Chloride Ion in Groundwater near Disposal of Solid Wastes in Landfills

Abstract

To study the influence of leachate plume from sanitary landfills on groundwater, the concentration of chloride ion in the groundwater, soil water, and river water are observed because chloride ion is nonreactive and not sorptive and has no redox or precipitation. The experimental result indicates the flow process of the leachate plume near the landfills; that is, most of the leachate plume is discharged into a river, and the remainder infiltrates into the ground, especially through the weathered geological layer. Although small values of saturated hydraulic conductivity in the geological layer near the landfills hold back the leachate plume of chloride ion from the two sources, this study also notes the existence of two sources of chloride ion near the landfills: one is the rice field, and the other is the landfills themselves.