桌子山矿区地下水中溶解性有机质荧光特征分析  

The Fluorescence Properties of Dissolved Organic Matter in Zhuozishan Mine Groundwater

作　　者：杨建 

机构地区：[1]中国煤炭科工集团西安研究院有限公司,陕西西安710054

出　　处：《煤矿安全》2014年第2期131-134,137,共5页Safety in Coal Mines

基　　金："十二五"国家科技支撑计划资助项目(2012BAC10B03);中煤科工集团西安研究院创新基金资助项目(2013XAYCX010)

摘　　要：利用三维荧光光谱对桌子山矿区地下水中溶解性有机质荧光特性进行了研究，结果表明：桌子山矿区地表水和地下水中溶解性有机质主要为生物源（f450/500〉1．89）；上覆水体（包括地表水和第四系水）中TOC和uV2，4值分别为0．67～0．69mg／L和0．018～0．022cm-1，明显高于砂岩水的0．24～0．62mg／L（TOC）和0～0．019cm-1（UV254），以及奥灰水中的0．22～0．35mg／L（TOC）和0．001～0．006cm-1（UV254）。上覆水体中DOM荧光光谱出现了5个指纹荧光峰，RegionⅡ～RegionⅣ荧光强度均较明显；随着地层层位的加深，荧光峰和荧光强度呈递减趋势，砂岩水中出现了RegionⅠ、RegionⅡ和RegionⅣ的荧光峰，RegionⅠ和RegionⅡ荧光强度也比上覆水体高；奥灰水中则以RegionⅡ和RegionⅣ荧光峰为主，且荧光强度高于砂岩水。砂岩水和奥灰水中RegionⅡ荧光强度与TOC浓度成负相关，RegionⅣ荧光强度不仅与TOC浓度成正相关，还随着RegionⅡ荧光强度的增加而增加。利用三维荧光光谱能够区分出上覆水体、砂岩水和奥灰水之间的荧光特征差异，为煤矿突水水源识别提供技术支持。Three- dimensional excitation -emission matrix fluorescence spectroscopy （3DEEM） was applied to measure the fluores- cence properties of natural organic matter in Zhuozishan Mine groundwater. The results showed that DOM was biological source in Zhuozishan Mine surface water and groundwater （f450/500 〉 1.89）. The detection values of TOC and UV254 were 0.67 - 0.69 mg/L and 0.018- 0. 022 cm- 1 respectively in overlying water （including surface water and quaternary water）, and the values were higher than that in sandstone water （ TOC = 0.24 - 0.62 mg/L and UV254 = 0 -0. 019 cm - 1 ） and Ordovician limestone water （ TOC = 0.22 - 0.35 mg/L and UV2s4 = 0. 001 -0. 006 cm-l ）. There were 5 fluorescence peaks of DOM in overlying water, and the fluorescence intensities （FI） of Region lI , Region m and Regionlgwere obvious. The deeper of aquifers, the fewer of quantities and intensities of fluorescence peaks decreased. There were three fluorescence peaks, and the FIs of Region I and RegionⅡ were higher than that in overlying water. The mainly fluorescence peaks were Region Ⅱ and Regionlg, and the FIs were higher than that in sandstone water. There was a nega- tive correlativity between the FIs of Region Ⅱ and TOC, but the FIs of RegionlV was positively associated with TOC and the FIs of Re- gion Ⅱ. 3DEEM could be used to differentiate the fluorescence properties of DOM in each aquifer, and the results could be used for the discrimination of water bursting source.

关 键 词：溶解性有机质 三维荧光光谱 荧光特征 地下水 突水 水源识别 防治水 

分 类 号：TD741[矿业工程—矿井通风与安全]