Heavy metal pollution and spatial distribution in Surface Water and Sediment of Nanchang Section of Ganjiang River

Abstract In order to reveal the spatial distribution and pollution characteristics of heavy metals in surface water and sediment of Nanchang section of GanJiang River in JiangXi Province, potential ecological hazard index method and ground accumulation index method were used to evaluate the risk of heavy metals. The results show that: 1) The concentration of heavy metals in surface water of GanJiang River is much lower than the first standard limit of “Surface Water Environmental Quality Standard GB3838-2002”. 2) The average RI value of sediment in Nanchang section of GanJiang River is 144.21, and the total ecological risk level is very high. The RI of two sections of Bayi Bridge are 169.89 and 192.38, respectively, which have become potential ecological high-risk areas. 3) According to the method of accumulative index, the pollution degree of heavy metals in GanJiang River is as follows: Cu > Cd > Pb > As > Cr > Zn. Among them, Cu and Cd are the main pollutants. Relevant departments should take urgent measures to strengthen the environmental management and pollution control of GanJiang River.