洞庭湖流域某些水库、泉水和自然保护区环境水内的铀水平

URANIUM LEVEL OF SOME RtSERVOIRS, SPRINGS AND NATURAL PROTECTIVE AREA AT DONGTING LAKE VALLEY

一、前言 水库水,泉水,河水和大气降水等这些环境水与人类生活有着密切关系。水中天然放射性铀水平的研究因其化学毒性和放射性的双重危害是有实际意义的。洞庭湖流域处于我国亚热带湿润气候区,雨量充沛,矿产及水资源十分丰富。过去几年已对洞庭湖流域247000km^2湘、资、沅、澧各水系铀的水环境背景值,湘江的放射性水平和湘江流域大气降水中的痕量铀进行了研究。

In our work uranium contents in the filtered and nnfiltered specimens of some reservoir water, spring water and water from natural protective area at Dongting lake valley were measured by fission track analytical technique.Ranges of uranium contents of the reservoir (42 specimens from 10 reservoirs), spring (13 specimens from 12 springs) and natural protective area (14 specimens from 10 sections)are 0.09-2.07,0.005-1.08 and 0.005-0.32μg·/1-1 respectively. The experimental results have been discussed briefly in the light of geographical environment and compared with those previously published.