Pollution Factor And Remediation Technology Screening Of Mine Groundwater In Sichuan

Sichuan province is very rich in mineral resources,mining has been an important pillar industry of the economic development in Sichuan province. Due to the insufficient level of mining technique in history, the mine groundwater pollution caused by mining activities is become environmental problems, which has become the main causes of groundwater pollution in Sichuan province. Based on previous research and combined with the actual investigation, this thesis analysis the distribution in mines of Sichuan province; With four typical mine as an example, through the analysis of the mineral composition, toxic extraction test, groundwater quality sampling analysis to identify typical mining groundwater pollution factor in Sichuan province; And on the basis of results of pollution factor, we studied the remediation technology screening. In order to obtain a certain theoretical significance to guide the future mining groundwater pollution repair engineering practice of Sichuan province. Besides, this study provides Sichuan province for a repairing reference which is suitable for mining groundwater pollution. The following parts are the main understanding and achievement.(1) The coal mines mainly distributes in the basin area and Southern Sichuan area; Ferrous metal are mainly in Pan-xi Region, South Sichuan area and Northeast Sichuan area; Non-ferrous metal mine are mainly distributed in the western Sichuan plateau region; Non-metallic mineral mainly locates in the Chengdu plain area.(2) The study of mining groundwater pollution factor shows that coal mining groundwater pollution factor is the acid wastewater and heavy metal pollution of Fe produced by the mine and gangue; Ferrous and non-ferrous metal groundwater pollution factors is acidic waste, heavy metal ions and mineral processing reagents produced by the waste rock and tailings. Two types difference between heavy metal ions, ferrous metal mainly Ti, Fe, Ni, As. non-ferrous metals with Cu, Pb, Zn, As. Non-metallic mineral groundwater pollution factor for fluorine pollution primarily.(3) The basic choosing principle put forward is the feasibility of technology, rationality of economic, non- polluting environment. According to the selective principles we take it into action. It is concluded that the order of Coal mine groundwater pollution remediation technologies is Permeable reactive barrier, Pump and treat method, Bioremediation, Monitoring natural attenuation, Phytoremediation, In-situ chemical reduction. Ferrous metal groundwater pollution remediation technologies is Pump and treat method, Permeable reactive barrier, Bioremediation, Monitoring natural attenuation, Phytoremediation, In-situ chemical reduction technology; Non-ferrous metal groundwater remediation technologies in order to Pump and treat method, Permeable reactive barrier, Bioremediation, Monitoring natural attenuation, Phytoremediation, In-situ chemical reduction. Non-metallic mineral groundwater pollution remediation technologies in the order for Permeable reactive barrier, Electroremediation technique, Pump and treat method, Monitoring natural attenuation, Phytoremediation, In-situ chemical reduction.