Hydrogeochemical Mechanism of the Petroleum Hydrocarbon Pollution in Karst Fissure Groundwater System

The research of hydrogeochemical mechanism of petroleum hydrocarbon in karst fissure groundwater system is important to predict the trend of petroleum hydrocarbons and the change of groundwater environment. We take the karst fissure water system as the research object, where there is a refinery. The variation of SO42-, HCO3-, NO3-, NO2-, HS- can be used as a hydrogeochemical sign of petroleum hydrocarbon pollution by analyzing the change of water quality parameters before and after karst fissure water contaminated by petroleum hydrocarbon. It has been also analyzed systematically that hydrogeochemical mechanism including desulfurization, denigration and ion exchange happen during the pollution process in the karst fissure water system. It is pointed out that the human activities have a great impact on the groundwater and changes of environment.