不同地质年代煤矸石中有机质的溶出特征对比

分别以神东矿区补连塔矿侏罗纪煤矸石和保德矿二叠纪煤矸石为研究对象，通过浸泡实验，结合三维荧光光谱测试技术及平行因子分析法，对比研究2种煤矸石中有机质的溶出特征，这对于开展煤矿区地下水库水处理机理研究具有重要意义。研究结果表明：由于煤矸石自身矿物组成不同，补连塔矿煤矸石浸泡液中总离子质量浓度高于保德矿，且2种煤矸石浸泡液均呈弱碱性；其中补连塔矿煤矸石溶解性有机质（DOM）中含有较多的共轭双键或苯环类简单芳香族化合物，以富里酸和分子量较大的陆源类腐殖质为主，且含量普遍高于保德矿，而保德矿煤矸石中富里酸和酪氨酸类有机质较多。根据DOM样品荧光指数（FI）、生物源指数（BIX）、腐殖化指数（HIX）的计算结果，2种煤矸石中DOM主要为内源有机质，并具有较强的自生源特征，且煤矸石形成地质年代越早，煤矸石DOM样品的

Comparison of dissolution characteristics of organic matter in coal gangue of different geological time

Taken the unweathered coal gangues obtained from the Jurassic coalbed of Bulianta mine and the Car-boniferous-Permian coalbed of Baode mine located in Shendong mining area as the research subjects, the dissolution characteristics of organic matter in two kinds of coal gangues were studied comparatively through soaking experiments, and combined with three-dimensional fluorescence spectrometry and parallel factor analysis. It is significant for the underground reservoir to study mechanism of water treatment in coal mining areas. These results indicate that the total ion concentration in DOM sample of coal gangue of Bulianta mine is higher than that of Baode mine due to the different mineral constituents, and the two kind of DOM samples of coal gangue are all weakly alkaline. Among them, the DOM of Bulianta mine contains more conjugated double bonds or benzene ring simple aromatic compounds, more fulvic acid and the terrestrial humus with larger molecular weight, and the content of DOM is generally higher than that of Baode mine. But the fulvic acid and tyrosine organic matter content in Baode mine coal gangue are relatively high. According to the calculation results of FI, BIX and HIX indices of DOM samples, the DOM in two kinds of coal gangues is mainly endogenous organic matter, and it has strong spontaneous source characteristics. The earlier the geological time of coal gangue formation is, the more obvious the "microorganism source" feature of coal gangue of DOM samples are.