利用三维荧光光谱判别煤矿区含水层水力联系
Distinguishing Hydraulic Connection of Coal Mine Aquifers by Three-dimensional Excitation-emission Matrix
-
摘要: 为了弄清陕北某矿上下含水层是否存在水力联系，利用三维荧光光谱研究了溶解性有机质（DOM）荧光特征，结果表明：各含水层之间DOM荧光指纹差异较显著，浅部微生物活动强烈，Ⅱ区和Ⅳ区荧光峰较强；深部微生物活动趋于稳定，Ⅱ区和Ⅳ区荧光峰较弱；第四系水中存在Ⅲ区荧光峰，直罗组下段的Ⅴ区荧光峰较强。ZLG-8孔水中Ⅱ区荧光强度偏低，Ⅳ区未出现荧光峰，表明该层水中微生物新陈代谢极不活跃，属于深部地下水环境；以Ⅴ区荧光峰强度作为特征值，与直罗组下段含水层中DOM荧光特征相同。综合分析确定ZLG-8孔水来自直罗组下段含水层，与上部含水层没有直接的水力联系。
-
关键词:
- 溶解性有机质（DOM） /
- 水力联系 /
- 三维荧光光谱（3DEEM） /
- 煤矿水 /
- 水文孔
Abstract: In order to make clear the hydraulic connection between upper and lower aquifers, three-dimensional excitation-emission matrix (3DEEM) was used to research fluorescent characteristics of dissolved organic matter (DOM) in each aquifer. The results showed that there were significant differences of fluorescent characteristics in each aquifer. Due to intense microbial activity in shallow part, the fluorescence intensity (FI) in region Ⅱ and region Ⅳ was high. When deep microbial activity tends to be stable, FI was very low in regionⅡand region Ⅳ. We could detect fulvic acid-like (region Ⅲ) in Quaternary aquifer, and FI of humic acid-like (region Ⅴ) was high in the lower member of Zhiluo formation. In the water sample of ZLG-8 hole, FI of aromatic protein Ⅱ was low, and soluble microbial by-product-like was not detected. These reflect deep groundwater condition and inactivity of microbe. There were same fluorescent characteristics in region Ⅴ between ZLG-8 hole and the lower member of Zhiluo formation. Overall, above analysis could make clear that groundwater of ZLG-8 hole was from the lower member of Zhiluo formation, and no direct hydraulic connection with upper aquifers. -
-
[1] 比契叶娃 K E. 水文地球化学-地下水化学成分的形成[M].彭立祖,译.北京:地质出版社,1981:52-53. [2] Guo H M, Yang S Z, Tang X H, et al. Groundwater geochemistry and its implications for arsenic mobilization in shallow aquifers of the Hetao Basin, Inner Mongolia[J].Science of the Total Environment, 2008, 393: 131-144. [3] 高宗军,张福存,安永会,等.山东高密高氟地下水成因模式与原位驱氟设想[J].地学前缘,2014,21(4):50-58. [4] Roesler A，Gammons C H，Druschel G K，et al. Geochemistry of flooded underground mine workings influenced by bacterial sulfate reduction[J].Aquatic Geochemistry, 2007, 13( 3): 211-235. [5] 杨建.桌子山矿区地下水中溶解性有机质荧光特征分析[J].煤矿安全,2014,45(2):131-137. [6] Baker A, Ward D, Lieten S H, et al. Measurement of protein-like fluorescence in river and wastewater using a handheld spectrophotometer[J].Water Research, 2004,38(12): 2934-2938. [7] 杨建.基于溶解性有机质荧光光谱特征的突水水源识别[J].煤炭科学技术,2013,41(6):100-103. [8] McKnight D M, Boyer E W, Westerhoff P K, et al. Spectrofluorometric characterization of dissolved organic matter for indication of precursor organic materials and aromaticity[J].Limnology and Oceanography, 2001, 46(1): 38-48.
计量
- 文章访问数: 420
- HTML全文浏览量: 0
- PDF下载量: 0
下载:
