辽东湾北部浅海沉积物铅地球化学评价

依据对辽东湾北部表层沉积物样品化验结果，分析了工作区浅海铅元素分布特征，并探讨其环境生态效应.结果表明：辽东湾北部浅海沉积物中铅含量13.9×10^-6~344×10^-6，平均含量28.4×10^-6.存在形态主要为残渣态、铁锰氧化态和碳酸盐结合态.分布特点为西高东低，异常突出并且集中分布于锦州湾西南部.异常源主要为锌厂排污，及其他工业生产的污水、烟尘排放所致.该异常区的环境质量属三类及超三类沉积物，面积约12 km²，占研究区总面积的0.36%.通过与生物效应数据库法导出的沉积物质量基准值（ERL/ERM和TEL/PEL）的比较，锦州湾有3件样品铅的潜在生物毒性较大，不利生物效应可能频繁发生.

GEOCHEMICAL EVALUATION OF LEAD IN THE NERITIC SEDIMENTS OF NORTHERN LIAODONG BAY

Based on the test of surface sediment samples from northern Liaodong Bay, the paper discusses the distribution characteristics of Pb in shallow water and its environmental ecological effects. The results show that Pb in the neritic sediments is 13.9×10^-6-344×10^-6 (averagely 28.4×10^-6), mainly existing in residual form, Fe-Mn oxidation form and carbonate bounded form. High in the west and low in the east in terms of distribution, the anomaly is obvious and concentrated in the southwest of Jinzhou Bay. The anomaly sources are mainly composed of pollution discharge from zinc plant and sewage and soot emissions from other industries. The environmental quality of the anomaly area belongs to Class III and III+ sediments, covering an area about 12 km², accounting for 0.36% of the total study area. By comparison with the sediment quality baseline values (ERL/ERM and TEL/PEL) derived by the biological effect database method, the potential biological toxicity of Pb in three samples from Jinzhou Bay is relatively high, and adverse biological effects may occur frequently.