Distribution characteristics and source analysis of polycyclic aromatic hydrocarbons phenantrene in abandoned coal mine water

In order to identify the source of high levels of polycyclic aromatic hydrocarbons phenanthrene in abandoned mine water,the distribution characteristics of phenanthrene in abandoned coal mine water were statistically analyzed based on 16 different types of water samples collected and analyzed in the Fengfeng Mining Area.Furtherly,environmental isotope and chemical composition correlation with containing PAHs phenanthrene value was applied to analyze the source of pollution.The results showed that the phenantrene concentration in abandoned mine water was ranged from 0.10 to 0.30 ng/L with an average of 0.21 ng/L.The concentration of phenanthrene in different water was expressed as surface water > abandoned mine water>coal bedrock water≥shallow groundwater≥karst groundwater.The source of abandoned mine water was karst groundwater,and intense water-rock interaction happened with the groundwater level rise.The consequence was abandoned mine water dissolved more silicate minerals and sulfide minerals with lower 34S,and then the phenanthrene content of PAHs is higher than that of other water bodies.