Department of Chemical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran 76188-68366; National Iranian Oil Company, Head of Research and Products Engineering of National Iranian Oil Products Distribution Company of Kerman, Iran 7636-67355.
Department of Chemical Engineering, Faculty of Engineering, Shahid Bahonar University of Kerman, Kerman, Iran 76188-68366.
J Hazard Mater. 2021 Jul 5;413:125328. doi: 10.1016/j.jhazmat.2021.125328. Epub 2021 Feb 5.
Since a large amount of sediment organic matter and hydrophobic organic compounds presented in oily sludge sediments in petroleum storage tanks, separation or degradation of these compounds are environmentally important. Therefore, the effect of four solvents and their combinations on the extraction of hydrocarbons in oily sludge from the dredging of petroleum storage tanks in Iran was investigated in this study. Besides, the number of extraction steps and the temperature were also investigated, and the mechanical shaking method was introduced and compared with that of mixing and Soxhlet. The results showed that chloroform held the best solvent, and the combination of solvents showed better extraction than the pure solvents individually. Furthermore, hydrocarbon extraction increased as temperature and extraction steps raised. According to gas chromatography tests, all the solvents revealed acceptable extraction scales. Moreover, the amounts of extracted hydrocarbons by the mechanical shaking method had better results than that of mixer and Soxhlet. The highest percentage of that belonged to mechanical shaking method by 82.8%. It seems that the mechanical shaking method is a simple, fast, low-cost, and suitable alternative to the Soxhlet method for hydrocarbon extraction in oily sludge and petroleum sludge-contaminated soil.
由于储油罐疏浚油泥沉积物中存在大量的泥沙有机质和疏水性有机化合物，因此这些化合物的分离或降解具有重要的环境意义。因此，本研究考察了四种溶剂及其组合对伊朗储油罐疏浚油泥中烃类物质的萃取效果。此外，还考察了萃取步骤的数量和温度，引入了机械搅拌法并与混合法和索氏提取法进行了比较。结果表明，三氯甲烷是最好的溶剂，混合溶剂的萃取效果优于单一溶剂。此外，随着温度和萃取步骤的增加，烃类物质的萃取量也增加。根据气相色谱测试，所有溶剂的萃取效果都在可接受范围内。此外，机械搅拌法萃取的烃类物质的量比混合法和索氏提取法要好。其中，机械搅拌法的萃取率最高，达到 82.8%。看来，对于油泥和石油污染土壤中的烃类物质萃取，机械搅拌法是一种简单、快速、低成本、且适合替代索氏提取法的方法。
