Brassica rapa is a plant species that can germinate and grow in mixed contaminated soil with PAH and metals (Cr, Pb and Cd). This plant was selected among 14 plant species for electro-phytoremediation tests because its fast germination and growth in contaminated soil. The influence of type of the electric field (AC, DC) and mode of application (continuous, periodic and polarity inversion) was studied in the electro-phytoremediation tests. The application of 1 ACV/cm potential gradient around B. rapa resulted in the effective elimination of anthracene and phenanthrene, but only minor metal removal. The results of this work suggest that alternating current (AC) may be the most suitable electric field for large scale applications. The spatial configuration of electrodes affects the distribution of the electric field in the soil. Various spatial distribution of electrodes have been tested and it has been identified that parallel anodes and cathodes on the soil surface are the most appropriate configuration for field scale applications. Other configurations can be used to concentrate the contaminant around the growing pant or to transport the contaminants from deep soil layers to the rhizosphere.

中文翻译：

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电流增强对混合污染土壤的植物修复作用。

甘蓝型油菜是可以在多环芳烃和金属（铬，铅和镉）混合污染土壤中发芽和生长的植物。由于该植物在受污染的土壤中快速发芽和生长，因此从14种植物中进行了电植物修复测试。在电植物修复试验中研究了电场类型（交流，直流）和施加方式（连续，周期性和极性反转）的影响。在芜菁双歧杆菌周围施加1 ACV / cm的电势梯度可有效消除蒽和菲，但仅能去除少量的金属。这项工作的结果表明，交流电（AC）可能是大规模应用中最合适的电场。电极的空间配置会影响土壤中电场的分布。已经测试了电极的各种空间分布，并且已经确定，土壤表面上平行的阳极和阴极是最适合现场规模应用的配置。其他配置可用于将污染物集中在生长的长裤周围，或将污染物从深层土壤输送到根际。