Environmental Quality Investigation And Ecological Risk Of The Historical Hazardous Waste-Waste Oil Sludge Disposal Disposal Place In Yuhang

Law on the Prevention and Control of Environmental Pollution by Solid Wastes Of the People' s Republic of China was enacted on April 1st, 1996, the publication of the law ends the situation that prevention of solid waste pollution in our China has no relative laws and regulations to depend on and greatly improved the situation of solid waste prevention work. However, before the enact of the law, the disposal of solid waste, especially hazardous solid waste doesn't get enough attraction, the disposal manners of these hazardous waste were mostly landfill without pollution prevention efforts and left lots of environmental security threat affecting health of the people around in various ways. Waste oil sludge mainly refers to asphaltenes produced in the oil refining, including PAHs, Alkanes, Benzol compounds etc and is a kind of hazardous waste existing produced in huge mount in our country. Enforcing the environmental quality assessment of the waste oil sludge disposal places can provide reference for the pollution control of the disposal place as well as instruction for the remediation of the polluted environment. And it is of great theoretical and practical meaning for the pollution control of the similar polluted environment.In this paper we evaluate the environmental quality of the soil around waste oil sludge disposal place in Yuhang town by using different indexes including pollutants' concentration, soil enzyme activity and microbe community biodiversity on the basis of learning about pollution history and basic characters of the soil, also we evaluate the ecological risk by toxicological method to evaluate it's ecotoxicity. And at last we get the results as follows:1. Soil pH as well as water pH around the disposal place drops obviously, the closer it is to the disposal place, the more it is dropped. According to the distances from the disposal place, we set the environment around into four different areas for our further analysis.2. Determination of organic pollutants of the soil samples reveals that pollutants in the soil samples mainly includes alkanes ranging from C13 to C39,...