Creosote is a multicomponent oil classified as a dense non-aqueous phase liquid (DNAPL) produced from coal tar distillation. The concept of phase distribution is critical in decision-making to remediate contaminated sites. The creosote mass transfer between sorbed, aqueous, vapor, and DNAPL phases is controlled by physicochemical characteristics, geology of the site, and environment conditions. This study evaluated phase distribution of the main polycyclic aromatic hydrocarbons (PAHs) of creosote in a sandy soil with low organic matter content. The creosote was collected from a contaminated site in São Paulo, Brazil, and was characterized by gas chromatography–mass spectrometry (GC-MS). Clean soil was collected upgradient from the same area. Initially, the soil was artificially contaminated with creosote. After, the contaminated soil was put in contact with clean water in sealed vials for 72 h. Samples of the soil, vapor, and liquid phases were collected and analyzed by GC-MS. In total, 50 compounds were identified in the creosote, and 9 PAHs were selected to be studied, which represented around 30% of total creosote mass. The major contaminant concentration was detected in the sorbed phase. For instance, naphthalene mass was distributed in sorbed (33.0%), DNAPL (1.5%), aqueous (3.4%), and vapor (0.2%) phases. The results provided an understanding of the contaminant species partitioning that occurs in a real contaminated site.

中文翻译：

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杂酚在不同基质（土壤，水和空气）中的表征和分配行为

杂酚油是一种多组分油，被分类为由煤焦油蒸馏制得的致密非水相液体（DNAPL）。阶段分布的概念对于补救受污染场地的决策至关重要。吸附相，水相，蒸气相和DNAPL相之间的杂酚油质量传递受理化特性，现场地质状况和环境条件的控制。这项研究评估了杂多酚的主要多环芳烃（PAHs）在低有机质含量的沙土中的相分布。杂酚油是从巴西圣保罗的一个受污染的地点收集的，并用气相色谱-质谱法（GC-MS）进行了表征。从同一地区收集了干净的土壤。最初，土壤被杂酚油人工污染。后，将污染的土壤与密封小瓶中的清水接触72小时。收集土壤，气相和液相样品，并通过GC-MS分析。在杂酚油中总共鉴定出50种化合物，并选择了9种PAH进行研究，约占杂酚油总质量的30％。在吸附相中检测到主要污染物浓度。例如，萘质量分布在吸附相（33.0％），DNAPL（1.5％），水相（3.4％）和气相（0.2％）中。结果提供了对在实际污染场所中发生的污染物种类分配的理解。约占杂酚总质量的30％。在吸附相中检测到主要污染物浓度。例如，萘质量分布在吸附相（33.0％），DNAPL（1.5％），水相（3.4％）和气相（0.2％）中。结果提供了对在实际污染场所中发生的污染物种类分配的理解。约占杂酚总质量的30％。在吸附相中检测到主要污染物浓度。例如，萘质量分布在吸附相（33.0％），DNAPL（1.5％），水相（3.4％）和气相（0.2％）中。结果提供了对在实际污染场所中发生的污染物种类分配的理解。