南充市表层土壤中多环芳烃的源解析研究

Source apportionment of polycyclic aromatic hydrocarbons in surface soil from nanchong

运用同分异构体比率、聚类分析法和主成分因子载荷法对南充市表层土壤多环芳烃(PAHs)污染源进行了定性和定量分析。研究表明:同分异构体比率分析揭示表层土壤中PAHs污染来源以燃烧源为主;聚类分析将土壤中13种PAHs组分分成3个主群,3个主群分别指示为交通类PAHs污染、煤燃烧类PAHs污染和混合类PAHs污染。主成分因子/多元线性回归分析显示,PAHs主要来源于3大污染源,并定量计算了3种源的贡献量,其中交通燃油污染的贡献率最大(占42.4%),而燃煤燃烧排放、混合污染所占比例分别为32.4%和25.2%。

Relative concentrations of PAH compounds with isomer ratios and Cluster Analysis and The factor analysis-multiple linear regression analysis were used to identify qualitatively and quantitatively the possible sources of PAHs in soil of Nanchong.Studies show the main source of PAHs in surface soil was incomplete combustion of petroleum and coal by isomer ratio analysis.PAHs cluster analysis inferring the sources of PAHs indicated that the main sources of PAHs in the soils were incomplete combustion of oil and coal.13 PAHs in surface soil were divided into three main component groups by Class analysis.Three main group indicated that the main sources of PAHs in the soils were traffic vehicles emission and industry coal combustion and coal combustion /vehicle exhaust.The factor analysis-multiple linear regression analysis indicated PAH contaminations in surface soils originated from vehicles emission and industry coal burning and mixed PAHs pollution.The contributions based on multiple linear regression of major sources were quantified as 42.4% from traffic vehicles,32.4 % from coal burning and 25.2 % from coal combustion /vehicle exhaust respectively.