Distribution, source apportionment, and transport of PAHs in sediments from the Pearl River Delta and the northern South China Sea
Distribution, source apportionment, and transport of PAHs in sediments from the Pearl River Delta and the northern South China Sea
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DOI：
10.1007/s00244-007-9105-2
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发表时间：
2008-07-01
影响因子：
4
通讯作者：
Zeng, Eddy Y.
中科院分区：
文献类型：
--
作者：
Luo, Xiao-Jun;Chen, She-Jun;Zeng, Eddy Y.
对珠江三角洲和南海北方陆架区59个河流表层沉积物中的多环芳烃（PAHs）进行了测定。多环芳烃总浓度从138至6，793纳克/克干重不等。采用诊断比和多元线性回归的主成分分析方法，对珠江三角洲沉积物中多环芳烃的输入来源进行了定性和定量分析。结果表明，平均而言，煤和木材燃烧，石油泄漏，汽车排放和自然源的贡献，分别为36%，27%，25%和12%，总的多环芳烃。煤和生物质燃烧是南海沉积物中多环芳烃的主要来源，石油燃烧是珠江三角洲河流和河口沉积物中热解多环芳烃的主要来源。苝在河流沉积物中原位形成，然后与其他多环芳烃一起沿着迁移到沿海地区。五环多环芳烃中苝的相对丰度可以用来估算河流排放的多环芳烃对海岸带沉积物的贡献。
Polycyclic aromatic hydrocarbons (PAHs) were measured in 59 surface sediments from rivers in the Pearl River Delta and the northern continental shelf of the South China Sea. Total PAH concentrations varied from 138 to 6,793 ng/g dry weight. The sources of PAH inputs to sediments in the Pearl River Delta were qualitatively and quantitatively determined by diagnostic ratios and principal components analysis with multiple linear regression. The results showed that on average coal and wood combustion, petroleum spills, vehicle emissions, and nature sources contributed 36%, 27%, 25%, and 12% of total PAHs, respectively. Coal and biomass combustion was the main source of PAHs in sediments of the South China Sea, whereas petroleum combustion was the main source of pyrolytic PAHs in riverine and estuarine sediments of the Pearl River Delta. Perylene was formed in situ in river sediments and then transported to coastal areas along with other PAHs. The relative abundance of perylene from five-ring PAHs can be used to estimate the contribution of riverine-discharged PAHs to coastal sediments.