| 137 Cs在土壤中淋溶迁移的模拟试验 |
| |
| 引用本文： | 陈思宇,魏欣,韩玥,钟岳志,高晓飞,刘宝元.137 Cs在土壤中淋溶迁移的模拟试验[J].北京师范大学学报(自然科学版),2016,52(5):635-638. |
| |
| 作者姓名： | 陈思宇 魏欣 韩玥 钟岳志 高晓飞 刘宝元 |
| |
| 作者单位： | 北京师范大学地理学与遥感科学学院，100875，北京;北京大学城市与环境学院，100871，北京 |
| |
| 摘 要： | ~(137)Cs作为示踪元素广泛应用于土壤侵蚀及泥沙沉积研究中,其在土壤中的稳定性是决定其能否用于示踪土壤沉积与侵蚀的前提条件.但也有学者对应用~(137)Cs示踪技术的重要假设提出质疑,认为被土壤颗粒吸附的~(137)Cs易解吸成Cs+离子,随水流失或被植物吸收.本文利用双层土柱模拟淋溶装置研究了~(137)Cs和土壤粒径组成在不同雨量条件下的淋失和垂直迁移特征.结果表明,在600~3 000mm降雨量内,土壤中~(137)Cs平均质量活度为10.9Bq·kg-1,略小于试验前的11.5Bq·kg~(-1),与雨量并无显著相关性,土壤中的~(137)Cs有向下垂直迁移现象,但并不显著;土壤中~(137)Cs质量活度与土壤中的黏粒含量有很好的正相关性,决定系数R2达到0.73;有待于增加模拟雨量,作进一步研究.
|
| 关 键 词： | 土壤侵蚀 137 Cs示踪 淋溶迁移 土壤粒径组成 |
137 Cs movements in soil |
| |
| CHEN Siyu,WEI Xin,HAN Yue,ZHONG Yuezhi,GAO Xiaofei,LIU Baoyuan.137 Cs movements in soil[J].Journal of Beijing Normal University(Natural Science),2016,52(5):635-638. |
| |
| Authors: | CHEN Siyu WEI Xin HAN Yue ZHONG Yuezhi GAO Xiaofei LIU Baoyuan |
| |
| Abstract: | 137 Cs is a widely used tracer in soil erosion research,it′s stability in soil is a precondition for its use to trace soil erosion.Some questioned the 137 Cs technology,because 137 Cs adsorbed to soil particles could be easily desorbed into Cs+ ions,with water loss or absorption by plants.Therefore 137 Cs and soil particle composition were studied under different rainfall leaching and vertical migration characteristics with double simulated soil column leaching device.It was found that within 600 mm-3000 mm rainfall,average content of soil 137Cs was 10.9 Bq·kg-1,slightly less than 11.5 Bq·kg-1 in control.No significant correlation was found between soil 137 Cs activity and rainfall,soil 137 Cs showed vertical migration,but also not significant.A positive correlation was found between soil 137 Cs and clay content,with R2 of 0.73.Larger simulated rainfall will be needed for further study. |
| |
| Keywords: | soil erosion 137 Cs leaching migration soil particle |
| 本文献已被 CNKI 万方数据 等数据库收录！ |
|
