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铁/生物炭处理地下水中的酸盐和之间的相互作用:来自柱体实验的腐蚀控制见解

Yu Feng¹, Carol J Ptacek², David W Blowes²

¹Hubei Key Laboratory of Environmental and Health Effects of Persistent Toxic Substances, School of Environment and Health, Jianghan University, Wuhan 430056, China.

|January 9, 2025

概括

酸盐的添加增强了地下水中的基于铁的生物炭 (FeBC) 的去除. 它通过Fe-Ca-酸盐沉来稳定,控制腐蚀并提高修复效率.

科学领域:

环境科学环境科学
地质化学地质化学
水处理处理水的方法

背景情况:

和在受污染的地下水中共存,使修复工作复杂化.
关于在酸盐存在的流动系统中的拦截存在有限的研究.
基于铁的生物炭 (FeBC) 是潜在的地下水整治材料.

研究的目的:

通过FeBC去除的过程中,研究酸盐和之间的相互作用.
在批量和列实验中评估酸盐对去除效率和机制的影响.
了解酸盐在污染地下水的FeBC性能中的作用.

主要方法:

进行了批量和列实验,以评估FeBC与酸盐和没有酸盐的去除.
用X射线吸收接近边缘结构 (XANES) 分析来研究的物种化和铁的氧化状态.
对沉物和二次矿物进行了化学分析.

主要成果:

酸盐添加促进了FeBC在批量和列系统中的去除.
酸盐通过形成含有As的Fe-Ca-酸盐沉物来增强的稳定性.
酸盐的添加减少了铁的腐蚀和二次矿物质的形成,减轻了被动化和堵塞.
在Fe-Ca-酸盐沉中保留的更容易氧化为五价.

结论:

酸盐在控制腐蚀和在FeBC应用中实现持续释放方面发挥着至关重要的作用.
FeBC,特别是酸盐,显示出有效去除受污染的地下水中的的承诺.
了解酸相互作用为优化基于FeBC的补救策略提供了新的见解.

关键词:

的含量是多少?的含量是多少用铁修饰的生物炭.透的反应屏障是可以透过的.酸盐是一种酸盐.射线吸收光谱学X射线吸收光谱学

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