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有效氧化和从含有铁的地下水中去除酸盐的解决方案

Chaoyun Ying¹, Chang Liu², Feng Zhang²

¹State Environmental Protection Key Laboratory of Soil Health and Green Remediation, Wuhan 430070, China; Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River), Ministry of Agriculture, College of Resources and Environment, Huazhong Agricultural University, Wuhan 430070, China; University Grenoble Alpes, CNRS, University Savoie Mont Blanc, IRD, University Gustave Eiffel, ISTerre, F-38000 Grenoble, France; Department of Geography and Spatial Information Techniques, Zhejiang Collaborative Innovation Center & Ningbo Universities Collaborative Innovation Center for Land and Marine Spatial Utilization and Governance Research, Donghai Academy, Ningbo University, Ningbo 315211, China.

|July 29, 2023

概括

在复杂的水系统中,酸盐增强了有毒的氧化物氧化As (III) 到As (V). 这种结合剂可以防止铁的干扰,促进的去除,并有助于地下水的排毒.

科学领域:

环境化学环境化学
水处理技术水处理技术
无机化学无机化学

背景情况:

氧化物对于氧化水中的有毒 (III) 变成不那么有害的 (V) 是至关重要的.
自然水中的铁 (II) 和其它离子可以抑制这种重要的氧化过程.
了解影响亚III氧化的因素对于有效的水资源整治至关重要.

研究的目的:

调查 (III) 结合剂对复杂水系统中 (III) 氧化的影响.
评估酸盐 (PP) 在Fe (II) 存在时通过birnessite促进As (III) 氧化中的作用.
探索增强的氧化和随后的去除背后的机制.

主要方法:

在环中性pH值下进行的批量实验.
在存在或缺少酸盐 (PP) 的情况下,分析As(III) 氧化动力学.
对表面被动效应和反应性氧物种 (ROS) 生成的研究.

主要成果:

在没有PP的情况下,Fe (II) 与As (III) 竞争,导致Mn氧化物表面被动化和抑制氧化.
添加PP显著增强了birnessite的As(III) 氧化,防止表面被动化,并保持物种在溶液中.
PP促进了反应性氧物种 (ROS) 的产生,进一步促进了III氧化,V的去除仍然有效.

结论:

(III) 结合剂,如PP,在克服Fe (II) 在As (III) 氧化中的干扰方面是有效的.
增强机制涉及防止表面被动化和促进ROS形成.
这些剂为地下水处理中大规模的除毒提供了一个有希望的策略.

关键词:

亚酸盐的氧化过程一个比尔尼斯网站.有铁的铁铁.地下水的处理方法酸铁酸盐的使用方法有反应性氧物种的反应性氧物种.

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