机械洞察飞灰稳定硫化物残留物:漂水抑制和稳定通路
Feilong Zhang1, Qian Liang2, Yanhong Wei3
1State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China; Key Laboratory of Ecological Industry, Ministry of Ecology and Environment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China.
Ecotoxicology and environmental safety
|October 22, 2025
概括
飞 (FA) 通过减少出水率99%,有效地稳定硫化残留物 (ASR). 这种废物处理方法将危险的ASR转化为稳定的材料,使用优化的固化条件和基于飞灰的水泥.
科学领域:
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
- 废物管理 废物管理
背景情况:
- 硫化残留物 (ASR) 由于含有 (As) 和硫 (S) 的含量,造成了重大环境风险.
- 有效稳定ASR对于减轻其危险影响至关重要.
研究的目的:
- 开发和评估使用飞灰 (FA) 的硫化残留物 (ASR) 的稳定途径.
- 研究从稳定ASR中的浸出行为和抑制机制.
- 为了最大限度地稳定,优化固化条件.
主要方法:
- 基于飞灰 (FA) 的水泥材料比例和固化条件的方向控制和设计.
- 系统地研究ASR漏行为和抑制机制.
- 响应表面方法 (RSM) 用于分析CaO,水泥含量和液体/固体 (L/S) 比率的相互作用影响.
- 凝固材料的微观结构分析.
主要成果:
- 基于FA的水泥材料证明了ASR的有效稳定,在14天后将的泄度从500 mg/L降至0.4 mg/L (99%的减少).
- RSM分析发现了CaO,水泥含量和L/S比率之间的强烈相互作用,L/S在凝固中发挥着主要作用.
- 微观结构分析显示,从松散结构转变为密集结构,含含量增加,结合的变化从S-As到S-Ca.
结论:
- 基于飞灰的水泥材料为无害处理和稳定硫化残留物 (ASR) 提供了有效的途径.
- 稳定机制涉及酸水合物 (C-S-H) 的吸附,酸水合物 (C-A-S-H) 的沉,合物和物理封装.
- 这项研究提供了一种可持续的解决方案,通过利用废物材料进行处理来管理危险废物.
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