Natural sunlight-driven photocatalytic mineralization of petrochemical wastewater using ceramic-supported Fe, B co-doped TiO2/CNT@WO3 in a flat panel photoreactor

IF 6.7 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-07-17 DOI:10.1016/j.jwpe.2025.108328

Mehdi Rahbar, Mona Hosseini-Sarvari

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引用次数: 0

Abstract

This work presents the development of a sunlight-driven photocatalytic system for effective degradation of real petrochemical wastewater containing phthalic anhydride. To this end, a photocatalyst comprising Fe, B co-doped TiO₂ decorated with WO₃ wrapped around carbon nanotube (CNT@WO₃) was synthesized using sol-gel method, and immobilized as a thin film on sintered ceramic substrates. A flat-panel photoreactor was designed to maximize sunlight exposure and enhance photocatalytic activity. Under 40 h of natural sunlight irradiation, the immobilized photocatalyst achieved 53 %, and 41 % removal of chemical oxygen demand (COD) and total organic carbon (TOC), respectively, along with an 88 % reduction in turbidity. The specific activity (11.85 ppm. g⁻¹.h⁻¹) and the energy efficiency (611.62 kWh.m⁻³.order⁻¹) were determined for the conducted photocatalytic degradation. The oxidant-assisted photocatalytic reaction using H₂O₂ and Na₂S₂O₈ led to further improved efficiency. Liquid chromatography-mass spectrometry (LC-MS) analysis validated the extent of photocatalytic degradation of the contaminants. The immobilized photocatalyst exhibited excellent stability over 10 consecutive reaction cycles. Radical scavenging experiments revealed that hydroxyl radicals (^•OH) are dominant species driving the degradation reaction. Formation of the ^•OH radicals was further confirmed using photoluminescence method and coumarin as a probe molecule.

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在平板光反应器中利用陶瓷负载Fe， B共掺杂TiO2/CNT@WO3对石化废水进行天然光催化矿化

这项工作提出了一个阳光驱动的光催化系统的发展，有效地降解含邻苯二酸酐的实际石化废水。为此，采用溶胶-凝胶法合成了Fe， B共掺杂TiO2的光催化剂，并将WO3包裹在碳纳米管（CNT@WO3）上，作为薄膜固定在烧结陶瓷衬底上。设计了一种平板光反应器，以最大限度地增加阳光照射，提高光催化活性。在40小时的自然阳光照射下，固定化光催化剂的化学需氧量（COD）和总有机碳（TOC）去除率分别达到53%和41%，浊度降低88%。比活度（11.85 ppm）。测定了导电光催化降解的能量效率（611.62 kWh.m−3.order−1）。利用H2O2和Na2S2O8进行氧化辅助光催化反应，进一步提高了反应效率。液相色谱-质谱（LC-MS）分析验证了光催化降解污染物的程度。该固定化光催化剂在连续10个反应周期内表现出优异的稳定性。自由基清除实验表明，羟基自由基（•OH）是驱动降解反应的优势种。利用光致发光法和香豆素作为探针分子进一步证实了•OH自由基的形成。

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies