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废物衍生土壤修改对减轻城市固体废物焚烧 (MSWI) 灰出水的影响的影响的影响

Chad J Spreadbury¹, Jordan K Magnuson¹, Kyle A Clavier¹

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

Waste management (New York, N.Y.)

|July 15, 2023

概括

添加富含铁的废渣修正案显著增加了土壤的土壤.

科学领域:

环境科学环境科学
土壤科学土壤科学
废物管理废物管理

背景情况:

市政固体废物焚烧炉 (MSWI) 灰含有有关微量金属,如 (Sb).
沙地具有较低的固体到液体分区系数 (K_d),表明金属的保留能力较差.
在土壤应用中重新使用MSWI灰需要有效的方法来管理金属漏.

研究的目的:

评估富含铁的工业渣和生物炭修订在沙土中固定Sb的有效性.
确定这些修正案对Sb.固体到液体分区系数 (K_d) 的影响.
评估土壤修改的潜力,以促进MSWI灰的再利用.

主要方法:

在沙性土壤中确定Sb的基线K_d值.
在20%度的沙土中加入铁渣和生物炭修正.
在暴露于MSWI灰液的修改土壤中测量了Sb的K_d值.
使用美国环保署综合水,空气和废物管理 (IWEM) 模型进行风险评估.

主要成果:

在沙性土壤中,基线Sb K_d是低的 (1.6 ± 0.1 L/kg).
铁渣的修正,特别是磁性固体,大幅增加了Sb K_d值 (高达990 L/kg).
生物炭修正案在减少漏的Sb方面效果有限,这可能是由于与pH相关的表面电荷相互作用.
风险评估表明,在经过修改的情况下,可能会降低浸的Sb度.

结论:

富含铁的工业废渣是一种有前途的修正案,用于在沙土中固定Sb.
修改可以显著改善MSWI灰液中的微量金属的保留.
这种方法可以实现MSWI灰在土壤中的更安全和更广泛的再利用应用.

关键词:

抗 (Sb) 是一种有益的使用有益的使用.他们的命运和运输.溶解液是一种溶解液.城市固体废物焚烧 (MSWI)固体与液体的分区系数

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