Spherical concrete beads supported iron-doped nano titania and graphene oxide conjugate as solid photocatalyst for the remediation of aquatic pollutants

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-23 DOI:10.1016/j.jwpe.2025.107548

Uma Sankar Mondal, Sohel Das, Subhankar Paul

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引用次数: 0

Abstract

Here, we have developed iron-doped nano titania (Fe-nTiO₂) and graphene oxide (GO) conjugate immobilized on spherical concrete beads (SCB) as a photo-Fenton catalyst (Fe-nTiO₂/GO@SCB) for the degradation of various aquatic pollutants. The nanocomposite was thoroughly characterized using various techniques including XRD, FESEM, TEM, FTIR, UV–visible spectroscopy, and Raman spectroscopy. Under optimized conditions, the photo-Fenton activity of Fe-nTiO₂/GO@SCB resulted in a 97.4 % degradation of Methyl Blue (MB), 95.2 % of acridine orange (AO), 89.5 % of crystal violet (CV), and 99.2 % of 4-nitrophenol (4NP) in an aqueous solution after 1 h of sunlight exposure. In addition, the catalyst was used to treat simulated wastewater with high chemical oxygen demand (COD) which showed an 82.7 % reduction in COD. Furthermore, the reuse study of the Fe-nTiO₂/GO@SCB demonstrated high efficacy and stability, retaining >90 % degradation efficiency even after fifteen cycles of reuse. Moreover, scavenging experiments confirmed that hydroxyl radicals (•OH) were the primary reactive species involved in the photo-Fenton reaction. Hence, the prepared Fe-nTiO₂/GO@SCB demonstrated a sustainable and energy-efficient solution for the remediation of various aquatic pollutants and simulated wastewater using solar energy, making it highly effective for future large-scale industrial uses.

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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