Study On The Groundwater Pollution Law Of The Contaminated Site Of Yunnan Mengzi Nitrogen Fertilizer Plant

In this paper,the groundwater pollution law of the Quaternary loose layer of the contaminated site of Mengzi Nitrogen Fertilizer Plant is taken as the research goal.Firstly,through a large number of sample collection and analysis,the characteristics of groundwater pollution in the plant area are identified,and the pollution source of the plant area is analyzed.Then combined with the field geological survey and hydrology Geological tests,etc,by using GMS software to simulate and verify the pollution source of the plant area;finally,based on the verified solute transport model analysis,the pollution law of groundwater in the contaminated site is studied.Mainly got the following conclusions:In recent years,with the rapid development of society and economy and the continuous advancement of urbanization,the problem of groundwater environmental pollution has become increasingly serious,which seriously threatens the physical and mental health of human beings and restricts the development of society.The main source of groundwater pollution is caused by industrial pollution.Industrial pollution sources have significant characteristics such as large emissions,wide pollution range and difficult to handle.Groundwater pollution research and treatment are urgent.In this paper,the contaminated groundwater in Mengzi Nitrogen Fertilizer Plant is taken as the research object,and the migration law of typical pollutants in Mengzi Nitrogen Fertilizer Plant in loose groundwater is simulated.This provides a scientific basis for the prevention and control of groundwater pollution.In this paper,the groundwater pollution law of the Quaternary loose layer in the contaminated site of Mengzi Nitrogen Fertilizer Plant is taken as the research target.Firstly,through a large number of sample collection and analysis,the groundwater pollution characteristics of the plant block are identified,and the pollution source of the plant area is analyzed.Then combined with the field geological survey.And hydrogeological tests,etc.,identified the hydrogeological conditions of the study area and the nitrogen fertilizer plant area,established the groundwater flow field of the plant block with GMS software,and simulated and verified the pollution source of the plant area;finally,the verified solute transport model analysis The pollution of typical pollutants(ammonia nitrogen and manganese)in the contaminated site of nitrogenous fertilizer plants in loose groundwater was studied.The results show that the pollutants migrate slowly in the weakly permeable layer of superficial silty clay.The diffusion of pollutants is mainly vertical,and the concentration of pollutants has obvious influence on the diffusion rate.The higher the concentration of pollutants,the faster the diffusion rate.Upward,the rate of pollutant diffusion is also related to the pollutant carrier.The continuous leakage of wastewater is faster than that of the rainfall infiltration method.After the pollutant enters the deep layer of fine sand bearing aquifer,the pollutant accelerates to the hydraulic gradient.The migration in the lower direction,and the migration speed shows a uniform diffusion trend.