中文关键词重工业城市岩溶地下水系统多环芳烃时空变化来源 英文关键词strongly industrial citykarstgroundwater systempolycyclic aromatic hydrocarbons (PAHs)temporal and spatial variationsource

作者	单位	E-mail
苗迎	中国地质科学院岩溶地质研究所, 自然资源部/广西壮族自治区岩溶动力学重点实验室, 桂林 541004	miaoying.1988@karst.ac.cn
孔祥胜	中国地质科学院岩溶地质研究所, 自然资源部/广西壮族自治区岩溶动力学重点实验室, 桂林 541004
李成展	中国地质科学院岩溶地质研究所, 自然资源部/广西壮族自治区岩溶动力学重点实验室, 桂林 541004	lchzhan@karst.ac.cn

中文摘要 为了确定岩溶区重工业城市地下水中多环芳烃的时空变化特征以及来源，采集柳州市丰枯水期23个地下水样品，利用16种多环芳烃的成分谱，结合其物理化学性质以及柳州市具体情况，分析多环芳烃在柳州市地下水系统中的变化及来源.结果表明：①柳州市丰水期地下水中∑PAHs平均浓度柳北区 > 柳东区 > 柳西区 > 鸡喇地下河，且PAHs浓度所占比重均随分子量的增大而减小；枯水期鸡喇地下河 > 柳北区 > 柳西区 > 柳东区，且4环PAHs浓度所占比重均为最高，5~6环次之.②柳州市枯水期地下水PAHs呈现较高污染水平，丰水期污染水平较低；③化石燃料等有机物高温燃烧为PAHs主要来源，主要由工业过程、交通运输、取暖做饭等人类活动产生. 英文摘要 To understand the spatiotemporal variation characteristics and sources of polycyclic aromatic hydrocarbons in karst groundwater in a strongly industrial city, the authors collected 23 groundwater samples in the water and dry period in Liuzhou using component spectra of 16 types of polycyclic aromatic hydrocarbons in combination with the physical and chemical properties and analyzed the spatiotemporal variation characteristics and sources of the polycyclic aromatic hydrocarbons (PAHs) in karst groundwater in heavy industrial city. The results show that the average concentration of ∑PAHs in the groundwater in the wet period has an order of Liubei District > Liudong District > Liuxi District > Jila Underground River and the concentration proportion of PAHs decreases with the increase of the molecular weight, while the order in the dry period is Jila Underground River > Liubei District > Liuxi District > Liudong District. The PAHs in the groundwater during the dry season have a high pollution level, while a low pollution level is observed in the wet season. The main sources of PAHs are organic matter burns at high temperature such as fossil fuel, which are produced by human activities such as industrial processes, transportation, heating, and cooking.

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