受土地利用影响的土壤中16种优先多环芳烃的量化、来源和相关风险

IF 1 Q4 CHEMISTRY, MULTIDISCIPLINARY Ovidius University Annals of Chemistry Pub Date : 2021-01-01 DOI:10.2478/auoc-2021-0008
O. O. Emoyan, G. Tesi, E. Ohwo, Eze W. Odali
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引用次数: 5

摘要

摘要本研究确定了不同土地利用环境下16种重点多环芳烃在土壤深处的空间组成、分布、来源及相关风险。样品采集于土壤表层(0 ~ 15 cm)和下层(15 ~ 30 cm)的9个土地利用场所。样品采用二氯甲烷/正己烷超声萃取,硅胶/氧化铝填充柱净化。采用气相色谱-质谱联用仪(GC-MS)测定多环芳烃含量。多环芳烃异构体和Σ - 16多环芳烃的浓度分别为ND ~ 16876 μg·kg−1和346 ~ 44052 μg·kg−1。Σ 16PAHs的赋存状态表现为底土>表层土的浓度负荷。ΣPAHs浓度超过DPR-EGAPSIN目标值和干预值的样品分别为91%和11%。总的癌症风险从低到中等风险水平不等。多环芳烃的来源主要是土地利用场地内石油燃烧排放的高低和柴油燃烧发电机周围的固定源。研究表明,与柴油燃烧相关的土地利用活动对土地利用场所的污染负荷贡献了相当大的Σ16PAHs,具有潜在的生态和人类暴露风险。
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Quantification, sources, and associated risks of 16-priority polycyclic aromatic hydrocarbons from selected land-use impacted soils
Abstract This study determined the spatial compositional occurrence, sources, and the associated risks of sixteen priority PAHs in soil depths from the selected land-use environments. Samples were collected from nine generator land-use sites in the top (0-15 cm) and sub (15-30 cm) soil depths. Sample extraction was by ultrasonication with dichloromethane/n-hexane and clean-up in silica gel/alumina packed column. The level of PAHs was determined using a gas chromatography-mass spectrometer (GC-MS). The concentrations of PAHs isomers and the Σ 16 PAHs ranged from ND to 16876 μg·kg−1, and from 346 to 44052 μg·kg−1 respectively. The Σ 16PAHs occurrence showed concentration load in the order of subsoil > topsoil. The ΣPAHs concentrations exceeded the DPR-EGAPSIN target and intervention value in 91% and 11% of the samples respectively. The total cancer risk ranged from low to moderate risk-based levels. The PAHs sources were attributed to low and high petroleum combustion emissions and stationary sources around the diesel combustion electricity generator in the land-use sites. This study revealed that the land-use activities associated with diesel combustion have contributed a significant amount of Σ16PAHs to the pollution load in the land-use sites with potential for ecological and human exposure risks.
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来源期刊
Ovidius University Annals of Chemistry
Ovidius University Annals of Chemistry CHEMISTRY, MULTIDISCIPLINARY-
自引率
11.10%
发文量
20
审稿时长
5 weeks
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