合肥市城市水体氮磷及微量元素时空分布特征

Temporal and Spatial Distribution Characteristics of Nitrogen,Phosphorus and Trace Elements in Urban Water Bodies of Hefei City

选取翡翠湖、环城河、董铺水库的表层水样和沉积物进行研究,测量表层水体中TN、TP、CODcr、Fe、Mn、Zn、Cu、Mo及沉积物中的上述五种微量元素含量。结果表明:翡翠湖水体水质处于Ⅳ类水,环城河南岸水体水质处于Ⅴ类水,董铺水库水体水质处于Ⅲ类水。翡翠湖水体五种微量元素浓度处于三个水体中最高值,且南岸水体TN、TP浓度较北岸低,董铺水库水体则相反,环城河西部水体TN、TP浓度较东部水体低。三种水体TN浓度在采样期间均呈下降趋势,而TP浓度呈上升趋势,五种微量元素浓度在采样期间均呈稳定趋势,且各个水体不同采样点之间微量元素浓度变化不大。

The surface water and sediment samples of Feicui lake, Huancheng River and Dongpu reservoir were selected to study, The contents of TN, TP, CODCr, Fe, Mn, Zn, Cu and Mo in the surface water and sediment were measured. The results showed that the water quality of Feicui lake was in class IV, that of the south bank of Huancheng river was in class V, and that of Dongpu reservoir was in class Ⅲ. The concentrations of five trace elements in Feicui lake were the highest among the three water bodies, and the concentrations of TN and TP in the south bank are lower than those in the north bank, while in Dongpu reservoir, on the contrary, the concentrations of TN and TP in the west of Huancheng River are lower than those in the east. The concentrations of TN in three kinds of water bodies showed a downward trend during the sampling period, while the concentrations of TP showed an upward trend. The concentrations of five trace elements showed a stable trend during the sampling period, and there was little change in the concentrations of trace elements between different sampling points.