基于主成分分析法的浑河抚顺段多环芳烃来源分析

基于主成分分析法的浑河抚顺段多环芳烃来源分析(论文4000字)
摘要：随着城镇化程度的提高，给生态环境带来负面影响，多环芳烃（PAHs）由于难降解等特性存在于河流、土壤环境中，对居民健康造成一定威胁。本文选取浑河抚顺段与抚新城为研究区域，利用同分异构体比值法与主成分分析法对城镇化进程中多环芳烃来源进行解析，发现河流水体干湿两季中PAHs皆来源于石油燃烧与煤、柴等生物质燃烧，湿季中PAHs来源存在部分石油输入；沈抚新城干湿两季表层土壤中PAHs来源皆包括石油泄露与大气沉降混合源、石油泄露与柴油燃烧混合源以及煤燃烧与机动车排放混合源，差异在于湿季PAHs来源包括柴油燃烧源；对比两种方法发现主成分分析法得到的结果更具体，为相关研究提供了理论依据。
关键词：PAHs；同分异构体比值法；主成分分析法；干湿两季
Source Analysis of Polycyclic Aromatic Hydrocarbons in Fushun Section of Hunhe River Based on Principal Component Analysis
Abstract: As the degree of urbanization increases, it has a negative impact on the ecological environment. Polycyclic aromatic hydrocarbons (PAHs), which are hard to degrade, exist in the rivers and soil environment, posing a certain threat to the residents' health. In this paper, the Fushun section of the Fushun River and the new city of Fushun were selected as the study area. The PAHs were analyzed by the method of isomer ratio and principal component analysis. The results showed that PAHs in both wet and dry river water sources were all from The PAHs sources in the wet season were partly oil input. The sources of PAHs in surface soil of both wet and dry seasons in Shen-Fu new city included both the mixture source of oil leakage and atmospheric deposition, the mixture source of oil leakage and diesel combustion and the mixed sources of coal combustion and vehicle emissions. The difference lies in the sources of PAHs in wet season including diesel combustion sources. Comparing the two methods, the results obtained by principal component analysis are more specific and provide the theoretical basis for the related research.
Key words: PAHs; isomer ratio method; principal component analysis; dry and wet seasons