Research On The Environmental Impact Assessment Of Groundwater In The Leather Industrial Park

Groundwater is used as an important source of industrial,agriculture and urban life.Once groundwater was contaminated due to its hidden,it would be difficult to recover by itself and may cause immediate harm to human activities.There are many kinds of materials used in the leather industry.The production process is complicated,and pollutants are diverse.Therefore,the leather industrial park is especially important for controlling pollution of the groundwater environment.Some evaluation factors that pollutant emissions are less but have a great influence were considered in the groundwater planning environmental assessment of the leather industrial park.Environmental impact on groundwater were analyzed,especially in the low-lying wetland plain and the conditions that the surface water is closely related to the groundwater recharge.Pollutants impact on groundwater quality were identified through the production and processing,storage and transportation engineering,sewage treatment three aspects in the leather industrial park.According to the pollutant biodegradation,adsorption,mobility,and the extent of the impact,sulfide,NH3-N,nitrate,SO42-,chloride conventional evaluation factors were identified by matrix method,tetrachloroethylene was added.According to the characteristics of the low-lying plains of wetland type,fluoride was identified.Finally,it is to verify the supplementary evaluation factors compared with conventional evaluating groundwater status evaluation factor analysis with the improved Nemerow index method through the case,The results show that water quality evaluation category that the new added is more accurate than evaluation category of evaluation factors.Then the groundwater environmental impact prediction comparison analysis for tetrachloroethylene and features factor Cr6+.The diffusion range of tetrachloroethylene is larger than Cr6+.In the groundwater PEIA of the leather industry park,it is necessary that tetrachloroethylene is added to the evaluation factors,so as to improve the evaluation of groundwater environmental impact assessment factors system,and it can more accurately evaluate groundwater PEIA for leather industrial park.