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Dey A, Korde S, Gogate PR, Agarkoti C. Sonochemical synthesis of Ce-TiO 2 nanocatalyst and subsequent application for treatment of real textile industry effluent. ULTRASONICS SONOCHEMISTRY 2023; 96:106426. [PMID: 37156159 DOI: 10.1016/j.ultsonch.2023.106426] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/23/2023] [Revised: 03/31/2023] [Accepted: 04/28/2023] [Indexed: 05/10/2023]
Abstract
Treatment of real textile industry effluent using photocatalysis, sonocatalysis, sonophotocatalysis and H2O2 assisted sonophotocatalysis have been studied based on the use of Ce-TiO2 nanocatalyst synthesized using sonochemical co-precipitation method. Characterization studies of the obtained catalyst revealed crystallite size as 1.44 nm with particles having spherical morphology. A shift of the absorption edge to the visible light range was also observed in UV-Vis diffuse reflectance spectra (UV-DRS) analysis. The effects of different operational parameters viz catalyst dose (0.5 g/L-2 g/L), temperature (30 °C-55 °C) and pH (3-12) on the COD reduction were studied. The reduction in the COD was higher at lower pH and the optimum temperature established was 45 °C. It was also elucidated that the required catalyst dose was lesser in combined sonophotocatalysis when compared with individual photocatalysis and sonocatalysis. Combination of processes and addition of oxidants increased the COD reduction with the sonophotocatalytic oxidation combined with H2O2 treatment showing the best results for COD reduction (84.75%). The highest reduction in COD for photocatalysis was only 45.09% and for sonocatalysis, it was marginally higher at 58.62%. The highest reduction in COD achieved by sonophotocatalysis was 64.41%. Toxicity tests coupled with Liquid Chromatography Mass Spectrometry (LC-MS) analysis revealed that there were no additional toxic intermediates added to the system during the treatment. Kinetic study allowed establishing that generalized kinetic model fits the experimental results well. Overall, the combined advanced oxidation processes showed better results than the individual processes with higher COD reduction and lower requirement of the catalyst.
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Affiliation(s)
- Ananya Dey
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India; NMIMS Mukesh Patel School of Technology Management & Engineering, Mumbai, India
| | - Shrivatsa Korde
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
| | - Parag R Gogate
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India.
| | - Chandrodai Agarkoti
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400 019, India
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Moradi S, Rodriguez-Seco C, Hayati F, Ma D. Sonophotocatalysis with Photoactive Nanomaterials for Wastewater Treatment and Bacteria Disinfection. ACS NANOSCIENCE AU 2023; 3:103-129. [PMID: 37096232 PMCID: PMC10119989 DOI: 10.1021/acsnanoscienceau.2c00058] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/29/2022] [Revised: 01/06/2023] [Accepted: 01/09/2023] [Indexed: 04/26/2023]
Abstract
Sonophotocatalysis is described as a combination of two individual processes of photocatalysis and sonocatalysis. It has proven to be highly promising in degrading dissolved contaminants in wastewaters as well as bacteria disinfection applications. It eliminates some of the main disadvantages observed in each individual technique such as high costs, sluggish activity, and prolonged reaction times. The review has accomplished a critical analysis of sonophotocatalytic reaction mechanisms and the effect of the nanostructured catalyst and process modification techniques on the sonophotocatalytic performance. The synergistic effect between the mentioned processes, reactor design, and the electrical energy consumption has been discussed due to their importance when implementing this novel technology in practical applications, such as real industrial or municipal wastewater treatment plants. The utilization of sonophotocatalysis in disinfection and inactivation of bacteria has also been reviewed. In addition, we further suggest improvements to promote this technology from the lab-scale to large-scale applications. We hope this up-to-date review will advance future research in this field and push this technology toward widespread adoption and commercialization.
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Affiliation(s)
- Sina Moradi
- Institut
National de la Recherche Scientifique (INRS)-Centre Énergie
Materiaux et Telécommunications, 1650 Boulevard Lionel-Boulet, VarennesJ3X 1P7, Québec, Canada
| | - Cristina Rodriguez-Seco
- Institut
National de la Recherche Scientifique (INRS)-Centre Énergie
Materiaux et Telécommunications, 1650 Boulevard Lionel-Boulet, VarennesJ3X 1P7, Québec, Canada
| | - Farzan Hayati
- Department
of Chemical and Biological Engineering, University of Saskatchewan, SaskatoonS7N 5A9, SK, Canada
| | - Dongling Ma
- Institut
National de la Recherche Scientifique (INRS)-Centre Énergie
Materiaux et Telécommunications, 1650 Boulevard Lionel-Boulet, VarennesJ3X 1P7, Québec, Canada
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Mehdaoui R, Agren S, El Haskouri J, Beyou E, Lahcini M, Baouab MHV. An optimized sono-heterogeneous Fenton degradation of olive-oil mill wastewater organic matter by new magnetic glutarlaldehyde-crosslinked developed cellulose. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2023; 30:20450-20468. [PMID: 36258114 DOI: 10.1007/s11356-022-23276-2] [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: 05/04/2022] [Accepted: 09/21/2022] [Indexed: 06/16/2023]
Abstract
The present study highlights the olive mill wastewater (OMW) treatment characteristics through a sono-heterogeneous Fenton process using new designed [GTA-(PDA-g-DAC) @Fe3O4] and characterized by Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), thermogravimetric analysis (TGA), magnetic properties measurements, and point of zero charge (pH pzc) analysis. A preliminary removal study showed significant degradation efficiency (75%) occurred combining the magnetic synthesized catalyst [GTA-(PDA-g-DAC)@Fe3O4] ([catalyst] = 2 g/L) with US /H2O2 and maintaining 500WL-1 ultrasonic power (US). The values obtained by US only were (13%), H2O2/US (18%), US/Fe3O4 (28%), and US /Fe3O4/H2O2(35%). The catalytic findings have shown that [GTA-(PDA-g-DAC)@Fe3O4] exhibited good properties for OMW compound's degradation. The sonocatalytic process coupling and extra oxidant addition resulted in the degradation substantial levels. For instance, the concomitant effect of degradation optimized parameters; H2O2 10 mM, [GTA-(PDA-g-DAC) @Fe3O4] nanocomposites 2.5 g/L, at pH 3, and T 35 °C for 70 min resulted in an almost complete mineralization of aqueous OMW solution followed by a significant decolorization. Oxidation results exhibited efficient degradation rates in total phenolic compounds (TPC), total amino compounds (TAC), and chemical oxygen demand (COD) oxidation rate were 89.88, 92.75, and 95.66 respectively following the optimized sono-heterogeneous catalytic Fenton process. The prepared magnetic catalyst exhibited a good stability during repeated cycles. The gathered findings gave the evidence that sono-heterogeneous catalytic Fenton process is a promising treatment technology for OMW effluents.
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Affiliation(s)
- Rahma Mehdaoui
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia
| | - Soumaya Agren
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia
- Department of Inorganic Chemistry, Instituto de Ciencias de Los Materiales de la Universitad de Valencia, Calle Catedratico José Beltran 2, 46980, Paterna, Valencia, Spain
| | - Jamal El Haskouri
- Department of Inorganic Chemistry, Instituto de Ciencias de Los Materiales de la Universitad de Valencia, Calle Catedratico José Beltran 2, 46980, Paterna, Valencia, Spain
| | - Emmanuel Beyou
- Department of Material's Engineering, Université Lyon 1, UMR CNRS5223, Ingénierie des Matériaux Polymères, Villeurbanne, France
| | - Mohammed Lahcini
- Laboratory of organometallic and macromolecular chemistry-composites Materials, Faculty of Sciences and Technologies, Cadi Ayyad University, Avenue Abdelhakim Elkhattabi, BP549, 40000, Marrakech, Morocco
- Mohamed VI Polytechnic University, Lot 660, Hay Moulay Rachid, 43150, Ben Guerir, Morocco
| | - Mohamed Hassen V Baouab
- Research Unit Materials and Organic Synthesis (UR17ES31), Preparatory Institute for Engineering Studies of Monastir, University of Monastir, Avenue of the Environment, 5000, Monastir, Tunisia.
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Ikram M, Aslam S, Haider A, Naz S, Ul-Hamid A, Shahzadi A, Ikram M, Haider J, Ahmad SOA, Butt AR. Doping of Mg on ZnO Nanorods Demonstrated Improved Photocatalytic Degradation and Antimicrobial Potential with Molecular Docking Analysis. NANOSCALE RESEARCH LETTERS 2021; 16:78. [PMID: 33934207 PMCID: PMC8088420 DOI: 10.1186/s11671-021-03537-8] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/03/2021] [Accepted: 04/22/2021] [Indexed: 05/22/2023]
Abstract
Various concentrations of Mg-doped ZnO nanorods (NRs) were prepared using co-precipitation technique. The objective of this study was to improve the photocatalytic properties of ZnO. The effect of Mg doping on the structure, phase constitution, functional groups presence, optical properties, elemental composition, surface morphology and microstructure of ZnO was evaluated with XRD, FTIR, UV-Vis spectrophotometer, EDS, and HR-TEM, respectively. Optical absorption spectra obtained from the prepared samples showed evidence of blueshift upon doping. XRD results revealed hexagonal wurtzite phase of nanocomposite with a gradual decrease in crystallite size with Mg addition. PL spectroscopy showed trapping efficiency and migration of charge carriers with electron-hole recombination behavior, while HR-TEM estimated interlayer d-spacing. The presence of chemical bonding, vibration modes and functional groups at the interface of ZnO was revealed by FTIR and Raman spectra. In this study, photocatalytic, sonocatalytic and sonophotocatalytic performance of prepared NRs was systematically investigated by degrading a mixture of methylene blue and ciprofloxacin (MBCF). Experimental results suggested that improved degradation performance was shown by Mg-doped ZnO NRs. We believe that the product synthesized in this study will prove to be a beneficial and promising photocatalyst for wastewater treatment. Conclusively, Mg-doped ZnO exhibited substantial (p < 0.05) efficacy against gram-negative (G-ve) as compared to gram-positive (G+ve) bacteria. In silico molecular docking studies of Mg-doped ZnO NRs against DHFR (binding score: - 7.518 kcal/mol), DHPS (binding score: - 6.973 kcal/mol) and FabH (- 6.548 kcal/mol) of E. coli predicted inhibition of given enzymes as possible mechanism behind their bactericidal activity.
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Affiliation(s)
- Muhammad Ikram
- Solar Cell Applications Research Lab, Department of Physics, Government College University, Lahore, Punjab, 54000, Pakistan.
| | - Sidra Aslam
- Physics Department, Lahore Garrison University, Lahore, Punjab, 54000, Pakistan
| | - Ali Haider
- Department of Clinical Medicine and Surgery, University of Veterinary and Animal Sciences, Lahore, Punjab, 54000, Pakistan
| | - Sadia Naz
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Anwar Ul-Hamid
- Core Research Facilities, King Fahd University of Petroleum & Minerals, Dhahran, 31261, Saudi Arabia.
| | - Anum Shahzadi
- University College of Pharmacy, University of the Punjab, Lahore, 54000, Pakistan
| | - Mujtaba Ikram
- Institute of Chemical Engineering and Technology (ICET), University of the Punjab, Lahore, 54000, Pakistan
| | - Junaid Haider
- Tianjin Institute of Industrial Biotechnology, Chinese Academy of Sciences, Tianjin, 300308, China
| | - Syed Ossama Ali Ahmad
- Solar Cell Applications Research Lab, Department of Physics, Government College University, Lahore, Punjab, 54000, Pakistan
| | - Alvina Rafiq Butt
- Physics Department, Lahore Garrison University, Lahore, Punjab, 54000, Pakistan
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Eshaq G, Wang S, Sun H, Sillanpää M. Core/shell FeVO4@BiOCl heterojunction as a durable heterogeneous Fenton catalyst for the efficient sonophotocatalytic degradation of p-nitrophenol. Sep Purif Technol 2020. [DOI: 10.1016/j.seppur.2019.115915] [Citation(s) in RCA: 30] [Impact Index Per Article: 7.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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6
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Panda D, Manickam S. Hydrodynamic cavitation assisted degradation of persistent endocrine-disrupting organochlorine pesticide Dicofol: Optimization of operating parameters and investigations on the mechanism of intensification. ULTRASONICS SONOCHEMISTRY 2019; 51:526-532. [PMID: 30224289 DOI: 10.1016/j.ultsonch.2018.04.003] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/22/2018] [Revised: 04/03/2018] [Accepted: 04/09/2018] [Indexed: 05/09/2023]
Abstract
Dicofol, a recommended Stockholm convention persistent organic pollutants (POPs) candidate is well known for its endocrine disruptive properties and has been extensively used as an organochlorine pesticide worldwide. The hydrodynamic cavitation (HC) treatment of Dicofol in aqueous media induced by a liquid whistle hydrodynamic cavitaion reactor (LWHCR) has been investigated while considering important parameters such as inlet pressure, initial concentration of Dicofol, solution temperature, pH, addition of H2O2 and radical scavenger for the extent of degradation. The pseudo-first-order degradation rate constant (k) was determined to be 0.073 min-1 with a cavitational yield of 1.26 × 10-5 mg/J at optimum operating conditions and a complete removal of Dicofol was achieved within 1 h of treatment. Considering the removal rate and energy efficiency, the optimal inlet pressure was found to be 7 bar, resulting in a cavitation number of 0.17. High performance liquid chromatography (HPLC) and Gas chromatography mass spectroscopy (GC-MS) analyses indicated a sharp decline in the concentration of Dicofol with treatment time and indicated the presence of degraded products. An 85% total organic carbon (TOC) removal was achieved within 1 h of treatment time, demonstrating successful mineralization of Dicofol. The obtained results suggest that the degradation of Dicofol followed thermal decomposition and successive recombination reactions at bubble-vapor interface. Overall, the attempted hydrodynamic cavitation demonstrated successful and rapid removal of endocrine disruptive chemicals such as Dicofol and is expected to provide efficient solution for wastewater treatment.
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Affiliation(s)
- Debabrata Panda
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia
| | - Sivakumar Manickam
- Department of Chemical and Environmental Engineering, Faculty of Engineering, University of Nottingham Malaysia Campus, 43500 Semenyih, Selangor, Malaysia.
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7
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Photocatalytic performance and photodegradation kinetics of Fenton-like process based on haematite nanocrystals for basic dye removal. SN APPLIED SCIENCES 2019. [DOI: 10.1007/s42452-019-0286-x] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022] Open
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8
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Metheniti ME, Frontistis Z, Ribeiro RS, Silva AMT, Faria JL, Gomes HT, Mantzavinos D. Degradation of propyl paraben by activated persulfate using iron-containing magnetic carbon xerogels: investigation of water matrix and process synergy effects. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:34801-34810. [PMID: 28986771 DOI: 10.1007/s11356-017-0178-9] [Citation(s) in RCA: 17] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/30/2017] [Accepted: 09/11/2017] [Indexed: 06/07/2023]
Abstract
An advanced oxidation process comprising an iron-containing magnetic carbon xerogel (CX/Fe) and persulfate was tested for the degradation of propyl paraben (PP), a contaminant of emerging concern, in various water matrices. Moreover, the effect of 20 kHz ultrasound or light irradiation on process performance was evaluated. The pseudo-first order degradation rate of PP was found to increase with increasing SPS concentration (25-500 mg/L) and decreasing PP concentration (1690-420 μg/L) and solution pH (9-3). Furthermore, the effect of water matrix on kinetics was detrimental depending on the complexity (i.e., wastewater, river water, bottled water) and the concentration of matrix constituents (i.e., humic acid, chloride, bicarbonate). The simultaneous use of CX/Fe and ultrasound as persulfate activators resulted in a synergistic effect, with the level of synergy (between 35 and 50%) depending on the water matrix. Conversely, coupling CX/Fe with simulated solar or UVA irradiation resulted in a cumulative effect in experiments performed in ultrapure water.
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Affiliation(s)
- Maria Evangelia Metheniti
- Department of Chemical Engineering, University of Patras, Caratheodory 1, University Campus, GR-26504, Patras, Greece
| | - Zacharias Frontistis
- Department of Chemical Engineering, University of Patras, Caratheodory 1, University Campus, GR-26504, Patras, Greece
| | - Rui S Ribeiro
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Adrián M T Silva
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Joaquim L Faria
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465, Porto, Portugal
| | - Helder T Gomes
- Laboratory of Separation and Reaction Engineering-Laboratory of Catalysis and Materials (LSRE-LCM), Escola Superior de Tecnologia e Gestão, Instituto Politécnico de Bragança, Campus de Santa Apolónia, 5300-253, Bragança, Portugal
| | - Dionissios Mantzavinos
- Department of Chemical Engineering, University of Patras, Caratheodory 1, University Campus, GR-26504, Patras, Greece.
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Montemurro N, García-Vara M, Peña-Herrera JM, Lladó J, Barceló D, Pérez S. Conventional and Advanced Processes for the Removal of Pharmaceuticals and Their Human Metabolites from Wastewater. ACTA ACUST UNITED AC 2018. [DOI: 10.1021/bk-2018-1302.ch002] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/01/2023]
Affiliation(s)
- Nicola Montemurro
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA), Spanish National Research Council (CSIC), Barcelona 08034, Spain
| | - Manuel García-Vara
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA), Spanish National Research Council (CSIC), Barcelona 08034, Spain
| | - Juan Manuel Peña-Herrera
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA), Spanish National Research Council (CSIC), Barcelona 08034, Spain
| | - Jordi Lladó
- Department of Mining, Industrial and TIC Engineering (EMIT), Universitat Politécnica de Catalunya (UPC), Manresa, Barcelona 08242, Spain
| | - Damià Barceló
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA), Spanish National Research Council (CSIC), Barcelona 08034, Spain
| | - Sandra Pérez
- Water and Soil Quality Research Group, Department of Environmental Chemistry (IDAEA), Spanish National Research Council (CSIC), Barcelona 08034, Spain
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10
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Degradation of antibiotic sulfamethoxazole by biochar-activated persulfate: Factors affecting the activation and degradation processes. Catal Today 2018. [DOI: 10.1016/j.cattod.2017.12.028] [Citation(s) in RCA: 107] [Impact Index Per Article: 17.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022]
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12
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Sunasee S, Wong KT, Lee G, Pichiah S, Ibrahim S, Park C, Kim NC, Yoon Y, Jang M. Titanium dioxide-based sonophotocatalytic mineralization of bisphenol A and its intermediates. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2017; 24:15488-15499. [PMID: 28512708 DOI: 10.1007/s11356-017-9124-0] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/26/2016] [Accepted: 04/26/2017] [Indexed: 06/07/2023]
Abstract
In this study, bisphenol A (BPA) removal by sonophotocatalysis coupled with commercially available titanium dioxide (TiO2, P25) was assessed in batch tests using energy-based advanced oxidation combining ultrasound (US) and ultraviolet (UV). The kinetics of BPA removal were systematically evaluated by changing operational parameters, such as US frequency and power, mechanical stirring speed, and temperature, but also comparison of single and coupled systems under the optimum US conditions (35 kHz, 50 W, 300 rpm stirring speed, and 20 °C). The combination of US/UV/P25 exhibited the highest BPA removal rate (28.0 × 10-3 min-1). In terms of the synergy index, the synergistic effect of sonophotocatalysis was found to be 2.2. This indicated that sonophotocatalysis has a considerably higher removal efficiency than sonocatalysis or photocatalysis. The removal of BPA was further investigated to identify BPA byproducts and intermediates using high-performance liquid chromatography-mass spectrometry. Five main intermediates were formed during sonophotocatalytic degradation, and complete removal of BPA and its intermediates was obtained after 3 h of operation. The degradation pathway of BPA by sonophotocatalysis was also elucidated.
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Affiliation(s)
- Sharmini Sunasee
- Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Kien Tiek Wong
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea
| | - Gooyong Lee
- Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia
| | - Saravanan Pichiah
- Department of Environmental Science and Engineering, Indian School of Mines, Sardar Patel Nagar, Dhanbad, Jharkhand, 826004, India
| | - Shaliza Ibrahim
- Department of Civil Engineering, Faculty of Engineering, University of Malaya, 50603, Kuala Lumpur, Malaysia.
| | - Chulhwan Park
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea
| | - Nam Chan Kim
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea
| | - Yeomin Yoon
- Department of Civil and Environmental Engineering, University of South Carolina, Columbia, SC, 29208, USA
| | - Min Jang
- Department of Environmental Engineering, Kwangwoon University, 20 Kwangwoon-Ro, Nowon-Gu, Seoul, 01897, Republic of Korea.
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Chatel G, Valange S, Behling R, Colmenares JC. A Combined Approach using Sonochemistry and Photocatalysis: How to Apply Sonophotocatalysis for Biomass Conversion? ChemCatChem 2017. [DOI: 10.1002/cctc.201700297] [Citation(s) in RCA: 29] [Impact Index Per Article: 4.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Affiliation(s)
| | - Sabine Valange
- Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP); Université de Poitiers, CNRS, ENSIP, B1; 1 rue Marcel Doré 86073 Poitiers Cedex 9 France
| | - Ronan Behling
- Institut de Chimie des Milieux et Matériaux de Poitiers (IC2MP); Université de Poitiers, CNRS, ENSIP, B1; 1 rue Marcel Doré 86073 Poitiers Cedex 9 France
| | - Juan Carlos Colmenares
- Institute of Physical Chemistry; Polish Academy of Sciences; Kasprzaka 44/52 01-224 Warsaw Poland
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Sponza DT, Oztekin R. Treatment of olive mill wastewater by photooxidation with ZrO2-doped TiO2 nanocomposite and its reuse capability. ENVIRONMENTAL TECHNOLOGY 2015; 37:865-879. [PMID: 26560364 DOI: 10.1080/09593330.2015.1088579] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Zirconium dioxide (zirconia, ZrO2)-doped TiO2 (TiO2/ZrO2) nanocomposite was used for the photocatalytic oxidation of pollutant parameters [COD components (CODtotal, CODdissolved and CODinert)], polyphenols (catechol, 3-hydroxybenzoic acid, tyrosol and 4-hydroxybenzoic acid) and total polyaromatic amines [aniline, 4-nitroaniline, o-toluidine and o-anisidine] from the olive mill effluent wastewaters at different operational conditions such as at different mass ratios of ZrO2 (50, 25, 14, 10 and 5 wt%) in the TiO2/ZrO2 nanocomposite, at different TiO2/ZrO2 photocatalyst concentrations (1, 4, 15 and 50 mg/L) and pH values (4.0-7.0-10.0) under 300 W UV irradiations, respectively. Under the optimized conditions (pH = 4.6, 15 mg/L ZrO2/TiO2 nanocomposite with a ZrO2 mass ratio of 14 wt%, 300 W UV light, after 60 min photooxidation time, at 21°C), the maximum CODdissolved, total phenol and total aromatic amines photooxidation yields were 99%, 89% and 95%, respectively. High pollutant removal (89%) yields after sequential five times utilization of ZrO2/TiO2 nanocomposite show that this catalyst can be effectively used commercially in the treatment of olive mill effluent.
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Affiliation(s)
- Delia Teresa Sponza
- a Department of Environmental Engineering, Engineering Faculty , Dokuz Eylül University , Tınaztepe Campus, 35160 Buca/İzmir , Turkey
| | - Rukiye Oztekin
- a Department of Environmental Engineering, Engineering Faculty , Dokuz Eylül University , Tınaztepe Campus, 35160 Buca/İzmir , Turkey
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15
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Weber B, Chavez A, Morales-Mejia J, Eichenauer S, Stadlbauer EA, Almanza R. Wet air oxidation of resorcinol as a model treatment for refractory organics in wastewaters from the wood processing industry. JOURNAL OF ENVIRONMENTAL MANAGEMENT 2015; 161:137-143. [PMID: 26164636 DOI: 10.1016/j.jenvman.2015.06.046] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2015] [Revised: 06/20/2015] [Accepted: 06/23/2015] [Indexed: 06/04/2023]
Abstract
Wastewater treatment systems are important tools to enhance sustainability in terms of reducing environmental impact and complying with sanitary requirements. This work addresses the wet air oxidation (WAO) process for pre-treatment of phenolic wastewater effluents. The aim was to increase biodegradability prior to a subsequent anaerobic stage. In WAO laboratory experiments using a micro-autoclave, the model compound resorcinol was degraded under different oxygen availability regims within the temperature range 150 °C-270 °C. The activation energy was determined to be 51.5 kJ/mol. Analysis of the products revealed that after 3 h of reaction at 230 °C, 97.5% degradation of resorcinol was achieved. At 250 °C and the same reaction time complete removal of resorcinol was observed. In this case the total organic carbon content was reduced down to 29%, from 118.0 mg/L down to 34.4 mg/L. Under these process conditions, the pollutant was only partially mineralized and the ratio of the biological oxygen demand relative to the chemical oxygen demand, which is 0.07 for resorcinol, was increased to a value exceeding 0.5. The main by-product acetic acid, which is a preferred compound for methanogenic bacteria, was found to account for 33% of the total organic carbon.
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Affiliation(s)
- Bernd Weber
- Universidad Autónoma del Estado de México-Facultad de Ingeniería, Cerro de Coatepec s/n Col. San Buenaventura, C.P. 50130 Toluca, Estado de México, México; Instituto de Ingeniería de la Universidad Nacional Autónoma de México (UNAM), C.P. 04510 Coyoacán, México, D.F., México.
| | - Alma Chavez
- Instituto de Ingeniería de la Universidad Nacional Autónoma de México (UNAM), C.P. 04510 Coyoacán, México, D.F., México
| | - Julio Morales-Mejia
- Instituto de Ingeniería de la Universidad Nacional Autónoma de México (UNAM), C.P. 04510 Coyoacán, México, D.F., México
| | - Sabrina Eichenauer
- Competence Center for Energy and Environmental Engineering, University of Applied Sciences THM, Campus Giessen, 35390 Giessen, Germany
| | - Ernst A Stadlbauer
- Competence Center for Energy and Environmental Engineering, University of Applied Sciences THM, Campus Giessen, 35390 Giessen, Germany
| | - Rafael Almanza
- Instituto de Ingeniería de la Universidad Nacional Autónoma de México (UNAM), C.P. 04510 Coyoacán, México, D.F., México
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16
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Dinesh GK, Anandan S, Sivasankar T. Sonophotocatalytic treatment of Bismarck Brown G dye and real textile effluent using synthesized novel Fe(0)-doped TiO2 catalyst. RSC Adv 2015. [DOI: 10.1039/c4ra07685k] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Using a novel Fe(0)-TiO2-doped catalyst, the degradation of Bismarck Brown G dye was compared by means of advanced oxidation processes, such as sonolysis, photolysis (UV light) and sonophotolysis. The sonophotolysis methodology was also adopted for real textile effluent.
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Affiliation(s)
- G. Kumaravel Dinesh
- Department of Chemical Engineering
- National Institute of Technology
- Tiruchirappalli – 620 015
- India
| | - S. Anandan
- Department of Chemistry
- National Institute of Technology
- Tiruchirappalli – 620 015
- India
| | - T. Sivasankar
- Department of Chemical Engineering
- National Institute of Technology
- Tiruchirappalli – 620 015
- India
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17
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Martins RC, Ramos CM, Quinta-Ferreira RM. Low-Cost Catalysts To Enhance Ozone Action on the Depuration of Olive Mill Wastewaters. Ind Eng Chem Res 2014. [DOI: 10.1021/ie501187e] [Citation(s) in RCA: 22] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Rui C. Martins
- CIEPQPF −
Chemical
Engineering Processes and Forest Products Research Center, GERSE,
Group on Environment, Reaction and Separation Engineering, and Department
of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II − Rua Sı́lvio
Lima, 3030-790 Coimbra, Portugal
| | - Carina M. Ramos
- CIEPQPF −
Chemical
Engineering Processes and Forest Products Research Center, GERSE,
Group on Environment, Reaction and Separation Engineering, and Department
of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II − Rua Sı́lvio
Lima, 3030-790 Coimbra, Portugal
| | - Rosa M. Quinta-Ferreira
- CIEPQPF −
Chemical
Engineering Processes and Forest Products Research Center, GERSE,
Group on Environment, Reaction and Separation Engineering, and Department
of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II − Rua Sı́lvio
Lima, 3030-790 Coimbra, Portugal
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18
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Sponza DT, Oztekin R. Dephenolization, dearomatization and detoxification of olive mill wastewater with sonication combined with additives and radical scavengers. ULTRASONICS SONOCHEMISTRY 2014; 21:1244-1257. [PMID: 24315030 DOI: 10.1016/j.ultsonch.2013.10.011] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/13/2012] [Revised: 09/01/2013] [Accepted: 10/14/2013] [Indexed: 06/02/2023]
Abstract
In this study, the effects of some additives [manganese (III) oxide (Mn3O4), Cu(+2), Fe(0) and potassium iodate (KIO3)] and some radical scavengers [sodium carbonate (Na2CO3), perfluorohexane (C6F14) and t-butyl alcohol (C4H10O)] on the sonication of olive mill effluent wastewater (OMW) were investigated since the wastewaters of this industry are removed with low efficiencies. The maximum total phenol and total aromatic amines (TAAs) removal efficiencies were 88% and 79%, respectively, at 60°C with only 150 min sonication. The maximum phenol removal was found as 98% with 19 mg L(-1) perfluorohexane and 5 mg L(-1) Fe(0) while the maximum TAAs removal was 99% with 16 mg L(-1) KIO3. Catechol, tyrosol, quercetin, caffeic acid, 4-methyl catechol, 2-phenylphenol (2-PHE) and 3-phenyl phenol (3-PHE) were detected as phenol intermediates while trimethlyaniline, aniline, o-toluidine, o-anisidine, dimethylaniline, ethylbenzene and durene were identified as TAAs in the OMW. The maximum acute toxicity removals were 96% and 99% in Vibrio fischeri and Daphnia magna, respectively. Total phenol, TAAs and the toxicity in an OMW were removed efficiently and cost-effectively through sonication.
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Affiliation(s)
- Delia Teresa Sponza
- Department of Environmental Engineering, Engineering Faculty, Dokuz Eylül University, Tınaztepe Campus, 35160 Buca, İzmir, Turkey.
| | - Rukiye Oztekin
- Department of Environmental Engineering, Engineering Faculty, Dokuz Eylül University, Tınaztepe Campus, 35160 Buca, İzmir, Turkey
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19
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Ahmad M, Ahmed E, Hong ZL, Ahmed W, Elhissi A, Khalid NR. Photocatalytic, sonocatalytic and sonophotocatalytic degradation of Rhodamine B using ZnO/CNTs composites photocatalysts. ULTRASONICS SONOCHEMISTRY 2014; 21:761-773. [PMID: 24055646 DOI: 10.1016/j.ultsonch.2013.08.014] [Citation(s) in RCA: 101] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/21/2013] [Revised: 08/21/2013] [Accepted: 08/23/2013] [Indexed: 06/02/2023]
Abstract
A series of ZnO nanoparticles decorated on multi-walled carbon nanotubes (ZnO/CNTs composites) was synthesized using a facile sol method. The intrinsic characteristics of as-prepared nanocomposites were studied using a variety of techniques including powder X-ray diffraction (XRD), high resolution transmission electron microscope (HR-TEM), transmission electron microscope (TEM), scanning electron microscope (SEM) with energy dispersive X-ray analysis (EDX), Brunauer Emmett Teller (BET) surface area analyzer and X-ray photoelectron spectroscopy (XPS). Optical properties studied using UV-Vis diffuse reflectance spectroscopy confirmed that the absorbance of ZnO increased in the visible-light region with the incorporation of CNTs. In this study, degradation of Rhodamine B (RhB) as a dye pollutant was investigated in the presence of pristine ZnO nanoparticles and ZnO/CNTs composites using photocatalysis and sonocatalysis systems separately and simultaneously. The adsorption was found to be an essential factor in the degradation of the dye. The linear transform of the Langmuir isotherm curve was further used to determine the characteristic parameters for ZnO and ZCC-5 samples which were: maximum absorbable dye quantity and adsorption equilibrium constant. The natural sunlight and low power ultrasound were used as an irradiation source. The experimental kinetic data followed the pseudo-first order model in photocatalytic, sonocatalytic and sonophotocatalytic processes but the rate constant of sonophotocatalysis is higher than the sum of it at photocatalysis and sonocatalysis process. The sonophotocatalysis was always faster than the respective individual processes due to the more formation of reactive radicals as well as the increase of the active surface area of ZnO/CNTs photocatalyst. Chemical oxygen demand (COD) of textile wastewater was measured at regular intervals to evaluate the mineralization of wastewater.
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Affiliation(s)
- M Ahmad
- Department of Physics, Bahauddin Zakariya University, Multan 60800, Pakistan; State Key Laboratory of Silicon Materials, Department of Materials Science & Engineering, Zhejiang University, Hangzhou 310027, China.
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20
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21
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Wang RC, Yu CW. Phenol degradation under visible light irradiation in the continuous system of photocatalysis and sonolysis. ULTRASONICS SONOCHEMISTRY 2013; 20:553-564. [PMID: 22929926 DOI: 10.1016/j.ultsonch.2012.07.014] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2012] [Revised: 07/04/2012] [Accepted: 07/17/2012] [Indexed: 06/01/2023]
Abstract
The combination of photocatalysis under visible light irradiation and sonolysis in the continuous system has been used to degrade an aqueous solution of phenol. ZnFe(2)O(4)/TiO(2)-GAC was employed as the photocatalysts which were obtained by sol-gel process and characterized by spectroscopic X-ray diffraction (XRD), scanning electron microscopy with energy dispersive X-ray microanalyses (SEM-EDX) and Brunauer-Emmett-Teller sorptometer (BET). It was observed that the rates of phenol degradation were affected by the initial pH value of phenol solution, salt addition, gas supplying and the recycling times of the recovered photocatalyst. The kinetic law for the phenol degradation can be apparently expressed as the first-order with respect to the concentration of phenol. Degradation of phenol solution in the continuous system, i.e., photocatalysis and sonolysis has synergistic effect in comparison with the photocatalytic reaction and sonolysis, respectively.
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Affiliation(s)
- Rong-Chi Wang
- Department of Chemical Engineering, Tatung University, Taipei 10452, Taiwan.
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22
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Ebrahimi R, Tarhandeh G, Rafiey S, Narjabadi M, Khani H. Photo-Assisted Sondegradation of Hydrogels in the Presence of TiO 2Nanoparticles. JOURNAL OF THE KOREAN CHEMICAL SOCIETY-DAEHAN HWAHAK HOE JEE 2012. [DOI: 10.5012/jkcs.2012.56.1.092] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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23
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Shriwas AK, Gogate PR. Ultrasonic degradation of methyl Parathion in aqueous solutions: Intensification using additives and scale up aspects. Sep Purif Technol 2011. [DOI: 10.1016/j.seppur.2011.02.034] [Citation(s) in RCA: 58] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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24
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Martins RC, Silva AMT, Castro-Silva S, Garção-Nunes P, Quinta-Ferreira RM. Adopting strategies to improve the efficiency of ozonation in the real-scale treatment of olive oil mill wastewaters. ENVIRONMENTAL TECHNOLOGY 2010; 31:1459-1469. [PMID: 21214005 DOI: 10.1080/09593330.2010.490858] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/30/2023]
Abstract
In this experimental work the ozone action on the depuration of olive oil mill wastewater is studied for different operational conditions based on an actual industrial treatment plant. It was verified that the application of a Mn-Ce-O catalyst prepared at the laboratory, with a Mn/Ce molar proportion of 70/30, enhances the depuration efficiency and the effluent biodegradability. Ozonation operation at the natural pH of the effluent is recommended. Moreover, the integration of the Fenton process as a pretreatment improves the final chemical oxygen demand removal and enables a totally biodegradable effluent to be obtained, as confirmed by respirometric techniques.
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Affiliation(s)
- Rui C Martins
- GERSE, Group on Environment, Reaction and Separation Engineering, Department of Chemical Engineering, Faculty of Sciences and Technology, University of Coimbra, Pólo II--Rua Silvio Lima, 3030-790 Coimbra, Portugal
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25
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Khokhawala IM, Gogate PR. Degradation of phenol using a combination of ultrasonic and UV irradiations at pilot scale operation. ULTRASONICS SONOCHEMISTRY 2010; 17:833-838. [PMID: 20308000 DOI: 10.1016/j.ultsonch.2010.02.012] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/01/2009] [Revised: 02/22/2010] [Accepted: 02/24/2010] [Indexed: 05/29/2023]
Abstract
In the present work, combination of ultraviolet (UV) irradiations (using 8 W UV tube) with ultrasonic (US) irradiations (rated power 1 kW and frequency of 25 kHz) has been investigated for the degradation of phenol at pilot scale of operation. Different modes of operation viz. UV alone, US alone, UV/US, UV/TiO(2) (photocatalysis), UV/H(2)O(2), UV/NaCl, UV/US/TiO(2) (sonophotocatalysis) and H(2)O(2) assisted sonophotocatalysis have been investigated with an objective of maximizing the extent of phenol degradation. Effect of presence of hydrogen peroxide and sodium chloride at a concentration of 10 g/l and TiO(2) over a range of 0.5-2.5 g/l has been investigated. It has been observed that 2.0 g/l of TiO(2) is the optimum concentration, beyond which a decrease in the extent of degradation is observed. Maximum extent of degradation of phenol was 37.75% for H(2)O(2) assisted photosonocatalysis at pH of 2. The present work is first of its kind to report the use of combined ultrasonic and UV irradiations at pilot scale operation and obtained results should induce some degree of certainty in proposed industrial applications of sonochemical reactors for wastewater treatment.
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Affiliation(s)
- Ismail M Khokhawala
- Chemical Engineering Department, Institute of Chemical Technology, Matunga, Mumbai 400019, India
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26
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Joseph CG, Li Puma G, Bono A, Krishnaiah D. Sonophotocatalysis in advanced oxidation process: a short review. ULTRASONICS SONOCHEMISTRY 2009; 16:583-9. [PMID: 19282232 DOI: 10.1016/j.ultsonch.2009.02.002] [Citation(s) in RCA: 159] [Impact Index Per Article: 10.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/15/2008] [Revised: 11/16/2008] [Accepted: 02/02/2009] [Indexed: 05/15/2023]
Abstract
Sonophotocatalysis involves the use of a combination of ultrasonic sound waves, ultraviolet radiation and a semiconductor photocatalyst to enhance a chemical reaction by the formation of free radicals in aqueous systems. Researchers have used sonophotocatalysis in a variety of investigations i.e. from water decontamination to direct pollutant degradation. This degradation process provides an excellent opportunity to reduce reaction time and the amount of reagents used without the need for extreme physical conditions. Given its advantages, the sonophotocatalysis process has a futuristic application from an engineering and fundamental aspect in commercial applications. A detailed search of published reports was done and analyzed in this paper with respect to sonication, photocatalysis and advanced oxidation processes.
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Affiliation(s)
- Collin G Joseph
- School of Science and Technology, Universiti Malaysia Sabah, 88999 Kota Kinabalu, Sabah, Malaysia.
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27
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Determination of key operating conditions for the photocatalytic treatment of olive mill wastewaters. Catal Today 2009. [DOI: 10.1016/j.cattod.2009.01.037] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
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28
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Luste S, Luostarinen S, Sillanpää M. Effect of pre-treatments on hydrolysis and methane production potentials of by-products from meat-processing industry. JOURNAL OF HAZARDOUS MATERIALS 2009; 164:247-255. [PMID: 18805637 DOI: 10.1016/j.jhazmat.2008.08.002] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/14/2008] [Revised: 07/02/2008] [Accepted: 08/02/2008] [Indexed: 05/26/2023]
Abstract
In this study, the effect of five pre-treatments (thermal, ultrasound, acid, base and bacterial product) on hydrolysis and methane production potentials of four by-products from meat-processing industry was studied. The bacterial product Liquid Certizyme 5 increased soluble chemical oxygen demand (CODsol) of digestive tract content and drumsieve waste the most as compared to untreated material (62 and 96%, respectively), while ultrasound was the most effective to increase CODsol with dissolved air flotation (DAF) sludge (88%) and grease trap sludge (188%). In batch experiments, thermal treatment increased methane production potential of drumsieve waste, acid of grease trap sludge and all pre-treatments of DAF sludge. However, with all other pre-treatments, methane production potential was decreased compared to untreated materials, apparently due to inhibition by hydrolysis products and/or possible re-crystallization of some compounds. Methane production potentials from the untreated materials were as follows: digestive tract content 400+/-50m(3)CH(4)/t volatile solids (VS)(added), drumsieve waste 230+/-20m(3)CH(4)/tVS(added), DAF sludge 340+/-17m(3)CH(4)/tVS(added) and grease trap sludge 900+/-44m(3)CH(4)/tVS(added).
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Affiliation(s)
- Sami Luste
- University of Kuopio, Laboratory of Applied Environmental Chemistry, Patteristonkatu 1, FI-50100 Mikkeli, Finland.
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29
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Segura Y, Molina R, Martínez F, Melero JA. Integrated heterogeneous sono-photo Fenton processes for the degradation of phenolic aqueous solutions. ULTRASONICS SONOCHEMISTRY 2009; 16:417-424. [PMID: 19028130 DOI: 10.1016/j.ultsonch.2008.10.004] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/13/2008] [Revised: 10/06/2008] [Accepted: 10/08/2008] [Indexed: 05/27/2023]
Abstract
The removal of organic compounds from aqueous solutions has been tackled by a novel integrated heterogeneous system. The efficacy of the different systems has been assessed using Fenton-like processes (H2O2/Fe2O3-SBA-15) and phenol as model pollutant. Sono- and photo-Fenton processes separately applied as well as combined systems were studied in order to evaluate of possible beneficial effects on the use of coupled systems. The sequential system evidences an enhancement in terms of phenol and TOC conversions compared to the ultrasound or UV-light irradiation processes. A total phenol degradation and ca. 90% TOC reduction are achieved by sequentially ultrasound followed by UV-visible light irradiation. These effects are ascribed cavitation effect of ultrasound producing a reduction of particle size that provides a higher amount of available active sites due to an increased surface area for the subsequent photo-Fenton system. These encouraging results open new paths for the existing oxidation technologies for potable water and wastewater treatment.
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Affiliation(s)
- Y Segura
- Department of Chemical and Environmental Technology, ESCET, Rey Juan Carlos University, 28933 Móstoles, Madrid, Spain
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