Phytoremediation:a new approach for the remediationof heavy metal-contaminated soils
Zhou Guohua 1,2 Huang Huaizeng 3 He Hongliao 3(1. Institute of Geophysical and Geochemical Exploration, Langfang 065000; 2.China University of Geosciences, Beijing 100083; 3. National Research Center of Geoanalysis, Beijing 100037)
Due to their high implementing costs, strict technical demands and probably serious damage on soil texture, conventional ways are difficult to be selected for contaminated soil remediation, especially for middle and weak heavy metal-contaminated soil on a large scale. As more and more hyperaccumulator plants have been found, soil remediation using plants was put forward about decades ago, and has become a research focus in environmental technology. It has been indicated that phytoextraction, phytovolalization, rhizofitration and phytostabilization are the main mechanisms for cleaning up contaminated soil and water.A lot of approaches have achieved in the investigation and cultivation of hyperaccumulator plants, rhizosphere processes and manipulation, the mechanisms of hyperaccumulation, tolerance and detoxification to heavy metals. It is expected to get a breakthrough in this technology as the introduction of molecular biology and gene technology.
【CateGory Index】： X131.3