Experimental study on release of heavy metals in sediment under hydrodynamic conditions

Abstract

In order to reveal the basic characteristics of the release of heavy metals in the sediment of the Nanchang section of the Middle Jiangxi River in the Poyang Lake River Basin, the experimental study was carried out. The release process of heavy metals Cu and Cd in the sediment under different hydrodynamic conditions was simulated by using the PES re suspension device. The results show that: 1) compared with the hydrostatic condition, the heavy metals in the sediment are more likely to migrate under the dynamic water conditions. The greater the disturbance shear stress is, the greater the heavy metal release is;2) the initial release rate is slower in the middle period than the latter; 3) the influence degree of the migration of heavy metals in the hydrodynamic condition is Cu > Cd.