• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International journal of sustainable engineering >Removal of heavy metals from contaminated foundry sand through repeated soil-washing
【24h】

Removal of heavy metals from contaminated foundry sand through repeated soil-washing

机译：通过反复的土壤洗涤去除来自污染的铸造砂的重金属

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

This paper presents investigations on the effectiveness of repeated washing in removing heavy metals from contaminated Foundry Sand (FS) sample collected from a recycling company in Melbourne. It is found that after repeated wash-offs, concentrations of heavy metals reduce significantly and these reductions for all the tested metals follow logarithmic trends. Results are compared with other contemporary findings on the physical separation of heavy metals from contaminated soil. Also, it is observed that higher the concentration of metals found in the initial leaching solution, higher the rate of reduction of concentration in subsequent leaching. Using logarithmic relationship, best-fit equations for the reductions of heavy metals’ concentrations through repeated wash-offs were derived. Using such equations, it is possible to work out a number of washing cycles required for a particular heavy metal to wash it up to the requirement of any particular regulatory authority. In regards to the effect of soil depth on accumulated pollutants’ concentrations, it is found that the concentrations of heavy metals in the leachate linearly vary with the depth of FS column used for testing.
机译：本文提出了对从墨尔本回收公司收集的污染铸造砂（FS）样本中除去重金属的重复洗涤有效性的调查。发现在重复洗涤后，重金属的浓度显着降低，所有测试金属的减少遵循对数趋势。结果与来自受污染土壤的重金属物理分离的其他当代结果进行比较。此外，观察到初始浸出溶液中发现的金属浓度越高，随后浸出中浓度的浓度率越高。使用对数关系，推导出通过重复洗涤液减少重金属浓度的最佳方程。使用这样的等式，可以制定特定重金属所需的许多洗涤循环，以将其洗涤达到任何特定的监管机构的要求。关于土壤深度对累积污染物浓度的影响，发现渗滤液中重金属的浓度随着用于测试的FS柱的深度而线性变化。

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