Potlako J. Mafa , Mope E. Malefane , Francis Opoku , Jianzhou Gui , Dan Liu , Bhekie B. Mamba , Alex T. Kuvarega
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引用次数: 0
Abstract
Water pollution by pharmaceutical drugs has raised concerns as this negatively impacts human health and the entire ecological system. Herein, a highly efficient Zn1-xCoxMoO4 photocatalyst with oxygen vacancy (ZCMx-OV) and enhanced visible light absorption was designed and synthesized through heteroatom inclusion. The x-ray photoelectron spectroscopy and electron paramagnetic resonance confirmed the formation of oxygen vacancies, while ultraviolet-visible analysis indicated enhanced visible light absorption. The rate of tetracycline (TC) elimination by optimal ZCM2 was 6.88, 1.75, and 1.47 times higher than those of ZM, ZCM1, and ZCM3, respectively. Again, the rate of ZCM2 towards tetracycline degradation was 1.38, 1.32, and 1.26 folds in deionized water compared to diverse water matrices such as snow, tape, and lake water. Tetracycline was mainly removed by holes (h+) and superoxide (•O2−) as confirmed by trapping experiments and EPR analysis. The density functional theory (DFT) Fukui index predictions confirmed vulnerable bonds of TC attacked by oxygen radicals. This study provides a fresh perspective and valid reference for designing highly active and efficient photocatalytic material through heteroatom introduction for pharmaceutical degradation and can be extended to other pollutants of emerging concern.
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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
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