深圳妈湾电厂周边土壤天然放射性水平研究  

Natural Radionuclide in Soil around Shenzhen Mawan Power Plant

作　　者：刘国卿[1] 罗奇[1] 许政博 冯江平 张鸿[1] 童永彭[1] 孙慧斌[1] 

机构地区：[1]深圳大学核技术应用研究所,广东深圳518060 [2]深圳市环境监测中心站,广东深圳518039

出　　处：《环境科学与技术》2014年第1期56-59,共4页Environmental Science & Technology

基　　金：国家自然科学基金项目(41102217;11275130);深圳市科技研发资金项目(JC201005280560A)

摘　　要：研究分析了深圳妈湾电厂周边土壤中天然放射性核素226Ra、232Th、40K的含量分布。妈湾电厂周边土壤天然放射性核素226Ra、232Yh、40K的含量分别为72—358Bq／kg（平均204Bq／kg）、118-432Bq／kg（平均265Bq／kg）和101-2168Bq／kg（平均1269Bq／kg）。燃煤电厂的长期运行使周边环境的天然辐射水平有一定程度的增加，其影响程度在电厂4km范围内显现明显。放射性核素在土壤A层（0～15cm）的比活度普遍低于B层（15～30cm），可能源于土壤的渗透作用以及植物对其的吸收。妈湾电厂周边土壤天然放射性核素的含量显著高于国内其他燃煤电厂，这主要是因为深圳位于我国天然放射性的高本底地区。妈湾电厂周边土壤等效镭浓度范围为346-878Bq／kg，多数超出等效镭浓度的最大允许值370Bq／kg。Soil samples around Shenzhen Mawan Power Plant（MPP） were analyzed for natural radionuclide. The concentration of 226Ra, 232Th and 40K in the soils ranged from 72-358 Bq/kg （averaged 204 Bq/kg）, 118-432 Bq/kg （averaged 265 Bq/kg） and 101-2 168 Bq/kg （averaged 1 269 Bq/kg） respectively. The operating of coal-fired power plants has caused increment in natural radionuclide concentration in the surrounding environment, which was observable within 4 kilometers from the power plant. The contents of radionuclide in soil profile A （0~15 cm） were relatively lower than those in profile B（15-30 cm）, which might caused by soil infiltration and plant adsorption. With respect to the high background radiation, the natural radioactivity in soil around MPP was much higher than those found in soil near other coal fire power plants. The Raeq values for the soil samples around MPP ranged from 346 to 878 Bq/kg, most of which exceeded the allowed maximum Raeq value of 370 Bq/kg.

关 键 词：燃煤电厂 土壤 天然放射性 深圳 

分 类 号：X131.3[环境科学与工程—环境科学]