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利用GC/MS测定了渤海及其邻近海域表层沉积物中的16种优控多环芳烃(PAHs),采用多种数据分析技术解析了PAHs的来源。结果显示:除了萘、苊烯、苊在部分样品中未检出之外,其他13种PAHs在所有样品中均有检出。总PAHs的含量范围为:(148.27~1211.81)×10-9,平均值为507.13×10-9。TOC(总有机碳)与总PAHs显著相关(R=0.66,P=0.0002),表明TOC对研究区域PAHs的分布有重要作用。该海域PAHs以高环(4~6环)为主,轻重比值(LMW/HMW)表明该区域的PAHs主要来自高温燃烧源。分子诊断比值分析也表明,PAHs主要来自生物质、煤炭和石油燃烧。主成分分析-多重线性回归分析(PCA-MLR)表明,沉积物中PAHs主要来自煤炭燃烧源、交通源(石油燃烧)、焦化源和石油源,其贡献分别为54.3%,28.6%,13.4%和3.7%。
Sixteen PAHs in surface sediments of the Bohai Sea and its adjacent waters were determined by GC / MS. The sources of PAHs were analyzed by various data analysis techniques. The results showed that except for naphthalene, acenaphthylene, acenaphthene in some samples not detected, the other 13 kinds of PAHs were detected in all samples. The total PAHs content range: (148.27 ~ 1211.81) × 10-9, with an average of 507.13 × 10-9. TOC (Total Organic Carbon) was significantly correlated with total PAHs (R = 0.66, P = 0.0002), indicating that TOC played an important role in the distribution of PAHs in the study area. The high PAHs (4 ~ 6 rings) are dominant in this area, and the LMW / HMW indicates that the PAHs in this area mainly come from high temperature combustion sources. Molecular diagnostic ratio analysis also showed that PAHs mainly come from biomass, coal and oil combustion. PCA-MLR indicated that PAHs in sediments mainly came from coal combustion sources, transportation sources (petroleum combustion), coking sources and petroleum sources, contributing 54.3%, 28.6% and 13.4% of the total respectively. And 3.7%.