• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Residuals Science & Technology >Effect of Supercritical Carbonation on Leach Ability of Cement-Solidified Heavy Metals
【24h】

Effect of Supercritical Carbonation on Leach Ability of Cement-Solidified Heavy Metals

机译：超临界碳化对水泥固溶重金属浸出能力的影响

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

摘要

Cement solidification body (CSB) has been widely used in treating heavy metals before land filling or recycling. Super critical carbonation, under the conditions of CO 2 pressure above 7.39MPa and temperature above 31.26°C, has been found to significantly improve carbonation efficiency.? Supercritical carbonation may also be beneficial in modifying the CSB material or improving the deficiency of the porosity of CSB. The leaching rates of Cu and Cd ions were analyzed at a leaching time of up to 42 days with leaching liquid temperatures of 25°Cand 70°Cunder natural and supercritical carbonation conditions to investigate the effect of supercritical carbonation on treating CSB. The results showed that supercritical carbonation significantly reduced the leaching rate of Cu ion in early leaching time. However, the leaching rate of Cd ion increased steadily under supercritical carbonation.? Furthermore, liquid temperature has an effect on the leaching rate. The higher the temperature of the leachate, the higher the leaching rate of ion is. The full-life simulation method using the combination of PHREEQC and COMSOL is discussed utilizing the experimental data. The full-life simulation method is also used to analyze the hydration reaction, supercritical carbonation, solidification, and migration of heavy metals in CSB.
机译：水泥固化体（CSB）已被广泛用于在填埋或回收之前处理重金属。已经发现，在CO 2压力高于7.39MPa且温度高于31.26°C的条件下，超临界碳化可以显着提高碳化效率。超临界碳酸化也可能有益于改性CSB材料或改善CSB孔隙率的不足。在自然和超临界碳酸化条件下，在25°C和70°C的浸出液温度下，在长达42天的浸出时间下，分析了Cu和Cd离子的浸出率，以研究超临界碳酸对CSB的处理效果。结果表明，超临界碳酸化在早期浸出时间内显着降低了铜离子的浸出率。但是，在超临界碳酸化作用下，Cd离子的浸出率稳定增加。此外，液温对浸出率有影响。浸出液的温度越高，离子的浸出率越高。利用实验数据讨论了结合PHREEQC和COMSOL的全寿命模拟方法。全寿命模拟方法还用于分析CSB中的水合反应，超临界碳化，固化和重金属迁移。

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