稀土元素在水体食物链生物中迁移的摸拟研究

本文用动态和静态摸拟系统分别研究了稀土元素在小球藻-大型溞-鲤鱼食物链生物上的迁移。结果表明:水生生物对稀土的生物积累作用有从水体直接摄取和从食物间接摄取两种方式,但稀土元素在该食物链上无生物放大作用,生物体中积累的稀土量和水环境中残余的稀土浓度从轻稀土向重稀土递减,稀土元素在水环境中迁移的最重要形式可能是物理-化学迁移。

SIMULATION STUDY ON TRANSPORT OF RARE EARTH ELEMENTS ALONG AN AQUATIC FOOD CHAIN

A dynamic and a static simulated system was employed to evaluate transport of rare earth elements (REEs) along an aquatic food chain consisted of green alga.e(Chlorella Pyrenoidosa), crustacean (Daphma, magna S. )and fish (Cypriwus carpio L. ).The results indicated that aquatic organisms in the simulated systems could take up REEs both from abiotic madium and food. Nevertheless, no biomagnification process was found to take place. The amount in organism and remaining concentration of REEs in medium decreased from light to heavy REEs, It was also discovered that physico-chemical transport may play a dominating role on the transport of REEs in aquatic environment.