摘要
综合了中国大陆28个省土壤中天然放射性核素238U,226Ra,232Th和40K含量的调查结果,分析了这些天然放射性核素含量分布现状和及其分布规律,初步探讨了引起部分省份放射性核素含量偏高的主要原因。研究结果表明,中国28个省市土壤中放射性核素238U,226Ra,232Th和40K的含量按面积加权平均值分别为39.5,36.5,49.1和580.0Bq/kg;土壤中238U,226Ra,232Th的含量随地域的变化规律基本一致,40K含量随地域的分布规律则不显著。土壤中的天然放射性核素含量与成土母岩和铀资源分布有着明显的相关性。
The radionuelides content of ^238U, ^226Ra, ^232Th and ^40K in the soil of 28 provinces of China's Mainland are collected. The distribution situation and pattern of radionuclides are analyzed, and the reasons of radionu- clides with a high content in several provinces are discussed. Results show that the weighed mean by area of radio- nuclides ^238U, ^226Ra, ^232Th and ^40K in the soil of 28 provinces are 39.5,36.5,49.1 and 580.0 Bq/kg, respec- tively. The content of ^238U, ^226Ra, ^232Th is accordance with spatial differentiation, whereas ^40K presents no signifi- cant changes. In addition, the radionuclides show closely relationship with soil forming rock and distribution of u- ranium resources.
出处
《东华理工大学学报（自然科学版）》
CAS
2012年第2期167-172,共6页
Journal of East China University of Technology(Natural Science)
基金
国家自然科学基金项目(40774075)
江西省科技厅项目(2009BHA16100)
东华理工大学校长基金项目(DHXK1130)
