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Sathya PM, Mohan H, Park JH, Seralathan KK, Cho M, Oh BT. Bio-electrochemical degradation of carbamazepine (CBZ): A comprehensive study on effectiveness, degradation pathway, and toxicological assessment. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2024; 360:121161. [PMID: 38761626 DOI: 10.1016/j.jenvman.2024.121161] [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: 02/26/2024] [Revised: 04/26/2024] [Accepted: 05/10/2024] [Indexed: 05/20/2024]
Abstract
Recent attention on the detrimental effects of pharmaceutically active compounds (PhACs) in natural water has spurred researchers to develop advanced wastewater treatment methods. Carbamazepine (CBZ), a widely recognized anticonvulsant, has often been a primary focus in numerous studies due to its prevalence and resistance to breaking down. This study aims to explore the effectiveness of a bio-electrochemical system in breaking down CBZ in polluted water and to assess the potential harmful effects of the treated wastewater. The results revealed bio-electro degradation process demonstrated a collaborative effect, achieving the highest CBZ degradation compared to electrodegradation and biodegradation techniques. Notably, a maximum CBZ degradation efficiency of 92.01% was attained using the bio-electrochemical system under specific conditions: Initial CBZ concentration of 60 mg/L, pH level at 7, 0.5% (v/v) inoculum dose, and an applied potential of 10 mV. The degradation pathway established by identifying intermediate products via High-Performance Liquid Chromatography-Mass Spectrometry, revealed the complete breakdown of CBZ without any toxic intermediates or end products. This finding was further validated through in vitro and in vivo toxicity assays, confirming the absence of harmful remnants after the degradation process.
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Affiliation(s)
- Pavithra Muthukumar Sathya
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Harshavardhan Mohan
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Jung-Hee Park
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Kamala-Kannan Seralathan
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea
| | - Min Cho
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea.
| | - Byung-Taek Oh
- Division of Biotechnology, Advanced Institute of Environment and Bioscience, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, 54596, Republic of Korea.
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Jin H, Xu X, Liu R, Wu X, Chen X, Chen D, Zheng X, Zhao M, Yu Y. Electro-oxidation of Ibuprofen using carbon-supported SnO x-CeO x flow-anodes: The key role of high-valent metal. WATER RESEARCH 2024; 252:121229. [PMID: 38324989 DOI: 10.1016/j.watres.2024.121229] [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: 09/16/2023] [Revised: 12/04/2023] [Accepted: 01/28/2024] [Indexed: 02/09/2024]
Abstract
Exploiting electrochemically active materials as flow-anodes can effectively alleviate mass transfer restriction in an electro-oxidation system. However, the electrocatalytic activity and persistence of the conventional flow-anode materials are insufficient, resulting in limited improvement in the electro-oxidation rate and efficiency. Herein, we reported a rational strategy to substantially enhance the electrocatalytic performance of flow-anodes in electro-oxidation by introducing the redox cycle of high-valent metal in a suitable carbon substrate. The characterization suggested that the SnOx-CeOx/carbon black (CB) featured well-distributed morphology, rapid charge transfer, high oxygen evolution potential, and strong water adsorption, and stood out among three kinds of SnOx-CeOx loaded carbon materials. Mechanistic analysis indicated that the redox cycle of Ce species played a key role in accelerating the electron transfer from SnOx to CB directionally and could continuously create the electron-deficient state of the SnOx, thereby sustainably triggering the generation of ·OH. All these features enabled the resulting SnOx-CeOx/CB flow-anode to accomplish a calculated maximum kinetic constant of 0.02461 1/min, a higher current efficiency of 47.1%, and a lower energy consumption of 21.3 kWh/kg COD compared with other conventional flow-anodes reported to date. Additionally, SnOx-CeOx/CB exhibited excellent stability with extremely low leaching concentrations of Sn and Ce ions. This study provides a feasible manner for efficient water decontamination using the electro-oxidation system with SnOx-CeOx/CB.
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Affiliation(s)
- Huachang Jin
- National & Local Joint Engineering Research Center of Ecological Treatment Technology of Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China; Institute for Eco-environmental Research of Sanyang Wetland, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Xiaozhi Xu
- National & Local Joint Engineering Research Center of Ecological Treatment Technology of Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Renlan Liu
- National & Local Joint Engineering Research Center of Ecological Treatment Technology of Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Xiaobo Wu
- Ecological Environment Protection Administrative Law Enforcement Team of Rui'an City, Wenzhou, Zhejiang 325035, China
| | - Xueming Chen
- College of Environmental and Resources Science, Zhejiang University, 866 Yuhangtang Road, Hangzhou 310058, China
| | - Dongzhi Chen
- National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China
| | - Xiangyong Zheng
- National & Local Joint Engineering Research Center of Ecological Treatment Technology of Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China
| | - Min Zhao
- National & Local Joint Engineering Research Center of Ecological Treatment Technology of Urban Water Pollution, College of Life and Environmental Science, Wenzhou University, Wenzhou, Zhejiang 325035, China.
| | - Yang Yu
- National & Local Joint Engineering Research Center of Harbor Oil & Gas Storage and Transportation Technology, Zhejiang Key Laboratory of Petrochemical Environmental Pollution Control, Zhejiang Ocean University, Zhoushan, Zhejiang 316022, China.
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KAWABATA K, NISHI H. Evaluation of Photostability of Medicines and Development of the Photostabilization of the Photosensitive Medicines. CHROMATOGRAPHY 2023. [DOI: 10.15583/jpchrom.2022.021] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/20/2023]
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Kounaris Fuziki ME, Ribas LS, Tusset AM, Brackmann R, Dos Santos OA, Lenzi GG. Pharmaceutical compounds photolysis: pH influence. Heliyon 2023; 9:e13678. [PMID: 36865467 PMCID: PMC9971040 DOI: 10.1016/j.heliyon.2023.e13678] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/08/2022] [Revised: 01/26/2023] [Accepted: 02/07/2023] [Indexed: 02/12/2023] Open
Abstract
The operating parameters of photolytic and photocatalytic reaction processes directly affect the efficiency in the degradation of compounds. In particular, pH is a variable that needs to be considered as it exerts great influence on adsorption, absorption, solubility, among others. This study describes the application of the photolytic process, at different pHs, in the degradation of different pharmaceutical compounds. Photolytic reactions were performed with the following contaminants: acetylsalicylic acid (ASA), ibuprofen (IBP) and paracetamol (PAR). In addition, a comparison was performed using the commercial catalyst P25. The results indicated a great influence of the pH in the kinetic constant of the photodegradation and in the UV absorbance of the species. In particular, the degradation of ASA and PAR were favored with the reduction of pH, while the degradation of IBU and SA were favored by increasing. Also, the chromatograms indicated that pH may affect the by-products formed. In comparison, the photocatalysis process in the presence of P25 proved to be much more effective, but it was not possible to achieve complete mineralization of the compounds.
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Affiliation(s)
| | - Laura S. Ribas
- Department of Chemical Engineering, Federal University of Technology–Paraná, Ponta Grossa, 84017-220, Brazil
| | - Angelo Marcelo Tusset
- Department of Engineering, Federal University of Technology–Paraná, Ponta Grossa, 84017-220, Brazil
| | - Rodrigo Brackmann
- Department of Chemical, Federal University of Technology–Paraná, Pato Branco, 85503-390, Brazil
| | - Onelia A.A. Dos Santos
- Department of Chemical Engineering, State University of Maringá, Maringá, 87020-900, Brazil
| | - Giane Gonçalves Lenzi
- Department of Chemical Engineering, Federal University of Technology–Paraná, Ponta Grossa, 84017-220, Brazil,Corresponding author.
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Jiménez A, Trujillano R, Rives V, Vicente MÁ. Mixed–metal–oxide photocatalysts generated by high–temperature calcination of CaAlFe, hydrocalumite–LDHs prepared from an aluminum salt–cake. Catal Today 2023. [DOI: 10.1016/j.cattod.2023.01.015] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/24/2023]
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Preparation of Ca2Al1–mFem(OH)6Cl·2H2O-Doped Hydrocalumites and Application of Their Derived Mixed Oxides in the Photodegradation of Ibuprofen. CHEMENGINEERING 2022. [DOI: 10.3390/chemengineering6040064] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
Abstract
Aluminum from saline slags generated during the recycling of this metal, extracted under reflux conditions with aqueous NaOH, was used in the synthesis of hydrocalumite-type solids with the formula Ca2Al1–mFem(OH)6Cl·2H2O. The characterization of the obtained solids was carried out by powder X-ray diffraction, infrared spectroscopy, thermal analysis, element chemical analysis, N2 adsorption-desorption at −196 °C and electron microscopy. The results showed the formation of Layered Double Hydroxide-type compounds whose characteristics varied as the amount of incorporated Fe3+ increased. These solids were calcined at 400 °C and evaluated for the catalytic photodegradation of ibuprofen, showing promising results in the elimination of this drug by advanced oxidation processes. The CaAl photocatalyst (without Fe) showed the best performance under UV light for the photodegradation of ibuprofen.
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Bennemla M, Bouafia-Chergui S, Amrane A, Chabani M. The photocatalytic degradation kinetics of the anti-inflammatory drug ibuprofen in aqueous solution under UV/TiO 2 system and neural networks modeling. INTERNATIONAL JOURNAL OF CHEMICAL REACTOR ENGINEERING 2022. [DOI: 10.1515/ijcre-2021-0170] [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
Abstract
In this study, the kinetic degradation of the anti-inflammatory drug Ibuprofen in aqueous solution by heterogeneous TiO2 photocatalytic was investigated. The data obtained were used for training an artificial neural network. Preliminary experiments of photolysis and adsorption were carried out to assess their contribution to the photocatalytic degradation. Both, direct photolysis and adsorption of Ibuprofen are very low-efficient processes (15,83% and 23,88%, respectively). The degradation efficiency was significantly elevated with the addition of TiO2 Catalyst (>94%). The photocatalytic degradation followed a pseudo-first-order reaction according to the L-H model. The hydroxyl radicals and photo-hole (h+) were found to contribute to the Ibuprofen removal. The higher the initial concentration of Ibuprofen resulted in the lower percentage of degradation. This can be credited to the fact that the created photon and radicals were constant. The higher the initial concentration of Ibuprofen the fewer radicals were shared for each Ibuprofen molecular and so the lower percentage of degradation. The maximum photoactivity from the available light is accomplished when the concentration of catalyst reaches to 1 g/L (0.8 g), which was adopted as the optimal amounts. Compared to the removal of ibuprofen, the mineralization was relatively lower. This decrease is due to the organic content of the treated solution, which is mainly composed of recalcitrant intermediate products. The network was planned as a Levenberg-Marquardt algorithm with three layer, four neurons in the input layer, fourteen neurons in the hidden layer and one neuron in the output layer (4:14:1). The artificial neural network was trained until the MSE value between the simulated data and the experimental results was 10−5. The best results (R
2 = 0.999 and MSE = 1.5 × 10−4) were obtained with a log sigmoid transfer function at hidden layer and a linear transfer function at output layer.
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Affiliation(s)
- M. Bennemla
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
| | - S. Bouafia-Chergui
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
| | - A. Amrane
- Ecole Nationale Supérieure de Chimie de Rennes, CNRS , UMR 6226 , 11 allée de Beaulieu , CS 50837 , 35708 , Rennes , France
- Université Européenne de Bretagne , 5 boulevard Laënnec , 35000 , Rennes , France
| | - M. Chabani
- Laboratoire Génie de la réaction, Equipe Procédés durables de dépollution, Faculté de Génie des Procédés et Génie Mécanique , U.S.T.H.B. BP 32 , El Allia , Babezzouar , Algeria
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da Luz VC, Bazoti SF, Behling L, Dalla Rosa C, Pasquali GDL. Enhanced UV Direct Photolysis and UV/H 2O 2 for Oxidation of Triclosan and Ibuprofen in Synthetic Effluent: an Experimental Study. WATER, AIR, AND SOIL POLLUTION 2022; 233:126. [PMID: 35400768 PMCID: PMC8975727 DOI: 10.1007/s11270-022-05583-z] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/29/2021] [Accepted: 03/16/2022] [Indexed: 05/26/2023]
Abstract
UNLABELLED This study aimed to evaluate the implementation of an advanced oxidation system based on UV radiation and UV/H2O2 for degradation of TCS and IBU in synthetic effluent. The assays occurred in a 2-L reactor, protected from external light and equipped with a UV lamp (λ = 254 nm). The effect of contaminant concentration, fractions of chemical species present, and mineralization were evaluated. In the UV/ H2O2 system, different concentrations of H2O2 were studied for oxidation of the contaminants. The kinetic experiments took place between 75 and 270 min of UV irradiation. The results showed > 99% oxidation of TCS in the direct photolysis system at pH 9.4 after 12 min. The degradation of IBU in the UV/H2O2 system, when 10 mg L-1 of H2O2 was used, was 97.39% oxidation. We obtained k' values of 0.189 min-1 for TCS when its highest oxidation occurred and k' values of 0.0219 min-1 for IBU. The system was not able to completely mineralize the contaminants, presenting high values of TOC and COD after treatment, thus suggesting the occurrence of phototransformation. SUPPLEMENTARY INFORMATION The online version contains supplementary material available at 10.1007/s11270-022-05583-z.
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Affiliation(s)
- Vilson Conrado da Luz
- Environmental and Sanitary Engineering Department, Federal University of Fronteira Sul, ERS 135 -Km 72, n° 200, ZIP: 99700-970, PO Box 764, Erechim, RS Brazil
| | - Suzana Fátina Bazoti
- Environmental and Sanitary Engineering Department, Federal University of Fronteira Sul, ERS 135 -Km 72, n° 200, ZIP: 99700-970, PO Box 764, Erechim, RS Brazil
| | - Laura Behling
- Post-Graduation Program in Science and Environmental Technology, Federal University of Fronteira Sul, ERS 135 -Km 72, n° 200, ZIP: 99700-970, PO Box 764, Erechim, RS Brazil
| | - Clarissa Dalla Rosa
- Environmental and Sanitary Engineering Department, Federal University of Fronteira Sul, ERS 135 -Km 72, n° 200, ZIP: 99700-970, PO Box 764, Erechim, RS Brazil
| | - Gean Delise Leal Pasquali
- Post-Graduation Program in Science and Environmental Technology, Federal University of Fronteira Sul, ERS 135 -Km 72, n° 200, ZIP: 99700-970, PO Box 764, Erechim, RS Brazil
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Adala A, Debbache N, Sehili T. Two Coordination Polymers Synthesized from Various N-Donor Clusters Spaced by Terephthalic Acid for Efficient Photocatalytic Degradation of Ibuprofen in Water under Solar and Artificial Irradiation. ACS OMEGA 2022; 7:9276-9290. [PMID: 35350348 PMCID: PMC8945138 DOI: 10.1021/acsomega.1c06049] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/29/2021] [Accepted: 02/01/2022] [Indexed: 06/14/2023]
Abstract
Two coordination polymers CP1 {[Zn(II)(BIPY)(Pht)] n } and CP2 {[Zn(HYD)(Pht)] n } (BIPY = 4,4'-bipyridine, Pht = terephthalic acid, and HYD = 8-hydroxyquinoline) have been successfully synthesized by a hydrothermal process using zinc aqueous solution. The so-prepared compounds were characterized by X-ray diffraction (XRD), Fourier transform infrared (FTIR) spectroscopy, UV-visible spectroscopy, thermogravimetric analysis (TGA), and cyclic voltammetry. XRD pointed to a crystalline phase for CP1, while CP2 required recrystallization, FTIR spectroscopy established the presence of characteristic bands for all the ligands, and TGA showed thermal stability up to 100 °C. The electrochemical study showed a good charge transfer between the ligands and Zn metal for both materials. The UV-vis spectra displayed a strong absorption band spreading over a wide wavelength range, encompassing UV and visible light, with a band gap of 2.69 eV for CP1 and 2.56 eV for CP2, both of which are smaller than that of ZnO. This provides an advantageous alternative to using ZnO. The 5 × 10-5 mol L-1 ibuprofen decomposition kinetics under solar and UV light were studied under different irradiation conditions. Good photocatalytic properties were observed due to their high surface area.
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Affiliation(s)
- Amina Adala
- Department
of Chemistry, Mentouri Brothers University, Constantine 1, Constantine 25017, Algeria
- Laboratory
of Sciences and Technologies of Environment, BP, 325, Ain El
Bey Town, Constantine 25017, Algeria
| | - Nadra Debbache
- Department
of Chemistry, Mentouri Brothers University, Constantine 1, Constantine 25017, Algeria
- Laboratory
of Sciences and Technologies of Environment, BP, 325, Ain El
Bey Town, Constantine 25017, Algeria
| | - Tahar Sehili
- Department
of Chemistry, Mentouri Brothers University, Constantine 1, Constantine 25017, Algeria
- Laboratory
of Sciences and Technologies of Environment, BP, 325, Ain El
Bey Town, Constantine 25017, Algeria
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Olak-Kucharczyk M, Foszpańczyk M, Żyłła R, Ledakowicz S. Photodegradation and ozonation of ibuprofen derivatives in the water environment: Kinetics approach and assessment of mineralization and biodegradability. CHEMOSPHERE 2022; 291:132742. [PMID: 34736944 DOI: 10.1016/j.chemosphere.2021.132742] [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: 08/09/2021] [Revised: 10/12/2021] [Accepted: 10/28/2021] [Indexed: 06/13/2023]
Abstract
This article presents the results of studies on the degradation of ibuprofen transformation products: 1-hydroxyibuprofen (1OHIBF), 4-ethylbenzaldehyde (4EBA), 1-[4-(2-methylpropyl)phenyl]ethan-1-ol (MPPE) in water. To the best of our knowledge, this is the first paper where the ozonation and photodegradation (VIS and UV photolysis, degradation in H2O2/UV system, photosensitized oxidation) of 1OHIBF, 4EBA and MPPE are reported. The processes were performed in demineralized and natural river water. The influence of various reaction parameters on the removal degree was checked. Both, photolysis under VIS light and photosensitized oxidation of target compounds are very low-efficient processes. Ozonation and degradation in H2O2/UV system are effective methods for ibuprofen derivatives degradation. Components present in river water reduced removal degree of investigated compounds during ozonation and degradation in H2O2/UV system. The biodegradability assessment using the Average Oxidation State (AOS) and COD/TOC ratio proved the formation of more oxidized by-products during both processes. The determined second-order rate constants for ozone reaction with 1OHIBF, 4EBA and MPPE are 0.1 ± 0.01, 10.95 ± 1.36 and 3.04 ± 0.33 M-1 s-1, respectively. The calculated reaction rate constants of hydroxyl radicals with MPPE, 4EBA and 1OHIBF are 3.57 × 109, 6.83 × 109 and 1.06 × 109 M-1 s-1, respectively.
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Affiliation(s)
| | - Magdalena Foszpańczyk
- Łukasiewicz Research Network - Textile Research Institute, Brzezińska 5/15, 92-103, Łódź, Poland
| | - Renata Żyłła
- Łukasiewicz Research Network - Textile Research Institute, Brzezińska 5/15, 92-103, Łódź, Poland
| | - Stanisław Ledakowicz
- Faculty of Process and Environmental Engineering, Lodz University of Technology, Wolczanska 213, 90-924, Lodz, Poland
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Sruthi L, Janani B, Sudheer Khan S. Ibuprofen removal from aqueous solution via light-harvesting photocatalysis by nano-heterojunctions: A review. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.119709] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022]
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Lenzi GG, Lopes MF, Andrade DI, Napoli JS, Parolin A, Fávaro YB, Kounaris Fuziki ME, de Almeida LNB, Josué TG, Dias DT, Tusset AM. Functioned catalysts with magnetic core applied in ibuprofen degradation. WATER SCIENCE AND TECHNOLOGY : A JOURNAL OF THE INTERNATIONAL ASSOCIATION ON WATER POLLUTION RESEARCH 2021; 84:2158-2179. [PMID: 34810303 DOI: 10.2166/wst.2021.409] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/13/2023]
Abstract
In the present work, the performance of Ag/ZnO/CoFe2O4 magnetic photocatalysts in the photocatalytic degradation of ibuprofen (IBP) was evaluated. This study considered the use of pure Ag/ZnO (5% Ag) and also the use of the Ag/ZnO/CoFe2O4 magnetic catalysts containing different amounts (5, 10 and 15% wt) of cobalt ferrite (CoFe2O4). The catalysts were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD) and photoacoustic spectroscopy. To carry out the photocatalytic degradation reaction, different concentrations of the ibuprofen contaminant solution (10, 20 and 30 ppm) and different concentrations of photocatalyst were tested (0.3 g L-1, 0.5 g L-1 and 1.0 g L-1). The reaction parameters studied were: IBP concentration, catalyst concentration, adsorption and photolysis, influence of the matrix, radiation source (solar and artificial) and the effect of organic additive. At the end of the photocatalytic tests, the best operating conditions were defined. Considering the obtained results of degradation efficiency and magnetic separation, the optimal parameters selected to proceed with the other tests of the study were: ibuprofen solution concentration 10 ppm, Ag/ZnO/CoFe2O4 (5%) catalyst at a concentration of 0.3 g L-1 and pH 4.5 of the reaction medium. The results indicated the feasibility of magnetic separation of the synthesized catalysts. A long duration test indicated that the catalyst exhibits stability throughout the degradation reaction, as more than 80% of IBP was degraded after 300 minutes. The photocatalytic activity was directly affected by the ferrite load. The higher the nominal load of ferrite, the lower the performance in IBP degradation. It was also observed that the smallest amount of ferrite studied was enough for the catalyst to be recovered and reused. The adsorption and photolysis tests did not show significant results in the IBP degradation. In addition, it was possible to verify that the aqueous matrix, the use of solar radiation and the addition of additive (acid formic) were interfered directly in the process. The catalyst reuse tests indicated that it can be recovered and reused at least three times without considerable catalytic activity loss.
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Affiliation(s)
- Giane Gonçalves Lenzi
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - Mylena Ferreira Lopes
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - Dana Isabelly Andrade
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - José Salvador Napoli
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - Andrieli Parolin
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - Yuri Barros Fávaro
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail:
| | - Maria Eduarda Kounaris Fuziki
- Departamento de Engenharia Química, Universidade Estadual de Maringá, 5790 Colombo Avenue, Maringá, Paraná, 87020-900, Brazil
| | | | - Tatiana Gulminie Josué
- Departamento de Engenharia Química, Universidade Tecnológica Federal Do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil E-mail: ; Departamento de Engenharia Química, Universidade Estadual de Maringá, 5790 Colombo Avenue, Maringá, Paraná, 87020-900, Brazil
| | - Daniele Toniolo Dias
- Departamento Acadêmico de Física, Universidade Tecnológica Federal do Paraná, Rua Doutor Washington Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil
| | - Angelo Marcelo Tusset
- Departamento Acadêmico de Matemática, Universidade Tecnológica Federal do Paraná, Rua Doutor Washington, Subtil Chueire, 330, Ponta Grossa, PR 84017-220, Brazil
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Abreu E, Fidelis M, Fuziki M, Malikoski R, Mastsubara M, Imada R, Diaz de Tuesta J, Gomes H, Anziliero M, Baldykowski B, Dias D, Lenzi G. Degradation of emerging contaminants: Effect of thermal treatment on nb2o5 as photocatalyst. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2021.113484] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Titanium Dioxide-Based Photocatalysts for Degradation of Emerging Contaminants including Pharmaceutical Pollutants. APPLIED SCIENCES-BASEL 2021. [DOI: 10.3390/app11188674] [Citation(s) in RCA: 16] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
Contamination of the environment has been a growing problem in recent years. Due to the rapid growth in human population, the expansion of cities, along with the development of industry, more and more dangerous chemicals end up in the environment, especially in soil and water. For the most part, it is not possible to effectively remove chemicals through traditional remediation techniques, because those used in treatment plants are not specifically designed for this purpose. Therefore, new approaches for water remediation are in great demand. Many efforts have been focused on applications of photocatalysis for the remediation of chemical pollutants including drugs. Titanium(IV) oxide nanoparticles have particularly been considered as potential photocatalysts due to their favorable properties. In this article, we present the problem of emerging contaminants including drugs and discuss the use of photocatalysts based on titanium(IV) oxide nanoparticles for their degradation. A wide selection of materials, starting from bare TiO2, via its hybrid and composite materials, are discussed including those based on carbonaceous materials or connections with macrocyclic structures. Examples of photodegradation experiments on TiO2-based materials including those performed with various active pharmaceutical ingredients are also included.
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15
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Mao Y, Liang J, Ji F, Dong H, Jiang L, Shen Q, Zhang Q. Accelerated degradation of pharmaceuticals by ferrous ion/chlorine process: Roles of Fe(IV) and reactive chlorine species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 787:147584. [PMID: 33991926 DOI: 10.1016/j.scitotenv.2021.147584] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/24/2021] [Revised: 04/16/2021] [Accepted: 05/01/2021] [Indexed: 06/12/2023]
Abstract
In this study, we determined the mechanisms and kinetics of the degradations of ibuprofen (IBP) and sulfamethoxazole (SMX), and identified the active species contributions in ferrous ion (Fe(II))/free chlorine (FC) system. Reactive chlorine species (RCS) were the major contributor to the degradations of IBP (73.0%) and SMX (59.3%), respectively, at pH 3. Due to the low reaction rates between Fe(IV) and target pollutants (kFe(IV), IBP = (1.5 ± 0.03) × 103 M-1 s-1 and kFe(IV), SMX = (4.8 ± 0.2) × 103 M-1 s-1) and the low [Fe(IV)]ss ((5.0 ± 0.6) × 10-8 M), Fe(IV) was not the main contributor and only contributed 0.17% and 0.86% to the degradation of IBP and SMX, respectively, at pH 3. The degradations of pharmaceuticals were facilitated by acidic conditions. Chloride (Cl-) accelerated the degradation of SMX and had a weak effect on the degradation of IBP. Natural organic matter limited the degradation of IBP and SMX. Overall, we demonstrated that multiple active oxidants (Fe(IV) and RCS) are produced by Fe(II)/FC and elucidated the mechanism of active oxidants degradation of pollutants.
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Affiliation(s)
- Yuanxiang Mao
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Jialiang Liang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Fangying Ji
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China.
| | - Huiyu Dong
- Key Laboratory of Drinking Water Science and Technology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, 18 Shuang-qing Road, Beijing 100085, China
| | - Lei Jiang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Qiushi Shen
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
| | - Qian Zhang
- Key Laboratory of Three Gorges Reservoir Region's Eco-Environment, Ministry of Education, Chongqing University, Chongqing 400045, China; College of Environment and Ecology, Chongqing University, Chongqing 400045, China
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He Y, Wang L, Chen Z, Shen B, Wei J, Zeng P, Wen X. Catalytic ozonation for metoprolol and ibuprofen removal over different MnO 2 nanocrystals: Efficiency, transformation and mechanism. THE SCIENCE OF THE TOTAL ENVIRONMENT 2021; 785:147328. [PMID: 33940402 DOI: 10.1016/j.scitotenv.2021.147328] [Citation(s) in RCA: 18] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/25/2021] [Revised: 04/19/2021] [Accepted: 04/21/2021] [Indexed: 06/12/2023]
Abstract
Manganese dioxide has been widely recognized as catalyst in catalytic ozonation for organic pollutants removal from wastewater in recent decades. However, few studies focus on the structure-activity relationship of MnO2 and catalytic ozonation mechanism in water. In the present study, the oxidative reactivity of three different crystal phases of MnO2 corresponding to α-MnO2, β-MnO2 and γ-MnO2 towards metoprolol (MET) and ibuprofen (IBU) were evaluated. α-MnO2 was found to contain the most abundant oxygen vacancy and readily reducible surface adsorbed oxygen (O2-, O-, OH-), which facilitated an increase of ozone utilization and the highest catalytic performance with 99% degradation efficiency for IBU and MET. α-MnO2 was then selected to investigate the optimum key operating parameters with a result of catalyst dosage 0.1 g/L, ozone dosage 1 mg/min and an initial pH 7. The introduction of α-MnO2 promoted reactive oxygen species (O2-, O-, OH-) generation which played significant roles in IBU degradation. Probable degradation pathways of MET and IBU were proposed according to the organic intermediates identified and the reaction sites based on density function theory (DFT) calculations. The present study deepened our understanding on the MnO2 catalyzed ozonation and provided reference to enhance the process efficiency.
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Affiliation(s)
- Yuan He
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Liangjie Wang
- School of Environment, Tsinghua University, Beijing 100084, China; State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Zhan Chen
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Bo Shen
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Jinshan Wei
- School of Environment, Tsinghua University, Beijing 100084, China
| | - Ping Zeng
- State Key Laboratory of Environmental Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing 100012, China
| | - Xianghua Wen
- School of Environment, Tsinghua University, Beijing 100084, China.
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17
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Miranda MO, Cabral Cavalcanti WE, Barbosa FF, Antonio de Sousa J, Ivan da Silva F, Pergher SBC, Braga TP. Photocatalytic degradation of ibuprofen using titanium oxide: insights into the mechanism and preferential attack of radicals. RSC Adv 2021; 11:27720-27733. [PMID: 35480690 PMCID: PMC9037810 DOI: 10.1039/d1ra04340d] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/04/2021] [Accepted: 08/05/2021] [Indexed: 11/21/2022] Open
Abstract
The present work studied ibuprofen degradation using titanium dioxide as a photocatalyst. Mechanistic aspects were presented and the preferred attack sites by the OH˙ radical on the ibuprofen molecule were detailed, based on experimental and simple theoretical-computational results. Although some previous studies show mechanistic proposals, some aspects still need to be investigated, such as the participation of 4-isobutylacetophenone in the ibuprofen degradation and the preferred regions of attack by OH˙ radicals. The photodegradation was satisfactory using 0.03 g of TiO2 and pH = 5.0, reaching 100% decontamination in 5 min. The zeta potential curve showed the regions of attraction and repulsion between TiO2 and ibuprofen, depending on the pH range and charge of the species, influencing the amount of by-products formed. Different by-products have been identified by GC-MS, such as 4-isobutylacetophenone. Ibuprofen conversion to 4-isobutylacetophenone takes place through decarboxylation reaction followed by oxidation. The proposed mechanism indicates that the degradation of ibuprofen undergoes a series of elementary reactions in solution and on the surface. Three different radicals (OH˙, O2−˙ and OOH˙) are produced in the reaction sequence and contribute strongly to the oxidation and mineralization of ibuprofen and by-products, but the hydroxyl radical has a greater oxidation capacity. The simple study using the DFT approach demonstrated that the OH˙ radical attacks preferentially in the region of the ibuprofen molecule with high electronic density, which is located close to the aromatic ring (C
Created by potrace 1.16, written by Peter Selinger 2001-2019
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C bond). The presence of the OH˙ radical was confirmed through a model reaction using salicylic acid as a probe molecule. The degradation of ibuprofen undergoes a series of elementary reactions, generating different radicals which attack preferentially in the region of the ibuprofen with high electron density.![]()
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Affiliation(s)
- Maicon Oliveira Miranda
- Laboratório de Peneiras Moleculares (LABPMOL), Programa de Pós-graduação em Química, Universidade Federal do Rio Grande do Norte (UFRN) Av. Sen. Salgado FIlho, Campus Universitário, Lagoa Nova 59.078-970 Natal RN Brazil +55 84 933422323.,Instituto Federal de Educação, Ciência e Tecnologia do Piauí (IFPI) Rodovia PI 213 Zona Rural 64235-000 Cocal PI Brazil
| | - Wesley Eulálio Cabral Cavalcanti
- Laboratório de Peneiras Moleculares (LABPMOL), Programa de Pós-graduação em Química, Universidade Federal do Rio Grande do Norte (UFRN) Av. Sen. Salgado FIlho, Campus Universitário, Lagoa Nova 59.078-970 Natal RN Brazil +55 84 933422323
| | - Felipe Fernandes Barbosa
- Laboratório de Peneiras Moleculares (LABPMOL), Programa de Pós-graduação em Química, Universidade Federal do Rio Grande do Norte (UFRN) Av. Sen. Salgado FIlho, Campus Universitário, Lagoa Nova 59.078-970 Natal RN Brazil +55 84 933422323
| | - José Antonio de Sousa
- Universidade Federal do Piauí, UFPI, Campus Universitário Ministro Petrônio Portella Ininga 64049-550 Teresina PI Brazil
| | | | - Sibele B C Pergher
- Laboratório de Peneiras Moleculares (LABPMOL), Programa de Pós-graduação em Química, Universidade Federal do Rio Grande do Norte (UFRN) Av. Sen. Salgado FIlho, Campus Universitário, Lagoa Nova 59.078-970 Natal RN Brazil +55 84 933422323
| | - Tiago Pinheiro Braga
- Laboratório de Peneiras Moleculares (LABPMOL), Programa de Pós-graduação em Química, Universidade Federal do Rio Grande do Norte (UFRN) Av. Sen. Salgado FIlho, Campus Universitário, Lagoa Nova 59.078-970 Natal RN Brazil +55 84 933422323
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18
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Nawaz M, Khan AA, Hussain A, Jang J, Jung HY, Lee DS. Reduced graphene oxide-TiO 2/sodium alginate 3-dimensional structure aerogel for enhanced photocatalytic degradation of ibuprofen and sulfamethoxazole. CHEMOSPHERE 2020; 261:127702. [PMID: 32750619 DOI: 10.1016/j.chemosphere.2020.127702] [Citation(s) in RCA: 42] [Impact Index Per Article: 10.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/07/2020] [Revised: 06/19/2020] [Accepted: 07/11/2020] [Indexed: 06/11/2023]
Abstract
In this study, graphene oxide and titanium dioxide in combination with sodium alginate were used to synthesize the reduced graphene oxide-TiO2/sodium alginate (RGOT/SA) aerogel. The potential of RGOT/SA aerogel was evaluated for the photocatalytic degradation of ibuprofen and sulfamethoxazole and was compared with that of bare titanium dioxide nanoparticles. More than 99% removal of both the contaminants was obtained within 45-90 min by using the RGOT/SA aerogel under UV-A light. Mineralization of both the pollutants was also higher in case of RGOT/SA aerogel as compared to bare TiO2 nanoparticles. The optimal mass ratio of TiO2 nanoparticles with respect to graphene oxide was 2:1 in RGOT/SA aerogel in the presence of 1 wt% sodium alginate solution. High photodegradation of Ibuprofen was observed at neutral pH and acidic to neutral pH was found suitable for the photodegradation of sulfamethoxazole. Three-dimensional interconnected macroporous assembly, large surface area for settling TiO2 nanoparticles, efficient charge partitioning, and enhanced physical and chemical adsorption of ibuprofen and sulfamethoxazole on the surface of RGOT/SA aerogel were the significant characteristics of RGOT/SA aerogels. Moreover, ease of separation and recyclability of the RGOT/SA aerogel could further save the extra energy used to separate nanoparticles from the effluent.
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Affiliation(s)
- Mohsin Nawaz
- Department of Agricultural Engineering, Muhammad Nawaz Shareef University of Agriculture, Old Shujabad Road, Multan 60000, Pakistan
| | - Alamgir A Khan
- Department of Agricultural Engineering, Muhammad Nawaz Shareef University of Agriculture, Old Shujabad Road, Multan 60000, Pakistan
| | - Abid Hussain
- Department of Soil and Environmental Sciences, Muhammad Nawaz Shareef University of Agriculture, Old Shujabad Road, Multan 60000, Pakistan
| | - Jiseon Jang
- R&D Institute of Radioactive Wastes, Korea Radioactive Waste Agency, 174 Gajeong-ro, Yuseong-gu, Daejeon 34129, Republic of Korea
| | - Hee-Young Jung
- School of Applied Biosciences, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu, 41566, Republic of Korea
| | - Dae Sung Lee
- Department of Environmental Engineering, Kyungpook National University, 80 Daehak-ro, Buk-gu, Daegu 41566, Republic of Korea.
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19
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Abstract
The natural environment is constantly under threat from man-made pollution. More and more pharmaceuticals are recognized as emerging pollutants due to their growing concentration in the environment. One such chemical is ibuprofen which has been detected in processed sewage. The ineffectiveness of water methods treatment currently used raises the need for new remediation techniques, one of such is photodegradation of pollutants. In the present study, zinc(II) and copper(II) phthalocyanines were grafted onto pure anatase TiO2 nanoparticles (5 and 15 nm) to form photocatalysts for photodecomposition of ibuprofen in water. The nanoparticles were subjected to physicochemical characterization, including: thermogravimetric analysis, X-ray powder diffraction, X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller surface area analysis and particle size measurements. In addition, they were assessed by means of electron spin resonance spectroscopy to evaluate the free radical generation. The materials were also tested for their photocatalytic activity under either UV (365 nm) or visible light (665 nm) irradiation. After 6 h of irradiation, almost complete removal of ibuprofen under UV light was observed, as assessed by liquid chromatography coupled to mass spectrometry. The reaction kinetics calculations revealed that the copper(II) phthalocyanine-containing nanoparticles were acting at a faster rate than those with zinc(II) derivative. The solutions after the photoremediation experiments were subjected to Microtox® acute toxicity analysis.
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20
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Rey-García F, Sieira BJ, Bao-Varela C, Leis JR, Angurel LA, Quintana JB, Rodil R, de la Fuente GF. Can UV-C laser pulsed irradiation be used for the removal of organic micropollutants from water? Case study with ibuprofen. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 742:140507. [PMID: 32629255 DOI: 10.1016/j.scitotenv.2020.140507] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2020] [Revised: 06/15/2020] [Accepted: 06/23/2020] [Indexed: 06/11/2023]
Abstract
A novel approach based on the direct pulsed irradiation of UV-C light onto ibuprofen (IBP) solutions was evaluated in this work, as proof of concept for the direct removal of micropollutants. The experiments confirmed that laser irradiation is able to completely degrade IBP in 15 min in distilled water, with a DOC depletion of ca. 25% and with transformation products (TPs) remaining in solution and estimated to represent ca. 10% of the initial IBP concentration. In wastewater spiked samples, removal efficiency is slightly lower but still significant (ca. 5% IBP remaining after 15 min). Hence, this work suggests that low power solid state pulsed lasers, emitting at 266 nm wavelength, show promise for the removal of these type of micropollutants from water. These results open new opportunities towards the development of chemical-free water treatment methods based on direct, selective irradiation using state of the art, miniaturized laser devices.
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Affiliation(s)
- Francisco Rey-García
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/María de Luna 3, 50018 Zaragoza, Spain; Unidad Asociada de Microóptica & Óptica GRIN, "Photonics4life" group, Universidade de Santiago de Compostela, c/Campus Sur s/n, 15782 Santiago de Compostela, Spain.
| | - Benigno José Sieira
- Department of Analytical Chemistry, Nutrition and Food Sciences, IAQBUS - Institute of Research on Chemical and Biological Analysis, Universidade de Santiago de Compostela, Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Carmen Bao-Varela
- Unidad Asociada de Microóptica & Óptica GRIN, "Photonics4life" group, Universidade de Santiago de Compostela, c/Campus Sur s/n, 15782 Santiago de Compostela, Spain
| | - José Ramón Leis
- Unidad Asociada de Microóptica & Óptica GRIN, "Photonics4life" group, Universidade de Santiago de Compostela, c/Campus Sur s/n, 15782 Santiago de Compostela, Spain.
| | - Luis Alberto Angurel
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/María de Luna 3, 50018 Zaragoza, Spain
| | - José Benito Quintana
- Department of Analytical Chemistry, Nutrition and Food Sciences, IAQBUS - Institute of Research on Chemical and Biological Analysis, Universidade de Santiago de Compostela, Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Rosario Rodil
- Department of Analytical Chemistry, Nutrition and Food Sciences, IAQBUS - Institute of Research on Chemical and Biological Analysis, Universidade de Santiago de Compostela, Constantino Candeira S/N, 15782 Santiago de Compostela, Spain
| | - Germán Francisco de la Fuente
- Instituto de Ciencia de Materiales de Aragón (CSIC-Universidad de Zaragoza), c/María de Luna 3, 50018 Zaragoza, Spain.
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21
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Kása Z, Almási EE, Hernádi K, Gyulavári T, Baia L, Veréb G, László Z, Pap Z. New Insights into The Photoactivity of Shape-Tailored BiVO 4 Semiconductors via Photocatalytic Degradation Reactions and Classical Reduction Processes. Molecules 2020; 25:molecules25204842. [PMID: 33092291 PMCID: PMC7587982 DOI: 10.3390/molecules25204842] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/31/2020] [Revised: 10/08/2020] [Accepted: 10/15/2020] [Indexed: 11/16/2022] Open
Abstract
In the present study, additive-free, pH-driven, hydrothermal crystallization was used to obtain shape-tailored monoclinic BiVO4 photocatalysts. The as-prepared BiVO4 products were systematically characterized, uncovering their crystallographic, morphologic and optical properties, while their applicability was verified in the visible light-driven photodegradation of oxalic acid and rhodamine B. Monoclinic clinobisvanite was obtained in most cases, with their band gap values located between 2.1 and 2.4 eV. The morphology varied from large, aggregated crystals, individual microcrystals to hierarchical microstructures. It was found that the degradation efficiency values obtained in the case of oxalic acid were directly related to the presence of (040) crystallographic plane, while the degradation of rhodamine B was partially independent by the presence of this structural feature. The importance of (040) crystallographic plane was also demonstrated via the reduction of Cu2+ to Cu, by analyzing the Raman spectra of the Cu containing samples, the mean primary crystallite size of Cu and Cu content. Furthermore, the presence of (040) crystallographic plane was directly proportional with the hydrodynamic properties of the powders as well.
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Affiliation(s)
- Zsolt Kása
- Institute of Environmental Science and Technology, University of Szeged, Tisza Lajos blvd. 103, H-6725 Szeged, Hungary; (Z.K.); (E.E.A.)
| | - Enikő Eszter Almási
- Institute of Environmental Science and Technology, University of Szeged, Tisza Lajos blvd. 103, H-6725 Szeged, Hungary; (Z.K.); (E.E.A.)
- Vulcano Research Group, Department of Mineralogy, Geochemistry and Petrology, University of Szeged, Egyetem Street 2, H-6722 Szeged, Hungary
| | - Klára Hernádi
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla sqr. 1, H-6720 Szeged, Hungary; (K.H.); (T.G.)
| | - Tamás Gyulavári
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla sqr. 1, H-6720 Szeged, Hungary; (K.H.); (T.G.)
| | - Lucian Baia
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian str. 42, RO-400271 Cluj-Napoca, Romania
- Faculty of Physics, Babeș-Bolyai University, M. Kogălniceanu str. 1, RO-400084 Cluj-Napoca, Romania
- Correspondence: (L.B.); or (Z.P.)
| | - Gábor Veréb
- Faculty of Engineering, Institute of Process Engineering, University of Szeged, Moszkvai Blvd. 9, H-6725 Szeged, Hungary; (G.V.); (Z.L.)
| | - Zsuzsanna László
- Faculty of Engineering, Institute of Process Engineering, University of Szeged, Moszkvai Blvd. 9, H-6725 Szeged, Hungary; (G.V.); (Z.L.)
| | - Zsolt Pap
- Institute of Environmental Science and Technology, University of Szeged, Tisza Lajos blvd. 103, H-6725 Szeged, Hungary; (Z.K.); (E.E.A.)
- Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla sqr. 1, H-6720 Szeged, Hungary; (K.H.); (T.G.)
- Nanostructured Materials and Bio-Nano-Interfaces Center, Interdisciplinary Research Institute on Bio-Nano-Sciences, Babeș-Bolyai University, Treboniu Laurian str. 42, RO-400271 Cluj-Napoca, Romania
- Correspondence: (L.B.); or (Z.P.)
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Han Z, Gu X, Wang S, Liu L, Wang Y, Zhao Z, Yu Z. Time-resolved in situ monitoring of photocatalytic reactions by probe electrospray ionization mass spectrometry. Analyst 2020; 145:3313-3319. [PMID: 32195503 DOI: 10.1039/d0an00305k] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Probe electrospray ionization mass spectrometry (PESI-MS) has been demonstrated to be a useful in situ and online analytical technique for monitoring of various reactions. In this work, PESI-MS with a surface-modified probe was adopted and applied to in situ monitoring of photocatalytic reactions. Typical reactions of semiconductor photocatalysts, namely TiO2, SnO2, WO3, SiC and ZnS catalyzed methylene blue (MB) and brilliant green (BG) degradation, were selected to demonstrate the potential of PESI-MS to monitor heterogeneous photocatalytic reactions occurring in suspensions. Surface modification of the probe ensures increased wettability during the whole monitoring process. PESI-MS could provide continuous sampling and real-time MS results without time-consuming and cumbersome sample pretreatments. This method has other merits including good reproducibility and stability (time scale > 60 min), convenience of operation, low sample consumption, high time resolution and high tolerance to suspended photocatalyst particles. Time-resolved mass spectra and ion chromatograms of every chemical species e.g. the substrate and reactive intermediates could be obtained, which is helpful for a better understanding of the photocatalytic reaction process. Thus, PESI-MS could be a versatile analytical technique for in situ photocatalytic reaction analysis and could be an alternative means for the evaluation of photocatalyst performance.
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Affiliation(s)
- Zhongbao Han
- School of Chemistry and Chemical Engineering, Shenyang Normal University, Shenyang 110034, Liaoning, China.
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23
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Padilla Villavicencio M, Escobedo Morales A, Ruiz Peralta MDL, Sánchez-Cantú M, Rojas Blanco L, Chigo Anota E, Camacho García JH, Tzompantzi F. Ibuprofen Photodegradation by Ag2O and Ag/Ag2O Composites Under Simulated Visible Light Irradiation. Catal Letters 2020. [DOI: 10.1007/s10562-020-03139-6] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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So HL, Lin KY, Chu W, Gong H. Degradation of Triclosan by Recyclable MnFe2O4-Activated PMS: Process Modification for Reduced Toxicity and Enhanced Performance. Ind Eng Chem Res 2020. [DOI: 10.1021/acs.iecr.9b05481] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Affiliation(s)
- Hiu-Lam So
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Koon-Yee Lin
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wei Chu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Han Gong
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
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25
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Salem S, Sakir M, Sahin K, Korkmaz I, Yavuz E, Sarp G, Onses MS, Yilmaz E. Low bandgap microsphere-like magnetic nanocomposite: An enhanced photocatalyst for degradation of organic contaminants and fabrication of SERS-active surfaces. Colloids Surf A Physicochem Eng Asp 2020. [DOI: 10.1016/j.colsurfa.2020.124436] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/18/2023]
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26
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Oliveira Miranda M, Eulálio Cabral Cavalcanti W, Ivan da Silva F, Rigoti E, Rodríguez-Castellón E, Pergher SBC, Pinheiro Braga T. Photocatalytic degradation of ibuprofen using modified titanium oxide supported on CMK-3: effect of Ti content on the TiO 2 and carbon interaction. Catal Sci Technol 2020. [DOI: 10.1039/d0cy01167c] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
TiO2 nanoparticles dispersed in ordered mesoporous CMK-3 carbon with different Ti contents were successfully synthesized and their activity in the photocatalytic degradation of ibuprofen was presented.
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Affiliation(s)
- Maicon Oliveira Miranda
- Laboratório de Peneiras Moleculares
- Instituto de Química
- Universidade Federal do Rio Grande do Norte
- Natal
- Brazil
| | | | | | - Eduardo Rigoti
- Laboratório de Peneiras Moleculares
- Instituto de Química
- Universidade Federal do Rio Grande do Norte
- Natal
- Brazil
| | - Enrique Rodríguez-Castellón
- Departamento de Química Inorgánica
- Cristalografía y Mineralogía
- Facultad de Ciencias
- Universidad de Málaga
- Málaga
| | - Sibele B. C. Pergher
- Laboratório de Peneiras Moleculares
- Instituto de Química
- Universidade Federal do Rio Grande do Norte
- Natal
- Brazil
| | - Tiago Pinheiro Braga
- Laboratório de Peneiras Moleculares
- Instituto de Química
- Universidade Federal do Rio Grande do Norte
- Natal
- Brazil
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Evidence of non-photo-Fenton degradation of ibuprofen upon UVA irradiation in the presence of Fe(III)/malonate. J Photochem Photobiol A Chem 2019. [DOI: 10.1016/j.jphotochem.2019.111976] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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Villanueva-Rodríguez M, Bello-Mendoza R, Hernández-Ramírez A, Ruiz-Ruiz EJ. Degradation of anti-inflammatory drugs in municipal wastewater by heterogeneous photocatalysis and electro-Fenton process. ENVIRONMENTAL TECHNOLOGY 2019; 40:2436-2445. [PMID: 29457761 DOI: 10.1080/09593330.2018.1442880] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/24/2017] [Accepted: 02/15/2018] [Indexed: 06/08/2023]
Abstract
Non-steroidal anti-inflammatory drugs (NSAID) are compounds frequently found in municipal wastewater and their degradation by conventional wastewater treatment plants (WWTP) is generally incomplete. This study compared the efficiency of two advanced oxidation processes (AOP), namely heterogeneous photocatalysis (HP) and electro-Fenton (EF), in the degradation of a mixture of common NSAID (diclofenac, ibuprofen and naproxen) dissolved in either deionized water or effluent from a WWTP. Both processes were effective in degrading the NSAID mixture and the trend of degradation was as follows, diclofenac > naproxen > ibuprofen. EF with a current density of 40 mA cm-2 and 0.3 mmol Fe2+ L-1 was the most efficient process to mineralize the organic compounds, achieving up to 92% TOC removal in deionized water and 90% in the WWTP effluent after 3 h of reaction. HP with 1.4 g TiO2 L-1 at pH 7 under sunlight, produced 85% TOC removal in deionized water and 39% in WWTP effluent also after 3 h treatment. The lower TOC removal efficiency shown by HP with the WWTP effluent was attributed mainly to the scavenging of reactive species by background organic matter in the wastewater. On the contrary, inorganic ions in the wastewater may produce oxidazing species during the EF process, which contributes to a higher degradation efficiency. EF is a promising option for the treatment of anti-inflammatory pharmaceuticals in municipal WWTP at competitive electrical energy efficiencies.
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Affiliation(s)
- Minerva Villanueva-Rodríguez
- a Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas , San Nicolás de los Garza , Nuevo León, México
- c El Colegio de la Frontera Sur (ECOSUR) , Tapachula , Chiapas, México
| | - Ricardo Bello-Mendoza
- b Department of Civil and Natural Resources Engineering, University of Canterbury , Christchurch , New Zealand
- c El Colegio de la Frontera Sur (ECOSUR) , Tapachula , Chiapas, México
| | - Aracely Hernández-Ramírez
- a Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas , San Nicolás de los Garza , Nuevo León, México
| | - Edgar J Ruiz-Ruiz
- a Universidad Autónoma de Nuevo León (UANL), Facultad de Ciencias Químicas , San Nicolás de los Garza , Nuevo León, México
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29
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Fung CS, Khan M, Kumar A, Lo IM. Visible-light-driven photocatalytic removal of PPCPs using magnetically separable bismuth oxybromo-iodide solid solutions: Mechanisms, pathways, and reusability in real sewage. Sep Purif Technol 2019. [DOI: 10.1016/j.seppur.2019.01.077] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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30
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Wust KM, Beck TS, Hennemann BL, Villetti MA, Frizzo CP. Thermal and oxidative decomposition of ibuprofen-based ionic liquids. J Mol Liq 2019. [DOI: 10.1016/j.molliq.2019.04.038] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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31
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Khan M, Fung CSL, Kumar A, Lo IMC. Magnetically separable BiOBr/Fe 3O 4@SiO 2 for visible-light-driven photocatalytic degradation of ibuprofen: Mechanistic investigation and prototype development. JOURNAL OF HAZARDOUS MATERIALS 2019; 365:733-743. [PMID: 30472459 DOI: 10.1016/j.jhazmat.2018.11.053] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/26/2018] [Revised: 11/13/2018] [Accepted: 11/14/2018] [Indexed: 06/09/2023]
Abstract
The increasingly ubiquitous release of emerging refractory pollutants into water is a serious concern due to associated risks. In this study, mesoporous hierarchical BiOBr/Fe3O4@SiO2-a solvothermally synthesized visible-light-driven magnetic photocatalyst-not only exhibited fast kinetics (t1/2 = 8.7 min) in the photocatalytic degradation of ibuprofen in water but also achieved almost complete mineralization over a prolonged irradiation of 6 h. Various reactive species, including O2¯, OH, and H2O2, were detected, while the scavenging experiments revealed that eCB--mediated reactions and direct-hole oxidation are the major degradation routes. The magnetically recycled BiOBr/Fe3O4@SiO2 maintained ∼80% of its initial photocatalytic activity even after five consecutive cycles. The typically copresent wastewater constituents, including NOM and anions, inhibited the photocatalytic performance to varying extents, and hence necessitated an increase in the photocatalyst dosage to achieve complete ibuprofen degradation in real sewage. Based on the findings of batch experiments, the process was scaled up by developing a 5 L prototype photocatalytic reactor integrated with an electromagnetic separation unit. The results of prototype photocatalytic experiments were comparable to those of batch experiments, and an electromagnetic separation efficiency of ∼99% was achievable in 5 min.
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Affiliation(s)
- Musharib Khan
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Christopher S L Fung
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Ashutosh Kumar
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China; Institute for Advanced Study, The Hong Kong University of Science and Technology, Hong Kong, China.
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32
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Cerrato G, Bianchi CL, Galli F, Pirola C, Morandi S, Capucci V. Micro-TiO 2 coated glass surfaces safely abate drugs in surface water. JOURNAL OF HAZARDOUS MATERIALS 2019; 363:328-334. [PMID: 30321837 DOI: 10.1016/j.jhazmat.2018.09.057] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/10/2018] [Revised: 09/20/2018] [Accepted: 09/21/2018] [Indexed: 06/08/2023]
Abstract
The ingredients of Pharmaceuticals and Personal Care Products (PPCPs) persist in water and conventional treatment plants are not able to remove them efficiently. Sonochemical treatment is insufficient to mineralize organics such as ibuprofen into CO2 and H2O. TiO2 degrades ibuprofen (IBP) under UV light; however, it does not reach a high grade of conversion. Here, we investigated the mineralization of ibuprofen to CO2 by TiO2 UV-C photocatalysis. We replaced nano-sized P25 (the standard catalyst) with a micro-sized commercial sample of TiO2 to preclude the use of nanoparticles which are dangerous for human health and because typical filtration systems are expensive and inefficient. We deposited micro-TiO2 on glass Raschig rings to ensure an easy recovery and reuse of the photocatalyst and we studied its performance both with a batch and a continuous reactor. Micro-TiO2 mineralized 100% of IBP in 24 h. TiO2-coated glass Raschig rings degraded 87% of IBP in 6 h of UV-C irradiation in a continuous reactor, with a mineralization of 25%. Electronspray ionization mass spectrometer (ESI-MS, positive mode) analyses identified 13 different byproducts and we hypothised a degradration pathway for IBP degradation.
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Affiliation(s)
- G Cerrato
- Università degli Studi di Torino, Dip. Chimica & NIS Interdept. Centre, via P. Giuria 7, 10125 Torino, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy.
| | - C L Bianchi
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - F Galli
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - C Pirola
- Università degli Studi di Milano, Dipartimento di Chimica, via Golgi 19, 20133 Milano, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - S Morandi
- Università degli Studi di Torino, Dip. Chimica & NIS Interdept. Centre, via P. Giuria 7, 10125 Torino, Italy; INSTM - Consorzio Interuniversitario per la scienza e tecnologia dei Materiali, via G. Giusti 9, 50121 Firenze, Italy
| | - V Capucci
- GranitiFiandre SpA, 41042 Fiorano M.se, Italy
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Abstract
Bismuth oxyhalides have recently gained attention for their promise as photocatalysts. Due to their layered structure, these materials present fascinating and highly desirable physicochemical properties including visible light photocatalytic capability and improved charge separation. While bismuth oxyhalides have been rigorously evaluated for the photocatalytic degradation of dyes and many synthesis strategies have been employed to enhance this property, relatively little work has been done to test them against pharmaceuticals and pesticides. These persistent organic pollutants are identified as emerging concerns by the EPA and effective strategies must be developed to combat them. Here, we review recent work directed at characterizing the nature of the interactions between bismuth oxyhalides and persistent organic pollutants using techniques including LC-MS/MS for the determination of photocatalytic degradation intermediates and radical scavenging to determine active species during photocatalytic degradation. The reported investigations indicate that the high activity of bismuth oxyhalides for the breakdown of persistent organic pollutants from water can be largely attributed to the strong oxidizing power of electron holes in the valence band. Unlike conventional catalysts like TiO2, these catalysts can also function in ambient solar conditions. This suggests a much wider potential use for these materials as green catalysts for industrial photocatalytic transformation, particularly in flow chemistry applications.
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34
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Romeiro A, Azenha ME, Canle M, Rodrigues VHN, Da Silva JP, Burrows HD. Titanium Dioxide Nanoparticle Photocatalysed Degradation of Ibuprofen and Naproxen in Water: Competing Hydroxyl Radical Attack and Oxidative Decarboxylation by Semiconductor Holes. ChemistrySelect 2018. [DOI: 10.1002/slct.201801953] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Andreia Romeiro
- Centro de Química, Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - M. Emília Azenha
- Centro de Química, Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
| | - Moisés Canle
- Chemical Reactivity & Photoreactivity Group, Faculty of Sciences & CICA; University of A Coruña; E-15071 A Coruña Spain
| | | | - José P. Da Silva
- CCMAR - Centre of Marine Sciences; University of Algarve, Campus de Gambelas; 8005-139 Faro Portugal
| | - Hugh D. Burrows
- Centro de Química, Department of Chemistry; University of Coimbra; 3004-535 Coimbra Portugal
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35
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Arthur RB, Bonin JL, Ardill LP, Rourk EJ, Patterson HH, Stemmler EA. Photocatalytic degradation of ibuprofen over BiOCl nanosheets with identification of intermediates. JOURNAL OF HAZARDOUS MATERIALS 2018; 358:1-9. [PMID: 29945020 DOI: 10.1016/j.jhazmat.2018.06.018] [Citation(s) in RCA: 36] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/19/2017] [Revised: 05/29/2018] [Accepted: 06/07/2018] [Indexed: 06/08/2023]
Abstract
Photocatalysis directed at the removal of persistent organic pollutants, including pharmaceuticals, has been the subject of intense recent research. Bismuth oxychloride (BiOCl) has emerged as a potential alternative to traditional photocatalysts and has shown competitive removal efficiencies. However, pathways responsible for BiOCl photodegradation have not been well characterized. The present work is the first to determine, using LC-MS/MS analysis, the pathways by which BiOCl removes ibuprofen (IBP) from water. HPLC-DAD and LC-MS/MS analyses show that BiOCl converts IBP to two primary photochemical products, 4-isobutylacetophenone (IBAP) and 1-(4-isobutylphenyl)ethanol (IBPE). The reactivity for BiOCl is attributed to interactions of the carboxylic acid group of IBP with holes in the valence band. Hydroxylated-IBP was not detected in BiOCl photocatalytic degradation experiments which would be expected in a process driven by the formation and reactivity of reactive oxygen species. These data were used to formulate a photocatalytic degradation pathway for IBP and highlight the importance of studying both primary and secondary degradation reactions for photocatalytic studies.
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Affiliation(s)
- Robert B Arthur
- Department of Chemistry, University of Maine, Orono, ME, 04469, United States
| | - Jesse L Bonin
- Department of Chemistry, University of Maine, Orono, ME, 04469, United States
| | - Luke P Ardill
- Department of Chemistry, University of Maine, Orono, ME, 04469, United States
| | - Ellery J Rourk
- Department of Chemistry, Bowdoin College, Brunswick, ME, 04011, United States
| | - Howard H Patterson
- Department of Chemistry, University of Maine, Orono, ME, 04469, United States.
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36
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Decomposition of Contaminants of Emerging Concern in Advanced Oxidation Processes. WATER 2018. [DOI: 10.3390/w10070955] [Citation(s) in RCA: 32] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This paper compares the removal degrees of selected contaminants of emerging concern in water solutions during advanced oxidation processes (AOPs), such as H2O2, O3, UV, UV/TiO2, UV/H2O2, and UV/O3. The tested micropollutants belong to the following groups: pharmaceuticals, dyes, UV filters, hormones, pesticides, and food additives. The highest removal rate of pharmaceutical compounds was observed during the UV/TiO2 process. The decomposition of hormones in this process exceeded 96% and the concentration of the UV filter dioxybenzone was reduced by 75%. The pesticide triallat and the food additive butylated hydroxytoluene were most effectively oxidized by the UV process and their removal degrees exceeded 90%. The lowest removal degree in all examined processes was observed in the case of caffeine. Toxicological analysis conducted in post-processed water samples indicated the generation of several oxidation by-products with a high toxic potential. The presence of those compounds was confirmed by the GC-MS analysis. The performance of the UV/O3 process leads to the increase of the toxicity of post-processed water solutions, especially solutions containing degradation by-products of carbamazepine, diclofenac sodium salt, acridine, trialatte, triclosan, and β-estradiol were characterized by high toxicity.
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37
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Highly active non-metals doped mixed-phase TiO 2 for photocatalytic oxidation of ibuprofen under visible light. J Photochem Photobiol A Chem 2017. [DOI: 10.1016/j.jphotochem.2017.07.004] [Citation(s) in RCA: 64] [Impact Index Per Article: 9.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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38
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Visible-light-induced Fe-doped BiVO 4 photocatalyst for contaminated water treatment. MOLECULAR CATALYSIS 2017. [DOI: 10.1016/j.mcat.2017.02.004] [Citation(s) in RCA: 77] [Impact Index Per Article: 11.0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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39
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Baalbaki A, Ayoub GM, Al-Hindi M, Ghauch A. The fate of selected pharmaceuticals in solar stills: Transfer, thermal degradation or photolysis? THE SCIENCE OF THE TOTAL ENVIRONMENT 2017; 574:583-593. [PMID: 27648535 DOI: 10.1016/j.scitotenv.2016.09.082] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/25/2016] [Revised: 09/09/2016] [Accepted: 09/10/2016] [Indexed: 06/06/2023]
Abstract
The increase in demand for, and disposal of, pharmaceuticals, positively correlated with the growing human population, has led to the emergence of contaminants with high environmental and health impacts. Several developing countries that endure problems related to water sufficiency and/or quality resort to the use solar stills as an affordable water treatment method. This research is aimed at investigating the fate of five chemically distinct pharmaceuticals that might pervade solar stills; ibuprofen (IBU), diclofenac (DCF), carbamazepine (CBZ), ampicillin (AMP) and naproxen (NPX). The experiments were conducted under three conditions. The first condition studied the combined effect of temperature and light in simulated field-test-scale solar stills. The effect of temperature as a sole variable was investigated in the second while the third condition studied the effect of light only via concentrated solar power (CSP). Results show that distillates from solar stills did not contain the parent compounds for four out of the five pharmaceuticals. IBU was the only pharmaceutical that showed a transfer via vapor into the distillate with the highest recorded transfer percentage of 2.1% at 50°C when subjected to temperature alone and 0.6% under the combined effect of temperature and light. In the case of NPX and DCF, the parent compounds did not undergo transfer into the distillate phase; however their degradation by-products did. In addition, the results also showed that in the case of NPX, IBU and CBZ both high temperatures and sunlight combined were required to attain noticeable degradation. CSP accelerated the degradation of DCF, NPX and IBU with a three-minutes-degradation percentage of 44%, 13% and 2% respectively.
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Affiliation(s)
- Abbas Baalbaki
- Department of Civil and Environmental Engineering, American University of Beirut, P.O. Box 11-0236 2020, Beirut, Lebanon
| | - George M Ayoub
- Department of Civil and Environmental Engineering, American University of Beirut, P.O. Box 11-0236 2020, Beirut, Lebanon.
| | - Mahmoud Al-Hindi
- Department of Chemical and Petroleum Engineering, American University of Beirut, P.O. Box 11-0236 2020, Beirut, Lebanon
| | - Antoine Ghauch
- Department of Chemistry, American University of Beirut, P.O. Box 11-0236 2020, Beirut, Lebanon
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40
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Gong H, Chu W, Lam SH, Lin AYC. Ibuprofen degradation and toxicity evolution during Fe 2+/Oxone/UV process. CHEMOSPHERE 2017; 167:415-421. [PMID: 27750164 DOI: 10.1016/j.chemosphere.2016.10.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/23/2016] [Revised: 10/01/2016] [Accepted: 10/09/2016] [Indexed: 06/06/2023]
Abstract
This study shows the degradation of ibuprofen in aqueous solution using oxone process mediated by Fe2+ with UV irradiation (FOU). Fe2+/Oxone (FO), Fe2+/UV (FU), Oxone/UV (OU) processes were investigated separately to elucidate the role of different conditions in the processes. The effects of UV wavelength, the dosage of Fe2+, the dosage of oxone, initial target compound concentration, solution pH and anions on the degradation efficiency were studied. In general the FOU is best performed among the processes. About 97% of 0.05 mM ibuprofen was removed in 10 min, under the optimal conditions of FOU (wavelength = 300 nm, [Fe2+]0 = 0.25 mM, [Oxone]0 = 0.25 mM, and pH = 3.68). Subsequent tests like the mineralization efficiency and toxicity evolution were also conducted to ensure the FOU is a safe and comprehensive treatment process after the ibuprofen is removed. However, the above optimal conditions for IBP degradation were found inadequate in the TOC and toxicity tests. After cross examining the test results and intermediates, it was found that the low TOC and toxicity removal was mainly due to the accumulation of toxic intermediates in the solution. It is therefore suggested that a stepwise introduction of Fe2+and oxone (to control the radical concentration at a lower level, so as to minimize the futile consumption of radicals) with an elevated dosage of [IBP]0:[Fe2+]0:[Oxone]0 to 1:25:25 (to effectively degrade the unwanted intermediates at the later stage of reaction) is an efficient approach to ensure the TOC removal and toxicity elimination in FOU.
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Affiliation(s)
- Han Gong
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wei Chu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
| | - So Hiu Lam
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Angela Yu-Chen Lin
- Graduate Institute of Environmental Engineering, National Taiwan University, Taipei, Taiwan
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41
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Quintão FJO, Freitas JRL, de Fátima Machado C, Aquino SF, de Queiroz Silva S, de Cássia Franco Afonso RJ. Characterization of metformin by-products under photolysis, photocatalysis, ozonation and chlorination by high-performance liquid chromatography coupled to high-resolution mass spectrometry. RAPID COMMUNICATIONS IN MASS SPECTROMETRY : RCM 2016; 30:2360-2368. [PMID: 27530893 DOI: 10.1002/rcm.7724] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/29/2016] [Revised: 08/10/2016] [Accepted: 08/14/2016] [Indexed: 06/06/2023]
Abstract
RATIONALE Metformin (MTF) is the most widely prescribed drug for the treatment of patients with type 2 diabetes. Studies involving the removal of MTF from aqueous solutions and detailed information regarding the overall degradation process are scarce. METHODS The degradation of MTF in aqueous solution induced by direct photolysis, photocatalysis, ozonation and chlorination was evaluated. The process was continuously monitored focusing on the identification and monitoring of the by-products formed by applying high-performance liquid chromatography coupled to high-resolution mass spectrometry in positive ion mode. The cytotoxicity of metformin by-products was evaluated with an MTT assay. RESULTS The results from the chlorination and ozonation tests indicate metformin removal efficiencies of 60% after 30 min of exposure. On the other hand, direct photolysis (UV-C) and heterogeneous photocatalysis (TiO2 /UV-C) led to a lower degree of metformin degradation, with removal efficiencies of 9.2% and 31%, respectively, after 30 min of exposure. The mineralization rates varied from 20% for ozonation to 0.72% for photolysis, thereby indicating there was accumulation of degradation by-products in all experiments. Mass spectrometric analysis indicated the presence of five metformin by-products. It was not possible to identify any by-product generated in the photolysis, and, in all oxidative assays, the treated samples were nontoxic to HepG2 cells. CONCLUSIONS It is also observed that all systems exhibited low mineralization rates, with the chlorination process being slightly more efficient in promoting the degradation, whereas the ozonation was more efficient in promoting the mineralization of metformin. Based on these results a route for the chlorination, photodegradation and ozonation of MTF, which comprised of its successive oxidation in the aqueous medium, could be proposed. It could also be concluded that the treated samples were not cytotoxic to HepG2 cells in a MTT assay. Copyright © 2016 John Wiley & Sons, Ltd.
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Affiliation(s)
- Frederico Jehár Oliveira Quintão
- Programa de Pós-Graduação em Engenharia Ambiental (ProAmb), Universidade Federal de Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
| | - Julia Raquel Lino Freitas
- Programa de Pós-Graduação em Engenharia Ambiental (ProAmb), Universidade Federal de Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
| | - Célia de Fátima Machado
- Programa de Pós-Graduação em Engenharia Ambiental (ProAmb), Universidade Federal de Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
| | - Sérgio Francisco Aquino
- Programa de Pós-Graduação em Engenharia Ambiental (ProAmb), Universidade Federal de Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
| | - Silvana de Queiroz Silva
- Programa de Pós-Graduação em Engenharia Ambiental (ProAmb), Universidade Federal de Ouro Preto, Ouro Preto, MG, 35400-000, Brazil
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Vasquez MI, Tarapoulouzi M, Lambrianides N, Hapeshi E, Felekkis K, Saile M, Sticht C, Gretz N, Fatta-Kassinos D. Assessing the potential of pharmaceuticals and their transformation products to cause mutagenic effects: Implications for gene expression profiling. ENVIRONMENTAL TOXICOLOGY AND CHEMISTRY 2016; 35:2753-2764. [PMID: 27043355 DOI: 10.1002/etc.3444] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/13/2015] [Revised: 12/28/2015] [Accepted: 03/30/2016] [Indexed: 06/05/2023]
Abstract
The selection and prioritization of pharmaceuticals and their transformation products for evaluating effects on the environment and human health is a challenging task. One common approach is based on compounds (e.g., mixture composition, concentrations), and another on biology (e.g., relevant endpoint, biological organizational level). Both of these approaches often resemble a Lernaean Hydra-they can create more questions than answers. The present study embraces this complexity, providing an integrated approach toward assessing the potential effects of transformation products of pharmaceuticals by means of mutagenicity, estrogenicity, and differences in the gene expression profiles. Mutagenicity using the tk kinase assay was applied to assess a list of 11 priority pharmaceuticals, namely, atenolol, azithromycin, carbamazepine, diclofenac, ibuprofen, erythromycin, metoprolol, ofloxacin, propranolol, sulfamethoxazole, and trimethoprim. The most mutagenic compounds were found to be β-blockers. In parallel, the photolabile pharmaceuticals were assessed for their mixture effects on mutagenicity (tk assay), estrogenicity (T47D- KBluc assay), and gene expression (microarrays). Interestingly, the mixtures were mutagenic at the µg/L level, indicating a synergistic effect. None of the photolysed mixtures were statistically significantly estrogenic. Gene expression profiling revealed effects related mainly to certain pathways, those of the p53 gene, mitogen-activated protein kinase, alanine, aspartate, and glutamate metabolism, and translation-related (spliceosome). Fourteen phototransformation products are proposed based on the m/z values found through ultra-performance liquid chromatography-tandem mass spectrometry analysis. The transformation routes of the photolysed mixtures indicate a strong similarity with those obtained for each pharmaceutical separately. This finding reinforces the view that transformation products are to be expected in naturally occurring mixtures. Environ Toxicol Chem 2016;35:2753-2764. © 2016 SETAC.
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Affiliation(s)
- Marlen I Vasquez
- Nireas-International Water Research Center, University of Cyprus, Nicosia, Cyprus
| | - Maria Tarapoulouzi
- Nireas-International Water Research Center, University of Cyprus, Nicosia, Cyprus
- Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus
| | - Nancy Lambrianides
- Nireas-International Water Research Center, University of Cyprus, Nicosia, Cyprus
- The Cyprus Institute of Neurology and Genetics, Nicosia, Cyprus
| | - Evroula Hapeshi
- Nireas-International Water Research Center, University of Cyprus, Nicosia, Cyprus
| | - Kyriakos Felekkis
- Department of Life & Health Sciences, University of Nicosia, Nicosia, Cyprus
| | - Maria Saile
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Carsten Sticht
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Norbert Gretz
- Medical Research Center, Medical Faculty Mannheim, University of Heidelberg, Mannheim, Germany
| | - Despo Fatta-Kassinos
- Nireas-International Water Research Center, University of Cyprus, Nicosia, Cyprus.
- Department of Civil and Environmental Engineering, University of Cyprus, Nicosia, Cyprus.
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43
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Candido JP, Andrade SJ, Fonseca AL, Silva FS, Silva MRA, Kondo MM. Ibuprofen removal by heterogeneous photocatalysis and ecotoxicological evaluation of the treated solutions. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2016; 23:19911-19920. [PMID: 27424204 DOI: 10.1007/s11356-016-6947-z] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2016] [Accepted: 05/20/2016] [Indexed: 06/06/2023]
Abstract
Emerging contaminants including pharmaceuticals are a class of compounds that are causing great concern due to several environmental problems. Conventional water and wastewater treatments do not achieve high removal efficiencies for many of these drugs. Therefore, the present work investigated the removal of ibuprofen (IBP) by heterogeneous photocatalysis using TiO2 irradiated with artificial UV light or solar radiation. The treated solutions were tested against Daphnia similis and Raphidocelis subcapitata, which are species commonly used as bioindicators of environmental conditions. The results indicated that IBP removal reached 92 % after 1 h of treatment using artificial UV and 1000 mg L(-1) of TiO2, which was the optimum catalyst concentration in the range studied (20-1000 mg L(-1)). TOC removal reached up to 78 % after 60 min of treatment using TiO2/artificial UV. Ecotoxicological bioassays indicated that the treated solutions had acute effects, with 30 % immobilization of D. similis and 40 % growth inhibition of R. subcapitata.
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Affiliation(s)
- João P Candido
- Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil
| | - Sandro J Andrade
- Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil
| | - Ana L Fonseca
- Instituto de Recursos Naturais, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil
| | - Flávio S Silva
- Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil
| | - Milady R A Silva
- Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil
| | - Márcia M Kondo
- Instituto de Física e Química, Universidade Federal de Itajubá, Av. BPS, 1303, 37500-903, Itajubá, MG, Brazil.
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44
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Xia D, Lo IMC. Synthesis of magnetically separable Bi2O4/Fe3O4 hybrid nanocomposites with enhanced photocatalytic removal of ibuprofen under visible light irradiation. WATER RESEARCH 2016; 100:393-404. [PMID: 27219049 DOI: 10.1016/j.watres.2016.05.026] [Citation(s) in RCA: 44] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/04/2015] [Revised: 04/13/2016] [Accepted: 05/02/2016] [Indexed: 06/05/2023]
Abstract
Ibuprofen (IBU) is one of the representative persistent organic pollutants (POPs) which can cause severe adverse effects in humans and wildlife. Therefore, effectively removing IBU from water is a worldwide necessity. In this study, a novel superparamagnetic Bi2O4/Fe3O4 nanocomposite was successfully prepared by an in-situ growth method and utilized for photocatalytic removal of IBU. The structural characterization of the Bi2O4/Fe3O4 nanocomposite indicates that the monodisperse Fe3O4 nanoparticles of diameter 10 nm are highly assembled on the Bi2O4 nanorods of diameter 120 nm. Under visible light irradiation, using an optimum molar ratio of Bi2O4/Fe3O4 (1:2.5) resulted in a complete photocatalytic degradation of IBU within 2 h, which is a 1.7 times higher efficiency than pure Bi2O4, and a complete mineralization of IBU with a prolonged irradiation time of 4 h. In addition, the potential practicality of Bi2O4/Fe3O4 (1:2.5) was also demonstrated by the efficient photocatalytic degradation of IBU in actual drinking water. The photocatalytic mechanisms of Bi2O4/Fe3O4 (1:2.5) were revealed, indicating that the enhanced photocatalytic performance was mainly attributed to the accelerated separation of electron-hole pairs after surface modification of Fe3O4, and that the photogenerated h(+) was the primary reactive species for the photocatalytic removal of IBU. Furthermore, the Bi2O4/Fe3O4 (1:2.5) can be magnetically recycled and shows good reusability without significant loss of photocatalytic activity or structural change even after reuse over five cycles, showing a promising application for the photocatalytic degradation of POPs from water.
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Affiliation(s)
- Dehua Xia
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China
| | - Irene M C Lo
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Hong Kong, China.
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45
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Gong H, Chu W. Determination and toxicity evaluation of the generated products in sulfamethoxazole degradation by UV/CoFe(2)O(4)/TiO(2). JOURNAL OF HAZARDOUS MATERIALS 2016; 314:197-203. [PMID: 27131460 DOI: 10.1016/j.jhazmat.2016.04.052] [Citation(s) in RCA: 53] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/27/2016] [Revised: 04/19/2016] [Accepted: 04/20/2016] [Indexed: 05/27/2023]
Abstract
The photodegradation of sulfamethoxazole (SMX) under UV radiation with a recyclable catalyst CoFe2O4/TiO2 was examined. The reaction mechanism during the treatment was determined. The toxicity of the degradation intermediates to aquatic organisms, including the green alga Chlorella vulgaris and the brine shrimp Artemia salina was investigated. SMX was completely removed and about 50% TOC was degraded in 5h. Sixteen intermediates were detected, from which four of them were reported for the first time in this study. Four main decay pathways, i.e., hydroxylation, cleavage of SN bond, nitration of amino group, and isomerization were proposed. About 45% of the total mass sulfur source transformed to sulfate ion, and around 25%, 1%, and 0.25% of the total nitrogen transformed to ammonium, nitrogen, and nitrite ions. The toxicity of the treated solution was significantly reduced compared to that of the parent compound SMX. A variation of the algae growth was observed, which was due to the combination of generation of toxic intermediates (i.e., sulfanilamide) and the release of inorganic substances and carbon source as additional nutrients. The adverse effect on the clearance rate of the brine shrimp was also observed, but it can be eliminated if longer degradation time is used.
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Affiliation(s)
- Han Gong
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong
| | - Wei Chu
- Department of Civil and Environmental Engineering, The Hong Kong Polytechnic University, Hung Hom, Kowloon, Hong Kong.
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46
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Determination of ibuprofen enantiomers in human plasma by HPLC–MS/MS: validation and application in neonates. Bioanalysis 2016; 8:1237-50. [PMID: 27225837 DOI: 10.4155/bio-2016-0013] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022] Open
Abstract
Aim: An adaptive method to determine ibuprofen enantiomers with limited volume of plasma required is necessary for investigating PK of ibuprofen in neonates. Results: Enantiomer separation was achieved on a Lux cellulose 3 column with mobile phase consisting of methanol water (85:15, v/v) and formic acid (0.0075%) at isocratic rate of 0.2 ml/min. Calibration curve is linear for each enantiomer at the range of 0.1–60 μg/ml. Validation was conducted and results met requirements regarding to intra- and inter-run precision, accuracy and recovery. No matrix effect or interference was observed from neonatal plasma or comedications. Only 20 μl of plasma was requested in this study. Conclusion: This assay was specific and reliable to quantify ibuprofen enantiomers in neonate plasma.
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47
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Li F, Kang Y, Chen M, Liu G, Lv W, Yao K, Chen P, Huang H. Photocatalytic degradation and removal mechanism of ibuprofen via monoclinic BiVO4 under simulated solar light. CHEMOSPHERE 2016; 150:139-144. [PMID: 26901469 DOI: 10.1016/j.chemosphere.2016.02.045] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/22/2015] [Revised: 02/07/2016] [Accepted: 02/09/2016] [Indexed: 06/05/2023]
Abstract
Characterized as by X-ray diffraction, scanning electron microscopy and UV-vis diffuse reflectance spectra techniques, BiVO4 photocatalyst was hydrothermally synthesized. The photocatalytic degradation mechanisms of ibuprofen (IBP) were evaluated in aqueous media via BiVO4. Results demonstrated that the prepared photocatalyst corresponded to phase-pure monoclinic scheelite BiVO4. The synthesized BiVO4 showed superior photocatalytic properties under the irradiation of visible-light. The photocatalytic degradation rate of IBP decreased with an increase in the initial IBP concentration. The degradation process followed first-order kinetics model. At an IBP concentration of 10 mg L(-1), while a BiVO4 concentration of 5.0 g L(-1) with pH value of 4.5, the rate of IBP degradation was obtained as 90% after 25 min. The photocatalytic degradation of IBP was primarily accomplished via the generation of superoxide radical (O2(•-)) and hydroxyl radicals ((•)OH). During the process of degradation, part of the (•)OH was converted from the O2(•-). The direct oxidation of holes (h(+)) made a minimal contribution to the degradation of IBP.
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Affiliation(s)
- Fuhua Li
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
| | - Yapu Kang
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
| | - Min Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
| | - Guoguang Liu
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China.
| | - Wenying Lv
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
| | - Kun Yao
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
| | - Ping Chen
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
| | - Haoping Huang
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, PR China
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48
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de Escobar CC, Lansarin MA, Zimnoch Dos Santos JH. Synthesis of molecularly imprinted photocatalysts containing low TiO2 loading: Evaluation for the degradation of pharmaceuticals. JOURNAL OF HAZARDOUS MATERIALS 2016; 306:359-366. [PMID: 26800507 DOI: 10.1016/j.jhazmat.2015.11.035] [Citation(s) in RCA: 24] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/27/2015] [Revised: 11/11/2015] [Accepted: 11/18/2015] [Indexed: 06/05/2023]
Abstract
A molecularly imprinted (MI) photocatalyst containing a low TiO2 loading (7.00-16.60mgL(-1) of TiO2) was prepared via an acid-catalyzed sol-gel route using different classes of pharmaceutical compounds (i.e., Atorvastatin, Diclofenac, Ibuprofen, Tioconazole, Valsartan, Ketoconazole and Gentamicine) as the template. Herein, our main goal was to test the hypothesis that photocatalysts based on molecular imprinting may improve the degradation performance of pharmaceutical compounds compared to that of a commercial sample (Degussa P25) due to presence of specific cavities in the silica domain. To elucidate certain trends between the performance of photocatalysts and their structural and textural properties, as well the effect of the structure of the drugs on molecular imprinting, the data were analyzed in terms of pore diameter, pore volume, surface area, zeta potential and six-membered ring percentage of silica. In comparison to the commercial sample (P25), we have shown that adsorption and degradation were enhanced from 48 to 752% and from 5 to 427%, respectively. A comparison with the control system (non-imprinted) indicates that the increased performance of the MI systems was due to the presence of specific cavities on the silica domain, and the textural and structural aspects also support this conclusion. The MI photocatalyst was reusable for seven cycles of reuse in which approximately 60% of its photocatalytic efficiency was preserved for the system containing Diclofenac as the template.
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Affiliation(s)
- Cícero Coelho de Escobar
- Departamento de Engenharia Química-Universidade Federal do Rio Grande do Sul, Rua Eng. Luis Englert s/n, 90040-040 Porto Alegre, RS, Brazil
| | - Marla Azário Lansarin
- Departamento de Engenharia Química-Universidade Federal do Rio Grande do Sul, Rua Eng. Luis Englert s/n, 90040-040 Porto Alegre, RS, Brazil
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49
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Xiang Y, Fang J, Shang C. Kinetics and pathways of ibuprofen degradation by the UV/chlorine advanced oxidation process. WATER RESEARCH 2016; 90:301-308. [PMID: 26748208 DOI: 10.1016/j.watres.2015.11.069] [Citation(s) in RCA: 210] [Impact Index Per Article: 26.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/29/2015] [Revised: 11/27/2015] [Accepted: 11/28/2015] [Indexed: 05/12/2023]
Abstract
The UV/chlorine advanced oxidation process (AOP), which forms reactive species such as hydroxyl radicals (HO) and reactive chlorine species (RCS) such as chlorine atoms (Cl) and Cl2(-), is being considered as an alternative to the UV/H2O2 AOP for the degradation of emerging contaminants. This study investigated the kinetics and pathways of the degradation of a recalcitrant pharmaceutical and personal care product (PPCP)-ibuprofen (IBP)-by the UV/chlorine AOP. The degradation of IBP followed the pseudo first-order kinetics. The first-order rate constant was 3.3 times higher in the UV/chlorine AOP than in the UV/H2O2 AOP for a given chemical molar dosage at pH 6. The first-order rate constant decreased from 3.1 × 10(-3) s(-1) to 5.5 × 10(-4) s(-1) with increasing pH from 6 to 9. Both HO and RCS contributed to the degradation, and the contribution of RCS increased from 22% to 30% with increasing pH from 6 to 9. The degradation was initiated by HO-induced hydroxylation and Cl-induced chlorine substitution, and sustained through decarboxylation, demethylation, chlorination and ring cleavage to form more stable products. Significant amounts of chlorinated intermediates/byproducts were formed from the UV/chlorine AOP, and four chlorinated products were newly identified. The yield of total organic chlorine (TOCl) was 31.6 μM after 90% degradation of 50 μM IBP under the experimental conditions. The known disinfection by-products (DBPs) comprised 17.4% of the TOCl. The effects of water matrix in filtered drinking water on the degradation were not significant, demonstrating the practicality of the UV/chlorine AOP for the control of some refractory PPCPs. However, the toxicity of the chlorinated products should be further assessed.
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Affiliation(s)
- Yingying Xiang
- SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-Sen University), Guangzhou 510275, PR China; Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong
| | - Jingyun Fang
- SYSU-HKUST Research Center for Innovative Environmental Technology (SHRCIET), School of Environmental Science and Engineering, Sun Yat-Sen University, Guangzhou 510275, PR China; Guangdong Provincial Key Laboratory of Environmental Pollution Control and Remediation Technology (Sun Yat-Sen University), Guangzhou 510275, PR China.
| | - Chii Shang
- Department of Civil and Environmental Engineering, The Hong Kong University of Science and Technology, Clear Water Bay, Kowloon, Hong Kong; Hong Kong Branch of Chinese National Engineering Research Center for Control & Treatment of Heavy Metal Pollution, Hong Kong.
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50
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Li FH, Yao K, Lv WY, Liu GG, Chen P, Huang HP, Kang YP. Photodegradation of ibuprofen under UV-Vis irradiation: mechanism and toxicity of photolysis products. BULLETIN OF ENVIRONMENTAL CONTAMINATION AND TOXICOLOGY 2015; 94:479-83. [PMID: 25680932 DOI: 10.1007/s00128-015-1494-8] [Citation(s) in RCA: 27] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/09/2014] [Accepted: 02/03/2015] [Indexed: 05/16/2023]
Abstract
The photodegradation of ibuprofen (IBP) in aqueous media was studied in this paper. The degradation mechanism, the reaction kinetics and toxicity of the photolysis products of IBP under UV-Vis irradiation were investigated by dissolved oxygen experiments, quenching experiments of reactive oxygen species (ROS), and toxicity evaluation utilizing Vibrio fischeri. The results demonstrated that the IBP degradation process could be fitted by the pseudo first-order kinetics model. The degradation of IBP by UV-Vis irradiation included direct photolysis and self-sensitization via ROS. The presence of dissolved oxygen inhibited the photodegradation of IBP, which indicated that direct photolysis was more rapid than the self-sensitization. The contribution rates of ·OH and (1)O2 were 21.8 % and 38.6 % in self-sensitization, respectively. Ibuprofen generated a number of intermediate products that were more toxic than the base compound during photodegradation.
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Affiliation(s)
- Fu Hua Li
- School of Environmental Science and Engineering, Guangdong University of Technology, No. 100 Waihuan Xi Road, Guangzhou Higher Education Mega Center, Panyu District, Guangzhou, 510006, People's Republic of China
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