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城市固体废物焚烧中的重金属的化处理:飞灰:对稳定性和环境风险的300天研究

Ze Zhang¹, Yang Yu¹, Yi Rao²

¹School of Energy and Environmental Engineer, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China.

Waste management (New York, N.Y.)

|March 13, 2025

概括

化剂稳定城市固体废物焚烧飞灰 (MSWI FA),但长期的重金属 (HM) 泄漏风险仍然存在,特别是在区域化垃圾填埋场. 建议在填埋过程中使用防水盖子处理MSWI FA.

科学领域:

环境科学环境科学
废物管理废物管理
地质化学地质化学

背景情况:

城市固体废物焚烧飞灰 (MSWI FA) 填埋是常见的,但长期的重金属 (HM) 风险尚未完全理解.
化是一种主要的治疗方法,但其在稳定MSWI FA的长期有效性需要详细评估.

研究的目的:

为了评估MSWI FA在混合和区分垃圾填埋条件下用三种有机合剂 (CA) 处理的300天稳定性.
评估与重金属 (Pb,Cu,Zn) 随着时间的推移从稳定的MSWI FA中出相关的环境风险.

主要方法:

使用三种常见的有机合剂 (TS-300,SDD,DP) 稳定MSWI FA.
在模拟的混合和区域化垃圾填埋场场景中,对300天的重金属漏的评估.
对结合剂的有效性和重金属物种化 (例如,Pb4+转化为Pb2+) 的分析.

主要成果:

(Pb) 泄漏造成了重大环境风险,特别是在区域化垃圾填埋场,观察到大量的累积泄漏.
化剂最初有效地减少了HM出,但随着时间的推移,有效性下降,特别是在区域化垃圾填埋条件下.
TS-300显示了将不稳定的Pb4+转化为稳定的Pb2+的潜力,增强了长期稳定性,而CA也形成了像CuS这样的沉物.

结论:

有机合剂可以减轻MSWI FA的直接环境风险,但不能消除长期的重金属漏问题.
与混合垃圾填埋场相比,在划分区域的垃圾填埋场中,化MSWI FA的有效性显著降低.
建议在垃圾填埋过程中对化MSWI FA涂上防水盖,以进一步减轻重金属漏的长期环境风险.

关键词:

环境风险环境风险分数分析分数分析.重金属稳定重金属的稳定性泄漏行为泄漏行为.城市固体废物焚烧飞灰城市固体废物焚烧

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