The on-the-spot investigations and experiments show that the soil in the investigated area is comparatively strong in maintaining the metals such as Hg, Cd, Cu etc.The transporting capability of the heavy metals is comparatively poor. The transport distributes mainly on the surface of the soil and has a horizontal diffusion in a small range. But, the As'transporting capability in the shape of an ion is comparatively strong.On certain condition, the soil limits the accumulation of the heavy metals. The limit...