基于废物的电解渣-固体地质聚合物的合成:压力强度和Mn固定
1State Key Laboratory of Silicate Materials for Architectures, Wuhan University of Technology, Wuhan 430070, China.
Materials (Basel, Switzerland)
|March 28, 2024
概括
这项研究将电解残留物 (EMR),煤和飞灰转化为高强度地质聚合物. 由此产生的材料有效地固定了,为工业废物污染提供了一个环保的解决方案.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程环境工程
- 化学工程是化学工程的重要组成部分.
背景情况:
- 大规模储存电解残留物 (EMR) 构成严重的环境污染风险.
- 开发可持续的EMR利用方法对于废物管理和污染控制至关重要.
研究的目的:
- 为了优化EMR,煤 (CG) 和飞灰 (FA) 的混合比,用于地质聚合物合成.
- 研究激活器模量,液体-固体 (L/S) 比率和固化温度对地质聚合物的机械性能的影响.
- 评估合成地质聚合物的环境友好性和矿物成分.
主要方法:
- 使用设计-专家混合设计来确定最佳原材料比率.
- 地质聚合物样本在不同的条件下使用EMR,CG和FA进行合成.
- 评估了机械性能 (压力强度) 和出水.
- 使用FTIR,SEM和EDS技术分析了矿物成分.
主要成果:
- 最佳的混合比率是EMR:CG:FA = 0.43:0.34:0.23.3 的情况.
- 合成的地质聚合物实现了12.0 MPa的压力强度,低28天的Mn液 (0.123 mg/L).
- 地质聚合物主要由酸和地质聚合物凝组成,形成稳定的MnSiO3相.
结论:
- 开发的地质聚合物是一种具有高压力强度的环保材料,有效利用工业废物.
- 地质聚合反应被FTIR,SEM和EDS证实,表明形成了一个密集的结构,其中包括O,Si,Al,Ca和Na等关键元素.
- 这项研究通过生产有价值的地质聚合物材料,为EMR的可持续管理提供了一种可行的方法.
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