辽东湾北部浅海区底泥镉元素形态特征

依据辽东湾浅海区底泥的52件样品中镉元素全量和各形态的测试数据，研究了镉元素存在形态的分布特征和相关性，并探讨了底泥镉形态的环境因素和生态效应.结果表明，底泥中的镉含量为较高水平，非残渣态含量极高，占总量的90%.非残渣态镉主要为离子交换态（44.38%）和碳酸盐结合态（21.38%）.镉的全量与各种形态都有极显著的相关性，并且分布特征一致，最高样点都分布在锦州湾.底泥镉的各种形态与底泥的有机质和海水环境中镉存在显著的相关性.底泥的离子交换态镉与脉红螺的镉有正相关关系.

STATE CHARACTERISTICS OF CADMIUM IN BOTTOM MUD OF SHALLOW SEA OF NORTHERN LIAODONG BAY

Based on the analysis data of 52 samples for cadmium content of both total and each state in bottom mud of shallow sea of the Northern Liaodong Bay,the distribution characteristics of cadmium in different existing states are researched.The environmental factors and ecologic effect of the cadmium in bottom mud are also studied.The result indicates that the cadmium content in bottom mud is relatively high.The cadmium content of non-residual state,mainly ion-exchange state and carbonate-binding state,is very high,accounting for 90% of the total.There is a notable correlation between the total content and each states of cadmium,with consistent distribution characteristics.The samples with highest content are concentrated at Jinzhou Bay.Each state of cadmium in bottom mud is notably correlated with the organic matter in bottom mud and the cadmium in sea water.