煤矿地下水库DOM来源解析

Analysis of the source of DOM in underground reservoir of coal mine

为深入了解溶解性有机物(DOM)在煤矿地下水库水环境中的变化过程,本研究利用三维荧光光谱(EEMs)结合平行因子分析(PARAFAC)模型,分析了大柳塔煤矿地下水库进出水中DOM组分的变化情况,并利用主成分分析法对影响水体DOM的主要因素进行了研究。研究结果表明,煤矿地下水库有一定的净化作用,表征DOM的TOC和UV 254在出水处有明显降低;地下水库水体中DOM可分为紫外区类富里酸(240 nm/380 nm)、类蛋白色氨酸(275 nm/330 nm)、紫外区类富里酸(255 nm/380 nm)、可见类富里酸(265 nm,355 nm/380 nm)4个组分;通过主成分分析以及对f 470/520、HIX、BIX 3个参数的分析,结果表明DOM的来源表现为内源输入与陆源输入共同作用,但以内源输入为主的特点,在地下水库的运行管理过程中应重点考虑内源污染的治理。

For an in-depth understanding of the change process of dissolved organic matter(DOM)in water environment of coal mine underground reservoir,this study used the three dimensional fluorescence spectrum(EEMs),combined with PARAFAC model,to analyze changes and components of the DOM in inflows and outflows in Daliuta coal mine underground reservoir.The principal component analysis(pca)was used to analyze the main factors by which the water body of the DOM was influenced.The results showed that the coal mine underground reservoir had a certain purification effect,and the TOC and UV 254 of DOM were significantly reduced at the outlet water.The DOM in the water body of underground reservoir can be divided into four components:uv-like fulvic acid(240 nm/380 nm),protein-like tryptophan(275 nm/330 nm),uv-like fulvic acid(255 nm/380 nm)and visible fulvic acid(265 nm,355 nm/380 nm).Through principal component analysis and the analysis of f 470/520,HIX and BIX,the results showed that the source of DOM was a combination of endogenous input and terrestrial input,but with endogenous input as the main feature.The treatment of endogenous pollution should be considered in the operation and management of underground reservoirs.