锦州港疏浚沉积物中重金属的吸附和解吸

Adsorption and desorption of heavy metals in the Jinzhou port sediment

通过实验室内海水浸放疏浚沉积物的静态和动态模拟实验,探讨了锦州港沉积底泥中重金属的解吸和吸附.用葫芦岛市五里河沉积物中的金属做了对比实验,进一步研究了海洋沉积物-海水间重金属交换作用,在海流的运动下,重金属对上覆水释放和构成对海洋环境的影响.港区疏浚物溶出过程中水体的极限释放浓度和平衡后浓度均未超过一类海水标准,没有造成对海水的污染问题,而五里河沉积物已形成对海水的二次污染,因此已污染的疏浚物在海洋倾倒时会造成新的环境污染问题.

This paper discusses the adsorption and desorption of heavy metals at Jinzhou port sediment via the static and dynamic experiments of sediment which dip in seawater in the lab, and it is important to know the pollution problem of heavy metals in seawater. Using the heavy metals in Wuli river sediment of Huludao city as the parallel experiment, we make a study of the transportation of heavy metals deeply at seawater-sediment interface. And at the effect of ocean current, the release of heavy metals for interstitial water affects the sea environment. The concentrations of limited release and equilibrium are both under the first seawater standard when sediment desorb. But the sediment of Wuli River has became secondary pollution for water and will be a new problem of environment contamination.