Department of Biology, Hong Kong Baptist University, Croucher Institute for Environmental Sciences, Kowloon Tong, Hong Kong, PR China.
Ecotoxicol Environ Saf. 2010 Jul;73(5):900-6. doi: 10.1016/j.ecoenv.2010.04.010. Epub 2010 May 7.
The distribution and source apportionment of polycyclic aromatic hydrocarbons (PAHs) in surface sediments of freshwater fishponds and mariculture rafts around the Pearl River Delta (PRD) were investigated. Twenty-one sample sites were chosen, consisting of fifteen freshwater fishponds and six mariculture rafts. The total PAH ( summation SigmaPAH) concentrations measured in all the sediment samples ranged from 52.7 to 717 ng g(-1), with mean of 184 ng g(-1). The marine sediment samples contained higher levels of summation SigmaPAH, high molecular weight (HMW) PAHs and carcinogenic PAHs than freshwater sediments (p<0.05). Principal component analysis/multiple linear regression analysis (PCA/MLRA) indicated that the source of PAHs in freshwater sediment was mainly derived from mixed combustion of coal, wood, and vehicle emission (66.2%). Vehicle emissions and coal combustion were the main sources (52.5 and 47.5% of summation SigmaPAH, respectively) of PAHs contaminated in the marine sediments. The present study indicated that surface sediments of freshwater fishponds and mariculture rafts around the PRD were grossly contaminated by PAHs derived from combustion sources.
本研究调查了珠江三角洲（PRD）周围淡水鱼塘和海水养殖筏表面沉积物中多环芳烃（PAHs）的分布和来源分配。选择了 21 个采样点，包括 15 个淡水鱼塘和 6 个海水养殖筏。所有沉积物样品中总多环芳烃（ΣPAH）浓度范围为 52.7 至 717ng/g，平均值为 184ng/g。海洋沉积物样品中ΣPAH、高分子量（HMW）PAHs 和致癌性 PAHs 的含量高于淡水沉积物（p<0.05）。主成分分析/多元线性回归分析（PCA/MLRA）表明，淡水沉积物中 PAHs 的来源主要来自煤、木材和车辆排放的混合燃烧（66.2%）。车辆排放和煤燃烧是海洋沉积物中污染 PAHs 的主要来源（ΣPAH 的 52.5%和 47.5%）。本研究表明，PRD 周围的淡水鱼塘和海水养殖筏的表层沉积物受到了来自燃烧源的多环芳烃的严重污染。
