珠江（广州河段）表层沉积物中重金属的粒度效应

摘要

Heavy metals and physical properties of sediment in the surface sediments in the Guangzhou section of the Pearl River were investigated. The granularity effect of heavy metals was discussed. The results show the following correlation between heavy metals and physical properties：negative correlations between heavy metals and sand fraction in a certain extent; obviously positive correlations between heavy metals and powder sand fraction; no significant correlation between heavy metals and clay fraction. The correlation between heavy metals and physical properties will enrich the content of granularity effect of pollutants in sediment.%测定了珠江（广州河段）表层沉积物中重金属元素的含量和粒径组成，对重金属元素的粒度效应进行了分析和研究。监测结果表明，各重金属元素与粒度组成之间有以下相关关系：（1）各重金属元素与砂之间表现出一定的负相关性；（2）各重金属元素与粉砂之间表现出较明显的正相关性；（3）各重金属元素与粘土之间不存在显著相关性。重金属与粒度组成之间的这种相关关系将丰富沉积物中污染物分布“粒度控制规律”的内容。