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不同的Fe(III) 前体对铁碳复合物去除的行为和机制的影响

Jing Xie¹, Caiyun Han¹, Sufang He²

¹Guangxi Key Laboratory of Advanced Structural Materials and Carbon Neutralization, School of Materials and Environment, Guangxi Minzu University, Nanning, 530006, China.

Environmental science and pollution research international

|May 29, 2025

概括

铁碳复合材料有效地从水中去除有毒的. 前体铁酸 (Fe(NO3) 3由于Fe(II) -OH组促进了氧化还原反应,产生了最高的吸附能力.

科学领域:

环境化学环境化学
材料科学材料科学材料科学
吸附科学吸附科学

背景情况:

(Tl) 是一种高度有毒的重金属,对人类和动物健康构成风险.
从受污染的水源中有效地去除Tl(I) 对环境安全至关重要.

研究的目的:

为了合成和评估铁碳复合材料的Tl (I) 吸附.
研究不同铁前体对吸附性能和机制的影响.

主要方法:

三种铁碳复合物的合成使用Fe ((NO3) 3),Fe2 ((SO4) 3) 和FeCl3前体.
批量吸附实验以确定 Tl ((I) 清除效率和容量.
复合结构的表征 (例如BET表面积) 和吸附机制的分析 (例如XPS).

主要成果:

来自Fe ((NO3) 3) 的铁碳复合物表现出比Fe2 ((SO4) 3) (36.29 mg/g) 和FeCl 3 (21.08 mg/g) 更高的TL ((I) 吸附率 (76.34 mg/g).
Fe ((NO3) 3前体导致复合材料具有更高的BET表面积,更松散的结构和增强的稳定性.
射线光电谱学 (XPS) 揭示了Fe(NO3) 3复合物的主要吸附机制涉及由Fe(II) -OH组促进的氧化还原反应.

结论:

铁前体的选择显著影响铁碳复合材料的Tl (I) 吸附性能.
在Fe (NO3) 3衍生的复合物中存在Fe (II) -OH组,这对于通过氧化还原机制有效地去除Tl (I) 是至关重要的.
硫酸盐离子 (SO4^2-) 可能抑制由Fe2(SO4)3.3衍生的复合材料中的吸附作用.

关键词:

吸附方式吸附方式吸附方式铁 (Fe) OH (II) OH (II) OH (II) OH (II) OH (II) OH (II) OH (III) OH (II) OH (II) OH (III) OH (II) OH (III) OH (II) OH (II) OH (III) OH (II) OH (II) OH (II) OH (III) OH (II) OH (III) OH (II) OH (III) OH (II) OH (II) OH (II) OH (II) OH (III) OH (II) OH (II) OH (III) OH (II) OH (II)这是一种基基.氧化还原反应的反应在SO4 2−中.(I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (II) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I) (I)

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