^(60)Co在水生生态系中的迁移富集和分布  

Transfer,Enrichment and Distribution of ^(60)Co in Aquatic Ecosystem

作　　者：赵希岳[1] 蔡志强[1] 王利群[1] 王寿祥[2] 

机构地区：[1]江苏工业学院化学工程系,江苏常州213016 [2]浙江大学原子核农业科学研究所农业部核农学重点开放实验室,浙江杭州310029

出　　处：《农业环境科学学报》2006年第6期1566-1570,共5页Journal of Agro-Environment Science

基　　金：国家自然科学基金资助项目(39570149);江苏省环境保护厅资助项目(2003076)

摘　　要：采用模拟污染物的同位素示踪技术研究了60Co在水生生态系中的迁移、消长和分配动态。结果表明,60Co进入水中后,在水生生态系中发生沉淀或与其他离子络合或被水生生物吸收或被吸附等形式在系统中迁移和转化,从而在系统各部分中分配和积累。在引入后的很短时间内,池水中60Co的比活度迅速降至一定值后缓慢下降;底泥通过与60Co进行离子交换,富集了大量的60Co;水葫芦也可在短期内吸附大量的60Co;螺蛳和鲫鱼对60Co的吸附能力较弱,螺蛳肉中60Co的富集率大于在壳中的富集率,60Co在鱼体内的分布主要集中在内脏中。60Co在系统各部分的量均受时间的影响。The dynamics of transportation, accumulation, disappearance and distribution of ^60Co in a simulated aquatic ecosystem was studied by isotope-tracer technique. When ^60Co was introduced into aquatic system, it was transported and transformed via depositing, chelating with other ions, adsorption and absorption by aquatic living things, which resulted in the distribution and accumulation in individual part of the living things. After introduction, the specific activity of ^60Co in the water decreased sharply to a certain value in a short time and then decreased slowly. The sediment accumulated a large amount of ^60Co by ion exchange. The water calabash could also adsorb a large amount of ^60Co in a short period of time. Snail and fish had a poor capacity of adsorbing ^60Co. The amount of ^60Co in the snail flesh was greater than that in the shell, and the distribution of ^60Co in the fish was mainly in the viscera. The amount of ^60Co in individual compartment in the system was affected by time.

关 键 词：^60CO 水生生态系统 迁移与分布 放射生态学 

分 类 号：X591[环境科学与工程—环境工程]