 70 publications

(33 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…These findings are consistent with previous results from our research group (Feist et al 2005), where DDE was the primary chlorinated contaminant detected in Lower Columbia River white sturgeon gonads and livers (the same fish we obtained blood plasma samples from). The greater concentration of DDE over DDD, and DDT in our study and by Feist et al (2005), suggests that the source of DDE is from agricultural runoff, since environmental degradation of DDT into primarily DDE involves aerobic pathways (Spencer et al 1996). Although plasma samples were analyzed for 17 OC pesticides, we statistically analyzed only the P DDT (DDE + DDD + DDT), since only DDE and DDD were measured in all samples above the detection limit and made up the majority of the total plasma pesticide burden.…”

Section: Resultsmentioning

confidence: 57%

Using Blood Plasma for Monitoring Organochlorine Contaminants in Juvenile White Sturgeon, Acipenser transmontanus, from the Lower Columbia River

Gundersen

Webb

Fink

et al. 2008

Bull Environ Contam Toxicol

View full text Add to dashboard Cite

Organochlorine (OC) pesticide concentrations in blood plasma samples from 88 juvenile white sturgeon collected from the lower Columbia River were measured and compared to plasma sex steroid and OC tissue levels previously measured in corresponding fish. Significant squared correlation coefficients between summation operator DDT concentrations in sturgeon plasma and gonads and livers were 0.37 and 0.32, respectively. Significant negative correlations between plasma testosterone concentration and plasma Sigma DDT concentration in male fish (r(2)=0.26), plasma 17beta estradiol concentration and plasma Sigma DDT concentration in female fish (r(2)=0.38) and condition factor and plasma Sigma DDT concentration in all fish were found (r(2)=0.17). These results suggest that blood plasma may be a suitable nondestructive method for monitoring adult sturgeon population for persistent OC contaminants.

show abstract

Section: Resultsmentioning

confidence: 57%

Using Blood Plasma for Monitoring Organochlorine Contaminants in Juvenile White Sturgeon, Acipenser transmontanus, from the Lower Columbia River

Gundersen

Webb

Fink

et al. 2008

Bull Environ Contam Toxicol

View full text Add to dashboard Cite

show abstract

“…Spencer et al (1996) found a maximum ΣDDT concentration of 4800 ng g -1 in agricultural soils in California. Dimond and Owen (1996) reported a maximum ΣDDT concentration in Maine forest soils of 1898 ng g -1 .…”

Section: Persistence Of Ddt At Point Peleementioning

confidence: 95%

“…The compound DDT (dichloro-diphenyl-trichloroethane) degrades along two principal degradation pathways; DDT degrades to DDE (dichloro-diphenyl-dichloroethylene) by dechlorination in aerobic soils and DDT degrades to DDD (dichloro-diphenyl-dichloroethane) by reductive dechlorination in anaerobic or flooded soil (Guenzi and Beard 1968;Guenzi et al 1971;Farmer et al 1974;Aislabie et al 1997;Boul et al 1994;Spencer et al 1996). The half-life for the transformation of DDT to DDE under aerobic conditions and in temperate soils varies due to soil temperature, moisture content, and organic carbon content.…”

mentioning

confidence: 99%

Distribution and persistence of DDT in soil at a sand dune-marsh environment: Point Pelee, Ontario, Canada

Crowe¹,

Smith²

2007

Can. J. Soil. Sci.

View full text Add to dashboard Cite

Crowe, A. S. and Smith, J. E. 2007. Distribution and persistence of DDT in soil at a sand dune-marsh environment: Point Pelee, Ontario, Canada. Can. J. Soil Sci. 87: 315-327. DDT was applied at Point Pelee, Ontario, Canada, between 1948 and1970 for mosquito control in recreational areas and pest control in former agricultural areas. Recent soil sampling programs produced 275 analyses enabling a statistical comparison of DDT concentrations with land use areas, soil conditions, and hydrologic characteristics. Concentrations of ΣDDT ranged over several orders of magnitude, with the highest concentrations (maximum 316 000 ng g -1 ) in former agricultural areas and the lowest concentrations in the natural sand dunes (maximum of 116 ng g -1 ). DDT is undergoing degradation at Point Pelee along two pathways. DDT is transformed aerobically to DDE within the sandy soils exhibiting average %DDT, %DDE and %DDD of 40%, 55%, and 5% of ΣDDT, respectively. DDT is transformed anaerobically to DDD and DDE within the marsh and flooded soils averaging 14% DDT, 44% DDE, and 42% DDD, respectively. The half-lives for the transformation of DDT to DDE within the well-drained and aerobic sandy soils at Point Pelee are highly variable and were estimated to range from 20 to 50 yr. Given the high concentrations of ΣDDT at Point Pelee and the long half-life, it is expected that DDT will remain at concentrations of concern for many decades. , on a appliqué du DDT à la pointe Pelée, une région de l'Ontario (Canada), pour lutter contre les moustiques dans les aires récréatives et pour combattre les parasites dans les anciennes zones agricoles. De récents programmes d'échantillonnage du sol ont permis 275 analyses qui devaient servir à comparer la concentration de DDT selon la vocation des terres, l'état du sol et l'hydrologie. La concentration de ΣDDT varie de plusieurs ordres de grandeur, la plus élevée (maximum de 316 000 ng/g) ayant été observée dans les vieilles zones agricoles et la plus faible, dans les dunes de sable naturelles (maximum de 116 ng/g). À la pointe Pelée, le DDT se dégrade de deux façons. Il se transforme de manière aérobie en DDE dans les sols sablonneux, avec une moyenne pour le DDT, le DDE et le DDD de 40 %, 55 % et 5 % du ΣDDT, respectivement, et de manière anaérobie en DDD et DDE dans les marais et les sols inondés avec une moyenne de 14 % de DDT, de 44 % de DDE et de 42 % de DDD, respectivement. La demi-vie nécessaire à la transformation du DDT en DDE dans les sols bien drainés et sablonneux aérobies de la pointe Pelée varie considérablement, avec une fourchette estimative de 20 à 50 ans. Étant donné la forte concentration de ΣDDT à la pointe Pelée et la longue demi-vie du DDT, on s'attend à ce que la concentration de ce pesticide demeure problématique pendant de nombreuses décennies encore.

show abstract

“…Residue levels of organochlorine pesticides are affected by application history, agricultural practices, soil phys- ico-chemical properties, as well as physico-chemical properties of agrochemicals and meteorological factors such as temperature and rainfall etc. (Szeto and Price, 1991;Boul et al, 1994;Spencer et al, 1996). OCPs are hydrophobic and considered to be easily adsorbed by soil organic matter.…”

Section: Factors Affecting Residue Levelsmentioning

confidence: 99%

Organochlorine pesticides (DDTs and HCHs) in soils from the outskirts of Beijing, China

et al. 2005

View full text Add to dashboard Cite

DDT Persistence and Volatility as Affected by Management Practices after 23 Years

Abstract: ABSTRACT

Cited by 70 publications

References 20 publications

Using Blood Plasma for Monitoring Organochlorine Contaminants in Juvenile White Sturgeon, Acipenser transmontanus, from the Lower Columbia River

Using Blood Plasma for Monitoring Organochlorine Contaminants in Juvenile White Sturgeon, Acipenser transmontanus, from the Lower Columbia River

Distribution and persistence of DDT in soil at a sand dune-marsh environment: Point Pelee, Ontario, Canada

Organochlorine pesticides (DDTs and HCHs) in soils from the outskirts of Beijing, China

Contact Info

Product

Resources

About