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比较酸盐融合和微波消化在具有挑战性的溶解和从底层灰中定量化无机元素
Yasmine Ben Ghorbal1, Nathalie Lyczko1, Patricia Arlabosse1
1Ecole des Mines d'Albi Carmaux, CNRS UMR 5302, Centre RAPSODEE, Albi 81000, France.
ACS omega
|November 17, 2025
概括
与微波消化相比,酸融合是矿化城市固体废物底灰的优越方法. 这种技术确保了精确的基本量化,以有效地管理废物和资源回收.
科学领域:
- 环境化学环境化学
- 分析化学 分析化学
- 材料科学 材料科学 材料科学
背景情况:
- 城市固体废物 (MSW) 焚烧底灰是一种复杂,异质的材料.
- 由于其组成,包括二氧化和氧化物,精确量化底灰的元素具有挑战性.
研究的目的:
- 为了比较微波辅助酸消化和酸聚变在MSW底层灰矿化中的有效性.
- 确定最优的方法,可靠地底灰的元素分析.
主要方法:
- 使用酸 (HF),酸 (HNO3) 和过氧化 (H2O2) 的微波辅助酸消化3小时,6小时和9小时.
- 在高温 (900-1050°C) 上使用甲酸盐 (LiBO2) 流量的酸盐融合.
- 使用感应合等离子体原子发射光谱学 (ICP-AES) 对Si,Ca,Fe,Al,Na和K的元素定量.
主要成果:
- 与6小时的微波消化 (156.5 ± 16 g/kg) 相比,酸融合实现了更高的二氧化回收 (189 ± 6 g/kg).
- 酸盐聚变也显示出对Ca,Fe和Al的优异恢复.
- 在酸融合过程中,高温和性条件有效地分解了复杂的酸盐和氧化物.
结论:
- 酸融合是一种可靠和高效的技术,用于矿化复杂材料,如底层灰.
- 这种方法可以进行准确的定量分析,这对于废物流管理至关重要.
- 酸聚变有助于从废物中回收金属,支持循环经济原则.
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