| 个旧地区环境中氡水平及其与地质特点的关系 |
| 摘要点击 748 全文点击 977 投稿时间：1994-10-17 |
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| 中文关键词 个旧地区 氡水平 环境调查 土壤 居室 地质特点 |
| 英文关键词 Gejiu area radon level soil indoor |
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| 中文摘要 |
| 为了研究个旧地区环境中氡的浓度及分布、运移规律,采用SSNTD方法,于1990—1992年间在个旧地区进行了氡的环境地质野外考察和土壤、居室内布点监测,共获479个数据。结果表明,尽管在个旧地区未发现铀、钍矿物,土壤氡水平普遍超过世界地壳土壤氡水平均值。居民室内氡水平均值高达471.9Bq·m-3,远高于我国部分省、市近年来所测氡水平值,位于断裂带的居室氡水平高于远离断裂带的居室。个旧地区室内氡夏季高,冬季低,与一些国内、外有关报道结果相反。氡水平与楼层高度呈正相关,顶层为底层的2.70倍。调查结果可能与个旧地区的环境地质因素有关。建议采取远离地质断裂带建房和防止上升气流逸入室内的防氡辐射进而防癌的措施。 |
| 英文摘要 |
| By using a SSNTD method, the study on the concentrations of radon and its distribution and transportation patterns in the regional environment of Ge itu was carried out, during the period of 1990—1992, through an environ-geological field survey and the soil and indoor monitoring at selected sites, with 479 data obtained. The results show that, although uranium or thorium ores had not Yet discovered in this area, the soil radon levels were generally higher than the world average of soil radon in the earth's crust. In the residential houses located on geological faults,there was an average indoor radon level of up to 471.9 Bq·m-3, much higher than the average radon level measured in some parts of this country in recent years. In contrast to the results reported in domestic and international literatures, the indoor radon levels in this area were higher in summer and lower in winter and were positively correlated to the number of building storeys, with the indoor radon level at a top storey being as much as 2.70 times that at a ground storey. This could be related to the environmental and geological factors in Gejiu area. It was suggested that the measures for preventing radon from causing acancer should be taken, including the construction of residential houses at a distance far away from the geological faults,and the prevention of ascending air streams with radon radiation from the escape into the residential rooms. |
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