在基于MKPC的砂实验评估中同时固定重金属
Zbyšek Pavlík1, Martina Záleská1, Milena Pavlíková1
1Department of Materials Engineering and Chemistry, Faculty of Civil Engineering, Czech Technical University in Prague, Thákurova 7, 166 29 Prague, Czech Republic.
Materials (Basel, Switzerland)
|December 23, 2023
概括
酸水泥 (MKPC) 有效地使砂中的重金属 (Ba2+,Pb2+,Zn2+) 不动,超过98.7%的不动化. 这为污染废物管理和建筑应用提供了可持续的解决方案.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 土木工程 土木工程是指土木工程.
背景情况:
- 工业活动造成的重金属污染对环境和健康构成重大风险.
- 生态毒性重金属 (HM) 阻碍了可持续发展,并降低了环境质量.
- 重金属的稳定和固定是环境修复的关键挑战.
研究的目的:
- 用酸水泥 (MKPC) 砂研究 (Ba2+), (Pb2+) 和 (Zn2+) 的同时固定.
- 评估受HM污染的MKPC砂的结构,机械和卫生性能.
- 为了确定MKPC作为重金属稳定矩阵的有效性.
主要方法:
- 人工污染的MKPC砂含有Ba2+,Pb2+和Zn2+盐溶液.
- 结构和水化产品的分析.
- 测量液中的重金属含量,以确定固定比率.
- 评估机械性能 (压力和屈曲强度).
- 评估水运输特性 (吸水系数和吸水率).
主要成果:
- 所有调查的HM的固定率都超过了98.7%.
- 液HM含量仍然低于非危险废物的限值.
- 重金属降低了46.5% (压力) 和57.3% (柔性) 的砂强度,但仍然保持了足够的机械阻力.
- 低水运输参数 (Aw = 4.26 × 10-3 kg·m-2·s-1/2,S = 4.0 × 10-6 m·s-1/2) 显示了有限的HM漏.
结论:
- 基于MKPC的砂对于同时稳定Ba2+,Pb2+和Zn2+是非常有效的.
- MKPC矩阵为处理重金属污染废物提供了一种安全和环保的方法.
- 尽管强度降低,但受HM污染的MKPC砂保留了各种建筑应用的足够机械性能,显示了重金属漏潜力较低.
关键词:
这是一个复合材料.重金属重金属的使用.固定化 固定化 固定化固定化比率的固定化比率.泄漏 (leaching) 泄漏 (leaching) 是指一个过程.和酸水泥是和酸的水泥.结构和机械参数.更多相关视频
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