Working Paper Article Version 1 This version is not peer-reviewed

Estimation of Annual Effective Dose Due to Ingestion of 210Pb and 210Po in Crops from A Site of Coal Mining and Processing in Southwest China

Version 1 : Received: 24 August 2021 / Approved: 25 August 2021 / Online: 25 August 2021 (14:55:03 CEST)

How to cite: Wang, C.; Wu, Q.; Pan, Z.; Liu, S.; Cao, Z.; Yu, Y. Estimation of Annual Effective Dose Due to Ingestion of 210Pb and 210Po in Crops from A Site of Coal Mining and Processing in Southwest China. Preprints 2021, 2021080495 Wang, C.; Wu, Q.; Pan, Z.; Liu, S.; Cao, Z.; Yu, Y. Estimation of Annual Effective Dose Due to Ingestion of 210Pb and 210Po in Crops from A Site of Coal Mining and Processing in Southwest China. Preprints 2021, 2021080495

Abstract

Since the exploitation of mineral resources results in the release of radionuclides, and consuming radionuclides affects public health in the short and long term. A case study of the environmental radiation impact from coal mining and germanium processing was carried out in southwest China. The coal mines contain germanium and uranium and have been exploited for more than 40 years. The farmlands around the site of coal mining and germanium processing have been contaminated by the solid waste and mine water in some extend since then. Samples of crops have been collected from contaminated farmlands in research area. The research area covers a radius of 5 km, in which there are 2 coal mines located. 210Pb and 210Po have been analyzed as the key radionuclides during monitoring program. The average activity concentrations of 210Pb and 210Po in the crops were 1.38 and 1.32 Bq/kg in cereals, 4.07 and 2.19 Bq/kg in leafy vegetables and 1.63 and 1.32 Bq/kg in root vegetables. The annual effective doses due to the ingestion of 210Pb and 210Po in consumed crops have been estimated for adult residents living in research area. The average annual effective dose was 0.336mSv/a, while the minimum was 0.171 mSv/a and the maximum was 0.948 mSv/a. The results show that crops grown on contaminated farmland contained an enhanced level of radioactivity concentration. Ingestion doses of local residents in research area were significantly higher than the China average level of 0.112 mSv/a, and the world average level of 0.042 mSv/a through 210Pb and 210Po in crops intake respectively.

Keywords

Natural radioactivity; risk assessment; 210Pb and 210Po; radiological impact; polluted mine site.

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