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| Distribution Characteristics and Health Risk Assessment of Soil Radioactivity in a Watershed Based on GIS |
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Received:March 14, 2023
Revised:March 15, 2023
Accepted:March 24, 2023
Published Online:July 10, 2023
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| View Full Text View/Add Comment Download reader |
| DOI：doi：10.3969/j.issn.1007-7545.2023.08.016 |
| KeyWord:geographic information system; soil radioactivity; annual effective dose rate; geo-accumulation index |
| Author | Institution |
| MA Ting-ting |
广东省核工业地质局辐射环境监测中心 |
| LI Guan-chao |
广东省核工业地质局辐射环境监测中心 |
| QUE Ze-sheng |
广东省核工业地质局辐射环境监测中心 |
| SUN Gong-ming |
广东省核工业地质局辐射环境监测中心 |
| HU Ying |
广东省核工业地质局辐射环境监测中心 |
| YANG Bo |
广东省核工业地质局辐射环境监测中心 |
| LIN Min |
广东省核工业地质局辐射环境监测中心 |
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| Download times: 1991 |
| Abstract: |
| The investigation of natural radionuclide content in soil is the basis for soil pollution prevention and control. A certain water system in the Pearl River Basin of Guangdong province was selected and based on GIS technology and radiotherapy method, the soil environmental radioactivity level was evaluated by applying γ radiation dose rate, equivalent radium specific activity, external exposure index and annual effective dose rate index, and finally the soil radioactivity health risk assessment was carried out by applying the geo-accumulation index method, one-factor index method and Nemero composite index method. The results show that: 1) The mean values of radionuclides 238U, 226Ra, 232Th, 40K, 137Cs and 210Pb in the soil are 73.31, 68.62, 103.48, 535.12, 0.74 and 60.75 Bq/kg(dry), respectively, which are similar to the overall level of Guangdong province. 2) The background values and anomaly thresholds of radionuclides 238U, 226Ra, 232Th, 40K, 137Cs and 210Pb in the soil of the study area are (27.50, 111.55), (40.46, 134.7), (26.98, 103.95), (232.61, 904.00), (0.43, 0.7), (25.14, 98.35) Bq/kg(dry), respectively. 3) The mean values of soil environmental radioactivity indexes D, Raeq, Hex and AEDR are 118.68±54.26 nGy/h, 257.8±122.91 Bq/kg, 0.70±0.33, and 145.55±66.54 μSv/a, respectively. 4) Soil geo-accumulation index method and single factor index method were used to estimate the contamination level of radionuclides in soil of the study area as light pollution, but the results of Nemerow comprehensive index method were higher and the contamination level was heavy pollution. |
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