氚,无论是自然发生的还是由人类核活动引起的,会导致环境中的大量氚污染,尤其是在水循环中,在降雨中造成高浓度的氚.这项研究的目的是通过两个不同地区的降雨来测量环境中的tri水平,以此作为监测环境中tri污染的基础。在2021-2022年期间,在Kasetsart大学站每24小时在泰国收集雨水样本,为期1年,Sriracha校园,春武里省和湄河农业气象站,清迈省。使用电解富集法结合液体闪烁计数法测量了雨水样品中的tri水平。基于离子色谱法分析了雨水的化学成分。结果(以±组合不确定度表示)表明,Kasetsart大学站Sriracha校园的雨水样品中的tri含量在0.9±0.2-1.6±0.3TU(0.11±0.02-0.19±0.03Bq。L-1).平均浓度为1.0±0.2TU(0.12±0.03Bq。L-1).雨水样本中最常见的离子是SO42-,Ca2+,和NO3-,平均浓度为1.52±0.82、1.08±0.51和1.05±0.78mg。分别为L-1。从MaeHia农业气象站收集的雨水中的tri含量在1.6±0.2-4.9±0.4TU(0.19±0.02-0.58±0.05Bq。L-1).平均浓度为2.4±0.4TU(0.28±0.05Bq。L-1).雨水中最常见的离子是NO3-,Ca2+,和SO42-,平均浓度为1.21±1.02、0.67±0.43和0.54±0.41mg。分别为L-1。两个站的雨水中tri的浓度不同,但保持在自然水平(小于10TU)。tri浓度与雨水的化学成分之间没有相关性。从这项研究中获得的tri水平可以作为参考和监测由于核事故或活动而导致的未来环境变化的基础,国内和国际。
Tritium, whether naturally occurring or caused by human nuclear activity, can result in a large amount of
tritium contamination in the environment, especially in the water cycle, causing a high concentration of
tritium in rainfall. The objective of this research was to measure the level of tritium in the environment from rainfall in two different areas as a basis for monitoring
tritium contamination in the environment. Rainwater samples were collected in Thailand every 24 h for a period of 1 year during 2021-2022 at the Kasetsart University Station, Sriracha Campus, Chonburi province and at the Mae Hia Agricultural Meteorological Station, Chiang Mai province. The tritium levels were measured in rainwater samples using the electrolytic enrichment method combined with liquid scintillation counting. The chemical composition of the rainwater was analyzed based on ion chromatography. The results (presented with ± combined uncertainty) showed that the tritium content in the rainwater samples at Kasetsart University Station Sriracha Campus was in the range 0.9 ± 0.2-1.6 ± 0.3 TU (0.11 ± 0.02-0.19 ± 0.03 Bq.L-1). The mean concentration was 1.0 ± 0.2 TU (0.12 ± 0.03 Bq.L-1). The most common ions found in the rainwater samples were SO42-, Ca2+, and NO3-, with mean concentrations of 1.52 ± 0.82, 1.08 ± 0.51, and 1.05 ± 0.78 mg.L-1, respectively. The tritium content in rainwater collected from the Mae Hia Agricultural Meteorological Station was in the range 1.6 ± 0.2-4.9 ± 0.4 TU (0.19 ± 0.02-0.58 ± 0.05 Bq.L-1). The mean concentration was 2.4 ± 0.4 TU (0.28 ± 0.05 Bq.L-1). The most common ions found in the rainwater were NO3-, Ca2+, and SO42-, with mean concentrations of 1.21 ± 1.02, 0.67 ± 0.43, and 0.54 ± 0.41 mg.L-1, respectively. The tritium concentration in the rainwater at both stations differed but remained at a natural level (less than 10 TU). There was no correlation between the tritium concentration and the chemical composition of the rainwater. The
tritium levels obtained from this
study could be used as a basis for reference and monitoring of future environmental changes due to nuclear accidents or activities, both domestically and internationally.