【摘要】 进行了三种不同的¹³⁷CS溶液分别通过秦山、大亚湾核电厂周围七个地区农业土壤耕作层（0～20cm）的试验,这三种¹³⁷Cs溶液为:（1）同体积（40mL）,同比活度（3.7×10⁴Bq/L）¹³⁷Cs溶液;（2）同体积（40mL）,不同比活度（3.7×10³,3.7×10⁴,3.7×10⁵Bq/L）¹³⁷Cs溶液;（3）不同体积（40,80,120mL）,同比活度（3.7×10⁴Bq/L）¹³⁷Cs溶液。结果表明:土柱上层1cm的比活度和¹³⁷Cs溶液比活度之间符合y=A·x^B关系;¹³⁷Cs溶液体积之间符合y=A+Bx关系。上层1cm的土壤对¹³⁷Cs滞留量一般在90％～95％以上,上层5cm的土壤对¹³⁷Cs滞留量均为100％,滤液为本底水平。可以认为:在土壤受到溶液态¹³⁷Cs污染条件下,采取铲除表层的方法可有效减轻或消除污染。更多还原

【Abstract】 The partterns of 137Cs adsorption and percolation are studied by 137Cs solution through soil cylinder samples collected from seven sites around Qinshan and Daya bay nuclear power plants. The top soils (0’?0 cm) are put into plastic tubes after being sieved. Three different ways are taken in the experiments. (1) 137Cs solutions with the same specific activity (3. 7X 104 Bq/L) and same volume (40 mL) pass through the soils. (2) 137Cs solutions with different specific activities (3. 7X 103, 3. 7 X 104, 3. 7 X 105 Bq/L) and with same volume (40 mL) pass through the soils. (3) 137Cs solutions with same specific activity (3. 7X 104 Bq/L) and with different volumes (40, 80, 120 mL) pass through the soils. Results show that the relationship of specific activity on the top 1 cm soil to the specific activity of solution is conform to y ?A ?XB , to the volume of solution is conform to y ?A+Bx. The upper 0~1 cm soil adsorbs l37Cs over 90%~95% , and upper 0~5 cm soil adsorbs 100% 137Cs. When the depth is greater than 5 cm the activity of filtered solution is background. From this experiment, it shows that the contamination can be eliminated by removing top soil when the soil is contaminated by 137Cs solution.更多还原