Bayat Javad, Hashemi Seyed Hossein, Khoshbakht Korros, Deihimfard Reza
Department of Environmental Pollutants Research, Environmental Sciences Research Institute, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran.
Department of Agroecology, Environmental Sciences Research Institute, Shahid Beheshti University, G.C., Tehran, 1983963113, Iran.
Environ Monit Assess. 2016 Nov;188(11):612. doi: 10.1007/s10661-016-5614-7. Epub 2016 Oct 11.
The analysis of aliphatic hydrocarbons, which are composed of n-alkanes as well as branched and cyclic alkanes, can be used to distinguish between the sources of hydrocarbon contamination. In this study, the concentration of aliphatic hydrocarbons, soil pH, and organic matter in agricultural soils located south of Tehran were monitored. Eighty-three soil samples were taken from two depth ranges of 0-30 and 30-60 cm. The results showed that aliphatic compounds ranged from 0.22-68.11 mg kg at the top to 0.33-53.18 mg kg at subsoil. The amount of hydrocarbons increases from the northern parts toward the south, and hydrocarbon pollutants originated from both petroleum and non-petroleum sources. Higher concentrations of aliphatic compounds in the southern parts indicated that, aside from the practice of irrigating with untreated wastewater, leakage from oil refinery storage tanks possibly contributed to soil pollution. The results also showed that several sources have polluted the agricultural soils. It is necessary to develop a new local pollution criterion as a diagnostic index that includes not only hydrocarbons but also other parameters such as heavy metal content in both soil and untreated wastewater, surface runoff, and other irrigation water resources to determine the exact origin of pollution.
由正构烷烃以及支链烷烃和环烷烃组成的脂肪烃分析，可用于区分烃类污染的来源。在本研究中，对德黑兰以南农业土壤中的脂肪烃浓度、土壤pH值和有机质进行了监测。从0 - 30厘米和30 - 60厘米两个深度范围采集了83个土壤样本。结果表明，脂肪族化合物在表层土壤中的含量范围为0.22 - 68.11毫克/千克，在下层土壤中的含量范围为0.33 - 53.18毫克/千克。烃类含量从北部向南增加，烃类污染物来源于石油和非石油两种来源。南部地区脂肪族化合物浓度较高，这表明除了使用未经处理的废水灌溉外，炼油厂储油罐的泄漏可能也是土壤污染的原因之一。结果还表明，有多个污染源污染了农业土壤。有必要制定一个新的本地污染标准作为诊断指标，该指标不仅要包括烃类，还要包括其他参数，如土壤和未经处理的废水中的重金属含量、地表径流以及其他灌溉水资源，以确定污染的确切来源。
