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用支持的Fe-Mn二元氧化物快速有效地对污染的地表水和田地土壤进行整治

Yanyan Gong¹, Yang Bai¹, Peilin Ye¹

¹College of Environment and Climate, Guangdong Provincial Key Laboratory of Environmental Pollution and Health, Jinan University, Guangzhou, 511443, People's Republic of China.

|August 24, 2024

概括

这项研究引入了一种新的Fe-Mn@Al2O3复合物,用于有效地从水和土壤中去除反 (Sb). 该材料有效地固定了Sb,减少了污染场所的环境风险和生物可访问性.

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:

表面水和土壤中的反 (Sb) 污染是一个重大的环境问题.
之前的研究合成了Fe-Mn@Al2O3,显示MnO2氧化Sb (III) 到Sb (V) 和FeOOH/Al2O3吸附Sb物种.

研究的目的:

评估Fe-Mn@Al2O3在从地表水中去除反方面的有效性.
用Fe-Mn@Al2O3.3来评估污染的田地土壤中的反在现场封存.

主要方法:

研究了在pH范围 (5.0-10.0) 和不同度的溶解有机物 (DOM) 中从水中去除Sb.
评估溶解氧对Sb去除和总Sb去除的影响.
将Fe-Mn@Al2O3应用于田地土壤,并在30天内分析可浸的Sb (H2SO4,HNO3) 和Sb特种变化.

主要成果:

从水中去除Sb是独立于pH的 (95.4%的Sb),总Sb的60.5%).
DOM稍微抑制了总的Sb去除,而溶解氧增强了Sb (III) 去除,但减少了总的Sb去除.
5% Fe-Mn@Al2O3 在土壤中抑制了93.6%的可浸的Sb,将Sb的特异化转化为更稳定的分数.

结论:

Fe-Mn@Al2O3对于从地表水中去除Sb是有效的,即使使用高DOM和无机配体也表现良好.
复合材料有效地固定了田地土壤中的Sb,降低了生物可访问性和环境风险.
这项研究表明了在水和土壤中进行Sb整治的简单,快速和有效策略.

关键词:

它们是反的.铁Mn二元氧化物的二元氧化物.重金属是一种重金属.土壤整治土壤整治土壤整治表面的水是表面的水.

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