FeMnCoNi-O活化过硫酸氢钾降解罗丹明B

徐邦利; 严海线; 翁诗雅; 王世琦; 方峰

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中国环境科学 ›› 2025, Vol. 45 ›› Issue (2) : 759-767.

水污染与控制

FeMnCoNi-O活化过硫酸氢钾降解罗丹明B

徐邦利, 严海线, 翁诗雅, 王世琦, 方峰

作者信息 +

Degradation of Rhodamine B by FeMnCoNi-O activated potassium persulfate

XU Bang-li, YAN Hai-xian, WENG Shi-ya, WANG Shi-qi, FANG Feng

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文章历史 +

摘要

以乙酸盐和柠檬酸钠为原料,通过共沉淀-热处理法合成了结构稳定且性能优良的FeMnCoNi-O纳米颗粒,使用XRD,TEM,FT-IR,TG,ICP,XPS等手段对其进行表征,并将其应用于常温常压下活化过硫酸氢钾(PMS)降解罗丹明B(RhB),探究PMS浓度､RhB浓度､污染物种类､FeMnCoNi-O浓度､初始pH值､水中阴离子种类等反应条件对降解效果的影响,以及FeMnCoNi-O纳米颗粒的循环使用性能.结果表明,经过200℃保温2h后样品从普鲁士蓝类似物转变为多元金属氧化物,活化PMS降解RhB能力显著提高.FeMnCoNi-O纳米颗粒可以通过活化微量的PMS(0.2mmol/L),在10min内实现RhB(20mg/L)的完全降解.自由基淬灭和XPS结果表明,体系中主要活性物质为过硫酸氢根活化生成的¹O₂和SO₄^·—.

Abstract

FeMnCoNi-O nanoparticles (NPs) with outstanding structural stability and catalytic performance were synthesized by coprecipitation and consequent calcination method. The FeMnCoNi-O NPs were carefully characterized by X-Ray diffraction (XRD), transmission electron microscope (TEM), Fourier transform infrared spectroscopy (FT-IR), thermal gravimetric analyzer (TG) and X-ray photoelectron spectroscopy (XPS) techniques. Furthermore, the obtained catalyst was applied to activate potassium persulfate (PMS) and degrade Rhodamine B (RhB). The effects of reaction conditions such as the concentration of the RhB, PMS and catalysts concentration, the kinds of pollutant and aqueous pH values, on the degradation process and the recycling performance were systematically investigated. Via the calcined treatment (200^oC, 2h), the final product was the multi-metal oxide, which exhibited enhanced catalytic performance for the RhB degradation. FeMnCoNi-O NPs can achieve complete degradation of RhB (20mg/L) in 10minutes by activating trace amounts of PMS (0.2mmol/L). With the help of free radical quenching experiment and XPS analysis, it is found the main active substances in the degradation system were ¹O₂ and SO₄^·- generated via persulfate activation.

导出引用

徐邦利, 严海线, 翁诗雅, 王世琦, 方峰. FeMnCoNi-O活化过硫酸氢钾降解罗丹明B[J]. 中国环境科学. 2025, 45(2): 759-767

XU Bang-li, YAN Hai-xian, WENG Shi-ya, WANG Shi-qi, FANG Feng. Degradation of Rhodamine B by FeMnCoNi-O activated potassium persulfate[J]. China Environmental Science. 2025, 45(2): 759-767

中图分类号： X703.5

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