摘要
本文对湛江湾湾内、湾口和湾外柱状沉积物n-alkanes和PAHs的空间分布、成分谱特征和排放源进行调查分析。结果表明：（1）n-alkanes和PAHs的空间分布一致,浓度水平由高到低依次为：湾内、湾口、湾外,垂直变化不明显;（2）n-alkanes和PAHs的成分谱和L/H、CPI、Ant/（Ant＋Phe）、Flu/（Flu＋Pyr）、BaA/（BaA＋Chry）、IP/（IP＋BghiP）等特征参数比值以及主成分分析结果表明C25～C35高碳数n-alkanes的高等植物贡献具有绝对优势,C14～C24中低碳数的n-alkanes和PAHs则有共同的石油、化石燃料燃烧和生物质燃烧等人为源;（3）C14～C24中低碳n-alkanes与PAHs的源解析结果相同,其线性相关系数在0.67以上,表明两者具有较好的相关性,但两者之间的定量关系还需进一步的研究。本研究表明n-alkanes和PAHs对人为源的指示具有一致性,两者具有良好的相关性,能够较好地反映城市的社会经济状况,在进一步的研究中可以建立两者之间的定量关系并形成新的参数,提高人为源解析结果的准确性,深入反映人类活动对海洋环境的影响。
Spatial distribution and components of n-alkanes and PAHs in the core sediments were investigated in Zhanjiang bay,and their different and common sources were discussed by methods of principal component analysis,correlation analysis and ratios of L/H,CPI,Ant/（Ant＋Phe）,Flu/（Flu＋Pyr）,BaA/（BaA＋Chry）and IP/（IP＋BghiP）.This study aimed to found the different and common characteristics of n-alkane and PAHs from human activities,and future discussed their sources and effects of human activity on marine environment.Both of n-alkanes and PAHs had the same spatial distributions.Their levels were higher in bay and lower in out of bay but non-significant changes in vertical sediment samples.The CPI,results of principal component analysis,components spectrum of n-alkane and PAHs and the ratios showed that high molecular n-alkanes（C25～C35）were predominantly from higher plants but C14～C24n-alkanes were from anthropogenic sources of oil leakage,fossil fuel combustion and biomass burning as the sources of PAHs.The results of this study indicated that n-alkanes and PAHs had the same anthropogenic sources and good correlation but their quantitative relation need further study,and both of them can be used to disused the effects of human activities on marine environment.
出处
《海洋学报》
CAS
CSCD
北大核心
2016年第8期115-123,共9页
基金
海洋公益性行业科研专项经费项目(201505027-1)
