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从经过焚烧的城市废物中出水

Kicińska Alicja¹, Caba Grzegorz²

¹Department of Environmental Protection, Faculty of Geology, Geophysics and Environmental Protection, AGH University of Kraków, Mickiewicza 30 Av., 30-059, Kraków, Poland. kicinska@agh.edu.pl.

Environmental geochemistry and health

|June 7, 2024

概括

家庭炉灰中的 (Sr) 含量和可泄漏性因燃料类型而异. 煤炭颗粒等替代燃料的灰显示出最高的度和流动性,构成环境风险.

科学领域:

环境化学环境化学
废物管理废物管理
材料科学是一种材料科学.

背景情况:

城市垃圾焚烧产生含有各种元素的灰,包括 (Sr).
了解含量和透性对于评估与灰处理相关的环境风险至关重要.
家庭炉燃烧各种废物流,导致灰的成分变化.

研究的目的:

为了确定家庭炉燃烧灰中的总 (Sr) 含量.
评估不同废弃物产生的灰中Sr的可泄漏性和流动性.
为了评估提取溶液pH对Sr可性的影响.

主要方法:

收集城市垃圾作为混合流和单独的部分 (例如家具,纸张,塑料,).
在家用炉中燃烧废物以产生灰.
使用HCl+HNO3,H2O,CaCl2和CH3COOH进行单步化学提取,以确定Sr分数 (总含量,可水,可植物利用,碳酸盐结合).
在不同的pH条件下分析Sr可性.

主要成果:

灰中的 (Sr) 度在114至1006毫克/公斤之间,在替代燃料灰 (煤颗粒,木质颗粒) 和混合废物中含量最高.
可通过水透的Sr分数,表明其流动性很高,差异很大 (1.3%至91%的总含量).
降低pH值并没有持续增加Sr提取;材料成分在缓冲pH值变化方面发挥了更重要的作用.
风险评估代码 (RAC) 值表明了各种环境风险,与煤颗粒,木质颗粒,,和混合油容器相关的最高风险 (>70).

结论:

来自替代燃料和混合城市废物的灰可以含有大量的 (Sr).
的流动性和可性高度依赖于灰的矿物和化学成分,而不仅仅是pH值.
特定的废物材料 (如煤颗粒,) 由于其含有的含量和可性,造成更高的环境风险.

关键词:

环境风险评估环境风险评估城市废弃物的分量.化物是一种化物.

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