Toward combined photo-electrochemical system for degradation of ceftriaxone contaminated water over Ti-based mixed metal oxide photoanodes performance evaluation and mechanism insights

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2024-10-01 DOI:10.1016/j.jtice.2024.105787

Mahmoud Zarei , Ali Ranjbar , Behnaz Hazrati Dorigh , Tala Babaei , Paria Rostamzadeh , Alireza Gheshlaghi , Mir Ghasem Hosseini

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Abstract

Background

As a growing environmental concern over the accumulation of antibiotics in aquatic environmets, the development of an efficient degradation process has been addressed. In this study, the application of the photo-electrochemical oxidation (PEO) process for the degradation of ceftriaxone was evaluated.

Methods

Experiments were performed in an undivided cell equipped with Ti/IrO₂ (0.1)-Ta₂O₅ (0.1)-TiO₂ (0.8) and Ti/IrO₂ (0.2)-Ta₂O₅ (0.2)-TiO₂ (0.6) as anodes and Platinum (Pt) sheet as the cathode of the degradation process. Anodes were characterized using scanning electron microscopy (SEM), mapping energy dispersive X-ray (EDS-mapping), ultraviolet–visible diffuse reflectance spectroscopy (DRS), and atomic force microscopy (AFM). Cyclic voltammetry (CV) and photocurrent analysis were performed to consider the photo-electrochemical behavior of anodes. The effect of operational parameters, including initial pH (3–9), ceftriaxone initial concentration (C = 10–50 mg L⁻¹), current density (I = 100–500 mA cm⁻²), and Na₂SO₄ as electrolyte concentration (C_electrolyte = 0.05–0.25 mg L⁻¹) on ceftriaxone removal efficiency were determined.

Significant findings

Outcomes of experiments revealed that under optimum conditions (pH = 6, C = 30 mg L⁻¹, C_electrolyte = 0.1 mg L⁻¹, and I = 300 mA cm⁻²), 98.6 % of degradation efficiency was achieved. The combined process resulted in 77.6 and 69.3 % total organic carbon removal of ceftriaxone on Ti/IrO₂ (0.1)-Ta₂O₅ (0.1)-TiO₂ (0.8) and Ti/IrO₂ (0.2)-Ta₂O₅ (0.2)-TiO₂ (0.6) after five hours of PEO process, respectively. Additionally, the feasible intermediates of ceftriaxone degradation were identified using Gas chromatography-mass spectroscopy (GC-MS) analysis.

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钛基混合金属氧化物光阳极降解头孢曲松污染水的光电化学组合系统性能评估与机理研究

背景随着抗生素在水生环境中的累积日益引起环境问题的关注，开发一种高效的降解工艺已成为人们关注的问题。本研究评估了光电化学氧化（PEO）工艺在头孢曲松降解过程中的应用。实验在一个未分割的电池中进行，该电池配备了 Ti/IrO2 (0.1)-Ta2O5 (0.1)-TiO2 (0.8) 和 Ti/IrO2 (0.2)-Ta2O5 (0.2)-TiO2 (0.6) 作为阳极，铂 (Pt) 片作为降解过程的阴极。使用扫描电子显微镜（SEM）、能量色散 X 射线（EDS-mapping）、紫外可见光漫反射光谱（DRS）和原子力显微镜（AFM）对阳极进行了表征。为了研究阳极的光电化学行为，还进行了循环伏安法（CV）和光电流分析。操作参数包括初始 pH 值（3-9）、头孢曲松初始浓度（C = 10-50 mg L-1）、电流密度（I = 100-500 mA cm-2）和电解质浓度 Na2SO4（Celectrolyte = 0.05-0.实验结果表明，在最佳条件下（pH = 6、C = 30 mg L-1、电解质 = 0.1 mg L-1、I = 300 mA cm-2），头孢曲松的降解效率达到 98.6%。经过 5 小时的 PEO 处理，Ti/IrO2 (0.1)-Ta2O5 (0.1)-TiO2 (0.8) 和 Ti/IrO2 (0.2)-Ta2O5 (0.2)-TiO2 (0.6) 上的头孢曲松总有机碳去除率分别为 77.6% 和 69.3%。此外，还利用气相色谱-质谱（GC-MS）分析鉴定了头孢曲松降解的可行中间产物。

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来源期刊

Journal of the Taiwan Institute of Chemical Engineers 工程技术-工程：化工

CiteScore

9.10

自引率

14.00%

发文量

362

审稿时长

35 days

期刊介绍： Journal of the Taiwan Institute of Chemical Engineers (formerly known as Journal of the Chinese Institute of Chemical Engineers) publishes original works, from fundamental principles to practical applications, in the broad field of chemical engineering with special focus on three aspects: Chemical and Biomolecular Science and Technology, Energy and Environmental Science and Technology, and Materials Science and Technology. Authors should choose for their manuscript an appropriate aspect section and a few related classifications when submitting to the journal online.