Simulation on release of heavy metals Cd and Pb in sediments
The re-release process and the release rate of heavy metals, cadmium and plumbum, which are rich in sediments of a certain water area, were investigated using a combined experimental and numerical method. Results show that the release law of Cd and Pb in sediments is divided into two stages: rapid release and dynamic equilibrium, which is in great agreement with the pseudo second-order kinetic equation with a correlation coefficient R2 above 0.99. As the flow velocity accelerates, the release rate of heavy metals increases. The analysis results indicate that the water quality in the area can exceed the surface water Class V standard less than 3 h, and all but one of the relative deviations between the simulation value and the field survey result are within 10％.
sedimentheavy metal pollutionre-release ratenumerical simulation
闫红杰、张河杨、史雅君、周萍、李欢、伍东玲、刘柳
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中南大学能源科学与工程学院,长沙 410083
中南大学冶金与环境学院,长沙 410083
长沙环境保护职业技术学院,长沙 410004
底泥 重金属污染 再释放率 数值模拟
authors are grateful for the financial supports from the National Key R&D Program of China
NETL
NSTL
万方数据
维普
