用活性粘合剂稳定废厂砂的金属封装:批量和柱子漏试验
Suéllen Tonatto Ferrazzo1, Mariana Tonini de Araújo1, Giovani Jordi Bruschi1
1Graduate Program in Civil Engineering, Universidade Federal do Rio Grande Do Sul, Porto Alegre, 90035-190, Brazil.
Journal of environmental management
|October 18, 2023
概括
这项研究表明,活性结合剂 (AAB) 能够有效地稳定废砂 (WFS),防止金属出. 这种可持续的方法可以减少污染的土壤和地下水带来的环境风险.
科学领域:
- 环境科学 环境科学
- 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:
- 废物稳定对于管理土壤和地下水中的金属污染至关重要.
- 废造砂 (WFS) 由于潜在的重金属含量,存在环境风险.
- 开发可持续的结合剂是有效的废物管理和资源利用的关键.
研究的目的:
- 为了评估废厂砂 (WFS) 的金属封装效率,用活性粘合剂 (AAB) 稳定.
- 用AAB稳定WFS的性能与用波特兰水泥 (PC) 稳定WFS的性能进行比较.
- 为了研究不同测试条件下的金属漏行为.
主要方法:
- 开发了一种活性粘合剂 (AAB),使用了甘包灰 (SCBA),水合石灰和氧化.
- 使用开发的AAB和传统的波特兰水泥 (PC) 稳定WFS.
- 进行批量 (NBR 10005) 和列 (ASTM D4874) 漏试验,以评估金属的移动性.
主要成果:
- 所有WFS-AAB和WFS-PC混合物都没有表现出金属毒性.
- WFS-AAB矩阵有效封装了WFS和SCBA中存在的重金属 (Cd,Cr,Pb).
- 与ASTM D4874.4相比,NBR 10005方法的漏结果更有利于满足水质标准.
结论:
- 活性粘合剂为稳定废弃造砂提供了可行且环保的替代品.
- 粘合剂类型和浸出试验方法对环境性能的评估有重大影响.
- 有效的废物稳定降低了环境风险,并为工业副产品增加了价值.
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