title: Influence of Soil Factors on the Stereoselective Fate of a Novel Chiral Insecticide, Paichongding, in Flooded Paddy Soils.
abstract: In this study, the fate of paichongding was investigated in three soils with contrasting soil properties. In general, low soil pH has the potential to retard the mineralization and promote the dissipation of paichongding and the formation of its primary transformation product and to accelerate the formation of bound residue. The dissipation of paichongding stereoisomers was very fast and diastereoselective. This selectivity was found only between diastereomers and not between enantiomers and was observed to be soil dependent. In the acidic soil, the enantiomers (5R,7R)- and (5S,7S)-paichongding were degraded more quickly than (5R,7S)- and (5S,7R)-paichongding, whereas a contrary trend was observed in the neutral soil, and such selectivity did not occur in the alkaline soil. The OM and clay contents also played important roles in the fate of paichongding. This effect of soil properties should be considered in risk assessment of chiral pesticides and their application in the field.
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Juying
authors: J
authors: Li
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Tuo
authors: T
authors: Huang
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Lizong
authors: L
authors: Li
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Tengda
authors: T
authors: Ding
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Hong
authors: H
authors: Zhu
authors: Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University , Shenzhen 518060, China.
authors: Bo
authors: B
authors: Yang
authors: Institute of Nuclear Agricultural Sciences, Zhejiang University , Hangzhou 310029, China.
authors: Qingfu
authors: Q
authors: Ye
authors: Department of Environmental Sciences, University of California , Riverside, California 92521, United States.
authors: Jay
authors: J
authors: Gan
mesh_terms: D000538:Aluminum Silicates; D000693:Anaerobiosis; D053961:Azabicyclo Compounds / Q000737:chemistry* / Q000493:pharmacokinetics; D001673:Biodegradation, Environmental; D000077215:Clay; D055868:Floods; D006863:Hydrogen-Ion Concentration; D007306:Insecticides / Q000737:chemistry* / Q000493:pharmacokinetics; D007700:Kinetics; D010573:Pesticide Residues / Q000737:chemistry; D011725:Pyridines / Q000737:chemistry* / Q000493:pharmacokinetics; D012987:Soil / Q000737:chemistry*; D013237:Stereoisomerism
chemical_list: D000538:Aluminum Silicates; D053961:Azabicyclo Compounds; D007306:Insecticides; D010573:Pesticide Residues; D011725:Pyridines; D012987:Soil; C588015:paichongding; D000077215:Clay
keywords: bound residue; degradation; extractable residue; mineralization; paichongding; soil properties