衡阳特定水域中^(226)Ra、^(210)Pb和^(210)Po比活度及平衡性测定

The Specific Activity and Balance's Measuring of ^(226)Ra,^(210)Pb and ^(210)Po in Hengyang Specific Water Environment

对湘江衡阳段四条主要支流及湘江上游一退役铜矿水环境中^(226)Ra、^(210)Pb、^(210)Po进行了研究分析。结果表明,样品对应的衡阳地区湘江四大支流^(226)Ra、^(210)Pb、^(210)Po比活度范围分别为4.8~43.3 m Bq/L、9.6~26.5 m Bq/L和1~5 m Bq/L,其中舂陵水、蒸水样点值偏高,丰水期测量值普遍高于枯水期;退役铜矿区域水环境中^(226)Ra、^(210)Pb和^(210)Po比活度范围分别为3~68.5 m Bq/L、17~33.6 m Bq/L、2.3~8.8 m Bq/L,尾矿渗出水经小溪和小河稀释后,与湘江值相当。所测水域中,总体^(210)Pb相对^(226)Ra呈现出过剩现象;^(210)Po/^(210)Pb比值范围为0.098~0.283,与雨水中比值相符。

The results show that the corresponding sample＇s concentration respectively are 4. 8 - 43.3 mBq/L,9. 6-26. 5 mBq/L and 1 -5 mBq/L in the four major tributaries on Hengyang section of Xiang river. The level of Chongling River and Zheng River are relatively higher, and the values in wet season are are 3 - 68. exit could generally higher 5 mBq/L, 17-3 than dry season. The radioactivity ratio ranges in the retired copper mine area 3.6 mBq/L and 2. 3- 8.8 mBq/L. The levels in the tailing effusion drainage be the same as the value of Xiang River after brooks flew over. The value of 210Pb excessive than 226Ra, while the ratio ranges less than 210Pb and the ratio is equal to the of 210Po/210Pb are 0. 098-0. 283, which shows that rainwater. is more 210Ppo is