庐江地热温泉区活动断裂土壤气氡(Rn)释放对环境的影响  

Environment impact of Rn degassing from soil gas in the active faults of the area of Lujiang hot spring

作　　者：方震[1,2] 张彬 李军辉[1] 缪鹏[1] 汪世仙[4] FANG Zhen;ZHANG Bin;LI Junhui;MIAO Peng;WANG Shixian(Anhui Earthquake Agency,Hefei,230031,China;Mengcheng National Geophysical Observatory,Mengcheng,233500,China;Key Laboratory of Crustal Dynamics,Institute of Crustal Dynamics,China Earthquake Administration,Beijing,100085,China;Lujiang Seismic Station,Lujiang,231511,China)

机构地区：[1]安徽省地震局,合肥230031 [2]蒙城地球物理国家野外科学观测研究站,蒙城233500 [3]中国地震局地壳应力研究所(地壳动力学重点实验室),北京100085 [4]庐江地震台,庐江231511

出　　处：《环境化学》2019年第8期1906-1911,共6页Environmental Chemistry

基　　金：国家自然科学基金(41404036);星火计划项目(XH17016,XH18021Y)资助~~

摘　　要：在庐江地热温泉区活动断裂带上布置了3个跨断层土壤气氡(Rn)测区,测点共205个.测量结果表明,舒茶、汤池测区土壤气Rn浓度背景值达到30-50kBq·m^-3,柯坦测区土壤气Rn浓度背景值高于国家标准50kBq·m^-3,氡气浓度最高值出现在断裂附近,土壤气Rn的释放强度与断裂的规模大小有关,受区域地质环境影响,温泉出露点附近,土壤气Rn的释放强度较大.土壤气Rn是大气中氡气的主要来源,大气中氡气超标将危害生态环境和人体健康,加强大气氡气的来源与释放特征的研究对大气环境中氡气的防护与治理具有重要意义.Rn in soil gas was measured in three testing sites across the active faults in the Lujiang area where hot springs formed.In total,there were 205 observation points.The background soil gas Rn concentration was 30-50 kBq·m^-3 in Shucha and Tangchi testing sites,and the value in Ketang testing sites was higher than the national standard 50 kBq·m^-3.The peak Rn concentrations emerge close to the fault zone,and the intensity of the Rn concentrations is related to the scale of the faults.In addition,the Rn concentrations are affected by the regional geological environment,and the release intensity of Rn in soil gas was larger near the hot spring.Rn in soil gas was the main source of Rn in the atmosphere,Rn exceeding the national standard in the atmosphere would endanger the ecological environment and human health.It is of great significance to analyze the source and release characteristics of the Rn in the atmosphere.

关 键 词：土壤气 氡气 温泉 断裂 环境 

分 类 号：X591[环境科学与工程—环境工程]