Uptake pathway of phthalic acid esters (PAEs) by Brassica Parachinensis

Using glasshouse and clean soil covering on polluted soil to control PAEs sources, Brassica Parachinensis was pot-cultured, and the concentrations of PAEs in Brassica Parachinensis were detected by gas chromatography-mass spectrum (GC/MS). The results showed that concentrations of both DBP and DEHP in the shoots growing in polluted soil were only a few higher than those of them in the shoots growing in polluted soil covered with original soil. DBP and DEHP in the shoots of Brassica Parachinensis derived dominantly from roots uptake, leaf uptake of DBP and DEHP volatilizing from polluted soil was minor. Concentrations of DBP in Brassica Parachinensis (both shoots and roots) growing in glasshouse were higher than those of that in Brassica Parachinensis growing in non-glasshouse. But similar situations were not observed for DEHP. In the shoots concentrations of DBP were always higher than those of DEHP, but in the roots concentrations of DEHP were always higher than those of DBP on the contrary, which indicated that roots uptake and translocation was more important for DBP.