地质聚合物中的化,减少和吸附剂用于从电泥中稳定重金属
Francesco Genua1, Mattia Giovini1, Cristina Leonelli1
1Department of Engineering "Enzo Ferrari", University of Modena and Reggio Emilia, Via Pietro Vivarelli 10, 41125 Modena, Italy.
Polymers
|January 10, 2026
概括
危险的泥废弃物 (GSW) 使用基于甲的地质聚合物和化学剂进行处理. 这种新的方法显著减少了和的漏,提供了一个环保的废物管理解决方案.
科学领域:
- 环境工程 环境工程
- 材料科学 材料科学 材料科学
- 无机化学 无机化学 有机化学
背景情况:
- 电污泥废弃物 (GSW) 是电的危险工业副产品,含有高度的 (Cr) 和 (Ni).
- 目前的GSW管理策略往往缺乏效率和可持续性,造成环境风险.
- 地质聚合为危险废物的稳定/固化 (S/S) 提供了一个有希望的替代方案.
研究的目的:
- 为了研究基于金属的地质聚合物与化学剂相结合的GSW的S/S的有效性.
- 评估特定剂 (二甲基二甲基碳酸盐 (DTC),硫化 (Na2S) 和酸 (Hap)) 在Cr和Ni上的固定性能.
- 建立一个低碳,高效的战略来管理危险的泥废物.
主要方法:
- 合成了基于metakaolin的地质聚合物矩阵,以封装GSW.
- 包括DTC (化),Na2S (减少) 和Hap (吸附) 在内的化学剂被单独纳入地质聚合物矩阵.
- 进行了漏试验,以量化Cr和Ni的固定.
主要成果:
- 硫化 (Na2S) 通过将Cr (VI) 转化为不溶性Cr (III) 实现了Cr释放的-98.7%的减少.
- 二甲基二甲基碳酸盐 (DTC) 通过形成稳定的Ni (II) (DTC) 2复合物,减少了Ni的出93.4%.
- 氧酸盐 (Hap) 通过离子交换提高了55.5%的Ni保留率,但对Cr的固定有效性有限.
结论:
- 地质聚合与化学添加剂相结合,为危险的GSW提供了高效的S / S方法.
- Na2S和DTC在地质聚合物矩阵中分别是固定Cr和Ni的有效剂.
- 这种方法为电行业废物的环境管理提供了一个可持续的,低碳的解决方案.
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