摘要
深埋地热水中放射性核素铀、镭、钾的含量决定了医疗热矿水的类别和用途。为探讨围岩介质中铀、镭、钾的析出特征,以寒武系灰岩为介质,进行了室内静态模拟实验,并分析了不同温度和时间对铀、镭、钾析出的影响。结果表明,温度是影响放射性核素^(238)U、^(226)Ra、^(40)K释放的重要因素,随着温度升高,水中放射性核素的含量显著增加;浸泡时间对40 K的影响较小,但对^(238)U的影响显著,呈现出快速释放和缓慢释放两个阶段。^(226)Ra的释放速度与元素初始含量密切相关,含量越高,释放越快,反之亦然。实验还发现,Ca^(2+)和SO^(2-)_(4)的增加促进了^(226)Ra的沉淀析出,而Cl-则有利于^(238)U的沉淀。总溶解固体(total dissolved solids,TDS)和电导率的增加有助于铀、镭、钾的析出,但pH的变化可能限制它们的析出。
The content of radioactive nuclides,such as uranium(^(238)U),radium(^(226)Ra),and potassium(^(40)K),in geothermal waters determines the classification and use of therapeutic thermal mineral waters.To investigate the precipitation characteristics of uranium,radium,and potassium in the surrounding rock medium,static laboratory experiments were conducted using Cambrian limestone as the medium.The effects of different temperatures and durations on the precipitation of these elements were analyzed.The results show that temperature is a significant factor influencing the release of radioactive nuclides^(238)U,^(226)Ra,and^(40)K.As the temperature increases,the concentrations of radioactive nuclides in the water increase significantly.The soaking time has little effect on the release of^(40)K but significantly influences^(238)U,which undergoes rapid and slow release phases.The release rate of^(226)Ra is closely related to the initial concentration of the element;the higher the concentration,the faster the release.The experiment also found that the increase of Ca^(2+)and SO^(2-)_(4)promoted the precipitation of^(226)Ra,while Cl-favored the precipitation of^(238)U.The increase in total dissolved solids(TDS)and conductivity facilitated the precipitation of uranium,radium,and potassium,while changes in pH may limit their precipitation.
作者
李洪彪
王子涵
王子才
张波
王心义
LI Hong-biao;WANG Zi-han;WANG Zi-cai;ZHANG Bo;WANG Xin-yi(Pingdingshan Tianan Coal Mining Co.,Ltd.,Pingdingshan 467000,China;School of Resources and Safety Engineering,Chongqing University,Chongqing 400044,China;Institute of Resources&Environment,Henan Polytechnic University,Jiaozuo 454000,China;Institute of Coal Mining and Utilization of China Pingmei Shenma Group,Pingdingshan 467000,China;State Key Laboratory of Coking Coal Resources Development and Comprehensive Utilization,Pingdingshan 467000,China;Collaborative Innovation Center of Coal Work Safety and Clean High-Efficiency Utilization,Jiaozuo 454100,China)
出处
《科学技术与工程》
北大核心
2025年第23期9693-9697,共5页
Science Technology and Engineering
基金
河南重点研发专项(251111322300)
国家自然科学基金(41972254)
河南省创新型科技人才队伍建设工程(CXTD2016053)。
关键词
寒武系灰岩
静态实验
环境温度
浸泡时间
Cambrian limestone
static experiment
ambient temperature
soaking time
作者简介
第一作者:李洪彪(1986-),男,汉族,河南柘城人,硕士,高级工程师。研究方向:矿井安全管理。E-mail:sdust_2020@126.com;通信作者:王心义(1963-),男,汉族,河南瞧县人,博士,教授。研究方向:矿井水文地质和地热水文地质。E-mail:wangxy@hpu.edu.cn。
