Distribution of DDT and toxaphene in Houston black clay on three watersheds

Toxaphene dissipation from treated cotton field environments: component residual behavior on leaves and in air, soil, and sediments determined by capillary gas chromatography

“…Toxaphene has been considered to be one of the more persistent pesticides in soil (Edwards, 1964;Swoboda et al, 1971). Indeed, we found that short-term decline in aerated top soil was slow, with half-lives on the order of 2 months (top 2.5 cm) and 4 months (top 7.5 cm).…”

Dissipation of pesticides from soil by volatilization of degradation products. I. Lindane and DDT

“…'-ddt (k \/k '2 = 1), the ratio of p,p'-dde/p,p'-ddt in the vapor phase can be estimated from relative concentrations of each in any soil using Equation 2. For example, if equal concentrations of p,p'-dde and p,p'-ddt are found in soil, as reported by Swoboda et al (1971), the concentration of , '-DDE in the vapor phase in and above the soil will be eight times greater than that of p,p'ddt.…”

Degradation of 1,1-diphenylethylene by mixed cultures

“…The decision of the Canadian and American governments respectively to ban and curtail the use of l,l,l-trichloro-2,2-bis(pchloropheny1)ethane (DDT) has led to speculation that the primary aerobic degradation product of DDT i.e. 1,l-bis(p-chloropheny1)-2,2-dichloroethylene (DDE) may present more of a biosphere accumulation problem since it is more resistant to microbial breakdown (4,13). In the study which follows, we have chosen to use 'Received September 27, 1973. a DDE analog, 1,l-diphenylethylene, to study its degradation pathway by nonaxenic sewage cultures, and to isolate and identify some of the microorganisms responsible for its catalysis.…”