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The Combined Effect of Bubble and Photo Catalysis Technology in BTEX Removal from Produced Water. BULLETIN OF CHEMICAL REACTION ENGINEERING & CATALYSIS 2022. [DOI: 10.9767/bcrec.17.3.15367.577-589] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Among the several ways used in wastewater treatment, the photocatalysis process is a more novel and alternative process that is increasingly employed in recent years. This work aims to improve the performance of the photocatalyst process by using air bubbles in removing the BTEX from produced water as an indicator of process efficiency. The study also shows the effect of influencing factors (pH and residence time) on the photocatalysis process. The study was done in a rectangular column with dimensions of 200 mm width, 30 mm depth, and 1500 mm height. Commercial titanium oxide (TiO2) coated on a plate by the varnish was used as a source of the photocatalyst. The experiment was carried out under different values of gas flow rate (0-3 L/min) to evaluate its effect on the photocatalyst process, the effect of other variables of pH (3-11), and irradiation time (30-120) min was also studied. A new method of the coating was adopted by using an alumina plate with varnish as an adhesive. The characteristics results show that the coated plate has hydrophilic properties and that there is no significant change in the crystal structure of the TiO2 nanoparticles and the varnish before and after 60 h of the photocatalytic process, indicating that the plate is still effective after 60 h usage under different conditions. The results also show that the introduction of air bubbles enhances the removal efficiency of BTEX significantly and the best removal effectiveness of BTEX was 93% when pH = 5 after 90 min and 90% when pH = 3 after 120 min. The removal rate also reached 86% when pH = 7 after 120 min all at a flow rate of 3 L/min. The percentage of removal decreased at pH = 9 and 11, reaching 64% and 50%, respectively after 120 min and a flow rate of 3 L/min. Copyright © 2022 by Authors, Published by BCREC Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
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Prabagar JS, Yashas SR, Gurupadayya B, Wantala K, Diganta DB, Shivaraju HP. Degradation of doxycycline antibiotics using lanthanum copper oxide microspheres under simulated sunlight. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:57204-57214. [PMID: 35344145 DOI: 10.1007/s11356-022-19842-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 03/17/2022] [Indexed: 06/14/2023]
Abstract
In this study, lanthanum copper oxide was synthesized under hydrothermal techniques and characterized for doxycycline degradation. The catalyst exhibited enhanced photocatalytic doxycycline degradation under visible light owing to its compatible bandgap energy (1.7 eV). The XRD data revealed high crystallinity of the material with no noticeable impurities. Three-dimensional microspheres of varying sizes (average diameter of 2.52 μm) were observed from SEM. EDX confirms the successful synthesis of La2CuO4. The effect of DC concentration, catalyst dosage, and initial pH on the degradation rate of DC was studied methodically. Interestingly, about 85% of doxycycline (10 mg/L) was degraded within 120 min of light-emitting diode irradiation at pH 10. Oxygen vacancies and surface defects were determined through photoluminescence spectra. The recyclability experiments suggested that the catalyst is capable of degrading DC for three consecutive runs. Radical trapping trials suggested that holes (h+), superoxide radicals (●O2-), and hydroxyl radicals (●OH) are involved in the photodegradation of DC. Herein, the novel approach of La2CuO4 synthesis and the efficient visible-light harvesting capability of as-prepared catalyst reveal the potentiality for DC degradation thereby opening a new horizon of research employing La2CuO4 used for various environmental applications.
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Affiliation(s)
- Jijoe Samuel Prabagar
- Department of Environmental Sciences, JSS Academy of Higher Education and Research, Mysuru-570015, Mysuru, India
- Center for Water, Food and Energy, Dombaranahalli Post, GREENS Trust, Turuvekere Taluka, Tumkur District, Harikaranahalli, Karnataka, India, 572215
| | - Shivamurthy Ravindra Yashas
- Department of Environmental Sciences, JSS Academy of Higher Education and Research, Mysuru-570015, Mysuru, India
| | - Bannimath Gurupadayya
- Department of Pharmaceutical Chemistry, JSS College of Pharmacy, JSS Academy of Higher Education and Research, Mysuru-570015, Mysuru, India
| | - Kitirote Wantala
- Department of Chemical Engineering, Faculty of Engineering, Khon Kaen University, Khon Kaen, Thailand
| | - Das Bhusan Diganta
- Department of Chemical Engineering, School of AACME, Loughborough University, Loughborough, Leicestershire, LE11 3TU, UK
| | - Harikaranahalli Puttaiah Shivaraju
- Department of Environmental Sciences, JSS Academy of Higher Education and Research, Mysuru-570015, Mysuru, India.
- Center for Water, Food and Energy, Dombaranahalli Post, GREENS Trust, Turuvekere Taluka, Tumkur District, Harikaranahalli, Karnataka, India, 572215.
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Salhi A, Esserrar S, Nechchadi B, El Amine Ghanjaoui M, Aguedache A, El Krati M, Tahiri S. Application of titanium dioxide immobilized on a cellulosic material for the photocatalytic degradation of Acid Black 24 dye in a continuous flow cascade reactor. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:46778-46787. [PMID: 35174458 DOI: 10.1007/s11356-022-19210-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2021] [Accepted: 02/10/2022] [Indexed: 06/14/2023]
Abstract
The aim of this work is the study of the photocatalytic degradation of Acid Black 24 dye (AB24), in a continuous flow cascade reactor, using titanium dioxide (TiO2) immobilized on a cellulosic material. The results obtained demonstrated a synergistic effect of the two phenomena adsorption and photocatalysis. The effects of various parameters that affect the dye removal efficiency were investigated. The best photocatalytic degradation yield of AB24 molecules is obtained in acidic medium because of the strong attraction between the positively charged catalyst and the anionic dye molecules. The optimum times for obtaining the best yields depend on the initial concentration of the dye, the volume of the treated solution, and the feed rate of the reactor. In addition, reusing the catalytic material several times is technically possible; this can decrease the cost of treatment for a possible industrial scale application.
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Affiliation(s)
- Anas Salhi
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Sana Esserrar
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Bouchra Nechchadi
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Mohammed El Amine Ghanjaoui
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Abdelkahhar Aguedache
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Mohammed El Krati
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco
| | - Soufiane Tahiri
- Laboratory of Water and Environment, Research team: Analytical Chemistry and Environmental Process Engineering, Department of Chemistry, Faculty of Sciences of El Jadida, University Chouaïb Doukkali, P.O. Box 20, 24000, El Jadida, Morocco.
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Zhou Y, Elchalakani M, Liu H, Briseghella B, Sun C. Photocatalytic concrete for degrading organic dyes in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:39027-39040. [PMID: 35098464 DOI: 10.1007/s11356-021-18332-2] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/16/2021] [Accepted: 12/21/2021] [Indexed: 06/14/2023]
Abstract
Since the advent of photocatalytic degradation technology, it has brought new vitality to the environmental governance and the response to the energy crisis. Photocatalysts harvest optical energy to drive chemical reactions, which means people can use solar energy to complete some resource-consuming activities by photocatalysts, such as environmental governance. In recent years, researchers have tried to combine photocatalyst TiO2 with building materials to purify urban air and obtained good results. One of the important functions of photocatalysts is to degrade organic pollutants in water through light energy, but this technology has not been reported in the practical application areas. To extend this technology to practical application areas, photocatalytic concrete for degrading pollutants in waters was proposed and demonstrated for the first time in this paper. The photocatalytic concrete proposed based on the K-g-C3N4 shows a strong ability to degrade the organic dyes. According to the experiment results, the angle of light source plays an important role in the process of photocatalytic degradation, while waters with pH value of 6.5-8.5 hardly influenced the degradation of organic dyes. When the angle of light source is advantageous for photocatalytic concrete to absorb more visible light, more organic dyes will be degraded by photocatalytic concrete. The degradation rate of methylene blue could reach about 80% in ½ hour under desirable conditions and is satisfied compared with that of reported works. This study implicates that photocatalytic concrete can effectively degrade organic dyes in water. The influences of changes in the water environment hardly affect the degradation of organic pollutants, which means photocatalytic concrete can be widely used in green infrastructures to achieve urban sewage treatment.
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Affiliation(s)
- Yiming Zhou
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan, 250014, People's Republic of China
- School of Engineering, Department of Civil, Environmental and Mining Engineering, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia
| | - Mohamed Elchalakani
- School of Engineering, Department of Civil, Environmental and Mining Engineering, University of Western Australia, 35 Stirling Hwy, Crawley, WA, 6009, Australia
| | - Houfeng Liu
- College of Population, Resources and Environment, Shandong Normal University, Jinan, 250014, China
| | - Bruno Briseghella
- College of Civil Engineering, Fuzhou University, Fuzhou, 350108, China
| | - Chuanzhi Sun
- College of Chemistry, Chemical Engineering and Materials Science, Collaborative Innovation Center of Functionalized Probes for Chemical Imaging in Universities of Shandong, Shandong Provincial Key Laboratory of Clean Production of Fine Chemicals, Institute of Materials and Clean Energy, Shandong Normal University, Jinan, 250014, People's Republic of China.
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Gorito AM, Lado Ribeiro AR, Pereira MFR, Almeida CMR, Silva AMT. Advanced oxidation technologies and constructed wetlands in aquaculture farms: What do we know so far about micropollutant removal? ENVIRONMENTAL RESEARCH 2022; 204:111955. [PMID: 34454936 DOI: 10.1016/j.envres.2021.111955] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/12/2020] [Revised: 08/19/2021] [Accepted: 08/21/2021] [Indexed: 06/13/2023]
Abstract
Aquaculture is the fastest growing animal food-producing sector. Water is the central resource for aquaculture, and it is essential that its quality be preserved. Micropollutants (MPs) can reach aquaculture through anthropogenic addition or inlet water, and may cause harmful effects such as endocrine disruption and antibiotic resistance, adversely affecting the fish species being farmed. Furthermore, the discharge of aquaculture effluents into the environment may contribute to the deterioration of water courses. In this sense, the implementation of environmentally responsible measures in aquaculture farms is imperative for the protection of ecosystems and human health. The European Commission (EC) has recently launched a guiding document promoting ecological aquaculture practices; however, options for water treatment are still lacking. Conventional processes are not designed to deal with MPs; this review article consolidates relevant information on the application of advanced oxidation technologies (AOTs) and constructed wetlands (CWs) as potential strategies in this regard. Although 161 studies on the application of AOTs or CWs in aquaculture have already been published, only 34 focused on MPs (28 on AOTs and 6 on CWs), whereas the others reported the removal of contaminants such as bacteria, organic matter, solids and inorganic ions. No study coupling both treatments has been reported to date for the removal of MPs from aquaculture waters. AOTs and CWs are prospective alternatives for the treatment of aquacultural aqueous matrices. However, the type of aquaculture activity and the specifications of these available technologies should be considered while selecting the most suitable treatment option.
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Affiliation(s)
- Ana M Gorito
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Ana R Lado Ribeiro
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - M Fernando R Pereira
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - C Marisa R Almeida
- Interdisciplinary Centre of Marine and Environmental Research (CIIMAR/CIMAR), Universidade do Porto, Terminal de Cruzeiros do Porto de Leixões, Av. General Norton de Matos s/n, 4450-208, Matosinhos, Portugal.
| | - Adrián M T Silva
- Laboratory of Separation and Reaction Engineering - Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
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Truong TT, Pham TT, Truong TTT, Pham TD. Synthesis, characterization of novel ZnO/CuO nanoparticles, and the applications in photocatalytic performance for rhodamine B dye degradation. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:22576-22588. [PMID: 34792775 DOI: 10.1007/s11356-021-17106-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/09/2021] [Accepted: 10/14/2021] [Indexed: 06/13/2023]
Abstract
Photocatalytic deg radation of environmental pollutants is being up to date for the treatment of contaminated water. In the present study, ZnO/CuO nanomaterials were successfully fabricated by a simple sol-gel method and investigate the photo-degradation of rhodamine B (RhB). The synthesized ZnO/CuO nanoparticles were characterized by X-ray diffraction (XRD), energy-dispersive spectroscopy (EDS), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (UV-Vis-DRS), thermal analysis (TGA), surface charge, and Fourier transform infrared spectroscopy (FTIR). The photo-degradation of the dye RhB was followed spectroscopically. The overall composition of ZnO/CuO material was found to be wurtzite phase, with particle size of 30 nm, and the Vis light absorption increased with an increase of Cu content. The ZnO/CuO nanomaterials were highly active leading to a photo-degradation of 10 ppm RhB reaching 98% within 180 min at 0.1 g/L catalyst dosage. The change in surface charge after degradation evaluated by ζ potential measurements and the differences in functional vibration group monitored by Fourier transform infrared spectroscopy (FTIR) indicates that the RhB adsorption on the Zn45Cu surface was insignificant. And scavenging experiments demonstrate that the RhB degradation by ZnO/CuO nanomaterials involves to some degree hydroxyl radicals.
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Affiliation(s)
- Thi Thao Truong
- Department of Chemistry, TNU-University of Sciences, Tan Thinh Ward, Thai Nguyen City, Thai Nguyen, 250000, Vietnam
| | - Truong Tho Pham
- Laboratory of Magnetism and Magnetic Materials, Science and Technology Advanced Institute, Van Lang University, Ho Chi Minh City, Vietnam
- Faculty of Technology, Van Lang University, Ho Chi Minh City, Vietnam
| | - Thi Thuy Trang Truong
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Hoan Kiem, 1000 00, Vietnam
| | - Tien Duc Pham
- Faculty of Chemistry, University of Science, Vietnam National University, Hanoi, 19 Le Thanh Tong, Hanoi, Hoan Kiem, 1000 00, Vietnam.
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Liao X, Li TT, Ren HT, Zhang X, Shen B, Lin JH, Lou CW. Construction of BiOI/TiO 2 flexible and hierarchical S-scheme heterojunction nanofibers membranes for visible-light-driven photocatalytic pollutants degradation. THE SCIENCE OF THE TOTAL ENVIRONMENT 2022; 806:150698. [PMID: 34600990 DOI: 10.1016/j.scitotenv.2021.150698] [Citation(s) in RCA: 17] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/17/2021] [Revised: 09/22/2021] [Accepted: 09/27/2021] [Indexed: 06/13/2023]
Abstract
Water was the source of life, in order to solve the serious water pollution problem facing the world, researchers have proposed many solutions. Among them, photoelectric catalytic technology based on semiconductor materials was an ideal and sustainable solution. Herein, by combining successive ionic layer adsorption and reaction (SILAR) with sol-gel electrospinning two strategies, a novel S-scheme heterojunction based on flexible and hierarchical BiOI/TiO2 nanofibrous membranes (BiOI/TiO2 NFM) was fabricated. The degradation rates of tetracycline (TC) and Rhodamine B (RHB) were 98.7% and 95.6%, respectively, under visible light irradiation. The main reason, except for the benefits offered by the hierarchical nanofiber structure, such as the large surface area, tightly connected interfaces and more exposed active sites, other advantages derived from photogenerated carrier transfer and superior redox ability were also momentous. To reveal the formed S-scheme heterojunction, a variety of test methods were used to characterize and test. These studies showed a significant increase in charge separation efficiency in the BiOI/TiO2 NFM, and the charge transport of S-scheme heterojunction was demonstrated. This study may offer new design ideas for the design and construction of novel structures of S-scheme heterojunctions.
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Affiliation(s)
- Xilin Liao
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Ting-Ting Li
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; Tianjin and Ministry of Education Key Laboratory for Advanced Textile Composite Materials, Tiangong University, Tianjin 300387, China.
| | - Hai-Tao Ren
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Xuefei Zhang
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Baolei Shen
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China
| | - Jia-Horng Lin
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; Laboratory of Fiber Application and Manufacturing, Department of Fiber and Composite Materials, Feng Chia University, Taichung 40724, Taiwan; School of Chinese Medicine, China Medical University, Taichung, Taiwan
| | - Ching-Wen Lou
- Innovation Platform of Intelligent and Energy-Saving Textiles, School of Textile Science and Engineering, Tiangong University, Tianjin 300387, China; Department of Bioinformatics and Medical Engineering, Asia University, Taichung 41354, Taiwan; Department of Medical Research, China Medical University Hospital, China Medical University, Taichung, Taiwan.
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Phase Transformation, Photocatalytic and Photoluminescent Properties of BiPO4 Catalysts Prepared by Solid-State Reaction: Degradation of Rhodamine B. MINERALS 2021. [DOI: 10.3390/min11091007] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
Polycrystalline bismuth phosphate BiPO4 was synthesized by solid-state reaction at different temperatures varying from 500 to 900 °C. The samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive X-ray analysis (EDS) and Raman spectroscopy. The low-temperature phase of BiPO4 has monoclinic structure with a space group P21/n, and was transformed into the monoclinic phase P21/m with a slight distortion of monoclinic lattice when it was heated above 500 °C. The effect of the transformation on the structure, morphology and photocatalytic properties was examined. The photocatalytic activity of each sample, in presence of Rhodamine B (RhB) in aqueous solution, was carried out and analyzed under UV light irradiation. Photoexperiments showed that the material prepared at 500 °C is the best catalyst with degradation efficiency of the order of 96% after 12 min of reaction time under UV light irradiation. This high photocatalytic efficiency could be due to their structural and morphological changes. The photocatalytic degradation mechanism of RhB in the presence of the best photocatalyst BiP-500 °C is proposed. The stability of the catalyst was also examined by carrying out four successive tests of the degradation in the presence of BiP-500 °C. Total organic carbon (TOC) was used to further estimate the rate of mineralization in the presence of BiP-500 °C (83% TOC removal). Photoluminescence experiments performed under UV-laser light irradiation revealed emissions in the green-orange range, with optimal intensities for the mix systems observed at 550 °C.
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