【摘 要】
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Soil ingestion is of increasing concern for assessing health risk from polycyclic aromatic hydrocarbons (PAHs) in contaminated soils because soil ingestion
【机 构】
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Department of Soil Environmental Science, Research Center for Eco-Environmental Sciences, Chinese Ac
【出 处】
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DaLian Internationall Symposia and Exhibition on Chromatogra
论文部分内容阅读
Soil ingestion is of increasing concern for assessing health risk from polycyclic aromatic hydrocarbons (PAHs) in contaminated soils because soil ingestion is one of the potentially important pathways of exposure to environmental pollutants.This study was conducted to investigate the level of PAH contamination and oral bioaccessibility in surface soils, using physiologically based in vitro gastro-intestinal tests (mimicking the chemical, thermal, and anaerobic environment in the human digestive tract) regarding both gastric and small intestinal conditions.Wastewater-irrigated soils were sampled from the metropolitan areas of Beijing and Tianjin, China, which were highly contaminated with PAHs.Clean (reference) soils samples were also collected for comparisons.For PAH concentrations, 10g of freeze-dried soil was extracted through Soxhlet extraction procedure for 24 h with 200 ml dichloromethane.
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