Abstract：
:Enantio-selective molecular dynamics of (±)-o,p-DDT uptake and degradation in water-sediment system is described. Both uptake and degradation processes of (-)-o,p-DDT were slightly higher than (+)-o,p-DDT enantiomer. The optimized parameters for uptake were 7.0μgL-1 concentration of o,p-DDT, 60min contact time, 5.0pH, 6.0gL-1 amount of reverine sediment and 25°C temperature. The maximum degradation of both (-)- and (+)-o,p-DDT was obtained with 16 days, 0.4μgL-1 concentration of o,p-DDT, pH 7 and 35°C temperature. Both uptake and degraded process followed first order rate reaction. Thermodynamic parameters indicated exothermic nature of uptake and degradation processes. Both uptake and degradation were slightly higher for (-)-enantiomer in comparison to (+)-enantiomer of o,p-DDT. It was concluded that both uptake and degradation processes are responsible for the removal of o,p-DDT from nature but uptake plays a crucial role. The percentage degradations of (-)- and (+)-o,p-DDT were 30.1 and 29.5, respectively. This study may be useful to manage o,p-DDT contamination of our earth's ecosystem.
journal_name
Environ Resjournal_title
Environmental researchauthors
Ali I,Alharbi OML,Alothman ZA,Alwarthan Adoi
10.1016/j.envres.2017.10.022subject
Has Abstractpub_date
2018-01-01 00:00:00pages
353-357eissn
0013-9351issn
1096-0953pii
S0013-9351(17)31212-4journal_volume
160pub_type
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