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Kazi SH, Sheraz MA, Anwar Z, Musharraf SG, Ahmed S, Bano R, Mirza T, Heo K, Na JH. Photolysis of tolfenamic acid in aqueous and organic solvents: a kinetic study. RSC Adv 2024; 14:21383-21397. [PMID: 38979457 PMCID: PMC11228578 DOI: 10.1039/d4ra01369g] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/22/2024] [Accepted: 06/27/2024] [Indexed: 07/10/2024] Open
Abstract
Tolfenamic acid (TA) is a non-steroidal anti-inflammatory drug that was studied for its photodegradation in aqueous (pH 2.0-12.0) and organic solvents (acetonitrile, methanol, ethanol, 1-propanol, 1-butanol). TA follows first-order kinetics for its photodegradation, and the apparent first-order rate constants (k obs) are in the range of 0.65 (pH 12.0) to 6.94 × 10-2 (pH 3.0) min-1 in aqueous solution and 3.28 (1-butanol) to 7.69 × 10-4 (acetonitrile) min-1 in organic solvents. The rate-pH profile for TA photodegradation is an inverted V (∧) or V-top shape, indicating that the cationic form is more susceptible to acid hydrolysis than the anionic form of TA, which is less susceptible to alkaline hydrolysis. The fluorescence behavior of TA also exhibits a V-top-shaped curve, indicating maximum fluorescence intensity at pH 3.0. TA is highly stable at a pH range of 5.0-7.0, making it suitable for formulation development. In organic solvents, the photodegradation rate of TA increases with the solvent's dielectric constant and solvent acceptor number, indicating solute-solvent interactions. The values of k obs decreased with increased viscosity of the solvents due to diffusion-controlled processes. The correlation between k obs versus ionization potential and solvent density has also been established. A total of 17 photoproducts have been identified through LC-MS, of which nine have been reported for the first time. It has been confirmed through electron spin resonance (ESR) spectrometry that the excited singlet state of TA is converted into an excited triplet state through intersystem crossing, which results in an increased rate of photodegradation in acetonitrile.
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Affiliation(s)
- Sadia Hafeez Kazi
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University Karachi-75340 Pakistan
| | - Muhammad Ali Sheraz
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University Karachi-75340 Pakistan
| | - Zubair Anwar
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University Karachi-75340 Pakistan
| | - Syed Ghulam Musharraf
- Third World Center for Science and Technology, H.E.J. Research Institute of Chemistry, University of Karachi Karachi-75270 Pakistan
| | - Sofia Ahmed
- Department of Pharmaceutics, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University Karachi-75340 Pakistan
| | - Raheela Bano
- Dow College of Pharmacy, Dow University of Health Sciences (Ojha Campus) Karachi Pakistan
| | - Tania Mirza
- Department of Pharmaceutical Chemistry, Baqai Institute of Pharmaceutical Sciences, Baqai Medical University Karachi-75340 Pakistan
| | - Kyuyoung Heo
- Reliability Assessment Center, Korea Research Institute of Chemical Technology Daejeon 34114 Republic of Korea
| | - Jun-Hee Na
- Department of Convergence System Engineering, Chungnam National University Daejeon 34134 Republic of Korea
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Kazi SH, Sheraz MA, Musharraf SG, Ahmed S, Bano R, Haq FU, Anwar Z, Ali R. Analysis of Tolfenamic Acid using a Simple, Rapid, and Stability-indicating Validated HPLC Method. Antiinflamm Antiallergy Agents Med Chem 2024; 23:52-70. [PMID: 37291774 DOI: 10.2174/1871523022666230608094152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Revised: 05/13/2023] [Accepted: 05/25/2023] [Indexed: 06/10/2023]
Abstract
BACKGROUND Tolfenamic acid (TA) belongs to the fenamates class of nonsteroidal anti-inflammatory drugs. Insufficient information is available regarding the availability of a reliable and validated stability-indicating method for the assay of TA. OBJECTIVE A relatively simple, rapid, accurate, precise, economical, robust, and stabilityindicating RP-HPLC method has been developed to determine TA in pure and tablet dosage forms. METHODS The method was validated according to the ICH guideline, and parameters like linearity, range, selectivity, accuracy, precision, robustness, specificity, and solution stability were determined. TLC and FTIR spectrometry were used to ascertain the purity of TA. The specificity was determined with known impurities and after performing forced degradation, while the robustness was established by Plackett-Burman's experimental design. The mobile phase used for the analysis was acetonitrile and water (90:10, v/v) at pH 2.5. The detection of the active drug was made at 280 nm using a C18 column (tR = 4.3 min.). The method's applicability was also checked for the yellow polymorphic form of TA. RESULTS The results indicated that the method is highly accurate (99.39-100.80%), precise (<1.5% RSD), robust (<2% RSD), and statistically comparable to the British Pharmacopoeia method with better sensitivity and specificity. CONCLUSION It was observed that the stress degradation studies do not affect the method's accuracy and specificity. Hence the proposed method can be used to assay TA and its tablet dosage form.
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Affiliation(s)
- Sadia Hafeez Kazi
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, 75340, Karachi, Pakistan
| | - Muhammad Ali Sheraz
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, 75340, Karachi, Pakistan
| | - Syed Ghulam Musharraf
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, 75270, Karachi, Pakistan
| | - Sofia Ahmed
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, 75340, Karachi, Pakistan
| | - Raheela Bano
- Dow College of Pharmacy, Dow University of Health Sciences (Ojha Campus), Karachi, Pakistan
| | - Faraz Ul Haq
- H.E.J. Research Institute of Chemistry, International Center for Chemical and Biological Sciences, University of Karachi, 75270, Karachi, Pakistan
| | - Zubair Anwar
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, 75340, Karachi, Pakistan
| | - Raahim Ali
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, 75340, Karachi, Pakistan
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El Mersly L, El Mouchtari EM, Moujahid EM, Briche S, Alaoui Tahiri A, Forano C, Prévot V, Rafqah S. Enhanced photocatalytic activity of hydrozincite-TiO 2 nanocomposite by copper for removal of pharmaceutical pollutant mefenamic acid in aqueous solution. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:24575-24589. [PMID: 36342608 DOI: 10.1007/s11356-022-23832-w] [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: 08/22/2022] [Accepted: 10/21/2022] [Indexed: 06/16/2023]
Abstract
Nanocomposites based on hydrozincite-TiO2 and copper-doped HZ-xCu-TiO2 (x = 0.1; 0.25; 0.35) were synthesized in a single step using the urea method. The samples were characterized by XRD, FTIR, SEM/TEM, and DRS. The study of adsorption capacity and photocatalytic efficiency of these nanocomposites have been tested on a pharmaceutical pollutant, mefenamic acid (MFA). Kinetic study of removal of MFA indicates that this pollutant was adsorbed on the surface of the synthesized phases, according to Langmuir's model. Such adsorption proved to be well adapted in a kinetic pseudo-second-order model with capacity of 13.08 mg/g for HZ-0.25Cu-TiO2. Subsequently, the kinetics of photocatalytic degradation under UV-visible irradiation was studied according to several parameters, which allowed us to optimize our experimental conditions. The nanocomposite HZ-0.25Cu-TiO2 showed significant removal efficiency of MFA. Elimination rate reached 100% after 20 min under UV-vis irradiation, and 77% after 7 h under visible light irradiation. Repeatability tests have shown that this nanocomposite is extremely stable after six photocatalytic cycles. By-products of MFA were detected by LC/MS. These photoproducts was produced by three types of reactions of hydroxylation: cyclization and cleavage of the aromatic ring. MFA underwent complete mineralization after 22 h of irradiation in the presence of the HZ-0.25Cu-TiO2.
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Affiliation(s)
- Lekbira El Mersly
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - El Mountassir El Mouchtari
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - El Mostafa Moujahid
- Laboratoire Physico-Chimie Des Matériaux, Faculté Des Sciences, Université Chouaib Doukkali, EL Jadida, Morocco
| | - Samir Briche
- Département Stockage de L'Energie Et Revêtements Multifonctionnels (SERM), MAScIR Foundation, Rabat, Morocco
| | - Abdelaaziz Alaoui Tahiri
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco
| | - Claude Forano
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, 63000, Clermont-Ferrand, France
| | - Vanessa Prévot
- Université Clermont Auvergne, Clermont Auvergne INP, CNRS, ICCF, 63000, Clermont-Ferrand, France
| | - Salah Rafqah
- Laboratoire de Chimie Analytique et Moléculaire, Faculté Polydisciplinaire de Safi, Université Cadi Ayyad, Sidi Bouzid, B.P. 4162, 46000, Safi, Morocco.
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Environmentally Safe Photodynamic Control of Aedes aegypti Using Sunlight-Activated Synthetic Curcumin: Photodegradation, Aquatic Ecotoxicity, and Field Trial. Molecules 2022; 27:molecules27175699. [PMID: 36080466 PMCID: PMC9457702 DOI: 10.3390/molecules27175699] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/12/2022] [Revised: 08/26/2022] [Accepted: 08/29/2022] [Indexed: 12/03/2022] Open
Abstract
This study reports curcumin as an efficient photolarvicide against Aedes aegypti larvae under natural light illumination. Larval mortality and pupal formation were monitored daily for 21 days under simulated field conditions. In a sucrose-containing formulation, a lethal time 50 (LT50) of 3 days was found using curcumin at 4.6 mg L−1. This formulation promoted no larval toxicity in the absence of illumination, and sucrose alone did not induce larval phototoxicity. The photodegradation byproducts (intermediates) of curcumin were determined and the photodegradation mechanisms proposed. Intermediates with m/z 194, 278, and 370 were found and characterized using LC-MS. The ecotoxicity of the byproducts on non-target organisms (Daphnia, fish, and green algae) indicates that the intermediates do not exhibit any destructive potential for aquatic organisms. The results of photodegradation and ecotoxicity suggest that curcumin is environmentally safe for non-target organisms and, therefore, can be considered for population control of Ae. aegypti.
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The fate of tolfenamic acid in conventional chlorination and UV/chlorination process. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02378-8] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
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Synthesis and Characterization of N and Fe-Doped TiO2 Nanoparticles for 2,4-Dimethylaniline Mineralization. NANOMATERIALS 2022; 12:nano12152538. [PMID: 35893506 PMCID: PMC9331849 DOI: 10.3390/nano12152538] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 07/02/2022] [Revised: 07/20/2022] [Accepted: 07/22/2022] [Indexed: 02/01/2023]
Abstract
The present study aimed to evaluate the feasibility of developing low-cost N- and Fe-doped TiO2 photocatalysts for investigating the mineralization of 2,4-dimethylaniline (2,4-DMA). With a single anatase phase, the photocatalysts showed high thermal stability with mass losses of less than 2%. The predominant oxidative state is Ti4+, but there is presence of Ti3+ associated with oxygen vacancies. In materials with N, doping was interstitial in the NH3/NH4+ form and for doping with Fe, there was a presence of Fe-Ti bonds (indicating substitutional occupations). With an improved band gap energy from 3.16 eV to 2.82 eV the photoactivity of the photocatalysts was validated with an 18 W UVA lamp (340–415 nm) with a flux of 8.23 × 10−6 Einstein s−1. With a size of only 14.45 nm and a surface area of 84.73 m2 g−1, the photocatalyst doped with 0.0125% Fe mineralized 92% of the 2,4-DMA in just 180 min. While the 3% N photocatalyst with 12.27 nm had similar performance at only 360 min. Factors such as high surface area, mesoporous structure and improved Ebg, and absence of Fe peak in XPS analysis indicate that doping with 0.0125% Fe caused a modification in TiO2 structure.
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Paula Floriano Santos A, Gozzi F, Evaristo de Carvalho A, Roberta Ferreira de Oliveira K, Rodrigues Lima Caires A, Pereira Cavalcante R, Fabbro Cunha R, Antônio da Silva D, Roberto Vieira Guelfi D, de Melo da Silva L, Ferreira da Silva T, Antonio Casagrande G, César de Oliveira S, Machulek Junior A. Leachate degradation using solar photo-fenton like process: Influence of coagulation-flocculation as a pre-treatment step. Sep Purif Technol 2022. [DOI: 10.1016/j.seppur.2022.120712] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Hussain S, Khan H, Gul S, Steter JR, Motheo AJ. Modeling of photolytic degradation of sulfamethoxazole using boosted regression tree (BRT), artificial neural network (ANN) and response surface methodology (RSM); energy consumption and intermediates study. CHEMOSPHERE 2021; 276:130151. [PMID: 34088079 DOI: 10.1016/j.chemosphere.2021.130151] [Citation(s) in RCA: 17] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/19/2021] [Revised: 02/16/2021] [Accepted: 02/26/2021] [Indexed: 06/12/2023]
Abstract
This study explores the boosted regression trees (BRT), artificial neural network (ANN) and response surface methodology (RSM) to model and optimize the operational variables for the simulation of the Photolytic degradation of Sulfamethoxazole (SMX) and concurrent total organic carbon (TOC) removal, based on the experimental data set. Four candidate variables involving initial pH (2-11), initial SMX concentration (50-200 mg L-1), temperature (15-45 °C) and time (6-120 min) were considered for simultaneous optimization of SMX and TOC degradation. The result revealed that all the three models are statistically considerable as the values of R, R2, adj-R2 are >0.85, thus be deemed to work well in data fitting, prediction, and optimization, nevertheless, the values of R, R2, adj-R2, RMSE, MAE and AAD are far better for ANN and BRT than RSM method. The ∼100% SMX degradation conditions were found to be as follows: treatment time: 25 min, pH: 2.0, temperature: 35 °C and SMX concentration: 50 mg L-1, while the maximum possible removal of TOC under the given conditions was ∼25%. The percentage contribution (PC) of each variable was deduced by ANOVA analysis of proposed quadratic models which indicated that time and pH are important factors than temperature and SMX concentration. The photolytic intermediates and inorganic ions of SMX, were identified and a potential route of transformation was also proposed.
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Affiliation(s)
- Sajjad Hussain
- Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, 23640, KPK, Pakistan; São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São Carlense 400, 13566-590, São Carlos, SP, Brazil.
| | - Hammad Khan
- Faculty of Materials and Chemical Engineering, GIK Institute of Engineering Sciences and Technology, Topi, 23640, KPK, Pakistan
| | - Saima Gul
- Department of Chemistry, Islamia College University Peshawar, KP, Pakistan
| | - Juliana R Steter
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São Carlense 400, 13566-590, São Carlos, SP, Brazil
| | - Artur J Motheo
- São Carlos Institute of Chemistry, University of São Paulo, Avenida Trabalhador São Carlense 400, 13566-590, São Carlos, SP, Brazil
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Akula LK, Gaddam VB, Damaraju M, Bhattacharyya D, Kurilla KK. Domestic wastewater treatment in a coupled sequential batch reactor-electrochemical reactor process. WATER ENVIRONMENT RESEARCH : A RESEARCH PUBLICATION OF THE WATER ENVIRONMENT FEDERATION 2021; 93:953-967. [PMID: 33260260 DOI: 10.1002/wer.1488] [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: 08/12/2020] [Revised: 10/28/2020] [Accepted: 11/18/2020] [Indexed: 06/12/2023]
Abstract
The effectiveness of a sequenced biological-physicochemical reactor system for treating sewage was studied. The biological degradation was conducted in a Sequential Batch Reactor, which had innovative features for simplifying the operation and maintenance of the reactor. The reactor was operated at 4, 6, 8, and 12 hr cycle. Up to 82% removal of Chemical Oxygen Demand (COD), 50% removal of Dissolved Organic Carbon (DOC), 45% removal of Total Nitrogen (TN), and 45% removal of Total Phosphorus (TP) were achieved. The treated effluent was further polished in a continuous-flow bipolar-mode electrochemical reactor to remove additional recalcitrant organic matter from the wastewater. The process parameters were optimized using Response Surface Methodology. At the optimum condition (pH = 8.7; Current = 1.0; reaction time = 9.0), up to 90% removal of COD, 67% removal of DOC, 61% removal of TN, and 99.9% removal of TP were achieved in the coupled system. Micropollutants belonging to Pharmaceutically Active Compounds, pesticides, etc., were significantly removed. The coupled system completely removed Salmonella, Pseudomonas, and Staphylococcus. However, coliforms were detected at the outlet samples. A UV or ozone disinfection treatment is recommended for the safe reuse of the treated water for nonpotable purposes. PRACTIONER POINTS: Sequential sequential batch reactor-electrochemical reactor process (SBR-ECR) technology is effective for micropollutant removal from sewage. The coupled SBR-ECR system requires less footprint compared to conventional biological systems for wastewater treatment. Carbon material balance study revealed that more than 60% of carbon escapes from wastewater in the form of CO2.
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Affiliation(s)
- Lokesh Kumar Akula
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, India
| | | | - Madhuri Damaraju
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, India
| | - Debraj Bhattacharyya
- Department of Civil Engineering, Indian Institute of Technology Hyderabad, Kandi, India
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Antonio da Silva D, Pereira Cavalcante R, Batista Barbosa E, Machulek Junior A, César de Oliveira S, Falcao Dantas R. Combined AOP/GAC/AOP systems for secondary effluent polishing: Optimization, toxicity and disinfection. Sep Purif Technol 2021. [DOI: 10.1016/j.seppur.2021.118415] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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Photodegradation mechanism and influencing factors of asthma drug salmeterol under UV irradiation. J Photochem Photobiol A Chem 2021. [DOI: 10.1016/j.jphotochem.2020.112944] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/14/2022]
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An J, Li Y, Chen W, Li G, He J, Feng H. Electrochemically-deposited PANI on iron mesh-based metal-organic framework with enhanced visible-light response towards elimination of thiamphenicol and E. coli. ENVIRONMENTAL RESEARCH 2020; 191:110067. [PMID: 32818501 DOI: 10.1016/j.envres.2020.110067] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/05/2020] [Revised: 07/19/2020] [Accepted: 08/07/2020] [Indexed: 06/11/2023]
Abstract
Metal-organic frameworks (MOFs) are emerging class of porous materials that attracted tremendous attention as eco-friendly photocatalysts. However, poor charge separation in most MOFs largely thwarts their photocatalytic performance. In this work, Materials of Institut Lavoisier-100(Fe) (MIL-100 (Fe)) based on iron mesh was successfully fabricated by in situ growth. MIL-100(Fe) doped with polyaniline, namely MIL-100(Fe)/PANI, were then fabricated by galvanostatic deposition followed by annealing. Compared to pure MIL-100(Fe), MIL-100(Fe)/PANI composites exhibited excellent photocatalytic performances towards Thiamphenicol (TAP) degradation and Escherichia coli (E. Coli.) inactivation. The apparent rate constant, k, for TAP elimination of the MIL-100(Fe)/PANI composites with H2O2 is approximately 3 times as high as that of pure MIL-100(Fe). The electrochemical studies showed enhanced photocatalytic performances, which can be attributed to the electronic conductivity of PANI polymers. Quenching experiments, fluorescent tests and electron paramagnetic resonance (EPR) all suggested ⋅O2-, e-, ⋅OH and h+ as reactive oxidizing species (ROSs) involved in the photocatalytic process, where ⋅OH played the predominant ROSs. The transformation products of TAP were also isolated and characterized by high-resolution mass spectrometry, and transformation pathways of TAP under Vis/MIL-100(Fe)/PANI/H2O2 were tentatively clarified based on involved intermediates. Herein, MOFs conjugated conductive polymers nanocomposites look promising as efficient photocatalysts for organic pollutants degradation and bacteria inactivation. This work could offer novel strategies for the development of heterojunction composites with enhanced photocatalytic performances for better environmental remediation.
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Affiliation(s)
- Jibin An
- Key Laboratory of Environmental Materials & Remediation Technologies of Chongqing, College of Chemistry & Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, PR China.
| | - Yanlin Li
- Key Laboratory of Environmental Materials & Remediation Technologies of Chongqing, College of Chemistry & Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, PR China
| | - Wei Chen
- Key Laboratory of Environmental Materials & Remediation Technologies of Chongqing, College of Chemistry & Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, PR China
| | - Guoqiang Li
- Chongqing University, Chongqing, 400044, PR China
| | - Jiahong He
- Key Laboratory of Environmental Materials & Remediation Technologies of Chongqing, College of Chemistry & Environmental Engineering, Chongqing University of Arts and Sciences, Chongqing, 402160, PR China
| | - Huixia Feng
- Lanzhou University of Technology, Lanzhou, 730050, PR China
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Gardner CL, da Silva DR, Pagliai FA, Pan L, Padgett-Pagliai KA, Blaustein RA, Merli ML, Zhang D, Pereira C, Teplitski M, Chaparro JX, Folimonova SY, Conesa A, Gezan S, Lorca GL, Gonzalez CF. Assessment of unconventional antimicrobial compounds for the control of 'Candidatus Liberibacter asiaticus', the causative agent of citrus greening disease. Sci Rep 2020; 10:5395. [PMID: 32214166 PMCID: PMC7096471 DOI: 10.1038/s41598-020-62246-x] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2019] [Accepted: 03/11/2020] [Indexed: 01/22/2023] Open
Abstract
In this study, newly identified small molecules were examined for efficacy against ‘Candidatus Liberibacter asiaticus’ in commercial groves of sweet orange (Citrus sinensis) and white grapefruit (Citrus paradisi) trees. We used benzbromarone and/or tolfenamic acid delivered by trunk injection. We evaluated safety and efficacy parameters by performing RNAseq of the citrus host responses, 16S rRNA gene sequencing to characterize citrus-associated microbial communities during treatment, and qRT-PCR as an indirect determination of ‘Ca. L. asiaticus’ viability. Analyses of the C. sinensis transcriptome indicated that each treatment consistently induced genes associated with normal metabolism and growth, without compromising tree viability or negatively affecting the indigenous citrus-associated microbiota. It was found that treatment-associated reduction in ‘Ca. L. asiaticus’ was positively correlated with the proliferation of several core taxa related with citrus health. No symptoms of phytotoxicity were observed in any of the treated trees. Trials were also performed in commercial groves to examine the effect of each treatment on fruit productivity, juice quality and efficacy against ‘Ca. L. asiaticus’. Increased fruit production (15%) was observed in C. paradisi following twelve months of treatment with benzbromarone and tolfenamic acid. These results were positively correlated with decreased ‘Ca. L. asiaticus’ transcriptional activity in root samples.
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Affiliation(s)
- Christopher L Gardner
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Danilo R da Silva
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Fernando A Pagliai
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Lei Pan
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Kaylie A Padgett-Pagliai
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Ryan A Blaustein
- Soil and Water Sciences Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Marcelo L Merli
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Dan Zhang
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Cécile Pereira
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Max Teplitski
- Soil and Water Sciences Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Jose X Chaparro
- Fruit Tree Breeding and Genetics, Horticultural Sciences Department, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Svetlana Y Folimonova
- Plant Pathology Department, Institute of Food and Agricultural Science, University of Florida, Gainesville, FL, 32611, USA
| | - Ana Conesa
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Salvador Gezan
- School of Forest Resources and Conservation, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Graciela L Lorca
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America
| | - Claudio F Gonzalez
- Microbiology and Cell Science Department, Genetics Institute, Institute of Food and Agricultural Science, University of Florida, Gainesville, Florida, United States of America.
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de Oliveira M, Frihling BEF, Velasques J, Filho FJCM, Cavalheri PS, Migliolo L. Pharmaceuticals residues and xenobiotics contaminants: Occurrence, analytical techniques and sustainable alternatives for wastewater treatment. THE SCIENCE OF THE TOTAL ENVIRONMENT 2020; 705:135568. [PMID: 31846817 DOI: 10.1016/j.scitotenv.2019.135568] [Citation(s) in RCA: 59] [Impact Index Per Article: 14.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/08/2019] [Revised: 11/14/2019] [Accepted: 11/15/2019] [Indexed: 04/13/2023]
Abstract
Emerging contaminants are increasingly present in the environment, and their appearance on both the environment and health of living beings are still poorly understood by society. Conventional sewage treatment facilities that are under validity and were designed years ago are not developed to remove pharmaceutical compounds, their main focus is organic and bacteriological removal. Pharmaceutical residues are associated directly with quantitative production aspects as well as inadequate waste management policies. Persistent classes of emerging compounds such as xenobiotics present molecules whose physicochemical properties such as small molecular size, ionizability, water solubility, lipophilicity, polarity and volatility make degradability, identification and quantification of these complex compounds difficult. Based on research results showing that there is a possibility of risk to human and environmental health the presence of these compounds in the environment this article aimed to review the main pharmaceutical and xenobiotic residues present in the environment, as well as to present the most common methodologies used. The most commonly used analytical methods for identifying these compounds were HPLC and Gas Chromatography coupled with mass spectrometry with potential for characterize complex substances in the environment with low concentrations. An alternative and low-cost technology for emerging compound treatment demonstrated in the literature with a satisfactory performance for several types of sewage such as domestic sewage, wastewater and agroindustrial, was the Wetlands Constructed. The study was able to identify the main compounds that are being found in the environment and identify the most used analytical methods to identify and quantify these compounds, bringing some alternatives combining technologies for the treatment of compounds. Environmental contamination is eminent, since the production of emerging compounds aims to increase along with technological development. This demonstrates the need to explore and aggregate sewage treatment technologies to reduce or prevent the deposition of these compounds into the environment.
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Affiliation(s)
- Milina de Oliveira
- Departamento de Engenharia Sanitária e Ambiental, Universidade Católica Dom Bosco, Campo Grande, Brazil
| | | | - Jannaina Velasques
- Centro de Formação em Ciências Agroflorestais, Universidade Federal do Sul da Bahia, Itabuna, Brazil
| | - Fernando Jorge Corrêa Magalhães Filho
- Departamento de Engenharia Sanitária e Ambiental, Universidade Católica Dom Bosco, Campo Grande, Brazil; Programa de Pós-graduação em Ciências Ambientais e Sustentabilidade Agropecuária, Universidade Católica Dom Bosco, Campo Grande, Brazil
| | | | - Ludovico Migliolo
- Programa de Pós-graduação em Biotecnologia, Universidade Católica Dom Bosco, Campo Grande, Brazil; Programa de Pós-graduação em Biologia Celular e Molecular, Universidade Federal da Paraíba, João Pessoa, Brazil; Programa de Pós-graduação em Bioquímica, Universidade Federal do Rio Grande do Norte, Natal, Brazil.
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da Silva LM, Gozzi F, Cavalcante RP, de Oliveira SC, Brillas E, Sirés I, Machulek A. Assessment of 4-Aminoantipyrine Degradation and Mineralization by Photoelectro-Fenton with a Boron-Doped Diamond Anode: Optimization, Treatment in Municipal Secondary Effluent, and Toxicity. ChemElectroChem 2019. [DOI: 10.1002/celc.201801651] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Lucas M. da Silva
- Institute of Chemistry; Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555, CP 549 Campo Grande, MS 79074-460 Brazil
| | - Fábio Gozzi
- Institute of Chemistry; Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555, CP 549 Campo Grande, MS 79074-460 Brazil
| | - Rodrigo P. Cavalcante
- Institute of Chemistry; Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555, CP 549 Campo Grande, MS 79074-460 Brazil
| | - Silvio C. de Oliveira
- Institute of Chemistry; Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555, CP 549 Campo Grande, MS 79074-460 Brazil
| | - Enric Brillas
- Departament de Química Física Facultat de Química; Universitat de Barcelona Martí i Franquès 1-11; 08028 Barcelona Spain
| | - Ignasi Sirés
- Departament de Química Física Facultat de Química; Universitat de Barcelona Martí i Franquès 1-11; 08028 Barcelona Spain
| | - Amilcar Machulek
- Institute of Chemistry; Federal University of Mato Grosso do Sul; Av. Senador Filinto Muller, 1555, CP 549 Campo Grande, MS 79074-460 Brazil
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de Oliveira DM, Cavalcante RP, da Silva LDM, Sans C, Esplugas S, de Oliveira SC, Junior AM. Identification of intermediates, acute toxicity removal, and kinetics investigation to the Ametryn treatment by direct photolysis (UV 254), UV 254/H 2O 2, Fenton, and photo-Fenton processes. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:4348-4366. [PMID: 29427279 DOI: 10.1007/s11356-018-1342-6] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/20/2017] [Accepted: 01/19/2018] [Indexed: 06/08/2023]
Abstract
This paper reports the degradation of 10 mg L-1 Ametryn solution with different advanced oxidation processes and by ultraviolet (UV254) irradiation alone with the main objective of reducing acute toxicity and increase biodegradability. The investigated factors included Fe2+ and H2O2 concentrations. The effectiveness of the UV254 and UV254/H2O2 processes were investigated using a low-pressure mercury UV lamp (254 nm). Photo-Fenton process was explored using a blacklight blue lamp (BLB, λ = 365 nm). The UV254 irradiation process achieved complete degradation of Ametryn solution after 60 min. The degradation time of Ametryn was greatly improved by the addition of H2O2. It is worth pointing out that a high rate of Ametryn removal was attained even at low concentrations of H2O2. The kinetic constant of the reaction between Ametryn and HO● for UV254/H2O2 was 3.53 × 108 L mol-1 s-1. The complete Ametryn degradation by the Fenton and photo-Fenton processes was observed following 10 min of reaction for various combinations of Fe2+ and H2O2 under investigation. Working with the highest concentration (150 mg L-1 H2O2 and 10 mg L-1 Fe2+), around 30 and 70% of TOC removal were reached within 120 min of treatment by Fenton and photo-Fenton processes, respectively. Although it did not obtain complete mineralization, the intermediates formed in the degradation processes were hydroxylated and did not promote acute toxicity of Vibrio fischeri. Furthermore, a substantial improvement of biodegradability was obtained for all studied processes.
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Affiliation(s)
- Dirce Martins de Oliveira
- Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Cidade Universitária, CP 549, Campo Grande, MS, 79070-900, Brazil
| | - Rodrigo Pereira Cavalcante
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS, 79074-460, Brazil
| | - Lucas de Melo da Silva
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS, 79074-460, Brazil
| | - Carme Sans
- Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès, 1, 08028, Barcelona, Spain
| | - Santiago Esplugas
- Department of Chemical Engineering, University of Barcelona, C/Martí i Franquès, 1, 08028, Barcelona, Spain
| | - Silvio Cesar de Oliveira
- Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Cidade Universitária, CP 549, Campo Grande, MS, 79070-900, Brazil
| | - Amilcar Machulek Junior
- Faculty of Engineering, Architecture and Urbanism and Geography, Federal University of Mato Grosso do Sul, Cidade Universitária, CP 549, Campo Grande, MS, 79070-900, Brazil.
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS, 79074-460, Brazil.
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Fauzi AA, Jalil AA, Mohamed M, Triwahyono S, Jusoh NWC, Rahman AFA, Aziz FFA, Hassan NS, Khusnun NF, Tanaka H. Altering fiber density of cockscomb-like fibrous silica-titania catalysts for enhanced photodegradation of ibuprofen. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2018; 227:34-43. [PMID: 30172157 DOI: 10.1016/j.jenvman.2018.08.073] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/17/2018] [Revised: 08/05/2018] [Accepted: 08/16/2018] [Indexed: 06/08/2023]
Abstract
Fibrous silica-titania (FST) catalysts were synthesized by microemulsion followed by silica seed-crystal crystallization methods under various molar ratios of toluene to water (T/W). The catalysts were characterized by XRD, UV-DRS, FESEM, TEM, AFM, N2 adsorption-desorption, FTIR, and ESR. The results revealed that altering the T/W ratio affected the growth of the silica and titania and led to different size, fiber density, silica-titania structure, and number of hydroxyl groups, as well as oxygen vacancies in the FSTs, which altered their behavior toward subsequent application. Photodegradation of ibuprofen (IBP) are in the following order: FST(6:1) (90%) > FST(5:1) (84%) > FST(7:1) (79%) > commercial TiO2 (67%). A kinetics study using Langmuir-Hinshelwood model illustrated that the photodegradation followed the pseudo-first-order and adsorption was the rate-limiting step. Optimization by response surface methodology (RSM) showed that the pH, initial concentration, and catalyst dosage were the remarkable parameters in photodegradation of IBP. The FST (6:1) maintained its photocatalytic activities for up to five cycles reaction without serious catalyst deactivation, and was also able to degrade other endocrine-disrupting chemicals, indicating its potential use for the treatment of those chemicals in wastewater.
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Affiliation(s)
- A A Fauzi
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - A A Jalil
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia; Centre of Hydrogen Energy, Institute of Future Energy, 81310, UTM Johor Bahru, Johor, Malaysia.
| | - M Mohamed
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - S Triwahyono
- Department of Chemistry, Faculty of Science, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - N W C Jusoh
- Department of Chemical Process Engineering, Malaysia-Japan International Institute of Technology (MJIIT) Universiti Teknologi Malaysia, 54100, Kuala Lumpur, Malaysia
| | - A F A Rahman
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - F F A Aziz
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - N S Hassan
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - N F Khusnun
- Department of Chemical Engineering, Faculty of Chemical and Energy Engineering, Universiti Teknologi Malaysia, 81310, UTM Johor Bahru, Johor, Malaysia
| | - H Tanaka
- Department of Chemical Engineering, Faculty of Engineering, Tokyo University of Agriculture and Technology, 183-0054, Fuchu, Tokyo, Japan
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Antonio da Silva D, Cavalcante RP, Cunha RF, Machulek A, César de Oliveira S. Optimization of nimesulide oxidation via a UV-ABC/H 2O 2 treatment process: Degradation products, ecotoxicological effects, and their dependence on the water matrix. CHEMOSPHERE 2018; 207:457-468. [PMID: 29807345 DOI: 10.1016/j.chemosphere.2018.05.115] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/20/2018] [Revised: 05/14/2018] [Accepted: 05/20/2018] [Indexed: 06/08/2023]
Abstract
Nimesulide (Nim) degradation in ultrapure water (UW) and municipal sewage (MS) via UV-ABC/H2O2 was investigated. The variables included in the experimental design were time, initial Nim, and initial H2O2 concentrations. Resulting decreases in Nim concentration (monitored by high performance liquid chromatography (HPLC) using a photodiode array detector operating at a maximum UV absorbance of 300 nm), mineralization (from total organic carbon (TOC) measurements), and ecotoxicity (assays employing the bioindicators Daphnia similis, Artemia salina, and Allium cepa) were also studied. Degradation rates of 90% or higher were found for 15-20 min reaction times, employing combinations of [H2O2] = 50-150 mg L-1 and [Nim] = 8.5-15 mg L-1 prepared with MS. Mineralization rates of 70% and higher were attained within 60 min of reaction for [Nim] = 15 mg L-1 prepared in MS with [H2O2] = 100 mg L-1. Nim by-products were detected and possible degradation pathways proposed. Ecotoxicity evaluation using A. salina, D. similis, and A. cepa revealed that the treated samples had significantly lower toxicity. Exposure to treated samples resulted in survival rates of 79% for A. salina and over 90% for D. similis. No root growth inhibition was observed in A. cepa exposed to treated samples, whereas exposure to untreated samples inhibited root growth by 60%. Statistical analysis revealed elimination of cytotoxicity and reduction of genotoxicity against A. cepa. The results showed that the UV-ABC/H2O2 process can be employed as a pre- or post-treatment method to remove Nim from contaminated wastewater.
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Affiliation(s)
- Débora Antonio da Silva
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS 79074-460, Brazil
| | - Rodrigo Pereira Cavalcante
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS 79074-460, Brazil
| | - Rebeca Fabbro Cunha
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS 79074-460, Brazil
| | - Amilcar Machulek
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS 79074-460, Brazil.
| | - Silvio César de Oliveira
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555, CP 549, Campo Grande, MS 79074-460, Brazil.
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de Melo da Silva L, Gozzi F, Sirés I, Brillas E, de Oliveira SC, Machulek A. Degradation of 4-aminoantipyrine by electro-oxidation with a boron-doped diamond anode: Optimization by central composite design, oxidation products and toxicity. THE SCIENCE OF THE TOTAL ENVIRONMENT 2018; 631-632:1079-1088. [PMID: 29727934 DOI: 10.1016/j.scitotenv.2018.03.092] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/13/2017] [Revised: 02/12/2018] [Accepted: 03/09/2018] [Indexed: 06/08/2023]
Abstract
Electro-oxidation with electrogenerated H2O2 (EO-H2O2) was applied to treat acidic aqueous solutions of 4-aminoantipyrine (4-AA), a persistent drug metabolite of dipyrone, in sulfate medium. Trials were made using a boron-doped diamond anode in the presence of H2O2 electrogenerated on site. A 24 central composite design (CCD) was employed to evaluate the effect of four independent variables, namely current density (j), pH, 4-AA concentration and electrolysis time, on the percentages of degradation and mineralization, as well as on mineralization current efficiency (MCE). Predicted responses agreed with observed values, showing linear trendlines with good R2 and R2adj values. The degradation was optimum at j=77.5mAcm-2, pH3.5 and 62.5mgL-1 4-AA, leading to 63% and 99% removal after 3 and 7min, respectively. For those solutions, the largest mineralization was found at j=77.5mAcm-2, attaining 45% abatement at 175min. Low MCE values were obtained in all electrolyses. An initial route for 4-AA degradation is proposed based on one dimer and eleven aromatic and aliphatic intermediates detected in the treated solutions at pH3.5 by LC-MS. The initial 62.5mgL-1 solution at pH3.5 presented acute toxicity on Artemia salina larvae, with LC50=13.6mgL-1, being substantially reduced after 3 and 7min of EO-H2O2 at j=77.5mAcm-2 due to the formation of less toxic derivatives.
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Affiliation(s)
- Lucas de Melo da Silva
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555; CP 549, Campo Grande, MS 79074-460, Brazil
| | - Fábio Gozzi
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555; CP 549, Campo Grande, MS 79074-460, Brazil
| | - Ignasi Sirés
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain.
| | - Enric Brillas
- Laboratori d'Electroquímica dels Materials i del Medi Ambient, Departament de Química Física, Facultat de Química, Universitat de Barcelona, c/Martí i Franquès 1-11, 08028 Barcelona, Spain
| | - Silvio Cesar de Oliveira
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555; CP 549, Campo Grande, MS 79074-460, Brazil
| | - Amilcar Machulek
- Institute of Chemistry, Federal University of Mato Grosso do Sul, Av. Senador Filinto Muller, 1555; CP 549, Campo Grande, MS 79074-460, Brazil.
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Kang YM, Kim MK, Zoh KD. Effect of nitrate, carbonate/bicarbonate, humic acid, and H 2O 2 on the kinetics and degradation mechanism of Bisphenol-A during UV photolysis. CHEMOSPHERE 2018; 204:148-155. [PMID: 29655107 DOI: 10.1016/j.chemosphere.2018.04.015] [Citation(s) in RCA: 49] [Impact Index Per Article: 8.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/21/2018] [Revised: 03/13/2018] [Accepted: 04/03/2018] [Indexed: 06/08/2023]
Abstract
In this study, the effects of natural water components (nitrate, carbonate/bicarbonate, and humic acid) on the kinetics and degradation mechanisms of bisphenol A (BPA) during UV-C photolysis and UV/H2O2 reaction were examined. The presence of NO3- (0.04-0.4 mM) and CO32-/HCO3- (0.4-4 mM) ions increased BPA degradation during UV photolysis. Humic acid less than 3 mg/L promoted BPA degradation, but greater than 3 mg/L of humic acid inhibited BPA degradation. During the UV/H2O2 reaction, all water matrix components acted as radical scavengers in the order of humic acid > CO32-/HCO3- > NO3-. All of the degradation reactions agreed with the pseudo-first-order kinetics. While eight byproducts (m/z = 122, 136, 139, 164, 181, 244, 273, 289) were identified in UV-C/NO3- photolysis reaction, four (m/z = 122, 136, 164, 244) and three byproducts (m/z = 122, 136, 164) were observed during UV-C/NO3-/CO32-/HCO3- and UV-C/CO32-/HCO3- reactions. Nitrogenated and hydrogenated byproducts were first observed during the UV-C/NO3- photolysis, but only hydrogenated byproducts as adducts were detected during the UV-C/NO3-/CO32-/HCO3- photolysis. Nitrogenated and hydrogenated byproducts were formed in the early stage of degradation by OH or NO2 radicals, and these byproducts were subsequently degraded into smaller compounds with further reaction during UV-C/NO3- and UV-C/NO3-/CO32-/HCO3- reactions. In contrast, BPA was directly degraded into smaller compounds by β-scission of the isopropyl group by CO3-/HCO3 radicals during UV-C/CO32-/HCO3- reaction. Our results imply that the water components can change the degradation mechanism of BPA during UV photolysis.
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Affiliation(s)
- Young-Min Kang
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea
| | - Moon-Kyung Kim
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea
| | - Kyung-Duk Zoh
- Department of Environmental Health Sciences, School of Public Health, Seoul National University, Seoul, South Korea.
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Saeid S, Behnajady MA, Tolvanen P, Salmi T. Optimization of Photooxidative Removal of Phenazopyridine from Water. RUSSIAN JOURNAL OF PHYSICAL CHEMISTRY A 2018. [DOI: 10.1134/s0036024418050266] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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Ahmed S, Sheraz MA, Ahmad I. Tolfenamic Acid. PROFILES OF DRUG SUBSTANCES, EXCIPIENTS, AND RELATED METHODOLOGY 2018; 43:255-319. [PMID: 29678262 DOI: 10.1016/bs.podrm.2018.01.001] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/19/2022]
Abstract
Tolfenamic acid (TA) is a nonsteroidal antiinflammatory drug and belongs to the group of fenamates. It is used as a potent pain reliever in the treatment of acute migraine attacks, and disorders like dysmenorrhea, rheumatoid, and osteoarthritis. TA has shown excellent in vitro antibacterial activity against certain ATCC strains of bacteria when complexed with bismuth(III). It has also been reported to block pathological processes associated with Alzheimer's disease. In the recent past, TA has also been used as a novel anticancer agent for the treatment of various cancers. In view of the clinical importance of TA, a comprehensive review of the physical and pharmaceutical properties and details of the various analytical methods used for the assay of the drug in pharmaceutical and biological systems has been made. The methods reviewed include identification tests and titrimetric, spectrophotometric, chromatographic, electrochemical, thermal, microscopic, enzymatic, and solid-state techniques. Along with the analytical profile, the stability and degradation of TA, its pharmacology and pharmacokinetics, dosage forms and dose, adverse effects and toxicity, and interactions have been discussed.
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Affiliation(s)
- Sofia Ahmed
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Karachi, Pakistan
| | - Muhammad Ali Sheraz
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Karachi, Pakistan
| | - Iqbal Ahmad
- Baqai Institute of Pharmaceutical Sciences, Baqai Medical University, Karachi, Pakistan
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Russo D, Siciliano A, Guida M, Galdiero E, Amoresano A, Andreozzi R, Reis NM, Li Puma G, Marotta R. Photodegradation and ecotoxicology of acyclovir in water under UV 254 and UV 254/H 2O 2 processes. WATER RESEARCH 2017; 122:591-602. [PMID: 28628881 DOI: 10.1016/j.watres.2017.06.020] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/06/2017] [Revised: 06/05/2017] [Accepted: 06/07/2017] [Indexed: 05/25/2023]
Abstract
The photochemical and ecotoxicological fate of acyclovir (ACY) through UV254 direct photolysis and in the presence of hydroxyl radicals (UV254/H2O2 process) were investigated in a microcapillary film (MCF) array photoreactor, which provided ultrarapid and accurate photochemical reaction kinetics. The UVC phototransformation of ACY was found to be unaffected by pH in the range from 4.5 to 8.0 and resembled an apparent autocatalytic reaction. The proposed mechanism included the formation of a photochemical intermediate (ϕACY = (1.62 ± 0.07)·10-3 mol ein-1) that further reacted with ACY to form by-products (k' = (5.64 ± 0.03)·10-3 M-1 s-1). The photolysis of ACY in the presence of hydrogen peroxide accelerated the removal of ACY as a result of formation of hydroxyl radicals. The kinetic constant for the reaction of OH radicals with ACY (kOH/ACY) determined with the kinetic modeling method was (1.23 ± 0.07)·109 M-1 s-1 and with the competition kinetics method was (2.30 ± 0.11)·109 M-1 s-1 with competition kinetics. The acute and chronic effects of the treated aqueous mixtures on different living organisms (Vibrio fischeri, Raphidocelis subcapitata, D. magna) revealed significantly lower toxicity for the samples treated with UV254/H2O2 in comparison to those collected during UV254 treatment. This result suggests that the addition of moderate quantity of hydrogen peroxide (30-150 mg L-1) might be a useful strategy to reduce the ecotoxicity of UV254 based sanitary engineered systems for water reclamation.
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Affiliation(s)
- Danilo Russo
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, p.le V. Tecchio 80, Napoli, Italy
| | - Antonietta Siciliano
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, via Cinthia 4, Napoli, Italy
| | - Marco Guida
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, via Cinthia 4, Napoli, Italy
| | - Emilia Galdiero
- Dipartimento di Biologia, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, via Cinthia 4, Napoli, Italy
| | - Angela Amoresano
- Dipartimento di Scienze Chimiche, Università di Napoli Federico II, Complesso Universitario Monte Sant'Angelo, via Cinthia 4, Napoli, Italy
| | - Roberto Andreozzi
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, p.le V. Tecchio 80, Napoli, Italy
| | - Nuno M Reis
- Department of Chemical Engineering, University of Bath, Claverton Down, Bath, BA2 7AY, UK; Environmental Nanocatalysis & Photoreaction Engineering Department of Chemical Engineering, Loughborough University, Loughborough, LE11 3TU, UK
| | - Gianluca Li Puma
- Environmental Nanocatalysis & Photoreaction Engineering Department of Chemical Engineering, Loughborough University, Loughborough, LE11 3TU, UK.
| | - Raffaele Marotta
- Dipartimento di Ingegneria Chimica, dei Materiali e della Produzione Industriale, Università di Napoli Federico II, p.le V. Tecchio 80, Napoli, Italy.
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