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Ye Z, Jiang Y, Fan W, Zhang X, Wu P. Photosensitized Reduction and Polymerization for One-Step Preparation of Leucomethylene Blue Hydrogel as a Visual Indicator for Both Gaseous and Dissolved Oxygen. Anal Chem 2024. [PMID: 39193901 DOI: 10.1021/acs.analchem.4c02260] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/29/2024]
Abstract
Oxygen is crucial for many chemical and biological processes, and its facile detection is of great significance in our daily lives. In this study, we report a leucomethylene blue (LMB)-encapsulated hydrogel visual indicator for the detection of both gaseous and dissolved Oxygen (DO). The photosensitization of methylene blue (MB) not only lead to its reduction to colorless LMB but also resulted in hydrogel polymerization, thus allowing the one-step preparation of the LMB-hydrogel. Meanwhile, the photosensitized reduction of MB was quite fast (5000-fold faster than the classical glucose reduction). In this manner, the blue color of MB could be completely decayed within only 1 min. Also, the efficient polymerization triggered by MB photosensitization ensured the rapid preparation of LMB hydrogels within 10 min. By placing the oxygen indicator in air or water, oxygen can specifically oxidize the colorless LMB-hydrogel to the blue MB-hydrogel. When coupled with a smartphone, the oxygen indicator exhibited a linear response to DO in the range 0.23-10 mg/L with a detection limit of 0.077 mg/L. The LMB-hydrogel indicator was successfully explored for visual evaluation of vacuum degree during food packaging. The LMB-hydrogel, with the advantages of low cost, ease of preparation, as well as facile use, is a promising visual indicator for both gaseous and dissolved oxygen, especially for in-house usage.
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Affiliation(s)
- Ziyi Ye
- State Key Lab of Geohazard prevention & Geoenvironment protection, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Yujiao Jiang
- State Key Lab of Geohazard prevention & Geoenvironment protection, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Wentong Fan
- Analytical & Testing Center, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China
| | - Xinfeng Zhang
- State Key Lab of Geohazard prevention & Geoenvironment protection, College of Materials and Chemistry & Chemical Engineering, Chengdu University of Technology, Chengdu 610059, China
| | - Peng Wu
- Analytical & Testing Center, Sichuan University, 29 Wangjiang Road, Chengdu 610064, China
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Prada-Vásquez MA, Pituco MM, Caixeta MP, Cardona Gallo SA, Botero-Coy AM, Hernández F, Torres-Palma RA, Vilar VJP. Ozonation using a stainless-steel membrane contactor: Gas-liquid mass transfer and pharmaceuticals removal from secondary-treated municipal wastewater. CHEMOSPHERE 2024; 349:140888. [PMID: 38070615 DOI: 10.1016/j.chemosphere.2023.140888] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/18/2023] [Revised: 12/01/2023] [Accepted: 12/02/2023] [Indexed: 01/10/2024]
Abstract
A tubular porous stainless steel membrane contactor was characterized in terms of ozone-water mass transport, as well as its application in removing 23 pharmaceuticals (PhACs) detected in the secondary-treated municipal wastewater, under continuous mode operation. The volumetric mass transfer coefficient (KLa) was evaluated based on liquid flow rate, gas flow rate, and ozone gas concentration. The KLa values were substantially improved with an increment in liquid flow rate (1.6 times from 30 to 70 dm3 h-1) and gas flow rate (3.6 times from 0.30 to 0.85 Ndm3 min-1) due to the improved mixing in the gas-liquid interface. For the lowest liquid flow rate (30 dm3 h-1), the water phase boundary layer (82%) exhibited the major ozone transfer resistance, but it became almost comparable with membrane resistance for the highest liquid flow rate (70 dm3 h-1). Additionally, the influence of the specific ozone dose (0.39, 0.53, and 0.69 g O3 g DOC-1) and ozone inlet gas concentration ( [Formula: see text] = 27, 80, and 134 g Nm-3) were investigated in the elimination of 23 PhACs found in secondary-treated municipal wastewater. An ozone dose of 0.69 g O3 g DOC-1 and residence time of 60 s resulted in the removal of 12 out of the 23 compounds over 80%, while 17 compounds were abated above 60%. The elimination of PhACs was strongly correlated with kinetic reaction constants values with ozone and hydroxyl radicals (kO3 and kHO•), leading to a characteristic elimination pattern for each group of contaminants. This study demonstrates the high potential of membrane contactors as an appealing alternative for ozone-driven wastewater treatment.
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Affiliation(s)
- María A Prada-Vásquez
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Minas, Departamento de Geociencias y Medioambiente, Medellín, Colombia; Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia; LSRE-LCM - Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Mateus Mestriner Pituco
- LSRE-LCM - Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Mateus P Caixeta
- LSRE-LCM - Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Santiago A Cardona Gallo
- Universidad Nacional de Colombia, Sede Medellín, Facultad de Minas, Departamento de Geociencias y Medioambiente, Medellín, Colombia
| | - Ana M Botero-Coy
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water, University Jaume I, Castelló, Spain
| | - Félix Hernández
- Environmental and Public Health Analytical Chemistry, Research Institute for Pesticides and Water, University Jaume I, Castelló, Spain
| | - Ricardo A Torres-Palma
- Grupo de Investigación en Remediación Ambiental y Biocatálisis (GIRAB), Instituto de Química, Facultad de Ciencias Exactas y Naturales, Universidad de Antioquia UdeA, Calle 70 No. 52-21, Medellín, Colombia
| | - Vítor J P Vilar
- LSRE-LCM - Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal; ALiCE - Associate Laboratory in Chemical Engineering, Faculty of Engineering, University of Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal.
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Zhang H, Zhang K, Zhiguo Z, Hao J. Enhancement of oxygen sensing performance of metalloporphyrin film modified with nano Al 2O 3 powder. Heliyon 2023; 9:e18300. [PMID: 37519686 PMCID: PMC10372395 DOI: 10.1016/j.heliyon.2023.e18300] [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: 03/06/2023] [Revised: 07/12/2023] [Accepted: 07/13/2023] [Indexed: 08/01/2023] Open
Abstract
In this work, the metalloporphyrin film of PtOEP/Poly (St-co-TFEMA) modified by nano Al2O3 powder was prepared, and the enhancement performance of oxygen sensing was studied in detail. It was verified that the modified film extended the residence time of oxygen through the characterization of SEM. The phosphorescence intensity changes with the content of Al2O3 and PtOEP were studied. The Stern-Volmer equations before and after modification of Al2O3 powder was compared. It was found that the linearity of the calibration curve was still high, but the oxygen sensitivity value of KSV was significantly improved due to the increase of quenching probability between indicator and oxygen. Finally, the stability test shows that the Al2O3@PtOEP/Poly (St-co-TFEMA) oxygen sensing film presents a strong anti-photo-bleaching ability, and the response time is shortened.
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Affiliation(s)
- Honglin Zhang
- College of General Education, Guangzhou Huali College, Guangzhou, 511325, China
| | - Ke Zhang
- MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage, School of Chemistry and Chemical Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Zhiguo Zhiguo
- School of Instrumentation Science and Engineering, Harbin Institute of Technology, Harbin, 150001, China
| | - Jian Hao
- State Key Laboratory of High-efficiency Utilization of Coal and Green Chemical Engineering, Ningxia University, Yinchuan, 750021, China
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Er Z, Gong P, Zhou J, Wang Y, Jiang X, Xie L. Dissolved oxygen sensor based on the fluorescence quenching method with optimal modulation frequency. APPLIED OPTICS 2022; 61:4865-4873. [PMID: 36255971 DOI: 10.1364/ao.457805] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/09/2022] [Accepted: 05/11/2022] [Indexed: 06/16/2023]
Abstract
Measurement of dissolved oxygen (DO) in liquid samples is of vital importance in both industrial and biomedical fields. In this paper, a DO sensor based on the fluorescence quenching method has been built. The measurement principle is based on fluorescence lifetime detection, which is indicated by the phase difference between an excitation light signal and a fluorescence signal. The nonlinear effect of the fluorescent material has been taken into consideration to obtain a more accurate fitting model. The performance of the system varying with the modulation frequency of excitation light signals is also reported. Modulation frequency mainly affects the sensitivity and phase resolution ratio of the system. The system at the optimized modulation frequency has a good degree of fitting with R2 value of 0.9981 and a small relative error of 0.79%. The study shows that this kind of sensor with optimal modulation frequency has good performance, which can be used in many important fields.
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