(III) 诱导的六角伯尼石的结构转变:矿物相变对化物运输和价值变化的影响
Yingying Liu1, Pingxiao Wu2, Meiqing Chen3
1School of Environment and Energy, South China University of Technology, Guangzhou Higher Education Mega Centre, Guangzhou 510006, PR China.
The Science of the total environment
|September 27, 2024
概括
将 (Ce) 添加到六角石 (HB) 中,可以提高从水中去除 (As). 经过 Ce 修改的 HB 改善了 As (III) 的固定,在低度下达到饮用水标准.
科学领域:
- 环境化学环境化学
- 地质化学 地质化学
- 材料科学 材料科学 材料科学
背景情况:
- 由于采矿和工业应用,稀土元素 (REEs),特别是 (Ce) 正在土壤中积累.
- 氧化物六角伯尼 (HB) 对于使 (As) 通过氧化化 (AsIII) 来固定 (As) 是至关重要的.
- 了解REEs和HB之间的相互作用对于预测的环境命运至关重要.
研究的目的:
- 调查 (III) 离子如何影响六边形伯尼石的形成.
- 为了确定Ce-修改HB对化物的氧化和去除[As(III) ]的影响.
- 阐明在矿物质中界面REE反应对的环境行为的作用.
主要方法:
- 在Ce (III) 离子的存在下合成六边形伯尼石.
- 合成的Ce轴承六角伯尼石 (Ce-HB) 结构和特性.
- 使用Ce-HB的氧化和去除效率的评估.
主要成果:
- 离子改变了HB结构,降低了结晶性,但增加了特定表面积和基团,增强了As(III) 固定性.
- Ce(III) 被氧化为Ce(IV),在Ce-HB表面形成CeO2纳米颗粒,显著提高了As(III) 清除率.
- Ce-HB 在低于6 mg·L-1的度下实现了饮用水中As去除标准,尽管由于较低的Mn(IV) 比例,As(III) 的氧化率下降.
结论:
- 的结合修改了六边形伯尼石的特性,增强了它对不动化的能力.
- 经过 Ce 修改的 HB 显示出对治理的前景,特别是在满足饮用水标准方面.
- 这项研究提供了关于六角石和在环境迁移和转化中的共存行为的基本见解.
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