Abstract: A plant-microorganism combined method for phhytoremediation of organic contaminated soil; i.e., an ornamental plant (Impatiens balsamina L.)—microorganisms (petroleum hydrocarbon degrading mixed microbes) combined method for enhanced phytoremediation of petroleum contaminated soil is disclosed. The inoculated petroleum degrading mixed microbes can not only degrade contaminants in soil directly but also secretes chemical substances which are helpful to relieve the toxic effects on the Impatiens balsamina L. In return, the Impatiens balsamina L. releases photosynthesis products into the soil, so as to enhance microbial activity and quantity, and assist the microorganisms in degrading target contaminates more effectively and efficiently. Repeating the processes mentioned above is able to continuously reduce petroleum hydrocarbon contaminants in the soil until the residual content of contaminants meets the environmental safety standard.

Abstract: A plant-microorganism combined method for phhytoremediation of organic contaminated soil; i.e., an ornamental plant (Impatiens balsamina L.)—microorganisms (petroleum hydrocarbon degrading mixed microbes) combined method for enhanced phytoremediation of petroleum contaminated soil is disclosed. The inoculated petroleum degrading mixed microbes can not only degrade contaminants in soil directly but also secretes chemical substances which are helpful to relieve the toxic effects on the Impatiens balsamina L. In return, the Impatiens balsamina L. releases photosynthesis products into the soil, so as to enhance microbial activity and quantity, and assist the microorganisms in degrading target contaminates more effectively and efficiently. Repeating the processes mentioned above is able to continuously reduce petroleum hydrocarbon contaminants in the soil until the residual content of contaminants meets the environmental safety standard.

Abstract: A method for remediating soil which is contaminated by an individual or a mixture of Cd and Pb with a hyperaccumulator Emilia sonchifolia L. includes steps of: planting seeds or seedlings of Emilia sonchifolia L. in soil which is contaminated by an individual or a mixture of Cd and Pb; watering regularly to maintain the soil moist; after Emilia sonchifolia L. flowers or completely matures, removing all of or an aboveground part of the plant from a contaminated spot of the soil and disposing the removed plant properly; repeating the above steps until a Cd and Pb content of the soil fall within an environmental security standard. Besides being adaptable and widely available, the Emilia sonchifolia L. is both a Cd hyperaccumulator and a Pb hyperaccumulator by respectively satisfying four indexes of the Cd hyperaccumulator and the Pb hyperaccumulator.