渤海表层沉积物中多环芳烃赋存特征及来源分析

对渤海表层沉积物中典型持久性有毒物质多环芳烃的浓度水平、空间分布及污染来源进行了探讨,结果表明,PAHs总量(PAHs)的浓度范围为(21.9~ 586.4)10-9(干重,dw),平均值为175.110-9 dw,其中渤海湾海区PAHs的整体含量要明显高于其它区域,平均含量达到430.910-9 dw。PAHs与总有机碳(TOC)含量二者之间呈显著线性相关(p0.05),表明有机质含量是影响PAHs在海水中迁移和分配的一个主要因素。不同环数PAHs的特征分布表明,渤海海域PAHs主要来自石油及其产品、煤和生物质的燃烧。

Occurrence and source of polycyclic aromatic hydrocarbon (PAHs) in the surficial sediment of the Bohai Sea

The concentration level,spatial distribution and source of polycyclic aromatic hydrocarbon (PAHs) in the surficialsediments of the Bohai Sea were investigated.The results indicated that the concentrations oftotal PAHs (PAHs) ranged from 21.910-9 to 586.410-9(dry weight,dw) with the mean value of 175.110-9 dw.The concentration in sediments of the Bohai Bay with the mean value of 430.910-9 dw was significantly higher than those of the other areas.Significantly positive correlation between PAHs and TOCs(p0.05)implied thatthe organic contentwas one importantfactor affecting the migration and distribution of PAHs in seawater.The characteristic distribution of different rings indicated that PAHs in the Bohaiseawas mainly from the combustionof petroleum and related products,coal and biomass.