在城市固体废物焚烧过程中污染物元素的分布和迁移,飞在试点规模的炉中化
Yike Zhang1, Zengyi Ma1, Zhiming Han2
1Ningbo Innovation Center, Zhejiang University, Ningbo, 315100, China; State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou, 310027, China.
Journal of environmental management
|March 7, 2025
概括
化城市固体废物焚烧飞灰 (MSWIFA) 可以导致二次污染. 添加石英砂和矿有助于固定重金属,并减少有害排放,如SO2和HCl.
科学领域:
- 环境科学 环境科学
- 废物管理 废物管理
- 材料科学 材料科学 材料科学
背景情况:
- 通过化/玻璃化处理的市政固体废物焚烧飞灰 (MSWIFA) 处理是有希望的,但存在二次污染风险.
- 了解MSWIFA化过程中的污染物迁移对于有效的废物管理至关重要.
研究的目的:
- 调查MSWIFA化过程中重金属,硫和的分布和迁移.
- 评估辅助材料 (石英沙,) 对污染物再分配和固定的影响.
主要方法:
- 一个2t/d试验规模的炉被用于加工MSWIFA.
- 在二次飞 (SFA),玻璃化渣 (VS) 和烟气通道 (AFC) 中的灰中分析污染物成分 (重金属,硫,).
- 对重金属漏的生态风险指数 (RI) 评估.
主要成果:
- 挥发性重金属 (Zn,Pb,Cu,Cd) 迁移到具有高浸出潜力的SFA (RI=792).
- 非挥发性重金属 (Cr,As,Ni) 迁移到具有低漏潜力 (RI=47) 的VS.
- 硫和污染物表现类似于挥发性重金属.
- 石英砂和合金的添加重新分配了挥发性金属到AFC和非挥发性金属到VS,减少了SFA风险,并使VS中的金属不动.
- 辅助材料降低了废气中的SO2和HCl度.
结论:
- 高温化MSWIFA导致污染物迁移,挥发性和非挥发性重金属的分离方式不同.
- 石英砂和是有效的减轻二次污染通过控制重金属,硫和迁移.
- 添加石英砂和胺提升了MSWIFA化/玻璃化的安全性和环境可行性.
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