使用城市固体废物焚烧飞灰用于矿山填充:准备,优化和重金属漏研究
Lijuan Su1, Siyao Wu1, Feng Yu1
1College of Civil Engineering, Liaoning Technical University, 47 Zhonghua Road, 123000, Fuxin, Liaoning, China.
Environmental research
|December 15, 2024
概括
这项研究开发了一种使用城市固体废物焚烧飞灰 (MSWI FA) 和煤炭的新型矿山糊填充方法. 这种可持续的方法使MSWI FA的重金属停滞不前,提高了矿山的安全性并减少了浪费.
科学领域:
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
- 地质技术工程 地质技术工程
背景情况:
- 城市固体废物焚烧飞灰 (MSWI FA) 由于含有重金属而带来了环境挑战.
- 矿山区为MSWI FA通过回填处理提供了一个潜在的解决方案.
- 从废物中开发安全和稳定的回填材料对于环境修复和资源利用至关重要.
研究的目的:
- 调查使用MSWI FA和煤炭的可行性,以创建用于矿山填充的粘料回填材料.
- 通过响应表面方法来优化粘贴填充的混合比率.
- 分析重金属漏行为和强度形成机制的开发后填充.
主要方法:
- 使用MSWI FA和渣渣作为水泥材料,用煤炭作为聚合物,制备粘料回填.
- 使用响应表面方法来优化混合比例.
- 通过实验测试和分子动力学模拟 (材料工作室) 进行材料特性,重金属液和强度开发.
主要成果:
- 确定了最佳的混合比例:81.65%的质量度,3.67%的聚合物-水泥比率和52.27%的细带比率.
- 标识为C-(A) -S-H和N-A-S-H酸盐凝的初级聚合物产品,其中含有较小的化,化和CaCO3.3.
- 重金属的漏率按照Pb2+ > Cr3+ > Cd2+的顺序进行,C-A-S-H凝影响了漏率.
结论:
- 通过使用MSWI FA固体废物,可以成功制备无污染和结构稳定的矿山糊补充材料.
- 开发的填埋场有效地固定重金属,为MSWI FA处置和矿山安全提供可持续的解决方案.
- 分子动力学模拟提供了对重金属离子漏途径和回填物内的吸附机制的洞察.
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