Natural radioactive environment of urban soils in Shihezi, China

GE Benwei; LIU Anna

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Natural radioactive environment of urban soils in Shihezi, China

机译：石河子市城市土壤的自然放射性环境

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摘要

Radionuclides, such as 238U, 232Th and 40K, can be found in urban soil. To evaluate the natural radioactivity in the environment, soil samples were collected form Shihezi city and radioisotope concentrations were determined by X-ray fluorescence. The dose rate of urban soil (mGy per year, mGy/a) was calculated. The results indicate that the U, Th and K concentrations of the urban soils were, respectively, 1.2-3.2 mg/kg, 6.4-12.3 mg/kg and 2.05%-2.24%, with the mean values of 2.47 mg/kg, 10.47 mg/kg and 2.16 %. Dose rates of urban soils were 10.04-19.55 mGy/a with the mean value of 16.31 mGy/a. This dose rate is the perfect and maximum value of natural radiation in soil and different with the air absorbed dose rate from terrestrial γ-rays. The mean value of air absorbed dose rate was about 57.42 nGy/h. The annual effective dose rate in air was about 0.07 mSv/a and the average value of Raeq in urban soil was 120.37 Bq/kg. The relative contribution of α particle to the dose rate is higher than that derived from β- and γ-rays in the urban soils.

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《核技术：英文版》 |2009年第6期|P.335-339|共5页
作者
GE Benwei; LIU Anna;
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作者单位

College;

of;

Tourism;

and;

Environment,;

Shaanxi;

Normal;

University,;

Xi＇an,;

Shaanxi;

710062,;

China;

Department;

of;

Geography,;

Shihezi;

University,;

Shihezi,;

Xinjiang;

832000,;

China;

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原文格式 PDF
正文语种 CHI
中图分类土壤污染及其防治;
关键词
城市土壤; 放射性环境; 天然放射性; 石河子市; 中国; 放射性同位素; 剂量率; 放射性核素;

机译：城市土壤;放射性环境;天然放射性;石河子市;中国;放射性同位素;剂量率;放射性核素;

Natural radioactive environment of urban soils in Shihezi, China

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