The plant samples of Bidens pilosa were collected from a coal gangue vacant site and its surrounding area, located in central China, to study the remediation effect of the plant species on heavy metal (HM) contamination in both natural and electrokinetic (EK) conditions. The analytical results showed that the effect of phytoextraction and bioconcentration on the heavy metals in the sample of the EK group is more significant than those in the other control group. Compared with the results of natural condition, under the EK condition the concentrations of cadmium (Cd), lead (Pb), copper (Cu) and zinc (Zn) in the stems and leaves of the Bidens pilosa increased to 0.40 mg/kg, 4.23 mg/kg, 7.27 mg/kg, 830.24 mg/kg, respectively, with their increments of 292%, 1731%, 141%, 2076%. For root samples, the Cd, Pb, Cu and Zn concentrations increased to 0.52 mg/kg, 4.36 mg/kg, 10.87 mg/kg, and 98.12 mg/kg and the increase rates were 1034%, 140%, 29%, and 181%, respectively. The phytoextraction efficiency of the Bidens pilosa was significantly higher than that of control group. The removal efficiency of Cd, Pb, Cu and Zn in soil increased to 26%, 72%, 27%, and 79% with the EK applied. In addition, the mechanism of HM migration, extraction and enrichment in Bidens pilosa under the EK condition was discussed.

In the process of “industrialization, urbanization, and agricultural modernization”（hereinafter referred to shortly as “IUAM”）in Henan province, water resources issues have caused deterioration of water environments and water attenuation. These are the region's most common and prominent issues, caused by improper activities, water environmental conflict and ignoring the results of local water environment carrying capacity. This environmental problem is getting worse and worse, seriously restricting the region’s “IUAM” healthy development. According to coordinated development between “IUAM” and water resources bearing capacity, we carry out the environmental management of water resources policy research and design and put forward some corresponding policies and proposals.