我国内陆流域各类水体中天然放射性核素浓度

1985年～1989年由新疆、甘肃、青海、西藏、内蒙古、陕西、宁夏等省、自治区环境监测站(研究所)对内陆流域各类水体中U、Th、~(226)Ra、~(40)K浓度进行调查,由调查的29条内陆河、23个湖泊、15座水库、55处井泉和34个自来水的统计结果表明,流域内各水体中U和~(40)K浓度的平均值与同期调查的黄河水系同类水体的浓度相近,明显高于长江水系,与全国同类水体相比亦属偏高。Th和~(226)Ra的平均浓度与全国同类水体的浓度相近,甘、新内陆区浓度较低。调查发现,一些咸水湖、井水和自来水中U、~(226)Ra,或~(40)K浓度异常偏高。

CONCENTRATIONS OF NATURAL RADIOELEMENTS OF THE VARIOUS CONTINENTAL WATERS OF CHINA

The concentration of U, Th, 226Ra and 40K of 29 continental rivers, 23 lakes, 15 reservoirs, 55 well waters and springs and 34 tap water samples wrer examined in 1985-1989 by the environmental monitoring centres or research institutes of environmental protection of Xinjiang, Gansu, Qiuhai, Tibet, Inner Mongolia, Shanxi and Ningxia. The statistical analysis showed that the average concentrations of U and 40K wrer close to those of the water of the same kind of Huanghe River system in the same period but obviously higher than those of Zhangjiang River system as well as slightly higher than those of the same kind of all the country. The average concentrations of Th and 226Ra were close to the waters of the same kind of all the country and lower in Gansu-Xinjiang region. The concentrations of U, 226Ra and 40K of some saltwater lakes, well waters and tap waters were much higher.