工业应用中使用的数千种有机物质最终会进入土壤,并可能对人类健康产生负面影响。由于分析限制,通常在环境介质中监测有限数量的目标污染物。在这项研究中,开发了一种通过二维气相色谱高分辨率飞行时间质谱法快速分析污染区(化工园区)的多个土壤样品的非目标筛选方法。通过数据简化和视觉评估,初步分析了土壤样品中存在的化合物类型。选取化工园区样品中检测频率≥40%的有机化合物81种进行鉴定,包括38种PAHs,26含氧有机化合物,八种含N化合物,和其他九种化合物。研究了工业园区中有机化合物的潜在来源。土壤中的一些药物和有机合成中间体受到附近化工厂的影响。在评估相对丰度和检测频率后,初步确定了36种可能对环境构成潜在风险的污染物。研究结果有助于评估洋口工业园区周围的环境风险,对评估其他污染区域的风险也有帮助。
Thousands of organic substances that are used in industrial applications ultimately enter the soil and may negatively affect human health. Limited numbers of target pollutants are usually monitored in environmental media because of analytical limitations. In this study, a non-target screening method for quickly analyzing multiple soil samples from a contaminated area (a chemical industry park) by two-dimensional gas chromatography high-resolution time-of-flight mass spectrometry was developed. The types of compounds present in the soil samples were preliminarily analyzed through data simplification and visual assessment. A total of 81 organic compounds with detection frequencies ≥40% in the samples from the chemical industry park were selected for identification, including 38 PAHs, 26 oxygenated organic compounds, eight N-containing compounds, and nine other compounds. Potential sources of the organic compounds in the industrial park were investigated. Some pharmaceutical and organic synthetic intermediates in the soil were affected by nearby chemical plants. After assessing the relative abundances and detection frequencies, 36 pollutants that may pose potential risks to the environment were preliminarily identified. The results of the study were helpful for assessing environmental risks around Yangkou industrial park and they will be helpful when assessing risks in other contaminated areas.