Pollutant Release Of Sancha Of Lake Mud

Lake sediment is an important factor in water environmental pollution.It is also a worldwide environmental problem. Domestic and foreign research results showed that after the exogenous pollutants under control wuhich impacts water quality, sediment as a source of pollutants within the affected water quality has become a major source of pollution. On the basis of reference work this study used PVC column simulates the release conditions of sediment, at the same time this experiment is used to study under natural conditions the release of sediment pollutants diffuse to overlying water. This experimental also has some theoretical significance of research for understanding the laws of the release in the sediment to overlying waterChinese and foreign scholars started to reseach the law of pollutants release from the last century, after continuous development, many of the results has been obtained, however, because of the complexity of pollutants in sediments release to overlying water, the diversity of factors, there are still many questions unanswered. Previous studies focused on the overlying water research on the pollutant concentration. But sediment overlying water and the release rate of the release of the total is still less. In this paper, based on previous studies, studied the overlying sediment pollutants diffusion to water.The main contents are as follows:(1) This paper has analysised the characteristics of the recent pollutions of Sancha Lake. Through quantitative analysis, Recent pollution sources of Sancha Lake are:sewage, public fertilizer,pesticides,surface runoff,precipitation,and fish cage culture and the undigested manure from the bait. Since the bait which the fish cage culture and the undigested manure as the main sources of pollution, and this pollutants will be a tremendous impact lake sediments, and continued to affect lake water quality.(2) The static simulation is using water of Sancha Lake and distilled water as the overlying water to discuss release of contaminants of sediment. Then we have found that both the overlying water, contaminants are rapidly released in the early experiments. The main reason of its release in the water-cement interface concentration difference; After the experiment into late the various types of pollutants released in the different laws, temperature, dissolved oxygen, sediment characteristics and laws of pH will affect the release.(3) This paper also has studied the total amount of sediment release and the further release rate. Consider the total amount of each sample on the effect of the release, then calculated variation of the total release and the release rate. The variation found in the overlying water concentration with basically the same.