Study on the natural radioactivity level of stone coal-bearing strata in East China

Xu, Naizheng; Wei, Xinxiang; Fuxiang, Kuang; Zhang, Linxi; Liu, Hongying

doi:10.1007/s12665-018-7916-2

Cited by 13 publications

(9 citation statements)

References 8 publications

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“…During the same year, i.e. 2018 stone coal-bearing strata in East China was evaluated by Naizheng Xu et al for radioactivity concentration (Joel et al, 2018;Xu et al, 2018). Baolu Yang et al in 2019 collected samples of topsoil from Shangrao Prefecture (eastern region) for the assessment of natural as well as artificial radioactivity concentration (B.…”

Section: Summary Of the Resultsmentioning

confidence: 99%

Review of low-level background radioactivity studies conducted from 2000 to date in people Republic of China

Khan

Sun

Lewis

2020

Journal of Radiation Research and Applied Sciences

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About 87% of the total dose received by the general public is due to naturally existing radioactive nuclides. Long-term exposure to the relatively long half-life radioactive elements (including Uranium, Thorium, and Potassium) and their decay products pose severe health threats to the population including lung cancer. The related available data has been collected from numerous studies conducted in China over the last two decades. Several studies have been conducted to determine the radioactive content of primordial Uranium-238, Thorium-232, Radium-226, Potassium-40, and anthropogenic Cesium-137 radionuclides in building materials, soil samples from cultivated lands, fertilizers used for reformation of soil, ash (fly, bottom) from coal fired power plant, water for irrigation and dietary items by means of High Purity Germanium HPGe or Sodium Iodide NaI (Tl) detectors. The radium equivalent activity ðRa eq Þof all the studied materials was found to be less than 370 Bq/kg except in soil from Baoji coal fired power plant (CFPP), building materials from Weinan, Xing, Fly ash from Xiangyang and coal-bearing strata from East china. The glazed tiles from Guandong, Xhaanxi, Shandong, and Zhejiang with Ra eq > 370 Bq/kg, Gamma Index ðI γ Þ > 6, corresponding to a γdose rate higher than the permissible limit of 1 mSv/yr. The volume of the gathered data is vast and scattered, and it is required to compile all data regarding the natural as well as man-made radioactivity in China. The main goal of this paper is to establish a nationwide baseline data on natural radioactivity levels by reviewing and compiling the outcomes of the conducted studies within the entire country.

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Section: Summary Of the Resultsmentioning

confidence: 99%

Review of low-level background radioactivity studies conducted from 2000 to date in people Republic of China

Khan

Sun

Lewis

2020

Journal of Radiation Research and Applied Sciences

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“…A study on the environmental impact of the development and utilization of radioactive stone coal mines in the ve provinces of Hubei, Hunan, Anhui, Jiangxi, and Zhejiang, which account for over 90% of stone coal reserves, revealed that the average speci c activity of 238 U in the soil of mining areas was 370 Bq kg − 1 , eight times higher than the background average (Ye et al 2004). In a study conducted by Xu et al (2018) within the stone coal strata of East China, the monitoring of natural radioactivity levels in air, solid, water, and plant media unveiled that the effective dose of γ-radiation exceeded the threshold (5 mSv/a). Additionally, the concentrations of total α and total β in groundwater at speci c samples exceeded the environmental standard limits by 10 to 30 times (Xu et al 2018).…”

Section: Introductionmentioning

confidence: 99%

“…In a study conducted by Xu et al (2018) within the stone coal strata of East China, the monitoring of natural radioactivity levels in air, solid, water, and plant media unveiled that the effective dose of γ-radiation exceeded the threshold (5 mSv/a). Additionally, the concentrations of total α and total β in groundwater at speci c samples exceeded the environmental standard limits by 10 to 30 times (Xu et al 2018). Radiological environmental monitoring data obtained by Wei et al (2021) in a stone coal mining area of Anhui Province also indicated that the mean concentration of total α in pit water was 3.27 Bq L − 1 , exceeding the highest allowable discharge concentration of 1 Bq L − 1 (Wei et al 2021).…”

Section: Introductionmentioning

confidence: 99%

Occurrence, mobility, and potential risk of uranium in an abandoned stone coal mine of Jiangxi Province, China

Wei,

Xu,

2024

Preprint

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Metal sulfide oxidation in abandoned exposed stone coal mines leads to the generation of Acid Mine Drainage (AMD), characterized with high uranium concentration, which is a major concern for local public health. This work employs an approach of geochemical analysis and modelling to determined the mode of occurrence of uranium. Additionally, potential environmental risks were evaluated. The results revealed that the primary source of uranium pollutants in the surrounding environmental media was attributed to the weathering of mine waste. Concentrations of harmful elements (e.g., U, Fe, sulfate) and acidity in water rapidly decreased to background levels with increasing distance from the mine. The geochemical distribution characteristics of sediments and water exhibit notable similarities. The species of uranium underwent a transformation as uranium in mine waste rocks migrated to environmental media. In acidic pit water, uranium primarily existed as uranyl sulfate, gradually transitioning downstream to complexes dominated by hydrophosphate and carbonate. This transition was accompanied by the coprecipitation of significant amounts of uranium with phosphate and iron hydroxides. Results from the geoaccumulation index (Igeo) and risk assessment codes (RAC) indicated that uranium in unweathered coal waste rocks and newly formed pit sediments posed a high environmental risk, with a bioavailable fraction reaching up to 26.44% and 48.0%, respectively. This research holds significant importance in devising remediation and management strategies for abandoned coal mines to mitigate the impact of uranium release and mobility on the surrounding ecological environment.

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“…Qiang et al 20 and Huang et al 21 studied coal-related fires on a global scale and concluded that fiber optic pyrometry can be used effectively to monitor the temperature and determine the extent of the some coals spontaneous combustion. For isotope radon measurement, Ribeiro et al, 22 Cheng et al, 23 and Xu et al 24 studied the complex coalfield fire zone in close coal seams and reported that the exact location of spontaneous combustion in coalfields can be precisely determined. Shao et al, 25 Hui et al, 26 al.…”

Section: Introductionmentioning

confidence: 99%

“… 21 studied coal-related fires on a global scale and concluded that fiber optic pyrometry can be used effectively to monitor the temperature and determine the extent of the some coals spontaneous combustion. For isotope radon measurement, Ribeiro et al., 22 Cheng et al, 23 and Xu et al 24 studied the complex coalfield fire zone in close coal seams and reported that the exact location of spontaneous combustion in coalfields can be precisely determined. Shao et al, 25 Hui et al, 26 and Wang et al 27 investigated coal samples under load and the mechanism of spontaneous combustion; they concluded that a change in resistivity accurately reflects the temperature change during spontaneous combustion.…”

Section: Introductionmentioning

confidence: 99%

Early Detection of Coal Spontaneous Combustion by Complex Acoustic Waves in a Concealed Fire Source

et al. 2023

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Prevention and control of coal spontaneous combustion are key to coal mining and storage. Existing technologies for the detection of coal spontaneous combustion have limitations, but coal spontaneous combustion creates some serious disasters in areas of the world where coal mining and/or storage exists. New technologies to detect coal spontaneous combustion are urgently needed to reduce the loss of life and resources. The article reviews the main techniques employed to detect coal spontaneous combustion and their advantages and disadvantages; it also reviews the good application prospect of acoustic temperature measurement technology on coal spontaneous combustion and introduces the basic principle of acoustic coal temperature measurement. The evolution of combustion sound and the propagation and attenuation of acoustic waves in quasi-porous media are discussed to form the basis for the development of acoustic thermometry technologies that can be used to accurately identify acoustic signals and temperature fields in loose coal. The concept of "single-source" coal temperature measurement to "dual-source" coal temperature measurement achieved by using combustion sound and an additional sound source device in the automatic combustion of loose coal in the mined area is discussed. The deep learning methods and correlation analyses are available to map the relationships between combustion sound, coal temperature, and sound velocity, and acquire coal temperature from dual source composite acoustic signals. The study lays the foundation for the development of acoustic thermometry technologies that have applications in different stages of combustion and applied to the early warning, prevention, and control of spontaneous combustion in coal, and it contributes to improving the environmental safety and efficiency of coal mining and storage.

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Study on the natural radioactivity level of stone coal-bearing strata in East China

Cited by 13 publications

References 8 publications

Review of low-level background radioactivity studies conducted from 2000 to date in people Republic of China

Review of low-level background radioactivity studies conducted from 2000 to date in people Republic of China

Occurrence, mobility, and potential risk of uranium in an abandoned stone coal mine of Jiangxi Province, China

Early Detection of Coal Spontaneous Combustion by Complex Acoustic Waves in a Concealed Fire Source

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