城市固体废物样本的孔隙结构的变化,在降解过程中具有不同的能力来支持垃圾填埋场结构:使用X射线计算微观断层学分析合成废物
Xinyi Liu1, Xinyu Ding1, Yongning Ren1
1School of Environment, State Key Laboratory of Regional Environment and Sustainability, Beijing Normal University, Beijing 100085, China.
Waste management (New York, N.Y.)
|December 18, 2025
概括
城市固体废物 (MSW) 填埋场的孔隙结构随着降解而变化. 无形的MSW毛孔缩小,而固定形状的MSW毛孔生长,受粒子支和微生物活动的影响.
科学领域:
- 地质技术工程 地质技术工程
- 环境科学 环境科学
- 材料科学 是一种材料科学.
背景情况:
- 孔隙结构对于城市固体废物 (MSW) 填埋场的气体和液运输至关重要.
- 随着时间的推移,废物降解会显著改变毛孔大小和连接性.
研究的目的:
- 在模拟垃圾填埋场退化过程中,研究MSW孔状结构在不同粒子形状下的演变.
- 确定影响垃圾填埋场孔隙结构变化的因素.
主要方法:
- 使用的垃圾填埋场模拟容器含有无形和固定形状的MSW颗粒.
- 使用现场计算机断层扫描 (CT) 扫描来监测毛孔结构演变.
- 应用Avizo软件用于提取特征性孔隙结构参数.
主要成果:
- 无论是无形的还是固定形状的MSW都表现出无模式的孔径分布.
- 无形的MSW显示毛孔结构收缩,节点毛孔大小减少和通道缩小/缩短.
- 固定形状的MSW表现出毛孔结构的增长,带有扩大的节点毛孔和扩大的通道 (长度增加~1000μm).
结论:
- 废弃物孔结构的演变是由废弃物颗粒支和微生物生物降解之间的平衡决定的.
- 粒子支促进毛孔结构扩张,而微生物活动导致收缩.
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