Diffusion Model of Heavy Metal Loss in Mining Area and its High Efficient Prevention and Cure

In order to high efficiently prevent and cure the diffusion of heavy metal loss in mining area, this paper investigated the main ways of heavy metal loss, built the diffusion model of its non-steady-state and uniform loss, and solved the model by integration, a time-varying function on the path of heavy metal loss which diffused into soil and runoff waters in the mine area was acquired, and a method of efficient prevention and cure was obtained. The results shows that the continuous existence of heavy metal in the mining area will aggravate and increase the regional pollution of soil and runoff waters, among them, the diffusion speed of heavy metal loss dissolved into runoff waters due to soil erosion in mining area will be faster and the hazard will be lager, there exists a high pollution concentration in the estuarine of new waters which the runoff flowed into. The effective recovery of heavy metal residue and waste liquid in mining area, and the decrease of discharge concentration is the important ways to effectively reduce the improvement costs of heavy metal pollution area and improve the harnessing effect, if further combing the restorations of engineering plants and bacteria improvement for heavy metal polluted area, which would be more efficient and rapid, and suitable for research and spread.