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竞争效应和环境因素导致重金属在稳定的城市固体废物中出,在极端条件下焚烧飞

Ze Zhang¹, Yang Yu², Yi Rao³

¹School of Energy and Environmental Engineer, University of Science and Technology Beijing, 30 Xueyuan Road, Haidian District, Beijing 100083, China; Graduate School of Frontier Sciences, The University of Tokyo, Kashiwa 277-8563, Japan.

Journal of hazardous materials

|June 24, 2025

概括

焚烧城市固体废物 (MSW) 从飞 (FA) 中释放危险的重金属 (HMs). 极端条件加剧HM漏,造成环境风险,特别是金属离子竞争增加和酸性因素.

科学领域:

环境科学环境科学
地质化学地质化学
材料科学材料科学材料科学

背景情况:

城市固体废物 (MSW) 焚烧产生含有危险重金属 (HM) 的飞 (FA).
使用有机合剂 (CA) 的传统稳定方法在金属离子竞争和环境因素稳定性方面有效性不清楚.
了解FA的HM漏对于环境风险评估至关重要.

研究的目的:

调查由FA稳定有机CA的HM的浸出特性和环境风险.
评估冷-解周期和干湿交替对HM漏的影响.
阐明金属离子竞争和环境因素对HM稳定性的影响.

主要方法:

使用有机合剂 (CA) 稳定FA.
在模拟环境条件下 (冷-解,干湿交替) 系统地研究HM出.
分析重金属 (Pb,Cd,Zn) 漏度和影响因素.

主要成果:

极端的环境条件显著增加了FA中的Pb,Cd和Zn的浸出.
在30次干湿交替下,Cd和Pb的水度分别超过标准限值38倍和13倍.
同时存在的金属离子之间的度差异增加增强了竞争性漏效应,而酸性条件 (H+) 促进了HM漏.

结论:

金属离子竞争和环境因素对FA中HM的长期稳定性产生了重大影响.
在恶劣的环境条件下,现有的稳定策略可能不足.
这项研究为制定有效的环境风险评估和FA的长期稳定策略提供了关键的见解.

关键词:

异常暴露场景异常暴露场景环境风险环境风险重金属是一种重金属.竞争力竞争力竞争力竞争力城市固体废物焚烧飞灰城市固体废物焚烧

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