Department of Civil and Environmental Engineering, Hanyang University, 17 Haengdang-dong, Seongdong-gu, Seoul 133-791, South Korea.
J Hazard Mater. 2011 Jan 30;185(2-3):1374-80. doi: 10.1016/j.jhazmat.2010.10.058. Epub 2010 Oct 21.
Total petroleum hydrocarbon (TPH) is an important environmental contaminant that is toxic to human and environmental receptors. However, human health risk assessment for petroleum, oil, and lubricant (POL)-contaminated sites is especially challenging because TPH is not a single compound, but rather a mixture of numerous substances. To address this concern, this study recommends a new human health risk assessment strategy for POL-contaminated sites. The strategy is based on a newly modified TPH fractionation method and includes an improved analytical protocol. The proposed TPH fractionation method is composed of ten fractions (e.g., aliphatic and aromatic EC8-10, EC10-12, EC12-16, EC16-22 and EC22-40). Physicochemical properties and toxicity values of each fraction were newly defined in this study. The stepwise ultrasonication-based analytical process was established to measure TPH fractions. Analytical results were compared with those from the TPH Criteria Working Group (TPHCWG) Direct Method. Better analytical efficiencies in TPH, aliphatic, and aromatic fractions were achieved when contaminated soil samples were analyzed with the new analytical protocol. Finally, a human health risk assessment was performed based on the developed tiered risk assessment framework. Results showed that a detailed quantitative risk assessment should be conducted to determine scientifically and economically appropriate cleanup target levels, although the phase II process is useful for determining the potency of human health risks posed by POL-contamination.
总石油烃（TPH）是一种重要的环境污染物，对人类和环境受体具有毒性。然而，石油、油和润滑剂（POL）污染场地的人体健康风险评估尤其具有挑战性，因为 TPH 不是单一化合物，而是多种物质的混合物。为了解决这个问题，本研究为 POL 污染场地推荐了一种新的人体健康风险评估策略。该策略基于新修改的 TPH 分级方法，并包括改进的分析方案。所提出的 TPH 分级方法由十个部分组成（例如，脂肪族和芳香族 EC8-10、EC10-12、EC12-16、EC16-22 和 EC22-40）。本研究中，对每个部分的理化性质和毒性值进行了新的定义。该分步超声分析过程是为测量 TPH 部分而建立的。分析结果与 TPH 标准工作组（TPHCWG）直接方法的结果进行了比较。当用新的分析方案分析污染土壤样品时，在 TPH、脂肪族和芳香族部分实现了更好的分析效率。最后，根据所开发的分层风险评估框架进行了人体健康风险评估。结果表明，尽管第二阶段过程有助于确定 POL 污染对人体健康风险的效力，但应进行详细的定量风险评估，以确定科学和经济上适当的清理目标水平。
