Transference kinetics of ^(60)Co in an aquatic-terrestrial ecosystem  

作　　者：ZHAO Xiyue CAI Zhiqing GONG Fanghong SHI Jianjun WANG Shouxiang 

机构地区：[1]School of Chemistry and Chemical Engineering, Jiangsu Polytechnic University, Changzhou 213016, China [2]Institute of Nuclear Agricultural Sciences, Zhejiang University, Key Laboratory of Nuclear Agricultural Science, Ministry of Agriculture, Hangzhou 310029, China

出　　处：《Nuclear Science and Techniques》2008年第4期213-217,共5页核技术（英文）

基　　金：National Natural Science Foundation of China (39570149)

摘　　要：The dynamics of transportation,accumulation,disappearance and distribution of 60Co in a simulated aquatic-terrestrial ecosystem was studied by isotope-tracer technique. In the aquatic system,60Co was transported and transformed via depositing,coupling with ions and adsorption. The absorption resulted in the redistribution and accumulation of 60Co in each compartment of the system. Specific activities of 60Co in water started sharply and gently decreased. The sediment accumulated a large amount of 60Co by adsorption and ion exchange. The hornwort (Ceralophyllum demersum) could also adsorb a large amount of 60Co in a short time,because of its large specific surface area. Fish (Carassius auratus) and snail (Bellamya purificata) had a poor capacity of adsorbing 60Co. The distribution of 60Co in the fish was mainly in the viscera,and the amount of 60Co in the snail flesh was greater than that in the shell. The amount of 60Co in individual compartment in the system was changed with time. The highest specific activity of 60Co in the bean of the terrestrial system remained in the root nodule.The dynamics of transportation, accumulation, disappearance and distribution of 60Co in a simulated aquatic-terrestrial ecosystem was studied by isotope-tracer technique. In the aquatic system, 60Co was transported and transformed via depositing, coupling with ions and adsorption. The absorption resulted in the redistribution and accumulation of 60Co in each compartment of the system. Specific activities of 60Co in water started sharply and gently decreased. The sediment accumulated a large amount of 60Co by adsorption and ion exchange. The hornwort （Ceralophyllurn demersurn） could also adsorb a large amount of 60Co in a short time, because of its large specific surface area. Fish （Carassius auratus） and snail （Bellarnya purificata） had a poor capacity of adsorbing 60Co. The distribution of 60Co in the fish was mainly in the viscera, and the amount of 60Co in the snail flesh was greater than that in the shell. The amount of 60Co in individual compartment in the system was changed with time. The highest specific activity of 60Co in the bean of the terrestrial system remained in the root nodule.

关 键 词：土壤污染 化学技术 生态系统 动力学 

分 类 号：X131.3[环境科学与工程—环境科学] X591