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本文采用固体荧光法、离子交换-铀试剂Ⅲ比色法、硫酸盐共沉淀射气法、磷钼酸铵法和四苯硼钠法等分析方法对淮北煤矿粉煤灰复田生产的食品放射性核素含量进行了调查。结果表明,食品中U、Th、~(226)Ra和~(137)Cs的含量低于我国食品卫生标准的限制浓度。估算了该地区居民对5种核素的年摄入量及所致居民有效待积剂量当量。~(238)U、~(234)U、Th、~(226)Ra和~(137)Cs的年摄入量分别为3.7、3.8、16、16和9.9Bq,所致有效待积剂量当量之和为17μSv,其值与文献提供的全国均值基本接近。因此,从放射性核素含量、年摄入量和有效待积剂量当量看,粉煤灰复田生产的粮食、蔬菜和瓜等食用安全,粉煤灰复田是可行的。
In this paper, solid-state fluorescence, ion exchange - uranium reagent Ⅲ colorimetry, sulfate co-precipitation gas, ammonium phosphomolybdate and tetraphenyl boron sodium method analysis of Huaibei coal mine fly ash production of food radioactivity Nuclide content was investigated. The results showed that the contents of U, Th, ~ (226) Ra and ~ (137) Cs in food were lower than the limit concentrations of food hygiene standards in China. The annual intake of 5 kinds of radionuclides and the equivalent effective doses of inhabitants of residents in this area were estimated. The annual intakes of ~ (238) U, ~ (234) U, Th, ~ (226) Ra and ~ (137) Cs were 3.7, 3.8, 16, 16 and 9.9 Bq, And the sum of 17μSv, the value of the national average and the literature provided by the basic close. Therefore, judging from radionuclide content, annual intake and effective equivalent dose, food, vegetable and melon produced by fly ash recovery farm are safe for food and fly-ash recovery is feasible.