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

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.