羟胺-氨三乙酸强化Fe(Ⅲ)/H<sub>2</sub>O<sub>2</sub>体系降解橙黄G的研究

王真然; 彭藴斓; 刘义青; 付永胜

doi:10.13205/j.hjgc.202404013

羟胺-氨三乙酸强化Fe(Ⅲ)/H₂O₂体系降解橙黄G的研究

doi: 10.13205/j.hjgc.202404013

西南交通大学地球科学与环境工程学院,成都 611756

基金项目:

四川省科技厅应用基础研究项目(2021YJ0385)

详细信息

作者简介:
王真然(1996-),男,博士研究生,主要研究方向为水污染控制。wangzr@my.swjtu.edu.cn

通讯作者:
刘义青(1989-),男,讲师,主要研究方向为水污染控制。liuyq@swjtu.edu.cn

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出版历程
- 收稿日期: 2023-04-18
- 网络出版日期: 2024-06-01

HYDROXYLAMINE-NITRILOTRIACETIC ACID ENHANCED Fe(Ⅲ)/H₂O₂ SYSTEM FOR DEGRADATION OF ORANGE G

Faculty of Geosciences and Environmental Engineering, Southwest Jiaotong University,Chengdu 611756, China

摘要

摘要: 为改进传统芬顿法存在的pH应用范围窄、铁泥产量大的缺陷,构建了Fe(Ⅲ)-氨三乙酸(NTA)/羟胺(HAm)/H₂O₂体系以降解偶氮染料橙黄G(OG)。结果表明:Fe(Ⅲ)-NTA/HAm/H₂O₂体系可在中性条件下高效降解OG,降解率可达到90%以上,[DK]·OH是体系内降解OG的主要活性物种。OG在Fe(Ⅲ)-NTA/HAm/H₂O₂体系中的降解速率随着溶液pH的升高而降低,适当增加Fe(Ⅲ)、NTA、HAm、H₂O₂浓度有利于OG在该体系中的降解,但过量添加这些试剂会对OG的降解产生抑制作用。NTA的引入可将体系的pH应用范围从酸性拓展至弱碱性,而加入HAm可通过促进体系内Fe(Ⅱ)再生以大幅削减Fe的用量。与传统芬顿法相比,Fe(Ⅲ)-NTA/HAm/H₂O₂体系有效弥补了其存在的短板,具有较大的应用潜力。
- 羟胺 /
- 氨三乙酸 /
- 芬顿法 /
- 高级氧化技术 /
- 橙黄G
Abstract: To improve the shortcomings of the traditional Fenton method, such as narrow pH application range and high iron mud production, the present study developed an Fe(Ⅲ)-nitrilotriacetic acid (NTA)/hydroxylamine (HAm)/H₂O₂ system for the degradation of azo dye Orange G (OG). Experimental results demonstrated that Fe(Ⅲ)-NTA/HAm/H₂O₂ system could effectively degrade OG under neutral condition with a degradation rate of 90% above, and ·OH was the dominant reactive species responsible for OG degradation in this system. The degradation rate of OG in the Fe(Ⅲ)-NTA/HAm/H₂O₂ system decreased with the increase of solution pH. Appropriate increases in Fe(Ⅲ), NTA, HAm, and H₂O₂ concentrations were beneficial for OG degradation in this system, but excessive addition of these reagents would inhibit OG degradation. The introduction of NTA could expand the pH application range of the traditional Fenton process from acidic to weakly alkaline, and the addition of HAm remarkedly reduced the dosage of Fe by promoting the regeneration of Fe(Ⅱ) in the system. Compared with the traditional Fenton process, this Fe(Ⅲ)-NTA/HAm/H₂O₂ system showed great potential for practical applications.
- hydroxylamine /
- nitrilotriacetic acid /
- Fenton process /
- advanced oxidation technologies /
- Orange G

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