大亚湾沉积物中^(137)Cs纵向迁移研究  

Study on vertical migration of ^(137)Cs in marine sediment of Daya Bay

作　　者：陈家军[1] 张俊丽[1] 李源新[2] 黄乃明[2] 

机构地区：[1]北京师范大学环境科学研究所 [2]广东省环境辐射研究监测中心,广州510300

出　　处：《环境科学学报》2003年第4期436-440,共5页Acta Scientiae Circumstantiae

基　　金：广东省环境保护局科技攻关项目 (粤环 1999 31)

摘　　要：鉴于海洋沉积物是13 7Cs在海域内迁移的最终归宿 .建立了沉积物中污染物纵向迁移分布的定量模型 ,在机理分析中充分考虑了海水 表层沉积物界面上通过沉降、扩散、吸附 解吸等作用完成的物质传输 ,并对大亚湾内 4个监测点底质芯样中13 7Cs活度进行了模拟分析 ,对未来底质中13As a long\|lived and critical artificial radionuclid, 137 Cs from GNPS(Guangdong Nuclear Power Station) plays an important role in the study of monitoring and assessing marine radioactivity in Daya Bay. Marine sediment is the final repository for 137 Cs in marine environment. The study on vertical migration of 137 Cs in marine sediment is important to make proper assessment for radionuclides impact on Daya Bay from GNPS. A quantitative vertical migration model for radionuclides in sediment presented in the paper. The mechanism of transport happened in the sediment\|water interface through sedimentation, diffusion and sorption\|desorption, etc. is taken into account comprehensively. The modeling analysis was conducted on the migration and distribution of 137 Cs versus the depth based on data of 4 samples of sediment cores, and the trend of 137 Cs migration and accumulation in the future was predicted.

关 键 词：大亚湾 沉积物 ^137CS 纵向迁移 海洋 放射性污染物 

分 类 号：X771[环境科学与工程—环境工程] X55