增强重金属从土壤中通过旋深出水在气旋中从土壤中脱落
1School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China.
Journal of environmental sciences (China)
|October 1, 2023
概括
一种新的状深技术有效地从受污染的土壤中去除重金属,如,,和. 这种物理技术增强了化学液,为工业采矿现场整治提供了一个有前途的解决方案.
科学领域:
- 环境科学 环境科学
- 地质化学 地质化学
- 化学工程是化学工程的重要组成部分.
背景情况:
- 工业采矿活动导致土壤中大量的重金属污染.
- 重金属污染现场的修复对环境和人类健康至关重要.
- 现有的整治方法经常面临效率和化学剂使用的挑战.
研究的目的:
- 开发和评估用于重金属修复的状深技术.
- 使用这种新的技术,研究As,Cd,Sb和Pb的脱吸效率.
- 为了比较流洗法与传统的化学洗方法.
主要方法:
- 使用物理技术与化学漂水剂相结合.
- 研究了粒子大小对重金属度的影响.
- 确定了气旋的最佳运行条件 (固体-液体比率).
- 评估了不同的液剂,包括氧酸 (OA),酸 (CA) 以及它们与EDTA (OAPE,CAPE) 的组合.
主要成果:
- 土壤中的重金属度随着颗粒大小的减少而增加.
- 气旋分离的最佳固体液体比为1:20,达到84.7%的效率.
- 与OAPE相比,Eddy浸出显示了7.29.4%的As,Cd,Sb和Pb的优越脱吸效率.
- 基于酸的液剂 (OA和OAPE) 比基于酸的液剂 (CA和CAPE) 更有效.
结论:
- 埃迪深技术显著提高了重金属脱吸效率.
- 该技术通过减少液剂要求,为土壤整治提供了潜在的更可持续的方法.
- 这种方法为清理被重金属污染的工业采矿区提供了宝贵的技术支持.
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