Abstract
To study the release law of waste pollutant comprehensively and systematically, and analyze transporting law ofpollutant and predict its distribution scientifically, the main pollutants of waste leachate were studies, includingthe release mechanism of COD, Cl-, SO42-, and total hardness, etc. by the dynamic dissolution experiment,according to the practical rainfall of Fuxin city. The results showed that Cl- and COD have the most fast andslow transporting speed. The simulation was carried out by combining the COD decreasing curve fittingequations, which was considered as source sink term, and the established underground water dissolutiontransporting mathematical model. The result showed that, in the center of landfill, the simulated curve is accordwith the COD experiment curve, and the result faithfully reflects the transporting law of pollutants. The modelcan provide the theoretical basis for the prediction of pollution of underground water by waste pollutant and itsprevention and control.
Highlights
As a potential pollutant source, the landfill site is very different from other underground water pollutant sources
The concentration of leachate elements changing with time, to predict the changing law of leachate pollutant concentration correctly, the experiment studied the organic pollutant elements and the process and law of its concentration change, using the waste of Fuxin Gong Guan Landfill Site, and taking tap water to simulate extraneous rainfall
(2) Leaching: To simulate practical rainfall, tap water is used to leache on the waste column evenly
Summary
As a potential pollutant source, the landfill site is very different from other underground water pollutant sources. There are a series of physical, chemical and biological reactions between wastes and its surrounding, because of leaching by rain or surface water. Landfill leachate is produced, whose elements are complicated and pollution concentration is high. With the leaching of extraneous water on it, the concentration of elements of landfill leachate is changing. The production of landfill leachate changes all the way. It is very difficult to design the landfill site and control its pollution (Zhao, 2002, pp.).Confirmation of landfill leachate water quality is the key point and basis of leachate treatment design, and it is the basis of pollutant prediction and control
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