Investigation And Evaluation Of Groundwater Pollution In A Coking Plant In Xingtai,Hebei Province

Groundwater buried below the surface,because of the quality of water is widely used in life,agricultural irrigation,industrial production,and is closely related to our life and health.In recent years,with the rapid development of China's social economy and the improvement of the quality of life,a series of environmental negative effects have become increasingly serious,especially the problem of groundwater pollution.For example,the non-standard treatment and discharge of municipal garbage and industrial waste water will lead to the decrease of groundwater quality,and because groundwater has certain concealment,it is very difficult to control.Therefore,it is of great practical significance to investigate and evaluate the groundwater to find out the pollution sources in time and to regulate and control the pollution before it causes serious pollution,which is conducive to the sustainable development of the groundwater environment.In this paper selected the hebei province xingtai a coking plant is not in the study area,combined with a large amount of hydrogeological data,on the basis of comprehensive study area,analyzing the present situation and problems of development and utilization of groundwater near around in the coking plant of groundwater were arranged reasonably selecting the position 20 and 29 measures of common pollution,according to the test data,using comprehensive evaluation method and individual components evaluation method of target coking plant in the area of groundwater environment quality evaluation,the main draw the following conclusion:(1)95% of monitoring well to detect the different pollution factor,detected out of 11 beyond groundwater pollution factor ? class standard,there are three place in 20 Wells more overweight pollutant monitoring well,standard components at nine.(2)in order to further analyze the pollution degree of groundwater in the study area and identify the specific pollution sources,this paper evaluated the pollution index method,and found that there were five kinds of pollutants in the shallow groundwater: cyanide,volatile phenols,benzo [a] pyrene,polycyclic aromatic hydrocarbons and petroleum.Combined with the analysis of the field data of the coke plant in the research area,it is determined that the phase ii(# 4 coke oven,# 5 coke oven)and phase iii(# 6coke oven,# 7 coke oven)projects are the most likely sources of the five pollutants.(3)in this paper,using the Visual Modflow to research in the area around the coking plant of groundwater pollutant migration law of numerical simulation analysis,establish a concept model to forecast the cyanide pollution plume diffusion trend,it is concluded that the groundwater in the study area of cyanide pollution range will be increasing along withthe time,2920 day cyanide migration when the maximum distance of 1500 m,the pollution center concentration at 5 mg/L,for the influence of groundwater is 1.62 km2.(4)according to the evaluation results of groundwater pollution near the coking plant in the study area,specific prevention and control measures for groundwater pollution in this area were formulated,which provided theoretical basis for the pollution control,rational development and utilization of groundwater resources in this area.