在酸硫酸盐环境中,对的吸附到施瓦特曼尼特
Mohammad Rastegari1, Niloofar Karimian2, Scott G Johnston3
1Faculty of Science and Engineering, Southern Cross University, Lismore, NSW 2480, Australia.
Journal of hazardous materials
|August 17, 2024
概括
施瓦特曼尼特通过替代将其纳入其晶体结构,从而提高矿物质的稳定性. 这种工艺即使在高负载下也是有效的,并且耐酸盐.
科学领域:
- 环境地质化学环境地质化学
- 矿物学是什么?矿物学是什么?
- 环境科学 环境科学
背景情况:
- 施韦特曼尼特是一种铁氧硫酸盐矿物质,在酸硫酸盐环境中影响的移动性.
- 了解施瓦特曼尼特的Sb(V) 吸收机制对于酸性矿井排水和酸硫酸盐土壤整治至关重要.
研究的目的:
- 为了研究水性抗氧化物 (V) 吸附在施瓦特曼尼特上的机制.
- 确定施瓦特曼尼特在控制酸硫酸盐条件下的Sb (V) 流动性的作用.
主要方法:
- 在硫酸盐丰富的溶液中,在环境相关的负载和pH3下检查了Sb(V) 吸附到施瓦特曼尼特.
- 使用Antimony K-edge扩展X射线吸收细结构 (EXAFS) 谱学来分析Sb(V) 协调和联系.
主要成果:
- 通过边缘和双角共享链接发生了Sb (V) 吸附,表明在施瓦特曼尼特结构中发生了异性Sb (V) -对-Fe (III) 替代.
- Sb(V) 吸附不受表面复合点的限制,并且表现出强烈的对酸盐去吸附的抵抗力.
- 吸附Sb(V) 增强了施瓦特曼尼特的稳定性,降低了其溶解率.
结论:
- 施瓦特曼尼特通过将其纳入其晶体结构来固定Sb(V),而不仅仅是表面复合.
- 这种机制凸显了施瓦特曼尼特在酸硫酸盐环境中对Sb(V) 的隔离中发挥的重要作用.
- 这些发现对理解和管理酸性矿井排水和土壤中的抗氧化物污染有意义.
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