...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Hazardous Materials >Electrokinetic removal of caesium from kaolin
【24h】

Electrokinetic removal of caesium from kaolin

机译：电动去除高岭土中的铯

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Soil, in the form of kaolin and a sample of natural soil from an industrial site, was artificially contaminated with caesium and subjected to electrokinetic treatment. The effect of catholyte pH control on the process was investigated using different acids to control the catholyte pH. During treatment the in situ pH distribution, the current flow, and the potential distribution were monitored. At the end of the treatment the pore fluid conductivity and the caesium concentration distribution was measured. The results of these experiments showed that for caesium contamination, catholyte pH control is essential in order to create a suitable environment throughout the soil to enable contaminant removal. It was found that the type of acid used to control the catholyte pH affected the rate of caesium removal (nitric, sulphuric, acetic and citric acids were tested). All of the acids tested were effective, but the highest caesium extraction was achieved when nitric acid was used to control the catholyte pH. The relatively high adsorption capacity of the soil for caesium was found to significantly reduce the rate of removal. After 240 h of treatment at 1 V cm~(-1) (using sulphuric acid to control the catholyte pH), less than 80% of the caesium was removed from a 30 cm long sample of kaolin. Electrokinetic treatment of the industrial soil sample was slower than for the kaolin, but a significant extraction rate for caesium was achieved.
机译：高岭土形式的土壤和工业现场的天然土壤样本被铯人工污染，并进行了电动处理。使用不同的酸来控制阴极电解液的pH，研究了阴极电解液pH值控制对工艺的影响。在处理期间，监测原位pH分布，电流和电势分布。在处理结束时，测量孔隙流体的电导率和铯浓度分布。这些实验的结果表明，对于铯污染，阴极电解液的pH值控制对于在整个土壤中创建合适的环境以去除污染物至关重要。发现用于控制阴极电解液pH的酸类型会影响铯的去除速率（已测试了硝酸，硫酸，乙酸和柠檬酸）。所有测试的酸都是有效的，但是当使用硝酸控制阴极电解液的pH值时，铯萃取率最高。发现土壤对铯的相对较高的吸附能力显着降低了去除速率。在1 V cm〜（-1）下处理240小时（使用硫酸控制阴极电解液的pH值）后，从30厘米长的高岭土样品中除去了不到80％的铯。工业土壤样品的电动处理比高岭土慢，但铯的萃取率却很高。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号