中文摘要：

采用等离子体发射光谱法、冷原子吸收法、原子荧光光谱法及灼烧法测定了连云港海州湾近岸表层沉积物中重金属和有机质的含量,利用主成分分析法（Principal Component Analysis,PCA）研究了沉积物中重金属的来源,发现前3个主成分的贡献率分别为54.21%、19.04%、16.37%,表明重金属主要有3个来源：工业和生活污水排放、农业灌溉水的排放、有机质降解。以PCA计算结果为基础应用海洋沉积物污染指数（Marine sediment pollution index,MSPI）和平均沉积物质量标准商数（Mean sediment quality guideline quotient,SQG-Q）评价了沉积物中重金属的污染状况及对生物的潜在影响。结果发现,海州湾近岸海区沉积物质量污染严重（MSPI值在60到80之间）,排污口海区的沉积物污染最为严重（MSPI值大于80）,连云港近岸海域沉积物对生物的负影响潜力为中度水平（0.1〈SQG-Q〈1）。

英文摘要：

Concentrations of heavy metals and organic matters in the surface sediments of Haizhou Bay were determined by inductively coupled plasma-atomic emissionspectrometry, atomic fluorescence spectroscopy, cold atomic absorbent spectrophotometry and ignition method. Principal component analysis （PCA） was applied to estimate the sources of heavy metal contamination. Results showed that the three major sources of heavy metal contamination were coming from industrial wastewater, agricultural wastewater and degradation of organic matter. They accounted for 54.21%, 19.04%, and 16.37% of the total variance, respectively. The heavy metal contamination level and the potential for adverse biological effects were determined utilizing the data from PCA, the marine sediment pollution index, and the mean sediment quality guideline quotient. Results showed that the sediment conditions are poor （MSPI：60—80）, especially in outlet （MSPI： 80） and Haizhou Bay, has a moderate potential for observing adverse biological effects.