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我们应该如何激活酸 (VI)? 铁 (IV) 和铁 (V) 讲述有关诺基诺转化和毒性变化的不同故事

Zhongjuan Wang^1,2, Ye Du^1,2, Tong Liu^1,2

¹State Key Laboratory of Hydraulics and Mountain River Engineering, College of Architecture and Environment, Sichuan University, Chengdu 610065, China.

Environmental science & technology

|March 1, 2024

概括

高价铁物种Fe (IV) 和Fe (V) 来自酸盐 (Fe (VI)) 激活对污染物转化产生不同的影响. Fe (IV) 降低了基诺抗生素的毒性,而Fe (V) 增加了毒性,强调需要考虑这些风险.

科学领域:

环境化学环境化学
氧化过程氧化过程
水处理处理水的方法

背景情况:

铁酸盐 (Fe(VI)) 激活产生高价值铁物种 (Fe(IV,Fe(V)) 用于微污染物氧化.
在污染物转化过程中,与Fe (IV) 和Fe (V) 相关的独特风险仍未得到充分研究.

研究的目的:

调查Fe (IV) 和Fe (V) 对诺基诺抗生素降解和毒性的差异性影响.
在污染物转化过程中比较Fe (VI) -单独,Fe (III) /Fe (VI) 和NaHCO (III) /Fe (VI) 过程.

主要方法:

使用Fe(VI) 单独,Fe(III) /Fe(VI) 和NaHCO(3) /Fe(VI) 系统的诺基诺抗生素的氧化.
对产品积累和毒性变化的分析.
密度函数理论 (DFT) 计算以阐明反应机制.

主要成果:

在Fe (III) /Fe (VI) 过程中,Fe (IV) 对于levofloxacin降解有99.9%的贡献,而Fe (V) 在NaHCO (III) /Fe (VI) 过程中则有89.4%的贡献.
在Fe(IV) 主导的过程中,levofloxacin的细胞毒性降低了1.9毫克的/L,而在Fe(V) 主导的过程中,其显著增加了4.7毫克的/L.
Fe(IV) 通过氧化皮佩拉津组来降低毒性,而Fe(V) 通过诱导龙环开放来增加毒性.

结论:

铁 (IV) 和铁 (V) 呈现出不同的污染物转化路径和相关的毒性风险.
与Fe (V) 相比,Fe (IV) 在降低诺基诺抗生素的毒性方面更有效.
未来的Fe ((VI) 激活策略必须考虑Fe ((IV) 和Fe ((V) 构成的差异性风险,以有效处理水.

关键词:

铁 (Fe) 是一个物质.铁 (Fe) 是一种诺基诺的化.运动模型运动模型运动模型毒性的毒性毒性的毒性

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