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从先进的处理介质中确定垃圾填埋气体中挥发性金属的洞察力

Thomas J Smallwood¹, Jordan K Magnuson¹, Jake T Thompson¹

¹Department of Environmental Engineering Sciences, University of Florida, P. O. Box 116450, Gainesville, FL 32611-6450, USA.

Journal of hazardous materials

|October 19, 2023

概括

垃圾填埋气 (LFG) 含有高水平的 (As) 和 (Sb),超过之前的估计,并将废弃活性炭 (AC) 分类为危险废物. 有效的交流洗器对于减轻这些重要的挥发性金属排放至关重要.

科学领域:

环境科学环境科学
地质化学地质化学
废物管理废物管理

背景情况:

垃圾填埋场的挥发性金属排放是一个日益严重的环境问题.
以前的研究低估了垃圾填埋气 (LFG) 对 (As) 和 (Sb) 释放的贡献.
活性炭 (AC) 在LFG处理系统中使用,但其捕获研究较少的挥发性金属的能力需要进一步调查.

研究的目的:

分析来自LFG处理系统的挥发性金属的消耗电流,特别是As和Sb.
量化LFG中的As和Sb度,并将其与之前报告的水平进行比较.
评估来自垃圾填埋场的As和Sb排放对环境的影响以及AC洗器的有效性.

主要方法:

使用一套扩展的分析技术,分析消耗的活性炭 (AC).
在垃圾填埋气体 (LFG) 中 (As) 和 (Sb) 度的量化.
液化气排放量与浸出物排放量和监管毒性极限值的比较.

主要成果:

在LFG中检测到高水平的As和Sb,最低平均度分别为640μg m-3和590μg m-3.
每年通过LFG释放的As和Sb显著超过了液排放量,这表明LFG是主要的排放途径.
消耗的AC超过了美国对As的毒性限制,将其归类为危险废物,但AC洗器有效地将金属释放量降到最低.

结论:

垃圾填埋场气体是一个主要的,以前被忽视的As和Sb排放来源,需要将它们纳入全球排放库存.
有效的LFG处理系统,如AC洗器,对于减轻垃圾填埋场对环境的挥发性金属的释放至关重要.
监管框架可能需要更新,以考虑到LFG对挥发性金属污染的重大贡献.

关键词:

它们是反的.亚是一种.垃圾填埋场的气体排放量金属合物是一种金属合物.金属金属金属可再生天然气可再生天然气

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