【摘要】 本文模拟研究了疏浚沉积物中Cd的释放行为和影响条件。结果表明介质的盐度、pH、氧化还原状态等环境条件和疏浚沉积物的污染程度、粒度大小、有机质含量等理化特征对Cd的释放有明显的影响。Cd从疏浚物中释放 ,其释放速率较快 ,释放率在 40 %～ 96 %之间。疏浚物的海上倾弃可能引起Cd的污染和对部分生态环境的危害。同时还讨论了Cd的释放所遵循的动力学规律。更多还原

【Abstract】 The release behaviors and influence conditions of Cd in dredged sediments have been simulated. The results show that the environment conditions with salinity, pH and oxidation reduction state and the physical chemical characteristics of dredged sediments with polluted extent, grain size and content of organic matter have evident influence on release of Cd in dredged sediments, and the rate of release of Cd from dredged sediment to seawater is faster, with a release ratio of 40%～96%. Its release from the dredged sediments disposed in the ocean may cause pollution of Cd; and be harm ful to the ecosystem of organism habits. It has been demonstrated that the exchange adsorption kinetic model of solid liquid interface proposed by the authors can be used to explain the release behaviors of heavy metals from dredged material and to treat the release kinetics of Cd.更多还原