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生物炭作为一种可持续的吸附剂,用于从酸性矿井排水中去除兰化物

Joan Serra-Ventura¹, Sandra Rasero-López¹, Marc Romera-Miró¹

¹Departament d'Enginyeria Química i Química Analítica, Facultat de Química, Universitat de Barcelona (UB), Martí i Franquès 1-11, 08028, Barcelona, Spain.

|May 6, 2025

概括

生物炭有效地从污染水中去除化物 (Ln),包括酸性矿井排水 (AMD). 这种可持续材料为处理Ln丰富的液和减轻环境风险提供了具有成本效益的解决方案.

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:

兰化物 (Ln) 采矿产生废物液和酸性矿井排水 (AMD),由于高度的Ln和铁 (Fe) 和酸性pH,造成环境风险.
有效的补救策略对于降低污染水中的Ln水平至关重要.
生物炭为水处理提供了一个可持续且具有成本效益的替代方案.

研究的目的:

调查从松树枝 (PB) 和花园废物 (GaW) 中获得的生物炭的可行性,以从受污染的水中去除化物 (La, Sm, Lu).
在模拟条件下评估生物炭在治疗酸性矿井排水 (AMD) 的有效性.
评估不同水矩阵对生物炭Ln.吸附能力的影响.

主要方法:

一直流吸附技术模拟生物炭屏障用于水过.
使用 Sm-spiked 双离子化水 (DD) 和河流淡水 (FW) 测试生物炭材料.
评估生物炭性能与混合Ln (La,Sm,Lu) 污染和模拟的AMD.

主要成果:

生物炭在DD和FW中表现出对Sm的显著吸能力,在矩阵之间没有统计学上显著的差异.
PB生物炭:220 (DD) 和216 (FW) meq公斤-1; GaW生物炭:459 (DD) 和392 (FW) meq公斤-1对于Sm.
生物炭对混合Ln和Sm的吸附能力相似,Ln在吸附点均分布. 如果操作时间得到管理,高缓冲容量的生物燃料适用于AMD治疗.

结论:

生物炭,特别是来自GaW的生物炭,是从各种水基质中去除类化合物的有前途的材料,包括AMD.
生物炭的缓冲能力有利于治疗在AMD中发现的酸性状况.
优化操作参数对于最大限度地提高生物炭的效率和防止在AMD修复中超过其酸中和能力至关重要.

关键词:

酸矿井排水系统酸矿井排水系统生物炭是一种生物炭.连续流量吸附吸附方式兰他化物兰他化物吸附吸附方式吸附吸附方式水的整治水的整治.

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