摘要
利用气相色谱-质谱联用仪对黄河口表层沉积物中25种多环芳烃进行了分析.结果显示：沉积物中w（PAHs）为48.56-277.12 ng/g,平均值为122.92 ng/g,表明PAHs处于较低的污染水平.PAHs组分中2-3环PAHs所占比例最大,其中w（萘）最高,w（菲）,w（1-甲基萘）和w（2-甲基萘）也较高.PAHs来源诊断比值〔w（苝）/w（亲体PAHs）〕分析表明,石油污染和化石燃料的高温燃烧是黄河口沉积物中PAHs的主要来源;因子分析/多元线性回归分析显示,PAHs主要来源于交通燃油和天然气燃烧排放、石油污染、焦炉燃烧排放三大污染源,其中石油污染贡献最大（占74.5%）,而交通燃油和天然气燃烧排放、焦炉燃烧排放所占比例相对较小,分别为12.8%和12.7%.
Concentrations of 25 polycyclic aromatic hydrocarbons （PAHs） in surface sediments collected from the Yellow River Estuary were measured by GC-MS. The results showed that the total concentrations of PAHs in the sediments varied from 48.56 ng/g to 277.12 ng/g （average concentration was 122.92 ng/g）, which indicates that total PAHs concentrations were at lower level compared to relevant areas worldwide. The proportion of 2 - 3-ring PAHs was quite high. Among the 25 individual PAHs, naphthalene was highest, and phenanthren, 1- methylnaphthalene and 2-methylnaphthalene were also prevalent. The diagnostic ratios reflected a mixed PAH input pattern of petrogenic and pyrolytic processes in sediments. The factor analysis-multiple linear regression analysis indicated PAH contaminations in Yellow River Estuary area originated from vehicles emission and natural gas burning, oil spill and coking industry. The oil spill, vehicles emission and natural gas burning and coking finance combustion respectively accounted for 74.5 %, 12.8 % and 12.7 % of the total PAHs.
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2008年第5期79-84,共6页
Research of Environmental Sciences
基金
国家自然科学基金项目(40706039)
关键词
多环芳烃
源解析
因子分析
多元线性回归
表层沉积物
PAHs
source apportionment
factor analysis
multiple linear regression analysis
surface sediment
