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Jin J, Dai C, Zeng C, Liu X, Jia Y. Bimetallic Au/Ag coated on In 2O 3 for the effective removal of emerging organic contaminants under natural sunlight irradiation. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 370:122573. [PMID: 39303599 DOI: 10.1016/j.jenvman.2024.122573] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/11/2024] [Revised: 08/26/2024] [Accepted: 09/16/2024] [Indexed: 09/22/2024]
Abstract
Antibiotics-polluted wastewater, likely causing the spread of antibiotic-resistant bacteria (ARB) and antibiotic resistance genes (ARGs), can be effectively remediated by photocatalytic degradation driven by endless solar energy. Herein, bimetallic Au/Ag is deposited on In2O3 surface via a one-step sintering process followed by a controllable chemical reduction approach. Under natural sunlight irradiation, the optimal Au/Ag/In2O3 (UGI-1.0) photocatalyst possesses a considerable norfloxacin (NOR) degradation rate constant of 0.013 min-1, which is 3.25, 1.63, and 1.86 times higher than that of In2O3, Ag/In2O3, and Au/In2O3 respectively. The effect of many water characteristics (e.g., humic acid, water bodies, pH values, and coexisting anions) on the photodegradation performance of NOR over UGI-1.0 is investigated. Moreover, other persistent organic pollutants (ofloxacin, phenol, 2,4-dichlorophenol, and rhodamine B) can also be degraded over UGI-1.0, suggesting its universal oxidation capacity. To settle the challenge of powder photocatalyst recovery, the UGI-1.0 photocatalyst is coated on a frosted glass sheet, which exhibits outstanding activity and stability for degrading NOR. The bimetallic Au/Ag deposited on In2O3 promote its photo-absorption, and enhance its photoinduced charge separation and transfer efficiency by serving as electron accepter, leading to the boosted activity of Au/Ag/In2O3 catalysts. Particularly, the cultivation of staphylococcus aureus (S. aureus) and cabbage seeds reveals the efficient toxicity reduction of NOR by photocatalytic degradation and the nontoxic characteristic of UGI-1.0 catalyst. This work unveils the feasibility of UGI-1.0 to remediate real wastewater with the assistance of solar energy.
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Affiliation(s)
- Jiahui Jin
- School of Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China; College of Chemistry and Materials, Jiangxi Normal University, Nanchang, 330022, China
| | - Chunhui Dai
- Jiangxi Key Laboratory for Mass Spectrometry and Instrumentation, East China University of Technology, Nanchang, 330013, China
| | - Chao Zeng
- School of Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China.
| | - Xin Liu
- School of Chemical Engineering, Jiangxi Normal University, Nanchang, 330022, China
| | - Yushuai Jia
- College of Chemistry and Materials, Jiangxi Normal University, Nanchang, 330022, China.
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Hernández-Tenorio R. Degradation pathways of sulfamethoxazole under phototransformation processes: A data base of the major transformation products for their environmental monitoring. ENVIRONMENTAL RESEARCH 2024; 262:119863. [PMID: 39214487 DOI: 10.1016/j.envres.2024.119863] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 07/23/2024] [Accepted: 08/26/2024] [Indexed: 09/04/2024]
Abstract
Sulfamethoxazole (SMX) is frequently detected in wastewater and aquatic environments worldwide at concentrations from ng L-1 to μg L-1. Unfortunately, SMX is not completely removed in municipal wastewater treatment plants (WWTPs), thus, SMX and their transformation products (TPs) are discharged into aquatic environments, where can be transformed by phototransformation reactions. In this study, the phototransformation of SMX as well as generation of their major TPs under photolysis and photocatalysis processes was reviewed. SMX can be totally removed under photolysis and photocatalysis processes in aqueous solutions using simulated or natural radiation. Degradation pathways such as isomerization, hydroxylation, fragmentation, nitration, and substitution reactions were identified during the generation of the major TPs of SMX. Particularly, 26 TPs were considered for the creation of a data base of the major TPs of SMX generated under phototransformation processes. These 26 compounds could be used as reference during the SMX monitoring both wastewater and water bodies, using analytic methodologies such as target analysis and suspect screening. A data base of the major TPs of pharmaceuticals active compounds (PhACs) as SMX could help to implementation of best environmental monitoring programs for the study of the environmental risks both PhACs and their TPs with highest occurrence in aquatic environments.
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Affiliation(s)
- Rafael Hernández-Tenorio
- Centro de Investigación y Asistencia en Tecnología y Diseño del Estado de Jalisco A.C., Sede Noreste, Vía de la Innovación 404, Autopista Monterrey-Aeropuerto Km 10, Parque PIIT, Apodaca, nuevo León, C.P. 66628, Mexico.
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Seliverstova E, Serikov T, Nuraje N, Ibrayev N, Sadykova A, Amze M. Plasmonic effect of metal nanoparticles on the photocatalytic properties of TiO 2/rGO composite. NANOTECHNOLOGY 2024; 35:325401. [PMID: 38608318 DOI: 10.1088/1361-6528/ad3e02] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/07/2023] [Accepted: 04/12/2024] [Indexed: 04/14/2024]
Abstract
A comparative study of the plasmon effect of Ag and Au nanoparticles on TiO2/rGO nanocomposite was carried out. The synthesis of Au and Ag nanoparticles was carried out by laser ablation. The morphology and structure of the nanocomposites were studied by EDA, HRTEM, XRD and Raman spectroscopy. It was shown that the absorption capacity of the nanocomposite material was increased in the visible range of the spectrum when Ag and Au nanoparticles were added to TiO2/rGO. This leads to an increase in their photocatalytic activity. The photocurrent generated by NC/Au 10-11films is in 3.8 times and NC/Ag 10-12is in 2 times higher compared to pure TiO2/rGO film. Similar results were obtained from experimental data on the dyes photodegradation. In the presence of plasmon nanoparticles a significant enhancement in the electrical properties of the TiO2/rGO nanocomposite was recorded. The charge carrier transfer resistance in nanocomposites was decreased by almost ∼7 times for NC/Au,10-11and ∼4 times for NC/Ag,10-12films compared to pure TiO2/rGO. In addition, for nanocomposites with Ag or Au nanoparticles, a decrease in the effective electron lifetime was observed. The data obtained allow us to conclude that plasmonic NPs have a synergistic effect in TiO2/rGO nanocomposites, which consists in modifying both their light-harvesting properties and charge-transport characteristics. The results obtained can be used for the design of materials with improved photocatalytic and optoelectronic characteristics.
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Affiliation(s)
- Evgeniya Seliverstova
- Institute of Molecular Nanophotonics, Buketov Karaganda University, Universitetskaya str. 28, Karaganda 100024, Kazakhstan
| | - Timur Serikov
- Institute of Molecular Nanophotonics, Buketov Karaganda University, Universitetskaya str. 28, Karaganda 100024, Kazakhstan
| | - Nurxat Nuraje
- Department of Chemical and Materials Engineering, School of Engineering and Digital Science, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
- Renewable Energy Lab, National Laboratory Astana, Nazarbayev University, 53, Astana, 010000, Kazakhstan
| | - Niyazbek Ibrayev
- Institute of Molecular Nanophotonics, Buketov Karaganda University, Universitetskaya str. 28, Karaganda 100024, Kazakhstan
| | - Aigul Sadykova
- Institute of Molecular Nanophotonics, Buketov Karaganda University, Universitetskaya str. 28, Karaganda 100024, Kazakhstan
| | - Magzhan Amze
- Department of Chemical and Materials Engineering, School of Engineering and Digital Science, Nazarbayev University, Kabanbay Batyr Ave. 53, Astana, 010000, Kazakhstan
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Le-Duy N, Hoang LAT, Nguyen TD, Lee T. Pd nanoparticles decorated BiVO 4 pine architectures for photocatalytic degradation of sulfamethoxazole. CHEMOSPHERE 2023; 321:138118. [PMID: 36775029 DOI: 10.1016/j.chemosphere.2023.138118] [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: 10/28/2022] [Revised: 01/30/2023] [Accepted: 02/09/2023] [Indexed: 06/18/2023]
Abstract
Sulfamethoxazole (SMX) has been extensively detected in wastewater treatment plant effluents and surface water. Because of its potential risks to ecology and health, treatment for eliminating SMX is urgently required. In this study, we report the application of Pd nanoparticles decorated on BiVO4 pine architecture for the photocatalytic degradation of SMX. The results showed that the barer BiVO4 and Pd-BiVO4 eliminated SMX under visible-light irradiation. After 210 min of irradiation, 98.8% of SMX was substantially eliminated by Pd-BiVO4, whereas bare BiVO4 can degraded approximately 36.3% of SMX. Pd-BiVO4 also exhibited a high mineralization rate (84% of total organic carbon (TOC) removal) compared to bare BiVO4 (51% of TOC removal). Through three-dimensional excitation-emission matrix fluorescence spectra, SMX with high fluorescence intensity can be degraded to non-fluorescence intermediate products, further confirming the high mineralization of SMX over Pd-BiVO4 catalyst. Well-dispersed Pd nanoparticles on the {040} facet of BiVO4 pine architecture can support the recombination of photogenerated charge carriers because of the formation of the Schottky junction at the Pd-BiVO4 interface. Besides, the active species trapping tests indicated that •O2- and h+ radicals dominate SMX photodegradation over Pd-BiVO4. The main degradation intermediates of SMX in the reaction solution was also identified through ultra-performance liquid chromatography-quadrupole time-of-flight mass spectrometry analysis. This investigation can provide insight into designing metallic/semiconductor junctions for antibiotic elimination in water media.
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Affiliation(s)
- Nhat Le-Duy
- Department of Environmental Engineering, College of Environmental and Marine, Pukyong National University, 45Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Lan-Anh T Hoang
- Department of Environmental Engineering, College of Environmental and Marine, Pukyong National University, 45Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea
| | - Trinh Duy Nguyen
- Department of Environmental Engineering, College of Environmental and Marine, Pukyong National University, 45Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea; Institute of Applied Technology and Sustainable Development, Nguyen Tat Thanh University, Ho Chi Minh City, 700000, Viet Nam.
| | - Taeyoon Lee
- Department of Environmental Engineering, College of Environmental and Marine, Pukyong National University, 45Yongso-ro, Nam-gu, Busan, 48513, Republic of Korea.
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Vanlalhmingmawia C, Tiwari D. Novel cubical Ag(NP) decorated titanium dioxide supported bentonite thin film in the efficient removal of bisphenol A using visible light. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:32942-32956. [PMID: 36472744 DOI: 10.1007/s11356-022-24467-7] [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: 07/11/2022] [Accepted: 11/25/2022] [Indexed: 06/17/2023]
Abstract
The persistent endocrine-disrupting chemical bisphenol A is posing serious health concerns; hence, it is known to be an emerging and potential water contaminant. The present investigation aims to synthesize novel cubical Ag(NP) decorated titanium dioxide-supported bentonite (Ag/TiO2@Clay) nanocomposite using a novel synthetic process. The nanocomposite materials were characterized by several analytical methods viz., transmission electron microscopy (TEM), X-ray diffraction (XRD) analyses, energy-dispersive X-ray spectroscopy (EDX), atomic force microscopy (AFM), scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) and diffuse reflectance spectroscopy (DRS). Further, the photocatalytic removal of bisphenol A was conducted utilizing the thin film catalyst under the LED (light emitting diode; visible light) and UV-A (ultra violet-A) light sources. The parametric studies solution pH (6.0-12.0), pollutant concentrations (1.0-20.0 mg/L), and the interaction of several scavengers and co-existing ions are studied extensively to demonstrate the insights of the removal mechanism. The mineralization of bisphenol A and repeated use of the thin film catalyst showed the potential usage of photocatalysts in the devised large-scale operations. Similarly, the natural matrix treatment was performed to evaluate the suitability of the process for real implications.
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Affiliation(s)
| | - Diwakar Tiwari
- Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796004, India.
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Vanlalhmingmawia C, Tiwari D, Kim DJ. Novel nanocomposite thin film in the efficient removal of antibiotics using visible light: Insights of photocatalytic reactions and stability of thin film in real water implications. ENVIRONMENTAL RESEARCH 2023; 218:115007. [PMID: 36493806 DOI: 10.1016/j.envres.2022.115007] [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: 09/29/2022] [Revised: 11/28/2022] [Accepted: 12/05/2022] [Indexed: 06/17/2023]
Abstract
Novel clay (bentonite) supported Ag0 nanoparticles (NPs) doped TiO2 nanocomposite (Clay/TiO2/Ag0(NPs)) thin film was obtained by using template synthesis method. The nanocomposite material is decorated with cubical Ag0(NPs) and utilised successfully in the photocatalytic degradation of tetracycline (TC) and sulfamethazine (SMZ) from aqueous solutions utilizing visible light and UV-A radiations. Scanning electron microscopy (SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDX), X-ray diffraction (XRD), Brunauer-Emmett-Teller (BET), X-ray photoelectron spectroscopy (XPS) analyses were used to characterise the nanocomposite materials. Diffusion reflectance spectroscopy (DRS) was utilised to determine the bandgap energies of the materials and also to confirm that Ag0(NPs) was successfully doped with TiO2. The nanocomposite material showed highly efficient photocatalytic activity for the breaking down of TC/SMZ under visible light irradiation by the enhanced electron-hole separation and adsorption of antibiotics at the vicinity of the catalyst. The oxidative degradation of TC/SMZ were shown to be highly dependent on the pH, initial concentration of TC/SMZ, and various co-existing ions. Reusability test of Clay/Ag0(NPs)/TiO2 nanocomposite revealed that the activity did not decline with repeated use. Treatment of TC and SMZ in real water system further enhanced the application potential of the novel catalysts for the treatment of full-scale wastewater polluted with these antibiotics.
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Affiliation(s)
| | - Diwakar Tiwari
- Department of Chemistry, School of Physical Sciences, Mizoram University, Aizawl-796004, India.
| | - Dong-Jin Kim
- Department of Environmental Sciences and Biotechnology & Institute of Energy and Environment, Hallym University, Chuncheon 24252, Republic of Korea.
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Musial J, Mlynarczyk DT, Stanisz BJ. Photocatalytic degradation of sulfamethoxazole using TiO 2-based materials - Perspectives for the development of a sustainable water treatment technology. THE SCIENCE OF THE TOTAL ENVIRONMENT 2023; 856:159122. [PMID: 36183772 DOI: 10.1016/j.scitotenv.2022.159122] [Citation(s) in RCA: 18] [Impact Index Per Article: 18.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/05/2022] [Revised: 09/11/2022] [Accepted: 09/25/2022] [Indexed: 06/16/2023]
Abstract
Heterogeneous photocatalysis using titanium dioxide-based materials is considered a promising and innovative solution to the water pollution problem. However, due to the limitations concerning the use of the developed materials and the applied photodegradation conditions, the research on photoremediation using TiO2 often stays behind the lab door. The challenge is to convert the basic research into a successful innovation, leading to the implementation of this process into wastewater treatment. For this purpose, the most active materials and optimal photodegradation conditions must be chosen. This article collects and compares the studies on photocatalytic degradation of an emerging pollutant - sulfamethoxazole, an antibacterial drug - and attempts to find the best approaches to be successfully applied on an industrial scale. Various types of TiO2-based photocatalysts are compared, including different nanoforms, doped or polymer-based composites, composites with graphene, activated carbon, dyes or natural compounds, as well as possible supporting materials for TiO2. The paper covers the impact of the irradiation source (natural sunlight, LED, mercury or xenon lamps) and water matrix on the photodegradation process, considering the ecological and economic sustainability of the process. Emphasis is put on the stability, ease of separation and reuse of the photocatalyst, power and safety of the irradiation source, identification of photodegradation intermediates and toxicity assays. The main approaches are critically discussed, main challenges and perspectives for an effective photocatalytic water treatment technology are pointed out.
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Affiliation(s)
- Joanna Musial
- Chair and Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznań, Poland
| | - Dariusz T Mlynarczyk
- Chair and Department of Chemical Technology of Drugs, Faculty of Pharmacy, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznań, Poland
| | - Beata J Stanisz
- Chair and Department of Pharmaceutical Chemistry, Faculty of Pharmacy, Poznan University of Medical Sciences, Grunwaldzka 6, 60-780 Poznań, Poland.
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Zaouak A, Chouchane H, Jelassi H. Kinetic and mechanism investigation on the gamma irradiation induced degradation of quizalofop-p-ethyl. ENVIRONMENTAL TECHNOLOGY 2022; 43:4147-4155. [PMID: 34182888 DOI: 10.1080/09593330.2021.1944325] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/13/2021] [Accepted: 06/09/2021] [Indexed: 06/13/2023]
Abstract
An efficient gamma radiolytic decomposition of one of the extensively used herbicides in the world quizalofo-p-ethyl (QPE) was explored under different experimental conditions. Aqueous solutions of QPE were irradiated by gamma rays emitted by a Cobalt 60 source. QPE aqueous solutions were irradiated at doses of 0.5-3 kGy with 26.31 Gy min-1 dose rate. Obtained results indicated that removal efficiency of 98.5% and 73% of QPE were obtained, respectively, in absence and in presence of dissolved oxygen. Change of absorption spectra, pH effect and Total Organic Carbon (TOC) were carried out and studied. It was found that all absorption bands decreased with increasing irradiation dose and disappear totally after 3 kGy applied dose. Three pH conditions (pH = 10, pH = 6.2 and pH = 3) were applied in radiolytic degradation of QPE showing that the best removal efficiency has been found for neutral pH. Interestingly, the % TOC removal reaches 98% at 3 kGy indicated practically total mineralization. Furthermore, spectrophotometric analyses argued in favour of a pseudo-first-order kinetic of QPE degradation. The resulting apparent rate constant value is approximately kapp = (0.012 ± 0.001) min-1. Finally, several by-products such as 6-chloroquinoxalin -2-ol, 2-(4-hydroxy-phenyoxy) propionate, 1,4-hydroquinone, quinone, 4-chlorobenzene-1,2diol and 1,2,4-benzenetriol were identified by gas chromatography-mass spectrometry (GC/MS) evidencing that radiation process starting with the fragmentation of the molecule involving the hydroxyl radical, which is generated by the radiolysis of water. Based on the identification intermediates, a degradation mechanistic schema of QPE has been proposed.
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Affiliation(s)
- Amira Zaouak
- Research Laboratory on Energy and Matter for Nuclear Science Development (LR16CNSTN02), National Center for Nuclear Science and Technologies, Tunis, Tunisia
| | - Habib Chouchane
- Univ. Manouba, ISBST, LR11-ES31 BVBGR, Biotechpole Sidi Thabet, Ariana, Tunisia
| | - Haikel Jelassi
- Research Laboratory on Energy and Matter for Nuclear Science Development (LR16CNSTN02), National Center for Nuclear Science and Technologies, Tunis, Tunisia
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Alegbeleye O, Daramola OB, Adetunji AT, Ore OT, Ayantunji YJ, Omole RK, Ajagbe D, Adekoya SO. Efficient removal of antibiotics from water resources is a public health priority: a critical assessment of the efficacy of some remediation strategies for antibiotics in water. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2022; 29:56948-57020. [PMID: 35716301 DOI: 10.1007/s11356-022-21252-4] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/26/2021] [Accepted: 05/30/2022] [Indexed: 05/27/2023]
Abstract
This review discusses the fundamental principles and mechanism of antibiotic removal from water of some commonly applied treatment techniques including chlorination, ozonation, UV-irradiation, Fenton processes, photocatalysis, electrochemical-oxidation, plasma, biochar, anaerobicdigestion, activated carbon and nanomaterials. Some experimental shortfalls identified by researchers such as certain characteristics of degradation agent applied and the strategies explored to override the identified limitations are briefly discussed. Depending on interactions of a range of factors including the type of antibiotic compound, operational parameters applied such as pH, temperature and treatment time, among other factors, all reviewed techniques can eliminate or reduce the levels of antibiotic compounds in water to varying extents. Some of the reviewed techniques such as anaerobic digestion generally require longer treatment times (up to 360, 193 and 170 days, according to some studies), while others such as photocatalysis achieved degradation within short contact time (within a minimum of 30, but up to 60, 240, 300 and 1880 minutes, in some cases). For some treatment techniques such as ozonation and Fenton, it is apparent that subjecting compounds to longer treatment times may improve elimination efficiency, whereas for some other techniques such as nanotechnology, application of longer treatment time generally meant comparatively minimal elimination efficiency. Based on the findings of experimental studies summarized, it is apparent that operational parameters such as pH and treatment time, while critical, do not exert sole or primary influence on the elimination percentage(s) achieved. Elimination efficiency achieved rather seems to be due more to the force of a combination of several factors.
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Affiliation(s)
- Oluwadara Alegbeleye
- Department of Food Science and Nutrition, University of Campinas (UNICAMP), Rua Monteiro Lobato, 80, Campinas, SP, 13083-862, Brazil.
| | | | - Adewole Tomiwa Adetunji
- Department of Agriculture, Faculty of Applied Sciences, Cape Peninsula University of Technology, Wellington, Western Cape, 7654, South Africa
| | - Odunayo T Ore
- Department of Chemistry, Obafemi Awolowo University, Ile-Ife, Nigeria
| | - Yemisi Juliet Ayantunji
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
- Advanced Space Technology Applications Laboratory, Cooperative Information Network, National Space Research and Development Agency, Ile-Ife, P.M.B. 022, Nigeria
| | - Richard Kolade Omole
- Department of Microbiology, Obafemi Awolowo University, Ile-Ife, Nigeria
- Microbiology Unit, Department of Applied Sciences, Osun State College of Technology, Esa-Oke, Nigeria
| | - Damilare Ajagbe
- Department of Microbiology and Molecular Genetics, Oklahoma State University, Oklahoma, USA
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Zaouak A, Chouchane H, Jelassi H. Gamma irradiation-induced degradation and mineralization of methocarbamol in aqueous solution. ENVIRONMENTAL TECHNOLOGY 2022:1-8. [PMID: 35200109 DOI: 10.1080/09593330.2022.2046646] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/11/2021] [Accepted: 02/16/2022] [Indexed: 06/14/2023]
Abstract
Gamma irradiation degradation of the extensively used muscle relaxant in the world methocarbamol (MET) was studied. MET aqueous solutions were irradiated by gamma rays emitted by a Cobalt 60 source at doses of 1-4 kGy. Our findings demonstrated that gamma irradiation degraded more than 98.5% of MET. Absorption spectra analysis revealed that when increased irradiation dose, the absorption bands declined with complete disappearance at 4 kGy dose. Additionally, the most radiolytic degradation rate was recorded at neutral pH, marked by Total Organic Carbon (TOC) removal rate of 98% reflecting the total mineralization of MET at 4 kGy. In-depth spectrophotometric analyses advocated a pseudo-first-order type of MET degradation kinetics. The obtained apparent rate constant value was kapp, MET = (0.02167 ± 0.0006) min-1. Gas chromatography-mass spectrometry (GC-MS) allowed the detection of 3-(o-methoxyphenoxy)-1,2 propanediol,2-methoxyphenol, 1,2,3 propanetriol, 1,2-dihydroxybenzene and 1,2,4 benzentriol identified as by-products generated during radiolytic degradation. Finally, an outline of the degradation mechanism was suggested according to the obtained by-products.
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Affiliation(s)
- Amira Zaouak
- Research Laboratory on Energy and Matter for Nuclear Science Development (LR16CNSTN02), National Center for Nuclear Science and Technologies, Sidi Thabet Technopark 2020, Tunis, Tunisia
| | - Habib Chouchane
- University Manouba, ISBST, LR11-ES31 BVBGR, Biotechpole Sidi Thabet, 2020, Ariana, Tunisia
| | - Haikel Jelassi
- Research Laboratory on Energy and Matter for Nuclear Science Development (LR16CNSTN02), National Center for Nuclear Science and Technologies, Sidi Thabet Technopark 2020, Tunis, Tunisia
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11
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Suzuki N, Okazaki A, Takagi K, Serizawa I, Hirami Y, Noguchi H, Pitchaimuthu S, Terashima C, Suzuki T, Ishida N, Nakata K, Katsumata KI, Kondo T, Yuasa M, Fujishima A. Complete decomposition of sulfamethoxazole during an advanced oxidation process in a simple water treatment system. CHEMOSPHERE 2022; 287:132029. [PMID: 34474387 DOI: 10.1016/j.chemosphere.2021.132029] [Citation(s) in RCA: 7] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/22/2021] [Revised: 08/22/2021] [Accepted: 08/24/2021] [Indexed: 06/13/2023]
Abstract
A simple water treatment system consisting of a deep UV light (λ = 222 nm) source, a mesoporous TiO2/boron-doped diamond (BDD) photocatalyst, and a BDD electrode was prepared and used to decompose sulfamethoxazole (SMX) in an advanced oxidation process. The mesoporous TiO2/BDD photocatalyst used with the electrochemical treatment promoted SMX decomposition, but the mesoporous TiO2/BDD photocatalyst alone had a similar ability to decompose SMX as photolysis. Fragments produced through photocatalytic treatment were decomposed during the electrochemical treatment and fragments produced during the electrochemical treatment were decomposed during the photocatalytic treatment, so performing the electrochemical and photocatalytic treatments together effectively decomposed SMX and decrease the total organic carbon concentration to a trace.
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Affiliation(s)
- Norihiro Suzuki
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan.
| | - Akihiro Okazaki
- ORC Manufacturing Co., Ltd, 4896 Tamagawa, Chino, Nagano, 391-0011, Japan
| | - Kai Takagi
- ORC Manufacturing Co., Ltd, 4896 Tamagawa, Chino, Nagano, 391-0011, Japan
| | - Izumi Serizawa
- ORC Manufacturing Co., Ltd, 4896 Tamagawa, Chino, Nagano, 391-0011, Japan
| | - Yuki Hirami
- Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Hiroya Noguchi
- Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Sudhagar Pitchaimuthu
- Materials Research Center, College of Engineering, Swansea University, Swansea SA1 8EN, Wales, UK
| | - Chiaki Terashima
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Tomonori Suzuki
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Naoya Ishida
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Kazuya Nakata
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Ken-Ichi Katsumata
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Advanced Engineering, Tokyo University of Science, 6-3-1, Niijyuku, Katsushika, Tokyo, 125-8585, Japan
| | - Takeshi Kondo
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Makoto Yuasa
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan; Faculty of Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
| | - Akira Fujishima
- Research Institute for Science and Technology, Tokyo University of Science, 2641 Yamazaki, Noda, Chiba, 278-8510, Japan
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Bisaria K, Sinha S, Singh R, Iqbal HMN. Recent advances in structural modifications of photo-catalysts for organic pollutants degradation - A comprehensive review. CHEMOSPHERE 2021; 284:131263. [PMID: 34198058 DOI: 10.1016/j.chemosphere.2021.131263] [Citation(s) in RCA: 34] [Impact Index Per Article: 11.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/14/2020] [Revised: 06/10/2021] [Accepted: 06/15/2021] [Indexed: 02/08/2023]
Abstract
Over the last few years, industrial and anthropogenic activities have increased the presence of organic pollutants such as dyes, herbicides, pesticides, analgesics, and antibiotics in the water that adversely affect human health and the environment worldwide. Photocatalytic treatment is considered a promising, economical, effective, and sustainable process that utilizes light energy to degrade the pollutants in water. However, certain drawbacks like rapid recombination and low migration capability of photogenerated electrons and holes have restricted the use of photo-catalysts in industries. Hence, despite the abundance of lab-scale research, the technology is still not much commercialized in the mainstream. Several structural modifications in the photo-catalysts have been adopted to enhance the pollutant degradation performance to overcome the same. In this context, the present review article outlines the different advanced heterostructures synthesized to date for improved degradation of three major organic pollutants: antibiotics, dyes, and pesticides. Moreover, the article also emphasizes the degradation kinetics of photo-catalysts and the publication trend in the past decade along with the roadblocks preventing the transfer of technology from the laboratory to industry and new age photo-catalysts for the profitable implications in industrial sectors.
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Affiliation(s)
- Kavya Bisaria
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, India
| | - Surbhi Sinha
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, India
| | - Rachana Singh
- Amity Institute of Biotechnology, Amity University Uttar Pradesh, India.
| | - Hafiz M N Iqbal
- Tecnologico de Monterrey, School of Engineering and Sciences, Monterrey, 64849, Mexico.
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Kadiya K, Vuggili SB, Gaur UK, Sharma M. Comparative photocatalytic dye and drug degradation study using efficient visible light-induced silver phosphate nanoparticles. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2021; 28:46390-46403. [PMID: 33010013 DOI: 10.1007/s11356-020-10982-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 09/23/2020] [Indexed: 06/11/2023]
Abstract
The industrialization, growing population, and human activities (e.g., liquid waste of households, industrial units, and agricultural lands) are the main causes to contaminate fresh water sources. To overcome this issue, many techniques have been applied for water purification and chemical oxidation is one of the effective ways to treat the wastewater called as advanced oxidation process (AOPs). In the present study, synthesized silver phosphate nanoparticles were employed as catalysts in the photocatalytic advanced oxidation process for the degradation of various dyes (RhB, MB, MO, and OG) and drug (SMZ). The photocatalyst was characterized through different analytical tools, e.g., PXRD, FTIR, UV-Vis DRS, DLS, FESEM, and HRTEM. The chemical behavior or interaction of dye molecule with catalyst surface has also been explored to understand the mechanism of photodegradation reaction. All the organic dyes and drugs showed pseudo first-order rate kinetics and it was found that RhB dye and SMZ drug degraded so fast by the photocatalyst. The maximum observed photodegradation rate was 0.0744 min-1 for SMZ drug and 0.0532 min-1 for RhB dye, respectively. The minimum dye degradation was observed ~ 0.0036 min-1 for OG, which is ~ 15 times lesser than the degradation rate of RhB dye. From the comparative dye degradation study, it was found that the photodegradation efficiency of organic pollutants depends on the surface charge of the photocatalyst. The role of photogenerated reactive species (holes, superoxides, and hydroxyl free radicals) was also studied using different types of scavengers which helped to understand the photochemical reactions and mechanism by photocatalyst. The real sample analysis of textile effluent was also performed using the best photocatalyst in the presence of light.
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Affiliation(s)
- Kaushal Kadiya
- School of Nano Sciences, Central University of Gujarat, Gandhinagar, Gujarat, 382030, India
| | - Sai Bhargava Vuggili
- School of Nano Sciences, Central University of Gujarat, Gandhinagar, Gujarat, 382030, India
| | - Umesh Kumar Gaur
- Dr BR Ambedkar National Institute of Technology, Jalandhar, Punjab, India
| | - Manu Sharma
- School of Nano Sciences, Central University of Gujarat, Gandhinagar, Gujarat, 382030, India.
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Fard NE, Fazaeli R, Yousefi M, Abdolmohammadi S. Oxidative Desulfurization of Dibenzothiophene Using M/TiO2/MWW (M = Cu, Ag, and Au) Composite. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2021. [DOI: 10.1134/s0036024421140065] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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15
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Nguyen XS, Pham TD, Vo HT, Ngo KD. Photocatalytic degradation of cephalexin by g-C 3N 4/Zn doped Fe 3O 4 under visible light. ENVIRONMENTAL TECHNOLOGY 2021; 42:1292-1301. [PMID: 31496447 DOI: 10.1080/09593330.2019.1665110] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/09/2019] [Accepted: 09/02/2019] [Indexed: 06/10/2023]
Abstract
In this work, we reported synthesis of a novel magnetically separable g-C3N4/Zn doped Fe3O4 composite (g-CN/ZnFe) by a simple polyol thermal method. The characteristics of the as-prepared composite was checked by XRD, SEM, TEM, XPS, PL technologies. The optimized weight ratio of g-C3N4 and Zn doped Fe3O4 was investigated. In addition, the photocatalytic activities of the composite products were checked by degradation of Cephalexin (CEX) under visible light. The results showed that g-CN/ZnFe composite with an added 20% g-C3N4 exhibited the highest photocatalytic activity for cephalexin under visible light irradiation. The improved photocatalytic activity of 20% g-CN/ZnFe can be ascribed to the low combination rate of photoinduced electron/hole pairs. Especially, g-CN/ZnFe can be recovered easily by using an external magnetic field and has the high stability after six runs. These properties of the g-CN/ZnFe as-prepared composite could be a promising photocatalyst for the degradation of pharmaceutical contaminants.
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Affiliation(s)
- Xuan Sang Nguyen
- Environmental Institute, Viet Nam Maritime University, Haiphong, Vietnam
| | - Tien Dung Pham
- Environmental Institute, Viet Nam Maritime University, Haiphong, Vietnam
| | - Hoang Tung Vo
- Environmental Institute, Viet Nam Maritime University, Haiphong, Vietnam
| | - Kim Dinh Ngo
- Environmental Institute, Viet Nam Maritime University, Haiphong, Vietnam
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16
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Yang L, Li L, Li L, Liu C, Li J, Lai B, Li N. N/Fe/Zn co-doped TiO 2 loaded on basalt fiber with enhanced photocatalytic activity for organic pollutant degradation. RSC Adv 2021; 11:4942-4951. [PMID: 35424425 PMCID: PMC8694681 DOI: 10.1039/d0ra10102h] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2020] [Accepted: 01/12/2021] [Indexed: 11/21/2022] Open
Abstract
To avoid the loss of catalytic material powder, a loaded catalytic material of TiO2 with basalt fiber as the carrier (TiO2@BF) was synthesized by an improved sol-gel method. The TiO2@BF was doped with different contents of N, Fe and Zn elements and was used to degrade rhodamine B (RhB) under ultraviolet light. The physical characterization analysis indicated that the co-doping of the N, Fe and Zn elements had the effects of reducing grain size, increasing sample surface area, and narrowing the electronic band gap. The electronic band gap of nitrogen-iron-zinc co-doped TiO2@BF (N/Fe/Zn_TiO2@BF) was 2.80 eV, which was narrower than that of TiO2@BF (3.11 eV). The degradation efficiency of RhB with N/Fe/Zn_TiO2@BF as a photocatalyst was 4.3 times that of TiO2@BF and its photocatalytic reaction was a first-order kinetic reaction. Quenching experiments suggested that the reactive species mainly include photoinduced holes (h+), superoxide radicals (˙O2 -) and hydroxyl radicals (˙OH). In brief, this study provides a prospective loaded catalytic material and routine for the degradation of organic contaminants in water by a photocatalytic process.
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Affiliation(s)
- Lingxiao Yang
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
| | - Lanmiao Li
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
| | - Longguo Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University Chengdu Sichuan 610065 China
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
| | - Chao Liu
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University Chengdu Sichuan 610065 China
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
| | - Jun Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University Chengdu Sichuan 610065 China
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
| | - Bo Lai
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University Chengdu Sichuan 610065 China
- Sino-German Centre for Water and Health Research, Sichuan University Chengdu 610065 China
| | - Naiwen Li
- State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University Chengdu Sichuan 610065 China
- College of Water Resource & Hydropower, Sichuan University Chengdu Sichuan 610065 China
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Gopinath KP, Madhav NV, Krishnan A, Malolan R, Rangarajan G. Present applications of titanium dioxide for the photocatalytic removal of pollutants from water: A review. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2020; 270:110906. [PMID: 32721341 DOI: 10.1016/j.jenvman.2020.110906] [Citation(s) in RCA: 112] [Impact Index Per Article: 28.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/22/2020] [Revised: 04/26/2020] [Accepted: 06/01/2020] [Indexed: 05/20/2023]
Abstract
The evolution of modern technology and industrial processes has been accompanied by an increase in the utilization of chemicals to derive new products. Water bodies are frequently contaminated by the presence of conventional pollutants such as dyes and heavy metals, as well as microorganisms that are responsible for various diseases. A sharp rise has also been observed in the presence of new compounds heretofore excluded from the design and evaluation of wastewater treatment processes, categorized as "emerging pollutants". While some are harmless, certain emerging pollutants possess the ability to cause debilitating effects on a wide spectrum of living organisms. Photocatalytic degradation has emerged as an increasingly popular solution to the problem of water pollution due to its effectiveness and versatility. The primary objective of this study is to thoroughly scrutinize recent applications of titanium dioxide and its modified forms as photocatalytic materials in the removal and control of several classes of water pollutants as reported in literature. Different structural modifications are used to enhance the performance of the photocatalyst such as doping and formation of composites. The principles of these modifications have been scrutinized and evaluated in this review in order to present their advantages and drawbacks. The mechanisms involved in the removal of different pollutants through photocatalysis performed by TiO2 have been highlighted. The factors affecting the mechanism of photocatalysis and those affecting the performance of different TiO2-based photocatalysts have also been thoroughly discussed, thereby presenting a comprehensive view of all aspects involved in the application of TiO2 to remediate and control water pollution.
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Affiliation(s)
| | - Nagarajan Vikas Madhav
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Abhishek Krishnan
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Rajagopal Malolan
- Department of Chemical Engineering, SSN College of Engineering, Kalavakkam, Chennai, 603110, Tamil Nadu, India
| | - Goutham Rangarajan
- Department of Chemical Engineering & Applied Chemistry, University of Toronto, 200 College Street, Ontario, M5S 3E5, Canada
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Ye Y, Yang H, Zhang H, Jiang J. A promising Ag 2CrO 4/LaFeO 3 heterojunction photocatalyst applied to photo-Fenton degradation of RhB. ENVIRONMENTAL TECHNOLOGY 2020; 41:1486-1503. [PMID: 30339485 DOI: 10.1080/09593330.2018.1538261] [Citation(s) in RCA: 26] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/05/2023]
Abstract
Ag2CrO4 nanoparticles (10-35 nm) were assembled onto LaFeO3 nanoparticles (20-60 nm) via a facile chemical precipitation method to form novel Ag2CrO4-LaFeO3 heterojunction composite photocatalysts. The prepared Ag2CrO4-LaFeO3 composites were characterized by XRD, SEM, TEM, XPS, BET, UV-vis DRS, PL spectroscopy and EIS and photocurrent response. The TEM result clearly shows that Ag2CrO4 particles are decorated onto LaFeO3 particles to form Ag2CrO4-LaFeO3 heterojunction. Compared to bare LaFeO3, the 10%Ag2CrO4-LaFeO3 composite exhibits a slightly increased BET specific surface area, increased photocurrent density, decreased charge-transfer resistance and decreased PL emission peaks. Using simulated sunlight as the light source and in the presence of H2O2, the photo-Fenton performance of the composite photocatalysts toward the degradation of RhB was investigated, revealing that they manifest significantly enhanced photo-Fenton degradation of RhB when compared with bare LaFeO3 and Ag2CrO4. Among the composite photocatalysts, 10%Ag2CrO4-LaFeO3 exhibits the highest photo-Fenton activity, which is about 3.1 and 2.5 times higher than that of bare LaFeO3 and Ag2CrO4, respectively. This is attributed to the fact that the composite photocatalysts have highly efficient separation of photogenerated electron-hole pairs due to the formation of Ag2CrO4-LaFeO3 heterojunctions. Active species trapping experiments and ·OH detection experiments were carried out, from which it is concluded that ·OH radicals are the dominant reactive species causing the dye degradation. A synergistic mechanism was proposed to elucidate the enhanced photo-Fenton activity of Ag2CrO4-LaFeO3 heterojunction composites.
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Affiliation(s)
- Yongchun Ye
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
- School of Science, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Hua Yang
- State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
- School of Science, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Haimin Zhang
- School of Science, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
| | - Jinling Jiang
- School of Science, Lanzhou University of Technology, Lanzhou 730050, People's Republic of China
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Rouibah I, Zeghioud H, Khellaf N, Aymen AASSADI, Benmansour H, Djelal H, Amrane A. Intensified Photocatalytic Degradation of Solophenyl Scarlet BNLE in Simulated Textile Effluents Using TiO2 Supported on Cellulosic Tissue. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2020. [DOI: 10.1515/ijcre-2019-0117] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
AbstractThe Heterogeneous photocatalysis, increasingly used in effluent purification, is attracting more and more attention by the development of new photocatalytic materials based on semiconductors deposited on various supports. In this work, TiO2 supported on cellulosic fiber was prepared and characterized by different analytical techniques such as X-ray Photoelectron Spectrometry and Brunauer-Emmett-Teller surface area. Its photocatalytic activity was investigated for the degradation of Solophenyl Scarlet BNLE (SS), an organic pollutant present in textile effluents. Several conditions were investigated such as adsorption under UV and visible irradiation, catalyst recyclability, the simulated effluent pH and the presence of H2O2 as an oxidant agent. Results showed that under UV light, the removal of SS decreased significantly with increasing initial dye concentration. For an initial concentration of 5 mg/L, SS degradation was reached more than 95 % after 2 hours of treatment (neutral pH, T = 20 °C). The supported TiO2 on cellulose remains effective over four cycles of dye treatment. In the presence of H2O2, the degradation process was inhibited with increasing the molar ratio [H2O2]/[SS]0 from 5 to 30. The kinetic modeling showed that the removal of this pollutant followed a pseudo-first-order model (Langmuir-Hinshelwood) with a regression coefficient (R2) value of 0.984.
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Affiliation(s)
- Ikram Rouibah
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Hichem Zeghioud
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Nabila Khellaf
- Department of Process Engineering, Faculty of Engineering, Badji Mokhtar University, P.O. Box 12, Annaba23000, Algeria
| | - Amine ASSADI Aymen
- ENSCR, University of Rennes 1, 11 Allée de Beaulieu, CS 50837, Rennes 35708Rennes, France
- Ille et Vilaine, ecole de chimie de Rennes, 11 allée de Beaulieu, Rennes35700, France
| | - Hédi Benmansour
- Unité de Recherche Analyses et Procédés Appliqués à l‘Environnement UR17ES32 ISSAT Mahdia, Mahdia, Tunisia
- ISSAT Mahdia, Mahdia, Tunisia
| | - Hayet Djelal
- Unilasalle-Ecole des Métiers de l’Environnement, Campus de Ker Lann, 35170 Bruz, FranceBruz, France
- Ecole nationale superieure de chimie de Rennes, Rennes, Bretagne, France
| | - Abdeltif Amrane
- ENSCR, University of Rennes 1, 11 Allée de Beaulieu, CS 50837, Rennes 35708Rennes, France
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Yu H, Wang S, Zhang Z, Chen S, Quan X, Liang H. Fabrication of a double-helical photocatalytic module for disinfection and antibiotics degradation. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2019; 91:918-925. [PMID: 31033067 DOI: 10.1002/wer.1132] [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: 03/28/2019] [Revised: 04/18/2019] [Accepted: 04/22/2019] [Indexed: 06/09/2023]
Abstract
A double-helical photocatalytic module was fabricated via an annealing process following an anodic oxidation procedure, and installed into a commercial UV sterilizer to structure continuous-flow photocatalytic device. Benefiting from the superior mass transfer of double-helical structure to common flat plate or corrugated plate, as well as the improved adhesion between Ti support and TiO2 layer, the photocatalytic device displayed potential in practical disinfection and degradation of organics. During photocatalytic disinfection process with 21 mJ/cm2 of UV dose, the concentration of Escherichia coli decreased from 1.71 × 107 CFU/L (typical for municipal wastewater) in influent to 2,720 CFU/L in effluent water, which met the wastewater discharged standard of China. Escherichia coli reactivation ratio for the photocatalytic device was only one-tenth of that for UV sterilizer. Furthermore, taking phenol, bisphenol A, and four antibiotics as targets, the device was demonstrated to promote the degradation of photodegradable pollutants via photocatalysis. These results highlight a feasibility of photocatalytic technology as a supporting role in practical wastewater treatment. PRACTITIONER POINTS: TiO2 nanotube array was embedded in the surface of double-helical Ti support to avoid detachment. This double-helical photocatalytic module was installed into a commercial UV sterilizer to structure a continuous-flow device. The continuous-flow device was effective in sterilizing bacteria and decomposing photodegradable organic pollutants in wastewater. Improving the performance of UV technology was proposed as a feasible approach for the practical application of photocatalysis.
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Affiliation(s)
- Hongtao Yu
- Key Laboratory of Industrial Ecology and Environment Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Shi Wang
- Key Laboratory of Industrial Ecology and Environment Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
- Water Business Division, ACRE Coking & Refractory Engineering Consulting Corporation, MCC, Dalian, China
| | - Zhenhua Zhang
- Key Laboratory of Industrial Ecology and Environment Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Shuo Chen
- Key Laboratory of Industrial Ecology and Environment Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Xie Quan
- Key Laboratory of Industrial Ecology and Environment Engineering (Ministry of Education, China), School of Environmental Science and Technology, Dalian University of Technology, Dalian, China
| | - Heng Liang
- State Key Laboratory of Urban Water Resource and Environment (SKLUWRE), School of Environment, Harbin Institute of Technology, Harbin, China
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Synthesis and Characterization of the All Solid Z-Scheme Bi2WO6/Ag/AgBr for the Photocatalytic Degradation of Ciprofloxacin in Water. Top Catal 2019. [DOI: 10.1007/s11244-019-01190-1] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/03/2023]
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Abstract
Application of solar photocatalysis for water treatment is intensively studied. In this work, we investigated TiO2 modified with platinum (Pt/TiO2) and palladium (Pd/TiO2) using sulfamethoxazole (SMX) as the model contaminant. We considered the following parameters: (i) level of TiO2 modification with Pt/Pd, (ii) initial concentration of photocatalysts, (iii) geographic location where processes were conducted, and (iv) natural water matrix. The catalysts characterized by SEM, EDX, DRS, and XRD techniques showed successful deposition of Pd and Pt atoms on TiO2 surface that enabled light absorption in the visible (Vis) range, and therefore caused efficient SMX removal in all tested conditions. A comparison of the rate constants of SMX degradation in various conditions revealed that modification with Pd gave better results than modification with Pt, which was explained by the better optical properties of Pd/TiO2. The removal of SMX was higher with Pd/TiO2 than with Pt/TiO2, independent of the modification level. In the experiments with the same modification level, similar rate constants were achieved when four times the lower concentration of Pd/TiO2 was used as compared with Pt/TiO2. Formation of four SMX transformation products was confirmed, in which both amine groups are involved in photocatalytic oxidation. No toxic effect of post-reaction solutions towards Lepidium sativum was observed.
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Effect of Different Radiation Sources and Noble Metal Doped onto TiO2 for Contaminants of Emerging Concern Removal. WATER 2019. [DOI: 10.3390/w11050894] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Water scarcity is a worldwide problem boosted by global warming and pollution of anthropogenic origin. The contaminants of emerging concern in water sources are increasing due to the inefficiency of conventional wastewater treatments, and these should be mitigated. Advanced oxidation processes appear as suitable solutions for decontamination. The photocatalytic oxidation of the mixture of sulfamethoxazole, carbamazepine and lorazepam was investigated. TiO2 modified by Ag and TiO2 modified by Pd were used as photocatalysts to improve photoactivity. The impact of light wavelengths was examined using UVA and visible radiation as well as natural sunlight. Visible light revealed the lowest ability for decontamination in 60 min of irradiation through Ag and Pd–TiO2 photocatalytic oxidation. On the other hand, UVA and sunlight in the presence of photocatalysts were able to totally remove the contaminants. This can be related to the high production of reactive oxidative species at those conditions. The increase of the noble metal load promotes the improvement of the decontamination efficiency. The kinetic rate was analyzed for UVA and sunlight radiation for different photocatalytic conditions. The presence of a natural light source without energy costs leads to an increase in the pseudo-first-order kinetic constant. Sunlight radiation with a suitable photocatalyst can be a very good option for water decontamination.
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Wang J, Liu B, Nakata K. Effects of crystallinity, {001}/{101} ratio, and Au decoration on the photocatalytic activity of anatase TiO2 crystals. CHINESE JOURNAL OF CATALYSIS 2019. [DOI: 10.1016/s1872-2067(18)63174-2] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
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