Enantio-selective molecular dynamics of (±)- o,p -DDT uptake and degradation in water-sediment system

Ali, Imran; Alharbi, Omar M.L.; ALOthman, Zeid A.; Al–Warthan, Abdulrahman

doi:10.1016/j.envres.2017.10.022

Cited by 8 publications

(2 citation statements)

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“…Among many pesticides, some are chiral in nature and exist in racemic form. The two enantiomers have different insecticidal activities and biodegradation in the environment . The rising alerts on the side effects of chiral chemicals on nontarget animals, human beings and ecology, the researchers, academicians, and Government authorities are promoting the use of enantiomerically pure agrochemicals .…”

Section: Introductionmentioning

confidence: 99%

“…The two enantiomers have different insecticidal activities and biodegradation in the environment. [19][20][21][22][23][24][25][26][27] The rising alerts on the side effects of chiral chemicals on nontarget animals, human beings and ecology, the researchers, academicians, and Government authorities are promoting the use of enantiomerically pure agrochemicals. Therefore, it is essential to study the sorption and biodegradation of racemic and enantiomeric pesticides to determine their fates in the ecology.…”

Section: Introductionmentioning

confidence: 99%

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Enantioselective degradation of dufulin pesticide in water: Uptake, thermodynamics, and kinetics studies

et al. 2019

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Kudzu (Pueraria thunbergiana) plant extract impregnated sediments were used for abiotic and biotic uptakes and biodegradation. The optimized conditions were 25 μg L−1 concentration, 7 days for abiotic uptake and 56 days for biotic uptake and biodegradation, dose 2 g L−1, 7 pH, and 35°C temperature. The amount removed of dufulin was 32.6% in abiotic conditions while these were 90% in the case of biotic uptake and biodegradation. Enantioselective biodegradation indicated that S‐(+)‐enantiomer degraded faster (90%) than R‐(−)‐enantiomer (87%). The data for abiotic and biotic uptakes and biodegradation followed well Langmuir, thermodynamics, and kinetics models. All these processes followed pseudo first‐order kinetics. It was observed that biodegradation was three times responsible for dufulin removal than simple sorption uptake (abiotic and biotic). The abiotic and biotic uptakes and biodegradation were quite fast and endothermic nature. The developed method may be used to remove the racemic and enantiomeric dufulin in water.

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Section: Introductionmentioning

confidence: 99%