Key Laboratory of Mine Geological Hazards Mechanism and Control, Xi'an, 710054, People's Republic of China.
North China Institute of Science and Technology, Xueyuan Street 467, Sanhe, 065201, Hebei, People's Republic of China.
Environ Monit Assess. 2018 Nov 7;190(12):701. doi: 10.1007/s10661-018-7074-8.
In this study, we collected a total of 15 Ordovician limestone (OL) water, 4 shallow groundwater, 3 mine water, 2 surface water, and 2 coal bedrock water samples, aiming to analyze the characteristics of distributions and sources of polycyclic aromatic hydrocarbons (PAHs) in OL water in a typical exploited coal mine named as Fengfeng mining area. Firstly, the PAHs behaviors and characteristics in different types of water of the mining area were investigated and summarized. And then, the hydrogen and oxygen isotopes were combined with isomer ratio method to determine the characteristics, sources, and behaviors of PAHs in OL water, respectively. Results showed that the concentration of PAHs ranged from 0.06 to 0.56 ng/L in OL water of Fengfeng Mine. Among them, the dominant 2-4 cyclic PAHs, including Nap, Phe, Flt, and Flu, were detected at a low concentration level with high detection rate. Characteristic compound ratios Ant/(Ant + Phe) and Flt/(Flt + Pyr) showed that the PAHs were derived from the combustion of the coal and biomass. The results of δD/δO and δD/Phe testing showed that the PAHs in most OL water came from rainfall infiltration recharge with coal and biomass combustion products in exposed bedrock area at high altitude. The PAHs of some polluted areas were derived from leakage recharge of shallow groundwater, mine water, and coal bedrock water.
本研究共采集了 15 个奥陶纪灰岩（OL）水样、4 个浅层地下水样、3 个矿水样、2 个地表水样和 2 个煤基岩样，旨在分析典型采煤区——峰峰矿区 OL 水中多环芳烃（PAHs）的分布特征和来源。首先，研究了矿区不同类型水中 PAHs 的行为和特征。然后，结合氢氧同位素和异构体比值法，分别确定了 OL 水中 PAHs 的特征、来源和行为。结果表明，峰峰矿区 OL 水中的 PAHs 浓度范围为 0.06-0.56ng/L。其中，Nap、Phe、Flt 和 Flu 等低浓度、高检出率的 2-4 环 PAHs 为优势组分。特征化合物比值 Ant/(Ant+Phe)和 Flt/(Flt+Pyr)表明，PAHs 来源于煤和生物质的燃烧。δD/δO 和 δD/Phe 的测试结果表明，大多数 OL 水中的 PAHs 来自于降雨入渗补给，补给源为高海拔露头基岩区的煤和生物质燃烧产物。一些污染区的 PAHs 则来源于浅层地下水、矿水和煤基岩水的渗漏补给。
