Department of Environmental Engineering, University of Tehran, NO.23, P.O. Box 14155-6135, Azin Avenue, Ghods Street, Enghelab Square, Tehran, Iran.
Environ Monit Assess. 2014 Jun;186(6):3541-52. doi: 10.1007/s10661-014-3637-5. Epub 2014 Feb 12.
For years, the Dorson Abad region has been extremely polluted by Tehran Oil Refinery due to leaking from its underground pipelines, storage tanks, and evaporation ponds. To assess the concentrations of hazardous polycyclic aromatic hydrocarbon (PAH) compounds, soil samples were collected from the grounds at and adjacent to a polluted stream located in the study area. The samples were then analyzed, and the results revealed that 12 of the 16 USEPA PAHs were noticeably present in the soil, which, among them, benzo[k]fluoranthene and chrysene had the highest concentrations with averages of 357.17 and 173.38 mg/kg, respectively. A comparison of the obtained concentrations with the soil screening levels indicated that both benzo[k]fluoranthene and chrysene concentrations were substantially higher than EPA screening level values, signifying the necessity of soil remediation for these contaminants in the area. Techniques such as soil washing/flushing, high temperature thermal desorption, and solidification/stabilization were investigated for treatment of the contaminated soil; solidification/stabilization is recommended as an applicable and cost-effective remediation method for Dorson Abad due to the size of the region, relatively low cost of the binder (cement), and low volatility of benzo[k]fluoranthene and chrysene.
多年来，由于地下管道、储油罐和蒸发池的泄漏，德龙阿巴德地区一直受到德黑兰炼油厂的严重污染。为了评估危险多环芳烃（PAH）化合物的浓度，从研究区域受污染溪流的场地和附近采集了土壤样本。然后对这些样本进行了分析，结果表明，土壤中存在 16 种美国环保署（USEPA）PAH 中的 12 种，其中苯并[k]荧蒽和屈的浓度最高，平均值分别为 357.17 和 173.38 毫克/千克。将获得的浓度与土壤筛选水平进行比较表明，苯并[k]荧蒽和屈的浓度都明显高于 EPA 筛选水平值，表明该地区需要对这些污染物进行土壤修复。对受污染土壤进行了土壤洗涤/冲洗、高温热解吸和固化/稳定化等处理技术的研究；由于该地区面积较大、粘结剂（水泥）成本相对较低以及苯并[k]荧蒽和屈的挥发性较低，因此建议将固化/稳定化作为一种适用且具有成本效益的德龙阿巴德修复方法。
