化物浸和活性化材料的强度发展与城市固体废物焚烧飞灰,红泥和碳化物渣
Wei Zhang1, Caihong Xue2, Dezhi Zhao2
1State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao, 066000, China.
Journal of environmental management
|July 31, 2025
概括
这项研究使用红泥和碳化物渣来从危险的飞中制造耐用的活性材料 (AAM),减少化物出,改善建筑垃圾管理.
科学领域:
- 材料科学 材料科学 材料科学
- 环境工程环境工程
- 建筑技术 建筑技术 建筑技术
背景情况:
- 城市固体废物焚烧飞灰 (MSWI FA) 提出了一个危险废物挑战.
- 活性材料 (AAM) 为MSWI FA的价值化提供了一个经济的途径.
- 在AAMs中MSWI FA的化物漏是一个重要的环境问题.
研究的目的:
- 调查使用富含Al2O3的红泥 (RM) 和富含CaO的碳化物渣 (CS) 来缓解含有MSWI FA的AAM中的化物出.
- 确定RM和CS的最佳比例,以提高压力强度和减少化物漏.
- 了解相组合变化和碳化处理对AAMs的影响.
主要方法:
- 使用不同比例的MSWI FA,RM,CS和磨砂颗粒高炉渣 (GGBS) 制备AAM.
- 优化RM和CS含量的压力强度和化物浸出.
- 使用里埃变换红外光谱 (FTIR),X射线衍射 (XRD) 和热重力测量分析 (TGA) 的表征.
- 在56天内评估水溶性化物度和压力强度的变化.
主要成果:
- 最优的混合物 (10% CS, 20% RM, 20% MSWI FA, 50% GGBS) 在56天内达到27.5MPa的最大压力强度.
- 这种最佳混合物还显示了3.5%的最小水溶性化物度.
- RM为和额外的凝做出了贡献,而CS则促进了弗里德尔的盐沉,减少了化物漏. 过度的CS (>10%) 对强度产生了负面影响.
- 碳化处理使矩阵变密,但由于离子交换增加了化物漏.
结论:
- 红泥和碳化物渣有效地解决了由城市固体废物焚烧飞灰制成的活性材料中的化物出.
- 优化的配方为建筑中的危险废物利用提供了可持续的途径.
- 需要进一步研究碳化效应,以平衡矩阵密度和结合.
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