Key Laboratory of Water Cycle & Related Land Surface Processes, Institute of Geographic Sciences and Natural Resources Research, Chinese Academy of Sciences, Beijing 100101, China.
Environ Monit Assess. 2013 Apr;185(4):3413-44. doi: 10.1007/s10661-012-2801-z. Epub 2012 Aug 8.
This paper investigates the organic pollution status of shallow aquifer sediments and groundwater around Zhoukou landfill. Chlorinated aliphatic hydrocarbons, monocylic aromatic hydrocarbons, halogenated aromatic hydrocarbons, organochlorine pesticides and other pesticides, and polycyclic aromatic hydrocarbons (PAHs) have been detected in some water samples. Among the detected eleven PAHs, phenanthrene, fluorine, and fluoranthene are the three dominant in most of the groundwater samples. Analysis of groundwater samples around the landfill revealed concentrations of PAHs ranging from not detected to 2.19 μg/L. The results show that sediments below the waste dump were low in pollution, and the shallow aquifer, at a depth of 18-30 m, was heavily contaminated, particularly during the wet season. An oval-shaped pollution halo has formed, spanning 3 km from west to east and 2 km from south to north, and mainly occurs in groundwater depths of 2-4 m. For PAH source identification, both diagnostic ratios of selected PAHs and principal component analysis were studied, suggesting mixed sources of pyro- and petrogenic derived PAHs in the Zhoukou landfill. Groundwater table fluctuations play an important role in the distribution of organic pollutants within the shallow aquifer. A conceptual model of leachate migration in the Quaternary aquifers surrounding the Zhoukou landfill has been developed to describe the contamination processes based on the major contaminant (PAHs). The groundwater zone contaminated by leachate has been identified surrounding the landfill.
本文研究了周口垃圾填埋场周围浅层含水层沉积物和地下水的有机污染状况。在一些水样中检测到了氯代脂肪烃、单环芳烃、卤代芳烃、有机氯农药和其他农药以及多环芳烃(PAHs)。在所检测到的十一种 PAHs 中,苊、芴和荧蒽在大多数地下水样本中占主导地位。对垃圾填埋场周围地下水样本的分析显示,PAHs 的浓度从未检出到 2.19μg/L 不等。结果表明,垃圾场下方的沉积物污染程度较低,而深度为 18-30 米的浅层含水层污染严重,尤其是在雨季。已经形成了一个椭圆形的污染晕,从西到东跨度 3 公里,从南到北跨度 2 公里,主要发生在地下水深度为 2-4 米的地方。为了识别 PAH 的来源,研究了选定 PAHs 的诊断比和主成分分析,表明周口垃圾填埋场的 PAHs 既有源自热解的,也有源自成岩作用的混合来源。地下水位波动对浅层含水层内有机污染物的分布起着重要作用。根据主要污染物(PAHs),建立了周口垃圾填埋场周围第四纪含水层中渗滤液迁移的概念模型,以描述污染过程。已经确定了受渗滤液污染的地下水带。