来自飞灰的地质聚合物材料-一种可持续的危险废物管理方法
Katarzyna Zarębska1, Jakub Szczurowski2, Joanna Muszyńska1
1Faculty of Environmental Engineering, Geomatics and Renewable Energy, Kielce University of Technology, 25-314 Kielce, Poland.
Materials (Basel, Switzerland)
|July 27, 2024
概括
干燥脱硫 (DDS) 工厂的洗水危险飞灰提高了其地质聚合物的性能. 改性灰,当与其他材料相结合时,达到高压力强度和满足重金属处置限制,有助于可持续的废物管理.
科学领域:
- 废物管理和材料科学
- 环境工程 环境工程
背景情况:
- 来自城市废物焚烧的飞灰,特别是来自干脱硫 (DDS) 工厂的飞灰,由于含有危险重金属,会带来利用挑战.
- 在DDS飞灰中含有低和含量限制了其在材料生产中的直接应用.
研究的目的:
- 调查克服DDS飞灰利用挑战的方法.
- 评估改性DDS飞灰在地质聚合物生产中的潜力,并将其性能与传统材料进行比较.
主要方法:
- 来自DDS工厂的飞灰经过了水浸 (修饰).
- 改性灰被用于生产地质聚合物,单独或与燃煤飞灰和商业水泥混合.
- 在得到的地质聚合物样本上进行了压力强度测试.
- 对重金属 (铜,,,,,) 进行了透性测试.
主要成果:
- 仅来自未经处理的DDS飞和煤炭飞的地质聚合物具有较低的压力强度 (<0.6MPa).
- 水显著提高了DDS飞性能,使地质聚合物强度高达18MPa,当与高/飞混合时.
- 与商业水泥混合的修改后的DDS飞灰也显示出可比的强度改善.
- 修改后的灰的重金属漏能力低于垃圾填埋处置的监管限制.
结论:
- 洗水是对危险的DDS飞进行有效的预处理,提高了其适用于地质聚合的适度.
- 修改后的DDS飞灰可以成功地纳入地质聚合物粘合剂和水泥材料.
- 这种方法为可持续管理和利用危险的焚烧飞灰提供了可行的途径.
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