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目的了解京杭运河(枣庄段)在南水北调工程通水前水中总α和总β放射性本底水平。方法根据GB/T5750.13-2006《生活饮用水标准检验方法》进行采样、检测。检测结果按GB 5749-2006《生活饮用水卫生标准》进行评价。结果 2011年京杭运河(枣庄段)水系总α活度浓度均值为0.21×10-2 Bq/L,丰水期、枯水期分别为0.24×10-2Bq/L和0.18×10-2Bq/L(P>0.05);总β活度浓度均值为12.01×10-2Bq/L,丰水期、枯水期分别为15.03×10-2Bq/L和9.18×10-2Bq/L(P<0.01)。沿岸浅井水总α活度浓度均值为0.40×10-2Bq/L,丰水期、枯水期分别为0.36×10-2Bq/L和0.44×10-2Bq/L(P>0.05);总β活度浓度均值为9.54×10-2Bq/L,丰水期、枯水期分别为12.15.×10-2Bq/L和6.94×10-2Bq/L(P<0.05)。结论京杭运河(枣庄段)水系放射性水平符合国家卫生标准,属于正常天然本底水平,尚未受到放射性核素污染。其变化特点是丰水期高于枯水期。
Objective To understand the total α and total β radioactivity levels of the Beijing-Hangzhou Grand Canal (Zaozhuang section) before the water diversion project passes through the South-to-North Water Diversion Project. Methods According to GB / T5750.13-2006 “drinking water standard test method” for sampling and testing. Test results according to GB 5749-2006 “drinking water health standards” for evaluation. Results The total α-activity concentration of the Jing-Hang Canal (Zaozhuang section) in 2011 was 0.21 × 10-2 Bq / L, and the peak water-dry period was 0.24 × 10-2 Bq / L and 0.18 × 10-2 Bq / L respectively > 0.05). The mean concentration of total β activity was 12.01 × 10-2Bq / L, and the peak water period and dry season were 15.03 × 10-2Bq / L and 9.18 × 10-2Bq / L, respectively (P <0.01). The average α-activity concentration of shallow-hole water in coastal area was 0.40 × 10-2Bq / L, 0.36 × 10-2Bq / L and 0.44 × 10-2Bq / L in dry and wet periods, respectively. The total β-activity The average concentration was 9.54 × 10-2Bq / L, and the wet season and dry season were 12.15 × 10-2Bq / L and 6.94 × 10-2Bq / L, respectively (P <0.05). Conclusions The radioactivity level of the Beijing-Hangzhou Grand Canal (Zaozhuang section) is in line with the national health standards, which belongs to the normal natural background level and has not been contaminated by radionuclides. The change is characterized by wet season is higher than the dry season.