Int J Phytoremediation. 2014;16(6):609-20. doi: 10.1080/15226514.2013.803021.
This study was conducted to investigate the uptake, accumulation and the enhanced dissipation of di(2-ethylhexyl) phthalate (DEHP) spiked in soil (with a concentration of 117.4 +/- 5.2 mg kg(-1)) by eleven plants including eight maize (Zea mays) cultivars and three forage species (alfalfa, ryegrass and teosinte). The results showed that, after 40 days of treatment, the removal rates of DEHP ranged from 66.8% (for the control) to 87.5% (for the maize cultivar of Huanong-1). Higher removal rate was observed during the first 10 days than the following days. Plants enhanced significantly the dissipation of DEHP in soil. Enhanced dissipation amount in planted soil was 13.3-122 mg pot(-1) for DEHP, and a net removal of 2.2%-20.7% of the initial DEHP was obtained compared with non-plant soil. The contribution of plant uptake to the total enhanced dissipation was < 0.3%, and the enhanced dissipation of soil DEHP might be derived from plant-promoted biodegradation and sorption stronger to the soil. Nevertheless, the capability in accumulation and enhanced dissipation of DEHP from spiked soils varied within different species and cultivars.
本研究旨在探究 11 种植物（包括 8 种玉米品种和 3 种饲草品种）对土壤中添加的邻苯二甲酸二（2-乙基己基）酯（DEHP）的吸收、积累和增强降解作用，土壤中 DEHP 的浓度为 117.4±5.2mg/kg。结果表明，在 40 天的处理后，DEHP 的去除率范围为 66.8%（对照）至 87.5%（农华 1 号玉米品种）。在前 10 天观察到的去除率高于随后的天数。植物显著增强了土壤中 DEHP 的降解。在种植土壤中，DEHP 的增强降解量为 13.3-122mg 盆（-1），与非种植土壤相比，初始 DEHP 的净去除率为 2.2%-20.7%。植物吸收对总增强降解的贡献<0.3%，土壤中 DEHP 的增强降解可能源于植物促进的生物降解和对土壤更强的吸附作用。然而，不同物种和品种对添加土壤中 DEHP 的积累和增强降解能力存在差异。
