ABSTRACT

This study investigated the removal of polycyclic aromatic hydrocarbons (PAHs) from soils around a cement factory in Bursa-Turkey. UVA and UVA-H₂O₂ applications were carried out with the particular apparatus. The evaporated PAHs were collected with the polyurethane foam (PUF) column in this apparatus. UVA applications were carried out simultaneously at two temperatures (18°C and 35°C) to determine the effect of temperature on PAHs’ removal. Evaporated PAH amounts and PAH removal efficiencies were calculated. In UVA applications (without using H₂O₂), ∑₁₂ PAH removal efficiency was calculated as 90%, and this value increased to 95% with the use of H₂O₂. The highest PAH removal ratio (95%) was obtained with UVA-H₂O₂ (1% H₂O₂) application. An increase in temperature did not contribute significantly to the removal of PAHs (except for 20% H₂O₂). During the experiments, the amount of evaporated PAHs from soil to air increased depending on the temperature. It was observed that 80% of evaporated PAHs were formed 3 ring compounds (Phe, Ant) at 35°C. It was concluded that only low H₂O₂ dose (1%) was effective on the removal of PAHs from soils at 18°C and 35°C.

摘要

这项研究调查了布尔萨土耳其一家水泥厂周围土壤中多环芳烃（PAHs）的去除。UVA和UVA-H ₂ O _2的施用是使用特定设备进行的。在该设备中，用聚氨酯泡沫（PUF）柱收集蒸发的PAH。在两个温度（18°C和35°C）下同时进行UVA应用，以确定温度对PAHs去除的影响。计算了蒸发的PAH量和PAH去除效率。在UVA应用中（不使用H ₂ O ₂），计算出的∑ ₁₂ PAH去除效率为90％，使用H ₂ O _2时该值增加到95％。使用UVA-H ₂ O ₂（1％H ₂ O ₂）可获得最高的PAH去除率（95％）。温度升高对去除PAHs的贡献不大（除了20％H ₂ O ₂）。在实验过程中，从土壤到空气的多环芳烃蒸发量随温度的升高而增加。观察到在35℃下80％的蒸发的PAHs形成了3个环化合物（Phe，Ant）。结论是，只有低H ₂ O ₂剂量（1％）对18°C和35°C的土壤中PAHs的去除有效。