Homogenous Electro-Fenton degradation of phenazopyridine in wastewater using a 3D Printed filter-press flowcell: Optimization via response surface methodology

IF 5.5 3区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of the Taiwan Institute of Chemical Engineers Pub Date : 2025-02-19 DOI:10.1016/j.jtice.2025.106026

Soorena Gharibian , Ferdows Sajedi , Hossein Hazrati , Mohammad Rostamizadeh

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引用次数: 0

Abstract

Background

Most studies on Advanced Oxidation Processes (AOPs) for wastewater treatment focus on small-scale batch reactors, highlighting the need for large-scale continuous systems to remove emerging pollutants like biorecalcitrant pharmaceuticals.

Methods

In this study, the treatment of synthetic phenazopyridine (PHP) wastewater at a pre-pilot scale by homogeneous electro-Fenton (HEF) process using a continuous filter-press flowcell in full recirculation is presented. Moreover, operational parameters were optimized using a three-level full-factorial central composite design (CCD) method within the framework of a design of experiments (DOE) approach.

Significant findings

Results indicated that the HEF process could be well expressed using a quadratic mathematical equation with significant statistical meaning (F-value=18.68 and P-value=0.001). Optimized operational parameters were pH≅3, initial PHP=2 mg L^-1, Fe²⁺=0.72 mg L^-1, and voltage=5 V which led to a predicted and actual PHP removal percent of 74.89 and 75.14±1.2 %. Oxidation of PHP was validated using size-exclusion chromatography analysis. The results of this study pave the way for techno-economic evaluations of continuous pilot HEF process given the successful applicability DOE method for the process optimization and modularity of filter-press flowcells (multiple stacks and reactors in series concept) for the purification of actual pharmaceutical wastewater.

Abstract Image

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使用3D打印压滤池降解废水中的非那氮吡啶：通过响应面法优化

大多数关于废水处理的高级氧化工艺（AOPs）的研究都集中在小规模间歇反应器上，强调需要大规模连续系统来去除诸如生物顽固性药物等新出现的污染物。方法采用全循环连续压滤式流式电池，采用均相电fenton （HEF）工艺处理合成苯氮吡啶（PHP）废水。此外，在实验设计（DOE）方法的框架下，采用三水平全因子中心复合设计（CCD）方法对操作参数进行优化。结果表明，HEF过程可以用二次方程很好地表达，具有显著的统计学意义（f值=18.68，p值=0.001）。优化的操作参数为pH = 3，初始PHP=2 mg L-1, Fe2+=0.72 mg L-1，电压=5 V，预测和实际的PHP去除率分别为74.89和75.14±1.2%。用排阻色谱法验证了PHP的氧化作用。本研究的结果为连续中试HEF工艺的技术经济评价铺平了道路，因为DOE方法成功地适用于流程优化和压滤液池（多堆和反应器串联概念）的模块化，用于实际制药废水的净化。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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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.