کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
5756067 1622543 2018 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Enantio-selective molecular dynamics of (±)-o,p-DDT uptake and degradation in water-sediment system
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست بهداشت، سم شناسی و جهش زایی
پیش نمایش صفحه اول مقاله
Enantio-selective molecular dynamics of (±)-o,p-DDT uptake and degradation in water-sediment system
چکیده انگلیسی


- Simultaneous molecular uptake and degradation of (±)-o,p-DDT.
- Both uptake and degradation of (-)-enantiomer are higher than (+)-o,p- DDT.
- Both uptake and degradation are liable for removal of (±)-o,p-DDT from nature.
- Uptake plays crucial role for removal of (±)-o,p-DDT from nature.

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 7.0 μg L−1 concentration of o,p-DDT, 60 min contact time, 5.0 pH, 6.0 g L−1 amount of reverine sediment and 25 °C temperature. The maximum degradation of both (-)- and (+)-o,p-DDT was obtained with 16 days, 0.4 μg L−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.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Environmental Research - Volume 160, January 2018, Pages 353-357
نویسندگان
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