Characterization of the uptake and accumulation of phthalic acid esters in air by grape leaves
[Objective]To investigate the absorption and accumulation properties of PAEs in air by grape leaves and their internal constituents,and to determine the capability and pattern of grape leaves to ab-sorb and accumulate DBP,DEHP,and DIBP from the air.[Method]An experiment was conducted in which potted grapes were placed under a glass cover and a Petri dish containing a methanol solution contain-ing a mixture of DBP,DEHP,and DIBP was placed inside the glass cover,allowing the PAEs to volatilize naturally and be absorbed and accumulated by the plants.This method was used to study the absorption and accumulation properties of the leaves and their internal constituents,such as fats,sugars,and proteins,on PAEs.[Result]The accumulation of DBP,DEHP,and DIBP in grape leaves of the three cultivars in-creased with increasing PAEs treatment concentrations,and the differences in the content of each compo-nent and the combined content of the three cultivars were notably different at different contamination levels(P<0.05).The highest accumulation was observed for DEHP in grape leaves,with accumulation percent-ages ranging from 92.90%to 93.86%in high comtamination treatments,followed by DBP and DIBP.DBP,DEHP,and DIBP were found in leaf lipids,sugars,and proteins.The content of the three compounds in each pollution treatment was significantly different from the control(P<0.05),with the highest concen-tration found in fats(up to 87.06 mg/kg).The highest values in sugars and proteins were 5.818 mg/kg and 3.793 mg/kg,respectively.When evaluating the correlation between the accumulation ability of grape leaves for PAEs and their constituents,a significant positive relationship was observed between the accumu-lation of PAEs in grape leaves and the content of PAEs in fat,while no notable correlation was found with sugar or protein.[Conclusion]Grape leaves can absorb and accumulate PAEs from the air,and this accumu-lation ability is strongly linked to their fat content.
grape leafphthalic acid esters(PAEs)airuptake and accumulation
万方数据
维普
