| 青岛市地表伽玛辐射特征及环境影响评价 |
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| 引用本文： | 代杰瑞,鲁峰,庞绪贵,杨恩秀.青岛市地表伽玛辐射特征及环境影响评价[J].世界地质,2012,31(4):831-840. |
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| 作者姓名： | 代杰瑞 鲁峰 庞绪贵 杨恩秀 |
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| 作者单位： | 1. 山东省地质调查院，济南250013; 2. 山东省第一地质矿产勘查院，济南250014 |
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| 基金项目： | 山东省地质勘查项目"山东省东部地区农业生态地球化学调查" |
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| 摘 要： | 对青岛市1 500 km 2范围内大密度土壤放射性核素和地表γ 辐射测量，系统深入研究了其放射性特征、分布规律及其影响因素。结果表明，青岛市土壤中核素232 Th 和40 K 的放射性比活度偏高，而238U 偏低。地表γ 辐射剂量率( 平均值91. 87 nGy /h) 略高于全国和世界平均值。研究发现，地表 93. 14%的γ 辐射来自地面放射性核素238U、232 Th 和40K 的γ 辐射，其中232 Th 和40K 的贡献占81. 21%，是主要的贡献者。地质背景决定地面γ 辐射剂量率值，燕山期各类花岗岩是导致青岛市区-王哥庄一带γ 辐射剂量率偏高的主要原因; 同时环境因素( 路面材料、地貌景观) 对其剂量率也存在一定影响。虽然研究区的γ 辐射剂量率较高，但其年有效剂量( 0. 56 mSv) 低于公众照射年剂量当量限值 ( 1. 0 mSv) ，人居环境基本不受影响。
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| 关 键 词： | 天然放射性 土壤放射性核素 γ辐射剂量率 年有效剂量当量 青岛 |
Characteristics and environmental impact assessment of gamma radiation in Qingdao City |
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| DAI Jie-rui
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LU Feng
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PANG Xu-gui
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YANG En-xiu.Characteristics and environmental impact assessment of gamma radiation in Qingdao City[J].World Geology,2012,31(4):831-840. |
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| Authors: | DAI Jie-rui LU Feng PANG Xu-gui YANG En-xiu |
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| Institution: | 1. Shandong Institute of Geological Survey，Jinan 250013，China; 2. No. 1 Institute of Geological and Mineral Resources Survey of Shandong Province，Jinan 250014，China |
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| Abstract: | Based on a large density measurements of soil including radionuclides and surface gamma radiation within 1 500 km2 in Qingdao City，a systematic in-depth study of its radioactive characteristics，distribution and influencing factors were conducted． The results revealed that the radioactive of nuclides232Th and 40 K in soils of Qingdao City were with higher specific activity，while 238U was low． Surface gamma radiation dose rate ( 91. 87 nGy /h) was slightly higher than the national and world wide mean values． The study found that 93. 14% of the surface gamma radiation comes from radionuclides 238U，232Th and 40K，in which the 232Th and 40K were the main radioactive elements accounted for 81. 21% of the contribution． The geological background was the main factor which effected the gamma radiation dose rate of the surface soil，like the high gamma radiation from Qingdao to Wanggezhuang area could be mainly attributed to the various types of granite and fault structure of Yanshannian，in the meantime， environmental factors ( paving，landscape，etc． ) contributed the gamma radiation dose rate in a certain level． Although the gamma radiation dose rate in the studied area is higher，the annual effective dose ( 0. 56 mSv) is far below the public exposure dose limits 1. 0 mSv，which is basically not harmful for the living environment． |
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| Keywords: | natural radioactivity soil radionuclides gamma radiation dose rate annual effective dose Qingdao |
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