大亚湾废物处置场中工程地球化学屏障的研究  

Study into Engineering Geochemistry Barrier in Dayawan Wastes Disposal Site

作　　者：连会青[1] 武强[1] 

机构地区：[1]中国矿业大学资源与安全工程学院,北京100083

出　　处：《中国矿业大学学报》2004年第5期563-568,共6页Journal of China University of Mining & Technology

基　　金：教育部跨世纪优秀人才基金项目(2000-3);教育部青年骨干教师基金项目(2000-65)

摘　　要：根据地球化学障原理,探讨了将人工工程地球化学屏障应用于广东大亚湾放射性废物处置场的可行性.针对当地“酸性-氧化”水土条件,以核素235U,60Co,90Sr为研究对象,进行了一系列静态模拟实验和动态淋滤柱模拟实验,测定了分配系数K、核素浓度随时间与迁移距离的变化,实验结果表明,Na2S作为主要添加剂建立的“碱性-还原”工程地球化学屏障,对阻滞核素235U,60Co,90Sr迁移非常有效,不仅能显著改善土体地球化学条件,而且能降低土体的渗透性能,人工工程地球化学屏障是一项经济、简便、实用的工程技术.Based on the principle of geochemistry barrier, the feasibility of artificial engineering geochemistry barrier is discussed which, has been applied in Dayawan radioactive wastes disposal site in Guangdong province China. According to the native water and soil condition of 'acidic-oxidation ', a series of static simulation experiments and dynamic filtering pole simulation experiments were carried out and the distribution coefficient (K) and concentration of nuclides were measured along with time and transference distance. The result shows that the 'alkalescence and deoxidation' engineering geochemistry barrier using Na2S as main additive can efficiently retard the nuclide transference, which can not only notably improve geochemistry conditions of soil but also greatly reduce permeability of soil. Artificial engineering geochemistry barrier is an economical, simple, and practical engineering technique.

关 键 词：地球化学屏障 大亚湾核电站 添加剂 核素迁移 模拟实验 

分 类 号：P641[天文地球—地质矿产勘探] TL3[天文地球—地质学]