Radiological risk assessment of outdoor 222Rn and 220Rn around rare earth element and uranium mines from northern Vietnam

被引：0

作者：

Hoang, Van-Hiep ^{[1
]}

Tue, Nguyen Tai ^{[2
,3
]}

Nguyen, Thai-Son ^{[4
]}

Quy, Tran Dang ^{[2
,3
]}

Nguyen, Thanh-Duong ^{[5
]}

Nguyen, Van-Dung ^{[5
]}

机构：

[1] Vietnam Natl Univ, VNU Sch Interdisciplinary Studies, Hanoi 100000, Vietnam

[2] Vietnam Natl Univ, Univ Sci, Key Lab Geoenvironm & Climate Change Response, Hanoi 100000, Vietnam

[3] Vietnam Natl Univ, Univ Sci, Fac Geol, Hanoi 100000, Vietnam

[4] Radioact & Rare Minerals Div, Hanoi 100000, Vietnam

[5] Hanoi Univ Min & Geol HUMG, Hanoi 100000, Vietnam

来源：

JOURNAL OF RADIOLOGICAL PROTECTION | 2023年 / 43卷 / 02期

关键词：

natural radionuclides; Rn-220 and Rn-222; radiological hazard; REE mines; uranium mines; northern Vietnam; RADON CONCENTRATION; SOIL-GAS; THORON; EXPOSURE; AIR;

D O I：

10.1088/1361-6498/acda43

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The outdoor Rn-222 and Rn-220 concentrations at 320 sampling points at 1 m above the ground in different sites surrounding rare earth element (REE) and uranium mines from northern Vietnam were measured using the RAD7. Results showed that Rn-222 concentrations were always higher than Rn-220 concentrations with large variation ranges from 25.7 to 573 Bq m(-3) and from 18.5 to 385 Bq m(-3), respectively. The high correlation between Rn-220 and Ra-228 concentrations in surface soil of the studied sites were observed. The highest Rn-220 and Rn-222 concentrations are found at the sampling points of the REE NX-Lai Chau site. The Rn-220 and Rn-222 activities surrounding the REE mines were found to be higher than those surrounding the uranium mines. The average annual committed effective doses originated from the inhalation of Rn-220 and Rn-222 outdoor concentrations is about five times higher than the worldwide average value.

引用

页数：7

共 38 条

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