新疆近5年地表水中总α、总β放射性水平

The Total α and Total β Radioactivity Levels in Xinjiang’s Surface Water in the Past Five Years

摘要: 目的：为了解新疆地表水中的放射性水平，监测了近5年主要地表水河流中的总α、总β放射性活度。方法：将待测样品蒸发浓缩，转化成硫酸盐后蒸发至干，然后置于马弗炉内灼烧得到固体残渣。准确称取不少于“最小取样量”的残渣于测量盘内均匀铺平，置于低本底α、β测量仪上测量总α、总β的计数率，以计算样品中总α、总β的放射性活度浓度。结果：新疆近5年主要地表水河流中的总α、总β的放射性水平分别是0.029~0.092 Bq/L和0.047~0.165 Bq/L。结论：新疆近5年地表水中总α、总β放射性水平整体状况良好，并满足了国家《生活饮用水卫生标准》(GB 5749-2006)要求，达到了饮用水标准限值。

Abstract: Objective: In order to understand the radioactivity level in surface water in Xinjiang, the total α and total β activity in major surface water rivers in the past five years were monitored. Methods: The sample to be measured is evaporated and concentrated, converted into sulfate, evaporated to dry, and then burned in a muffle furnace to obtain solid residue. Accurately weigh the residue not less than the “minimum sampling amount”, spread it evenly in the measuring disk, and place it on a low background α, β measuring instrument to measure the counting rate of total α and total β to calculate the radioactivity concentration of total α and total β in the sample. Results: The radioac-tivity levels of total α and total β in major surface water rivers in Xinjiang in the past five years were 0.029~0.092 Bq/L and 0.047~0.165 Bq/L, respectively. Conclusions: In the past five years, the total α and total β radioactivity levels in surface water in Xinjiang have been in good condition, and have met the requirements of the national “Sanitary Standards for Drinking Water” (GB 5749-2006) and reached the limit of drinking water standards.