论文部分内容阅读
本文根据广州市番禺区龙湾涌沉积物重金属的调查结果，分析了沉积物重金属含量的空间分布，表明龙湾涌沉积物重金属含量沿河分布的差异与水流速度、工业排污位置有关。采用重金属潜在生态危害指数法评价了龙湾涌重金属对水生态系统的潜在危害。结果表明：产生生态危害的主要重金属污染物为Hg；其次为Cd、Cu、Pb、Cr、Zn。污染最严重断面是龙湾闸口。龙湾涌重金属潜在污染除龙湾闸口沉积物Cd属中等生态危害外，龙湾涌生态危害属于轻微。
According to the survey results of sediment heavy metals in Longwan Chung of Panyu District, Guangzhou City, the spatial distribution of heavy metals in sediments is analyzed. The results show that the distribution of heavy metals along Longhe River sediments is related to water velocity and industrial discharge. Potential ecological risk index of heavy metals was used to evaluate the potential hazard of heavy metals to aquatic ecosystem in Longwan. The results showed that the main heavy metal pollutants that produce ecological hazards were Hg, followed by Cd, Cu, Pb, Cr and Zn. The most polluted section is the Longwan gate. Potentially polluted heavy metals in Longwan Bay Longwan Chung belongs to the minor ecological hazard except that the Cd in the sediments at Longwan Gate is a moderate ecological hazard.