摘要
本文报道了在实验室条件,对厦门东渡港和筼筜湖疏浚物海洋倾废后Cd的溶出,及已达溶出平衡的疏浚物对天然海水中Cd再吸附的模拟研究的结果,讨论了溶出与再吸附过程所遵循的动力学规律。
In order to seek the behaviours of Cd in ocean dumped dredged materials from harbour. The release and re-adsorption kinetics of Cd in seawater has been studied in simulated laboratorial conditions. The results show that (1)Cd is released from dredged materials of Dongdu Harbour into seawater, with a release ratio of 40%～60% and a re-adsorption rate of 10%～15% ,implying that Cd may transfer in marine environment mostly as dissolve species. The potential recontamination of Cd should be considered seriously during marine dumping operation of dredged materials; (2)There is a significant positive correlation between the release and re-adsorption of Cd for dredged materials and the organic carbon,indicating that behaviours of Cd in marine environment may be controlled by organic matters;(3) It has been demonstrated that the exchange-adsorption kinetic model of solid-liquid interface proposed by the authors can be used to study the kinetic processes of release and re-adsorption of heavy metals from dredged materials.
出处
《台湾海峡》
CAS
CSCD
1990年第4期316-322,共7页
Journal of Oceanography In Taiwan Strait
基金
福建省自然科学基金
关键词
海洋
倾废
镉
化学行为
模拟
Dredged material,Cd,kinetics,simulated investigation
