南充市生活饮用水中总α、总β放射性水平状况调查  

The evaluation of the radioactive levels of the total α, the total β of drinking water in Nanchong City

作　　者：张宗辉[1] 吴云[1] 王忠林[1] 甘霖[1] 罗靖[1] 张玉美[1] 

机构地区：[1]南充市疾病预防控制中心,四川南充637000

出　　处：《现代预防医学》2013年第10期1842-1844,1846,共4页Modern Preventive Medicine

摘　　要：目的了解南充市管网水及水源水中放射性核素总α、总β基础水平及水体受放射性污染状况。方法采集南充市城区全部5个自来水厂12个月的水源水、出厂水、管网水。测量总α放射性使用有效厚度法,测量总β放射性使用薄样法。结果所检测水样中总α值为0.328～0.008Bq/L,平均0.062Bq/L,总β值为0.140～0.014Bq/L,平均0.044Bq/L,计算不同季节水样总α值总体均数差异无统计学意义F0.05(3,120)=1.402(P﹥0.05),总β值差异有统计学意义F0.05(3,120)=4.665(P﹤0.05),为夏季最高,秋季其次,春冬季大致相同,分别为0.032Bq/L、0.051Bq/L、0.043Bq/L、0.034Bq/L,不同区域总α值总体均数差异无统计学意义F0.05(3,120)=0.376(P﹥0.05),总β值差异有统计学意义F0.05(3,120)=4.034(P﹤0.05),为支流最高,上游和中游相当,下游较低,分别为0.051Bq/L、0.115Bq/L、0.052Bq/L、0.068Bq/L。结论南充市城区全部5个自来水厂的水源水、出厂水、管网水中总α、β放射性浓度均低于国家标准且接近四川省环境水体的整体水平。OBJECTIVE To find out the basic level of the total α, the total β, and their polluted situations in drinking water of Nanchong City. METHODS Source water, treated water, pipe network water of all five waterworks in Nanchong cityzone during 12 months were collected and the total et by effective-thickness method, and the total β by thin-sample method were measured. RESULTS In the detected water sample, the total α was at the level of 0.008 to 0.328 Bq/L, and the average level was 0.062 Bq/L while the total β was at the level of 0.014 to 0.140 Bq/L, and the average level was 0.044 Bq/L. The overall mean difference of total ct in different seasons had no statistical significance [F0.05 （3, 120） = 1.402 （P 〉 0.05）], while the overall mean difference of total β had statistical significance [F0.06 （3, 120） = 4.665 （P〈 0.05）], and the total β value was highest in summer, fall next, spring and winter were roughly the same. The value were 0.032 Bq/L, 0.051 Bq/L, 0.043 Bq/ L, 0.034 Bq/L respectively. The overall mean difference of the total α had no statistical significance in different areas [ F0.05 （3, 120） = 0.376 （P 〉 0.05）1, While the overall mean difference of total β had statistical significance [F0.05 （3, 120） = 4.034 （P 〈 0.05）] and the total β value was the highest in tributary, upstream and midstream were almost the same, down- stream was the lowest. The value were 0.051 Bq/L, 0.115 Bq/L, 0.052 Bq/L, 0.068 Bq/L respectively. CONCLUTION The radioactive concentrations of the total α and total β in all five waterworks＇ source water, treated water and pipe network water in Nanchong cityzone are lower than national standard and approaches the overall level of environmental water of Sicbuan Province.

关 键 词：饮用水 总α 总β 放射水平 

分 类 号：R123.5[医药卫生—环境卫生学]