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利用三维荧光光谱、DOC和无机阴离子等指标,研究了桌子山奥灰水中DOM的分布特征.结果表明:DOC和UV_(254)与地下水补径排密切相关,距补给区较近的平沟矿奥灰水DOC和UV_(254)较高,下游的骆驼山矿则明显降低;新的补给水源使利民矿DOC浓度略有增加,之后在利民-棋盘井地区成衰减趋势.奥灰水中DOM出现了4个荧光峰,平沟-骆驼山地区和利民-棋盘井地区peakⅡ和PeakⅣ荧光峰强度均成U型变化,PeakⅢ均逐渐衰减至荧光峰消失;反硝化反应和微生物作用是各荧光峰变化的主要因素.整个研究区内DOC和UV_(254)与各荧光峰强度的相关性低,表明奥灰水中荧光性有机质的比例不高,奥灰水中荧光性有机质具有相对独立性.因此可以根据DOM含量和荧光性确定奥灰水的水化学变化特征.
The distribution characteristics of DOM in Table Mountain Ordovician gray water were studied by using three-dimensional fluorescence spectroscopy, DOC and inorganic anions, etc. The results showed that DOC and UV 254 were closely related to the groundwater recharge row, DOC and UV 254 in the gray water were higher, and the lower camel shanxi decreased obviously. The new recharge water increased the concentration of DOC in Limin and then decreased in the Limin-Qipanjing area. DOM Four fluorescence peaks appeared. The peak intensities of peak Ⅱ and Peak Ⅳ in Pinggou-Camel Mountain area and Limin-Qipanjing area all changed into U-shape, Peak Ⅲ gradually decreased to disappear and the fluorescence peak disappeared. The denitrification reaction and microorganisms were fluorescence The main factors of peak variation were the low correlation between DOC and UV_ (254) and the intensities of fluorescence peaks in the entire study area, indicating that the proportion of fluorescent organic matter in Ordovician gray water was not high and the fluorescence organic matter in Ordovician gray water was relatively independent. The water chemistry characteristics of Ordovician can be determined according to DOM content and fluorescence.