巢湖十五里河河流沉积物地球化学元素分布特征

Distribution Characteristics of Geochemical Elements in River Sediments of Shiwuli River in Chaohu Lake

十五里河是巢湖流域污染最严重的城市河道,其河流沉积物中的地球化学元素对水体环境分析有重要意义。对十五里河沉积物进行采样,并对其沉积物中的化学元素分布特征进行分析,发现大部分元素的空间分布主要受到母质作用的影响,与河流上下游并无明显相关性;CaO、Nb等元素及化合物的分布特征受到河流作用影响;受人类活动污染和元素迁移性的影响,部分元素含量存在异常升高。

The Shiwuli River is the most polluted urban river in the Chaohu Lake basin,and the geochemical elements in its river sediments are of great significance to the analysis of the water environment.In this paper,the sediment of Shiwuli River was sampled,and the distribution characteristics of the chemical element were analyzed.It was found that the spatial distribution of most elements was mainly affected by the action of parent material,and had no obvious correlation with the upper and lower reaches of the river;the distribution of elements such as CaO and Nb was affected by fluvial processes;the contents of some elements were abnormally increased due to the pollution of human activities and the migration of elements.