Luo Xiao-Jun, Chen She-Jun, Mai Bi-Xian, Sheng Guo-Ying, Fu Jia-Mo, Zeng Eddy Y
Laboratory of Organic Geochemistry, Guangzhou Institute of Geochemistry, Chinese Academy of Sciences, P.O. Box 1131, Guangzhou, 510640, China.
Arch Environ Contam Toxicol. 2008 Jul;55(1):11-20. doi: 10.1007/s00244-007-9105-2. Epub 2008 Jan 3.
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.
对珠江三角洲河流及南海北部大陆架的59个表层沉积物样本中的多环芳烃（PAHs）进行了测定。总PAH浓度在138至6793纳克/克干重之间。通过诊断比率以及主成分分析与多元线性回归，对珠江三角洲沉积物中PAH输入的来源进行了定性和定量测定。结果表明，平均而言，煤炭和木材燃烧、石油泄漏、车辆排放以及自然源分别占总PAHs的36%、27%、25%和12%。煤炭和生物质燃烧是南海沉积物中PAHs的主要来源，而石油燃烧是珠江三角洲河流和河口沉积物中热解PAHs的主要来源。苝在河流沉积物中就地形成，然后与其他PAHs一起输送到沿海地区。五环PAHs中苝的相对丰度可用于估算河流排放PAHs对沿海沉积物的贡献。
