研究论文
陈家军,张俊丽,李源新,黄乃明.大亚湾沉积物中137Cs纵向迁移研究[J].环境科学学报,2003,23(4):436-440
大亚湾沉积物中137Cs纵向迁移研究
- Study on vertical migration of 137Cs in marine sediment of Daya Bay
- 基金项目：广东省环境保护局科技攻关项目(粤环1999-31)
- 作者
- 单位
- 陈家军
- 北京师范大学环境科学研究所,环境模拟与污染控制国家重点联合实验室,北京 100875
- 张俊丽
- 北京师范大学环境科学研究所,环境模拟与污染控制国家重点联合实验室,北京 100875
- 李源新
- 广东省环境辐射研究监测中心,广州 510300
- 黄乃明
- 广东省环境辐射研究监测中心,广州 510300
- 摘要：鉴于海洋沉积物是137Cs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137Cs活度进行了模拟分析,对未来底质中137Cs的富集趋势进行了预测.
- Abstract：As a long-lived and critical artificial radionuclid, 137Cs 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 137Cs in marine environment. The study on vertical migration of 137Cs 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 137Cs versus the depth based on data of 4 samples of sediment cores, and the trend of 137Cs migration and accumulation in the future was predicted.
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