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Degradation Of Ddt In The Environment. Except for the above degradation pathway DDT can degrade to diverse metabolites before eventually being mineralized Wedemeyer 1967 Quensen et al 1998 Mwangi et. However present studies indicate that in sub-tropical marine environment. 111-Trichloro-22-bis- 4-chlorophenylethane DDT the first chlorinated organic insecticide is a widely distributed and persistent xenobiotic contaminant in the environment. It has been observed that releases of DDT into the marine environment either by agricultural runoff or dumped chemical waste will result in a very slow degradation of 966 this compound Carvalho et al 1992 and enhanced bioaeeumulation and food chain transfer in comparison to the terrestrial environment.
DDT removal from the model environment is by degradation in soil only represented as a first-order process 405 109s1at 298 K Hornsby et al 1996 and assumed to. The DDT in the sea water was aerobically degraded its main degradation product was DDE and the ratios of DDDDDE to DDTs pp-DDEpp-DDDop-DDTpp-DDT was less than 05 whereas the DDT in sediments and shellfishes was anaerobically degraded its main degradation product was DDD and the ratios of DDDDDE to DDTs was greater than 05 suggesting that there was a small. Biodegradation of DDT residues can proceed in soil albeit at a slow rate. Instead it is deposited and stored in the fatty tissues. DDT sorbs to sedi-ments and particulate matter in the aquatic environment. They include the addition of DDTmetabolising microbes to contaminated soils andor the manipulation of environmental conditions to enhance the activity of these microbes.
There are various method for biological degradation of DDT like fugal degradation aerobic degradation and anaerobic degradation.
However most studies took dicofol as a major source of DDT for granted Qiu et al 2005 Yang et al 2008 Li et al 2015 with few efforts made on this DDT degradation pathway involving pp-dicofol in the environment. Although 111-trichloro-22-bisp-chlorophenylethane DDT is very persistent in the environment 11-dichloro-22-bisp-chlorophenylethylene DDE a degradation product of DDT is generally the constituent most widely detected in the environment and DDE is also resistant to further biotransformation. To enhance degradation in situ a number of strategies are proposed. That is it takes about eight years for an animal to metabolize half. Degrade DDT and that the rate of degradation is dependent on the presence and numbers of microbes in the soil with the required degradative ability environmental factors and access of the microbes to DDT. Instead it is deposited and stored in the fatty tissues.