首页> 美国卫生研究院文献>Environmental Engineering Science >Distribution Sources and Association of Polycyclic Aromatic Hydrocarbons Black Carbon and Total Organic Carbon in Size-Segregated Soil Samples Along a Background–Urban–Rural Transect
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Distribution Sources and Association of Polycyclic Aromatic Hydrocarbons Black Carbon and Total Organic Carbon in Size-Segregated Soil Samples Along a Background–Urban–Rural Transect

机译:沿背景-城市-农村样带的尺寸分离土壤样品中多环芳烃黑碳和总有机碳的分布来源和缔合

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摘要

Soil samples were collected over a year-long period along a background–urban–rural transect in Delhi, India for the analysis of polycyclic aromatic hydrocarbons (PAHs), black carbon (BC), and total organic carbon (TOC) in five grain size fractions, x, in μm of 0≤x<53 (I), 53≤x<250 (II), 250≤x<500 (III), 500≤x<2000 (IV), and their sum (total: T). Maximum concentrations of PAH, BC, and TOC were observed in the smallest fraction (I) comprising silt and clay, irrespective of site or season. Results of the molecular diagnostic ratios and principal component analysis (PCA) identified coal, wood, biomass burning, and vehicular emissions as major sources of PAHs at all the three sites, while BC/TOC ratios pointed toward biomass combustion as the chief source of carbonaceous species. This work presents the first such rural-urban transect study considering PAH, BC, and TOC in soil.
机译:沿印度德里的背景-城市-农村样带,在长达一年的时间内收集了土壤样品,以分析五种粒度的多环芳烃(PAHs),黑碳(BC)和总有机碳(TOC)分数x,以μm为单位的0≤x<53(I),53≤x<250(II),250≤x<500(III),500≤x<2000(IV)及其和(总计T )。无论位置或季节如何,在包含粉砂和粘土的最小组分(I)中都观察到PAH,BC和TOC的最大浓度。分子诊断率和主成分分析(PCA)的结果确定了煤炭,木材,生物质燃烧和车辆排放是这三个地点的PAHs的主要来源,而BC / TOC比率则表明生物质燃烧是碳质燃料的主要来源。种类。这项工作提出了第一个考虑土壤中PAH,BC和TOC的农村到城市样带研究。

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