完全由固体废物制成的非化陶矿,由煤炭飞灰和脱的城市固体废物焚烧飞灰制成:性能和水化机制
Kai Xu1, Xinyuan Zhan2, Yan Wang3
1School of Resources and Environmental Engineering, Hefei University of Technology, Hefei, Anhui 230009, China.
Journal of environmental management
|November 6, 2025
概括
这项研究开发了一种新型的非化陶矿 (NSC),使用废物,如脱的城市固体废物焚烧飞灰 (DFA). 由此产生的NSC有效地固定重金属,并提供显著的环境效益,提供可持续的废物管理解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
- 废物管理 废物管理
背景情况:
- 无化城市固体废物焚烧飞灰 (DFA) 由于重金属的漏,造成环境风险.
- 有效和无害的DFA处理方法对于可持续的废物管理至关重要.
研究的目的:
- 使用各种固体废物,包括DFA,开发非化陶矿 (NSC).
- 评估合成NSC的物理性质,环境安全和水化机制.
- 探索一种新的方法,共同利用固体废物的资源.
主要方法:
- 使用煤炭飞灰 (CFA),高炉砂渣 (GGBFS),烟气脱硫石膏 (FGDG) 和DFA合成NSC.
- NSC属性的表征:压力强度,表面密度,吸水率和软化系数.
- 使用XRD,FTIR,TG-DSC和SEM-EDS的水化机制的研究.
- 评估重金属漏度 (Zn,Cr,Pb,Cu,Cd) 与排放标准的比较.
主要成果:
- 最佳NSC配方 (CFA:GGBFS:FGDG:DFA = 4:9:2:1) 实现了5.94MPa的压力强度和1911公斤/立方米的密度.
- 在NSC中,水吸收率 (3.12%) 和软化系数 (68.47%) 均较好.
- 低碳排放强度 (67.1公斤CO2/) 强调了环境优势.
- 化涉及形成C-A-H,C-(A) -S-H凝,AFt,AFm和AH3的反应,有效地固定重金属.
- 重金属的漂水度低于国家排放限制 (GB8978-1996).
结论:
- 开发的NSC为利用包括DFA在内的固体废物提供了一个有希望的,环保的解决方案.
- 这种方法有效地固定重金属,确保最终产品的安全性.
- 这项研究为合作利用工业固体废物的资源提供了一条新的途径.
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