The DEHP Cumulation Ability Of Plants And The Specificity Of The Plants With Strong DEHP Cumulation Ability

DEHP [Di-(2-ethylhexyl) Phthalate], the phthalic ester compounds, is a primary plasticizer, which is one of the most widely used synthetic organic compounds and has a larger production in the world. DEHP and plastic components are not combined with covalent chemical bonds, therefore, DEHP can easily releases to environment as well as pollutes air, water and soil. Research has proved that human being and animals cumulate DEHP through several ways such as diet, touching to plastic products and breathing from air, and DEHP has a potential toxicity.In this paper, we select pot-cultivation experiment to determine the DEHP cumulation ability of 15 different plants using GC/MS detection technology.The results were as follows: (1) a DEHP determination method based on GC/MS was established. The method was of good separation ability and accuracy. (2) Among the 15 plants, Benincasa hispida leaves showed super strong cumulation ability of DEHP, but there was difference between the species of Benincasa hispida. The cumulation ability of Guangdonghei species was significantly stronger than that of Wuyezao species while Daucus carota, Cucumis Sativi and Brassica pekinensis. Glycine max (L.) Merr., Cucurbita, Momordica charantiap, Lactuca sativa, Capsicum frutescens L., Luffa cylindrica (L.) Roem. and Ipomoea aquatica showed inferior cumulation ability. Triticum aestivum, Zea mays L. and Solanum Iycopersicum had weaker cumulation ability capacity. Therefore, Benincasa hispida was chosen for the repair of DEHP pollution. (3) The correlation between the stomatal characteristics including stomatal density, stomatal length and width, stomatal pore-aspect ratio and the DEHP cumulation ability of plants was of no significant difference. The characteristics of the guard cells, hair characteristics of the stratum and corneum decoration features by the scanning electron microscope had no significant differences between plants with high cummulation ability and low cummulation ability. (4) It may be inferred that the DEHP cumulation ability of plants was nothing to do with the composition and content of fatty acid. (5) Through reseach of the wax in fifteen different plants. We could initially confirm that DEHP cumulation ability of plants was related to Nonadecanenonadecane, methyl palmitate, 1-octadecene eicosane and 1-eicosenethe in wax components of the fifteen plants. (6) The cumulation ability of DEHP in organs of different plant leaves was of significant difference, and the organs of DEHP cumulation ability in the same plant had a order, cell wall and not broken residue> cell soluble components> chloroplast >mitochondrial> protein ingredients.