Abstract In this study, a combination of the diagnostic binary ratios of PAHs and multivariate descriptive statistics was applied to identify the sources of PAHs in Chilean terrestrial soils. A total of 15 PAHs from the terrestrial soil of 28 locations in three cities of Chile were chemically characterized using gas chromatography mass spectrometry (GC-MS). The total concentrations of twelve likely carcinogenic PAHs were defined as the sum of Phe, An, Fluo, Pyr, B[a]A, Chry, B[b]F, B[k]F, B[a]P, Ind, D[a, h]A and B[g, h, i]P and ranged from 0.0215 to 4.37 μg g−1 with an arithmetic mean of 0.618 ± 0.911 μg g−1. The levels of these PAHs were classified as moderate to high compared to World Soils (WS). All sampling stations were dominated by high molecular weight PAHs, four-ring (39.1%) and five-ring (29.6%) PAHs were the most abundant groups in the terrestrial soils of Chile. The PAH diagnostic ratios suggested that PAHs are primarily of pyrogenic origin. Further multivariate descriptive statistics (i.e., hierarchical cluster analysis (HCA) and principal components analysis (PCA)) identified pyrogenic combustion as the main emission source of PAH contamination in Chilean terrestrial soils.

中文翻译：

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智利陆地土壤中多环芳烃的来源鉴定

摘要 在这项研究中，多环芳烃的诊断二元比率和多元描述统计相结合，用于识别智利陆地土壤中多环芳烃的来源。使用气相色谱质谱法 (GC-MS) 对来自智利三个城市 28 个地点的陆地土壤中的 15 种多环芳烃进行了化学表征。十二种可能致癌的多环芳烃的总浓度定义为 Phe、An、Fluo、Pyr、B[a]A、Chry、B[b]F、B[k]F、B[a]P、Ind、 D[a, h]A 和 B[g, h, i]P 范围从 0.0215 到 4.37 μg g-1，算术平均值为 0.618 ± 0.911 μg g-1。与世界土壤 (WS) 相比，这些多环芳烃的水平被归类为中到高。所有采样站均以高分子量 PAH、四环 (39.1%) 和五环 (29.1%) 为主。6%) 多环芳烃是智利陆地土壤中含量最丰富的类群。PAH 诊断比率表明 PAH 主要来源于热源。进一步的多变量描述性统计（即层次聚类分析 (HCA) 和主成分分析 (PCA)）将热原燃烧确定为智利陆地土壤中 PAH 污染的主要排放源。