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Artificial Neural Networks for Modelling the Degradation of Emerging Contaminants Process. Top Catal 2022. [DOI: 10.1007/s11244-022-01674-7] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/17/2022]
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2
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Removal of Reactive Red 120 using immobilized TiO2 in the presence of UV light. REACTION KINETICS MECHANISMS AND CATALYSIS 2022. [DOI: 10.1007/s11144-022-02230-w] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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3
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Saqib NU, Adnan R, Shah I, Arshad M, Inam M. Activated carbon, zeolite, and ceramics immobilized TiO 2 photocatalysts for the enhanced sequential uptake of dyes and Cd 2+ ions. J DISPER SCI TECHNOL 2022. [DOI: 10.1080/01932691.2022.2070497] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Affiliation(s)
- Najm Us Saqib
- Department of Chemistry, University of Buner, Khyber Pakhtunkhwa, Pakistan
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Rohana Adnan
- School of Chemical Sciences, Universiti Sains Malaysia, Penang, Malaysia
| | - Irfan Shah
- Department of Chemistry, University of Education-Lahore, Lahore, Pakistan
| | - Muhammad Arshad
- Department of Electronics, University of Buner, Khyber Pakhtunkhwa, Pakistan
| | - Muhammad Inam
- Department of Chemistry, Zhejiang University, Hangzhou, P. R. China
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Aysan Rahimpour-Javid, Mohammad A. Behnajady. Artificial Neural Network Modelling of Photocatalytic Degradation of Diclofenac as a Pharmaceutical Contaminant. J WATER CHEM TECHNO+ 2020. [DOI: 10.3103/s1063455x20040128] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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Zulfiqar M, Chowdhury S, Omar AA, Siyal AA, Sufian S. Response surface methodology and artificial neural network for remediation of acid orange 7 using TiO 2-P25: optimization and modeling approach. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2020; 27:34018-34036. [PMID: 32557068 DOI: 10.1007/s11356-020-09674-4] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Accepted: 06/09/2020] [Indexed: 06/11/2023]
Abstract
The primary responsibility for continuously discharging toxic organic pollutants into water bodies and open environments is the increase in industrial and agricultural activities. Developing economical and suitable methods to continuously remove organic pollutants from wastewater is highly essential. The aim of the present research was to apply response surface methodology (RSM) and artificial neural networks (ANNs) for optimization and modeling of photocatalytic degradation of acid orange 7 (AO7) by commercial TiO2-P25 nanoparticles (TNPs). Dose of TNPs, pH, and AO7 concentration were selected as investigated parameters. RSM results reveal the reflective rate of AO7 removal of ~ 94.974% was obtained at pH 7.599, TNP dose of 0.748 g/L, and AO7 concentration of 28.483 mg/L. The resulting quadratic model is satisfactory with the highest coefficient of determination (R2) between the predicted and experimental data (R2 = 0.98 and adjusted R2 = 0.954). On the other hand, ANNs were successfully employed for modeling of AO7 degradation process. The proposed ANN model was absolutely fitted with experimental results producing the highest R2. Furthermore, root mean square error (RMSE), mean average deviation (MAD), absolute average relative error (AARE), and mean square error (MSE) were examined more to compare the predictive capabilities of ANN and RSM models. The experimental data was well fitted into pseudo-first-order and pseudo-second-order kinetics with more accuracy. Thermodynamic parameters, namely enthalpy, entropy, Gibbs' free energy, and activation energy, were also evaluated to suggest the nature of the degradation process. The increase of temperature was analyzed to be more suitable for the fast removal of AO7 over TNPs. Graphical abstract.
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Affiliation(s)
- Muhammad Zulfiqar
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Sri Iskandar, Perak, Malaysia.
| | - Sujan Chowdhury
- Chemical Engineering Department, Jashore University of Science and Technology, Jashore, 7408, Bangladesh
| | - Abdul Aziz Omar
- Department of Computing and Information Systems, Sunway University, 47500, Petaling Jaya, Selangor, Malaysia
| | - Ahmer Ali Siyal
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Sri Iskandar, Perak, Malaysia
| | - Suriati Sufian
- Department of Chemical Engineering, Universiti Teknologi PETRONAS, 32610, Bandar Sri Iskandar, Perak, Malaysia.
- Centre of Innovative Nanostructures & Nanodevices (COINN), Universiti Teknologi PETRONAS, 32610, Bandar Seri Iskandar, Perak, Malaysia.
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6
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Saqib NU, Khan A, Alam I, Rahim M. Glass beads immobilized doped TiO2 NPs with enhanced adsorption efficiency for arsenic(III) from aqueous solution. SN APPLIED SCIENCES 2020. [DOI: 10.1007/s42452-020-2207-4] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022] Open
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7
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Masood H, Toe CY, Teoh WY, Sethu V, Amal R. Machine Learning for Accelerated Discovery of Solar Photocatalysts. ACS Catal 2019. [DOI: 10.1021/acscatal.9b02531] [Citation(s) in RCA: 64] [Impact Index Per Article: 12.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Affiliation(s)
- Hassan Masood
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Cui Ying Toe
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Wey Yang Teoh
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Vidhyasaharan Sethu
- School of Electrical Engineering and Telecommunications, The University of New South Wales, Sydney, New South Wales 2052, Australia
| | - Rose Amal
- Particles and Catalysis Research Group, School of Chemical Engineering, The University of New South Wales, Sydney, New South Wales 2052, Australia
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Alkali modified oak waste residues as a cost-effective adsorbent for enhanced removal of cadmium from water: Isotherm, kinetic, thermodynamic and artificial neural network modeling. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2019.05.034] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
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9
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Mohsenzadeh M, Mirbagheri SA, Sabbaghi S. Degradation of 1,2-dichloroethane by photocatalysis using immobilized PAni-TiO 2 nano-photocatalyst. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2019; 26:31328-31343. [PMID: 31471851 DOI: 10.1007/s11356-019-06240-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/14/2019] [Accepted: 08/16/2019] [Indexed: 06/10/2023]
Abstract
1,2-Dichloroethane is one of the most hazardous environmental pollutants in wastewaters. It is mainly used to produce vinyl chloride monomer, the major precursor for PVC production. It is determined to be a probable human carcinogen and has been listed as a priority pollutant by the United States Environmental Protection Agency. Due to high chemical stability and low biodegradability of 1,2-dichloroethane, heterogeneous photocatalysis was used for degradation of this chlorinated hydrocarbon. PAni-TiO2 nanocomposite was synthesized by in situ deposition oxidative polymerization method and immobilized on glass beads by a modified dip coating and heat attachment method. The characteristics of synthesized PAni-TiO2 nanoparticles were confirmed using the results of morphology tests including Fourier-transform infrared spectra, X-ray diffraction patterns, particle size analysis, UV-Visible spectrophotometer, scanning electron microscope, and energy-dispersive X-ray spectroscopy. The performance of photocatalytic degradation of 1,2-dichloroethane using synthesized PAni-TiO2 nanocomposite in a designed and constructed pilot scale packed bed recirculating photocatalytic reactor under xenon light irradiation was investigated. The response surface methodology based on the central composite design was used to evaluate and optimize the effect of 1,2-dichloroethane concentration, residence time, pH, and coating mass as independent variables on the photocatalytic degradation of 1,2-dichloroethane as the response function. Results showed that actual and predicted results were well fitted with R2 of 0.9870, adjusted R2 of 0.9718, and predicted R2 of 0.9422. The optimum conditions for 1,2-dichloroethane photocatalytic degradation were the 1,2-dichloroethane concentration of 250 mg/L, the residence time of 240 min, pH of 5, and coating mass of 0.5 mg/cm2, which resulted in 88.84% photocatalytic degradation. Kinetic of the photocatalytic degradation at optimal condition follows the Langmuir-Hinshelwood first-order reaction with k = 0.0095 min-1 with R2 = 0.9455. Complete photocatalytic degradation of 1,2-DCE was achieved after 360 min.
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Affiliation(s)
- Mahdi Mohsenzadeh
- Department of Environmental Engineering, Faculty of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran
| | - Seyed Ahmad Mirbagheri
- Department of Environmental Engineering, Faculty of Civil Engineering, K.N. Toosi University of Technology, Tehran, Iran
| | - Samad Sabbaghi
- Nanochemical Engineering Department, Faculty of Advanced Technologies, Shiraz University, Shiraz, Iran.
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10
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A comparative removal of two dyes from aqueous solution using modified oak waste residues: Process optimization using response surface methodology. J IND ENG CHEM 2019. [DOI: 10.1016/j.jiec.2018.12.011] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022]
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11
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Rathod M, Moradeeya PG, Haldar S, Basha S. Nanocellulose/TiO 2 composites: preparation, characterization and application in the photocatalytic degradation of a potential endocrine disruptor, mefenamic acid, in aqueous media. Photochem Photobiol Sci 2018; 17:1301-1309. [PMID: 30090894 DOI: 10.1039/c8pp00156a] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Nanocellulose (NC)-supported TiO2 nanoparticles, termed NCTs, were prepared by an ultrasonic impregnation method. The as-synthesized NCTs were thoroughly characterized and studied for the photodegradation of mefenamic acid (MEF), an anthranilic acid derivative drug. The adsorption potential of NCTs increased with TiO2 loading and 10 wt% TiO2 NCT showed the highest sorption potential. Adsorption kinetics of MEF onto NC and NCTs indicated that the equilibrium was reached within 50 min. A pseudo-second-order model clearly represented the experimental kinetic data and demonstrated that the MEF sorption was mainly chemisorption. Equilibrium sorption analysis indicated that the adsorption followed the Langmuir model with a monolayer sorption capacity of 22.43 mg g-1 for 10 wt% TiO2 NCT. The photocatalytic degradation rates of NCTs were identical with respect to their adsorption capacities, and the apparent rate constant (kapp) values indicated that the amount of TiO2 in NCTs played a vital role in the degradation of MEF. Furthermore, 10 wt% TiO2 NCT showed excellent catalytic activity and reusability even after five cycles of photodegradation.
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Affiliation(s)
- Manali Rathod
- Academy of Scientific and Innovative Research (AcSIR), CSIR-CSMCRI, Bhavnagar 364002, Gujarat, India
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12
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Meng X, Zhang Z. Experimental analysis of a photoreactor packed with Pd-BiVO4
-Coated glass beads. AIChE J 2018. [DOI: 10.1002/aic.16388] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Affiliation(s)
- Xiangchao Meng
- Dept. of Chemical and Biological Engineering; University of Ottawa; Ottawa ON K1N 6N5, Canada
| | - Zisheng Zhang
- School of Chemical Engineering and Technology; Hebei University of Technology; Tianjin 300131, China
- Dept. of Chemical and Biological Engineering; University of Ottawa; Ottawa ON K1N 6N5, Canada
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13
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Preparation of Congo red functionalized Fe3O4@SiO2 nanoparticle and its application for the removal of methylene blue. Colloids Surf A Physicochem Eng Asp 2018. [DOI: 10.1016/j.colsurfa.2018.04.033] [Citation(s) in RCA: 46] [Impact Index Per Article: 7.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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Cunha DL, Kuznetsov A, Achete CA, Machado AEDH, Marques M. Immobilized TiO 2 on glass spheres applied to heterogeneous photocatalysis: photoactivity, leaching and regeneration process. PeerJ 2018. [PMID: 29527416 PMCID: PMC5844248 DOI: 10.7717/peerj.4464] [Citation(s) in RCA: 56] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
Heterogeneous photocatalysis using titanium dioxide as catalyst is an attractive advanced oxidation process due to its high chemical stability, good performance and low cost. When immobilized in a supporting material, additional benefits are achieved in the treatment. The purpose of this study was to develop a simple protocol for impregnation of TiO2-P25 on borosilicate glass spheres and evaluate its efficiency in the photocatalytic degradation using an oxidizable substrate (methylene blue), in a Compound Parabolic Concentrator (CPC) reactor. The assays were conducted at lab-scale using radiation, which simulated the solar spectrum. TiO2 leaching from the glass and the catalyst regeneration were both demonstrated. A very low leaching ratio (0.03%) was observed after 24 h of treatment, suggesting that deposition of TiO2 resulted in good adhesion and stability of the photocatalyst on the surface of borosilicate. This deposition was successfully achieved after calcination of the photocatalyst at 400 °C (TiO2-400 °C). The TiO2 film was immobilized on glass spheres and the powder was characterized by scanning electron microscopy (SEM), X-ray diffraction and BET. This characterization suggested that thermal treatment did not introduce substantial changes in the measured microstructural characteristics of the photocatalyst. The immobilized photocatalyst degraded more than 96% of the MB in up to 90 min of reaction. The photocatalytic activity decreased after four photocatalytic cycles, but it was recovered by the removal of contaminants adsorbed on the active sites after washing in water under UV-Vis irradiation. Based on these results, the TiO2-400 °C coated on glass spheres is potentially a very attractive option for removal of persistent contaminants present in the environment.
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Affiliation(s)
- Deivisson Lopes Cunha
- Department of Sanitary and Environmental Engineering, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
| | - Alexei Kuznetsov
- Divisão de Metrologia de Materiais-DIMAT, Instituto Nacional de Metrologia, Qualidade e Tecnologia-INMETRO, Duque de Caxias, Rio de Janeiro, Brazil
| | - Carlos Alberto Achete
- Divisão de Metrologia de Materiais-DIMAT, Instituto Nacional de Metrologia, Qualidade e Tecnologia-INMETRO, Duque de Caxias, Rio de Janeiro, Brazil
| | - Antonio Eduardo da Hora Machado
- Laboratory of Photochemistry and Materials Science, Institute of Chemistry, Universidade Federal de Uberlândia, Uberlândia, Minas Gerais, Brazil
| | - Marcia Marques
- Department of Sanitary and Environmental Engineering, Universidade do Estado do Rio de Janeiro, Rio de Janeiro, Brazil
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15
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Hussein A, Scholz M. Treatment of artificial wastewater containing two azo textile dyes by vertical-flow constructed wetlands. ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH INTERNATIONAL 2018; 25:6870-6889. [PMID: 29270896 PMCID: PMC5846842 DOI: 10.1007/s11356-017-0992-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2017] [Accepted: 12/10/2017] [Indexed: 05/29/2023]
Abstract
The release of untreated dye textile wastewater into receiving streams is unacceptable not only for aesthetic reasons and its negative impacts on aquatic life but also because numerous dyes are toxic and carcinogenic to humans. Strategies, as of now, used for treating textile wastewaters have technical and economical restrictions. The greater part of the physico-chemical methods, which are used to treat this kind of wastewater, are costly, produce large amounts of sludge and are wasteful concerning some soluble dyes. In contrast, biological treatments such as constructed wetlands are cheaper than the traditional methods, environmental friendly and do not produce large amounts of sludge. Synthetic wastewater containing Acid Blue 113 (AB113) and Basic Red 46 (BR46) has been added to laboratory-scale vertical-flow construction wetland systems, which have been planted with Phragmites australis (Cav.) Trin. ex Steud. (common reed). The concentrations 7 and 208 mg/l were applied for each dye at the hydraulic contact times of 48 and 96 h. Concerning the low concentrations of BR46 and AB113, the unplanted wetlands are associated with significant (ρ < 0.05) reduction performances, if compared with planted wetlands concerning the removal of dyes. For the high concentrations of AB113, BR46 and a mixture of both of them, wetlands with long contact times were significantly (ρ < 0.05) better than wetlands that had short contact times in terms of dye, colour and chemical oxygen demand reductions. Regarding nitrate nitrogen (NO3-N), the reduction percentage rates of AB113, BR46 and a mixture dye of both of them were between 85 and 100%. For low and high inflow dye concentrations, best removals were generally recorded for spring and summer, respectively.
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Affiliation(s)
- Amjad Hussein
- Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Peel Park Campus, Salford, Greater Manchester, M5 4WT, UK
- Civil Engineering Department, Engineering College, Al-Muthanna University, Al-Muthanna, Samawah, Iraq
| | - Miklas Scholz
- Civil Engineering Research Group, School of Computing, Science and Engineering, The University of Salford, Newton Building, Peel Park Campus, Salford, Greater Manchester, M5 4WT, UK.
- Division of Water Resources Engineering, Department of Building and Environmental Technology, Faculty of Engineering, Lund University, P.O. Box 118, 221 00, Lund, Sweden.
- Department of Civil Engineering Science, School of Civil Engineering and the Built Environment, University of Johannesburg, Kingsway Campus, Auckland Park, P.O. Box 524, Johannesburg, 2006, South Africa.
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16
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ICA and ANN Modeling for Photocatalytic Removal of Pollution in Wastewater. MATHEMATICAL AND COMPUTATIONAL APPLICATIONS 2017. [DOI: 10.3390/mca22030038] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
This paper discusses the elimination of Colour Index Acid Yellow 23 (C.I. AY23) using the ultraviolet (UV)/Ag-TiO2 process. To anticipate the photocatalytic elimination of AY23 with the existence of Ag-TiO2 nanoparticles processed under desired circumstances, two computational techniques, namely artificial neural network (ANN) and imperialist competitive algorithm (ICA) modeling are developed. A sum of 100 datasets are used to establish the models, wherein the introductory concentration of dye, UV light intensity, initial dosage of nano Ag-TiO2, and irradiation time are the four parameters expressed in the form of input variables. Additionally, the elimination of AY23 is considered in the form of the output variable. Out of the 100 datasets, 80 are utilized in order to train the models. The remaining 20 that were not included in the training are used in order to test the models. The comparison of the predicted outcomes extracted from the suggested models and the data obtained from the experimental analysis validates that the performance of the ANN scheme is comparatively sophisticated when compared with the ICA scheme.
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Chen J, Feng J, Yan W. Influence of metal oxides on the adsorption characteristics of PPy/metal oxides for Methylene Blue. J Colloid Interface Sci 2016; 475:26-35. [DOI: 10.1016/j.jcis.2016.04.017] [Citation(s) in RCA: 81] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/23/2016] [Revised: 04/09/2016] [Accepted: 04/12/2016] [Indexed: 10/21/2022]
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Patchaiyappan A, Saran S, Devipriya SP. Recovery and reuse of TiO2 photocatalyst from aqueous suspension using plant based coagulant - A green approach. KOREAN J CHEM ENG 2016. [DOI: 10.1007/s11814-016-0059-9] [Citation(s) in RCA: 23] [Impact Index Per Article: 2.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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19
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Photocatalytic degradation of ciprofloxacin by synthesized TiO2 nanoparticles on montmorillonite: Effect of operation parameters and artificial neural network modeling. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2015.08.020] [Citation(s) in RCA: 132] [Impact Index Per Article: 14.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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20
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Khataee A, Saadi S, Safarpour M, Joo SW. Sonocatalytic performance of Er-doped ZnO for degradation of a textile dye. ULTRASONICS SONOCHEMISTRY 2015; 27:379-388. [PMID: 26186857 DOI: 10.1016/j.ultsonch.2015.06.010] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/22/2015] [Revised: 06/14/2015] [Accepted: 06/15/2015] [Indexed: 06/04/2023]
Abstract
Pure and erbium (Er)-doped ZnO samples were synthesized through a sonochemical method and characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-Vis spectroscopy, and X-ray photoelectron spectroscopy (XPS) analysis. The synthesized samples were used as a catalyst for the sonocatalytic decolorization of Reactive Orange 29 (RO29) as a model organic pollutant. The decolorization efficiency was 63%, 68%, 88%, and 75% for undoped, 2%, 4%, and 6% Er-doped ZnO, respectively. The effect of different experimental parameters including catalyst content, dye concentration and ultrasound power was investigated on the sonocatalytic decolorization of RO29. Among several radical scavengers (i.e. chloride, carbonate and sulfate anions and t-butanol), the chloride anion showed the most inhibitive effect on the sonocatalysis performance. Improvement of the sonocatalytic process by K2S2O8 and H2O2 enhancers was also studied. The reusability of the synthesized sonocatalyst was evaluated in several consecutive runs, and a decline of only 4% was observed in the process performance after five runs. The intermediates produced during the degradation of RO29 were identified by GC-MS analysis.
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Affiliation(s)
- Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran.
| | - Shabnam Saadi
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
| | - Mahdie Safarpour
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, 51666-16471 Tabriz, Iran
| | - Sang Woo Joo
- School of Mechanical Engineering, Yeungnam University, 712-749 Gyeongsan, South Korea.
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Abdollahi Y, Said SBM, Sairi NA, Sabri MFBM, Zakaria A, Abouzari-lotf E, Dorraj M, Aziz RS. Enhancement of electronic protection to reduce e-waste. J IND ENG CHEM 2015. [DOI: 10.1016/j.jiec.2015.04.021] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Sheidaei B, Behnajady MA. Mathematical Kinetic Modelling and Representing Design Equation for a Packed Photoreactor with Immobilised TiO2-P25 Nanoparticles on Glass Beads in the Removal of C.I. Acid Orange 7. CHEMICAL AND PROCESS ENGINEERING 2015. [DOI: 10.1515/cpe-2015-0010] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
Abstract
In this work, a design equation was presented for a batch-recirculated photoreactor composed of a packed bed reactor (PBR) with immobilised TiO2-P25 nanoparticle thin films on glass beads, and a continuous-flow stirred tank (CFST). The photoreactor was studied in order to remove C.I. Acid Orange 7 (AO7), a monoazo anionic dye from textile industry, by means of UV/TiO2 process. The effect of different operational parameters such as the initial concentration of contaminant, the volume of solution in CFST, the volumetric flow rate of liquid, and the power of light source in the removal efficiency were examined. A rate equation for the removal of AO7 is obtained by mathematical kinetic modelling. The results of reaction kinetic analysis indicate the conformity of removal kinetics with Langmuir-Hinshelwood model (kL-H = 0.74 mg L-1 min-1, Kads = 0.081 mg-1 L). The represented design equation obtained from mathematical kinetic modelling can properly predict the removal rate constant of the contaminant under different operational conditions (R2 = 0.963). Thus the calculated and experimental results are in good agreement with each other.
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Anilkumar MR, Nagaswarupa HP, Nagabhushana H, Sharma SC, Vidya YS, Anantharaju KS, Prashantha SC, Shivakuamra C, Gurushantha K. Bio-inspired route for the synthesis of spherical shaped MgO:Fe(3+) nanoparticles: Structural, photoluminescence and photocatalytic investigation. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 149:703-713. [PMID: 25988816 DOI: 10.1016/j.saa.2015.05.003] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/28/2014] [Revised: 04/20/2015] [Accepted: 05/04/2015] [Indexed: 06/04/2023]
Abstract
MgO:Fe(3+) (0.1-5 mol%) nanoparticles (NPs) were synthesized via eco-friendly, inexpensive and simple low temperature solution combustion route using Aloe vera gel as fuel. The final products were characterized by SEM, TEM and HRTEM. PXRD data and Rietveld analysis revealed the formation of cubic system. The influence of Fe(3+) ion concentration on the structure morphology, UV absorption, PL emission and photocatalytic activity of MgO:Fe(3+) NPs were investigated. The yellow emission with CIE chromaticity coordinates (0.44, 0.52) and average correlated color temperature value was found to be 3540 K which corresponds to warm light of NPs. The control of Fe(3+) on MgO matrix influences the photocatalytic decolorization of methylene blue (MB) under UV light. The enhanced photocatalytic activity of MgO:Fe(3+) (4 mol%) was attributed to dopant concentration, effective crystallite size, textural properties, decreased band gap and capability for reducing the electron-hole pair recombination. Further, the trends of inhibitory effect in the presence of different radical scavengers were explored. These findings open up new avenues for the exploration of Fe-doped MgO in eco-friendly water applications and in the process of display devices.
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Affiliation(s)
- M R Anilkumar
- Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India
| | - H P Nagaswarupa
- Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India.
| | - H Nagabhushana
- Prof. C.N.R. Rao Centre for Advanced Materials, Tumkur University, Tumkur 572 103, India
| | - S C Sharma
- Dayananda Sagar University, Shavige Malleshwara Hills, Kumaraswamy Layout, Bangalore 560078, Karnataka, India
| | - Y S Vidya
- Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India.
| | - K S Anantharaju
- Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India.
| | - S C Prashantha
- Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India
| | - C Shivakuamra
- Solid State and Structural Chemistry Unit, Indian Institute of Science, Bangalore 560 012, India
| | - K Gurushantha
- Department of Science, Research Center, East West Institute of Technology, Bangalore 560 091, India
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24
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Aghaeinejad-Meybodi A, Ebadi A, Shafiei S, Khataee A, Rostampour M. Degradation of antidepressant drug fluoxetine in aqueous media by ozone/H2O2 system: process optimization using central composite design. ENVIRONMENTAL TECHNOLOGY 2015; 36:1477-1488. [PMID: 25491028 DOI: 10.1080/09593330.2014.994041] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/04/2023]
Abstract
The main objective of this work is the modelling and optimization of antidepressant drug fluoxetine degradation in aqueous solution by ozone/H2O2 process using central composite design. The operational parameters were ozone concentration, initial hydrogen peroxide concentration, reaction time and initial fluoxetine concentration. A good agreement between the predicted values of fluoxetine removal and experimental results were observed (R2=0.976 and Adj-R2=0.955). Pareto analysis indicated that all selected factors and some interactions were effective on the removal efficiency. It was found that the reaction time is the most effective parameter in the ozone/H2O2 process. The maximum removal efficiency (86.14%) was achieved at ozone concentration of 30 mg L(-1), initial H2O2 concentration of 0.02 mM, reaction time of 20 min and initial fluoxetine concentration of 50 mg L(-1) as the optimum conditions.
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Affiliation(s)
- Abbas Aghaeinejad-Meybodi
- a Department of Chemical Engineering , Environmental Engineering Research Centre, Sahand University of Technology , Tabriz , Iran
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25
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Prasanna kumar JB, Ramgopal G, Vidya YS, Anantharaju KS, Daruka Prasad B, Sharma SC, Prashantha SC, Premkumar HB, Nagabhushana H. Bio-inspired synthesis of Y2O3: Eu(3+) red nanophosphor for eco-friendly photocatalysis. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 141:149-160. [PMID: 25668696 DOI: 10.1016/j.saa.2015.01.055] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/14/2014] [Revised: 12/31/2014] [Accepted: 01/22/2015] [Indexed: 06/04/2023]
Abstract
We report the synthesis of Y2O3: Eu(3+) (1-11 mol%) nanoparticles (NPs) with different morphologies via eco-friendly, inexpensive and simple low temperature solution combustion method using Aloe Vera gel as fuel. The formation of different morphologies of Y2O3: Eu(3+) NPs were characterized by PXRD, SEM, TEM, HRTEM, UV-Visible and PL techniques. The PXRD data and Rietveld analysis confirms the formation of single phase Y2O3 with cubic crystal structure. The influence of Eu(3+) ion concentration on the morphology, UV-Visible absorption, PL emission and photocatalytic activity of Y2O3: Eu(3+) nanostructures were investigated. Y2O3: Eu(3+) NPs exhibit intense red emission with CIE chromaticity coordinates (0.50, 0.47) and correlated color temperature values at different excitation ranges from 1868 to 2600 K. The control of Eu(3+) ion on Y2O3 matrix influences the photocatalytic decolorization of methylene blue (MB) as a model compound was evaluated under UVA light. Enhanced photocatalytic activity of conical shaped Y2O3: Eu(3+) (1 mol%) was attributed to dopant concentration, crystallite size, textural properties and capability of reducing the electron-hole pair recombination. The trend of inhibitory effect in the presence of different radical scavengers followed the order SO4(2-)>Cl(-)>C2H5OH>HCO3(-)>CO3(2-). These findings show great promise of Y2O3: Eu(3+) NPs as a red phosphor in warm white LEDs as well as eco-friendly heterogeneous photocatalysis.
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Affiliation(s)
- J B Prasanna kumar
- Department of Physics, GFGC Tumkur, Tumkur 572 102, Karnataka, India; Department of Physics, Sathyabama University, Jeppiaar Nagar, Chennai 600 119, Tamilnadu, India
| | - G Ramgopal
- Department of Physics, Maharani's Science College, Palace Road, Bangalore 560 001, Karnataka, India
| | - Y S Vidya
- Department of Physics, Lal Bahadur Shastry Government First Grade College, Bangalore 560 032, India.
| | - K S Anantharaju
- Research Center, Department of Science, East West Institute of Technology, Bangalore 560 091, India.
| | - B Daruka Prasad
- Department of Physics, B M S Institute of Technology, Yelahanka, Bangalore 560064, India
| | - S C Sharma
- Chattisgarh Swami Vivekananda Technical University, Bhilai (CG) 493441, India
| | - S C Prashantha
- Research Center, Department of Science, East West Institute of Technology, Bangalore 560 091, India
| | - H B Premkumar
- Department of Physics, Acharya Institute of Technology, Bangalore 560 090, India
| | - H Nagabhushana
- Prof. CNR Rao Centre for Advanced Materials, Tumkur University, Tumkur 572103, India.
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26
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Kıranşan M, Khataee A, Karaca S, Sheydaei M. Artificial neural network modeling of photocatalytic removal of a disperse dye using synthesized of ZnO nanoparticles on montmorillonite. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2015; 140:465-473. [PMID: 25638428 DOI: 10.1016/j.saa.2014.12.100] [Citation(s) in RCA: 31] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/30/2014] [Revised: 11/11/2014] [Accepted: 12/28/2014] [Indexed: 06/04/2023]
Abstract
In this study, the photocatalytic ability of ZnO/Montmorilonite (ZnO/MMT) nanocomposite under UV-A, UV-B and UV-C radiation was investigated. ZnO nanoparticles were synthesized on the surface of MMT and used as photocatalyst in decolorization of Disperse Red 54 (DR54) solution. Synthesized nanocomposite was characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM) techniques and nitrogen adsorption/desorption isotherms curves. The average width of synthesized ZnO particles is in the range of 30-45 nm. Effect of UV light regions, initial dye concentration, initial dosage of nanocomposite, and reusability of catalyst was studied on decolorization efficiency. The highest decolorization efficiency was achieved under UV-C radiation. A three-layered feed forward back propagation artificial neural network model was developed to predict the photocatalysis of DR54 under UV-C radiation. According to ANN model the ZnO/MMT dosage with a relative importance of 49.21% is the most influential parameter in the photocatalytic decolorization process.
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Affiliation(s)
- Murat Kıranşan
- Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey
| | - Alireza Khataee
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
| | - Semra Karaca
- Department of Chemistry, Faculty of Science, Atatürk University, 25240 Erzurum, Turkey.
| | - Mohsen Sheydaei
- Research Laboratory of Advanced Water and Wastewater Treatment Processes, Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
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27
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Ramazanpour Esfahani A, Hojati S, Azimi A, Farzadian M, Khataee A. Enhanced hexavalent chromium removal from aqueous solution using a sepiolite-stabilized zero-valent iron nanocomposite: Impact of operational parameters and artificial neural network modeling. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2014.11.011] [Citation(s) in RCA: 32] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
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28
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Modeling and optimization of antidepressant drug Fluoxetine removal in aqueous media by ozone/H2O2 process: Comparison of central composite design and artificial neural network approaches. J Taiwan Inst Chem Eng 2015. [DOI: 10.1016/j.jtice.2014.10.022] [Citation(s) in RCA: 59] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
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29
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Gurushantha K, Anantharaju K, Nagabhushana H, Sharma S, Vidya Y, Shivakumara C, Nagaswarupa H, Prashantha S, Anilkumar M. Facile green fabrication of iron-doped cubic ZrO2 nanoparticles by Phyllanthus acidus: Structural, photocatalytic and photoluminescent properties. ACTA ACUST UNITED AC 2015. [DOI: 10.1016/j.molcata.2014.10.025] [Citation(s) in RCA: 53] [Impact Index Per Article: 5.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/24/2022]
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30
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Daood GS, Basri H, Stanslas J, Fard Masoumi HR, Basri M. Predicting the optimum compositions of a parenteral nanoemulsion system loaded with azithromycin antibiotic utilizing the artificial neural network model. RSC Adv 2015. [DOI: 10.1039/c5ra14913d] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
For the purpose of brain delivery via intravenous administration, the formulation of an azithromycin-loaded nanoemulsion system was optimized utilizing the artificial neural network (ANN) as a multivariate statistical technique.
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Affiliation(s)
- Ghaidaa S. Daood
- Department of Medicine
- Faculty of Medicine and Health Sciences
- Universiti Putra Malaysia
- Serdang
- Malaysia
| | - Hamidon Basri
- Department of Medicine
- Faculty of Medicine and Health Sciences
- Universiti Putra Malaysia
- Serdang
- Malaysia
| | - Johnson Stanslas
- Department of Medicine
- Faculty of Medicine and Health Sciences
- Universiti Putra Malaysia
- Serdang
- Malaysia
| | | | - Mahiran Basri
- Department of Chemistry
- Faculty of Science
- Universiti Putra Malaysia
- Serdang
- Malaysia
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31
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Eskandarloo H, Badiei A, Behnajady MA. Study of the Effect of Additives on the Photocatalytic Degradation of a Triphenylmethane Dye in the Presence of Immobilized TiO2/NiO Nanoparticles: Artificial Neural Network Modeling. Ind Eng Chem Res 2014. [DOI: 10.1021/ie500253q] [Citation(s) in RCA: 79] [Impact Index Per Article: 7.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Affiliation(s)
- Hamed Eskandarloo
- School
of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Alireza Badiei
- School
of Chemistry, College of Science, University of Tehran, Tehran, Iran
| | - Mohammad A. Behnajady
- Department
of Chemistry, College of Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran
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32
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Khataee A, Darvishi Cheshmeh Soltani R, Hanifehpour Y, Safarpour M, Gholipour Ranjbar H, Joo SW. Synthesis and Characterization of Dysprosium-Doped ZnO Nanoparticles for Photocatalysis of a Textile Dye under Visible Light Irradiation. Ind Eng Chem Res 2014. [DOI: 10.1021/ie402743u] [Citation(s) in RCA: 161] [Impact Index Per Article: 16.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Alireza Khataee
- Research Laboratory of Advanced
Water and Wastewater Treatment
Processes, Department of Applied
Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 516661647, Iran
| | - Reza Darvishi Cheshmeh Soltani
- Department of Environmental Health Engineering, School of Public Health, Arak University of Medical Sciences, Arak, Iran
| | - Younes Hanifehpour
- School
of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749 South Korea
| | - Mahdie Safarpour
- Research Laboratory of Advanced
Water and Wastewater Treatment
Processes, Department of Applied
Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 516661647, Iran
| | - Habib Gholipour Ranjbar
- Research Laboratory of Advanced
Water and Wastewater Treatment
Processes, Department of Applied
Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz 516661647, Iran
| | - Sang Woo Joo
- School
of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749 South Korea
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33
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Dendrimer–titania nanocomposite: synthesis and dye-removal capacity. RESEARCH ON CHEMICAL INTERMEDIATES 2013. [DOI: 10.1007/s11164-013-1486-4] [Citation(s) in RCA: 30] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 10/26/2022]
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34
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Koutantou V, Kostadima M, Chatzisymeon E, Frontistis Z, Binas V, Venieri D, Mantzavinos D. Solar photocatalytic decomposition of estrogens over immobilized zinc oxide. Catal Today 2013. [DOI: 10.1016/j.cattod.2012.11.004] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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35
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Behnajady MA, Hajiahmadi M, Modirshahla N. Enhancement of Removal Rate of an Organic Pollutant in the Presence of Immobilized TiO2 Nanoparticles with Inorganic Anions Combination: Optimization Using Taguchi Approach. Ind Eng Chem Res 2012. [DOI: 10.1021/ie301521z] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Mohammad A. Behnajady
- Department of Chemistry, Faculty of Science, Tabriz
Branch, Islamic Azad University, Tabriz,
Iran
| | - Mahsa Hajiahmadi
- Department of Chemistry, Faculty of Science, Tabriz
Branch, Islamic Azad University, Tabriz,
Iran
| | - Nasser Modirshahla
- Department of Chemistry, Faculty of Science, Tabriz
Branch, Islamic Azad University, Tabriz,
Iran
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36
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Photocatalytic (UV-A/TiO2) degradation of 17α-ethynylestradiol in environmental matrices: Experimental studies and artificial neural network modeling. J Photochem Photobiol A Chem 2012. [DOI: 10.1016/j.jphotochem.2012.05.007] [Citation(s) in RCA: 67] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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37
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Kasiri MB, Khataee AR. Removal of organic dyes by UV/H2O2 process: modelling and optimization. ENVIRONMENTAL TECHNOLOGY 2012; 33:1417-1425. [PMID: 22856317 DOI: 10.1080/09593330.2011.630425] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
The effects of different operational parameters on the decolorization of a dye solution containing C.I. Acid Blue 92 (AB92) or C.I. Acid Black 1 (AB1) by the UV/H2O2 process were optimized using response surface methodology (RSM). The reaction time, dye and H2O2 initial concentrations and distance of the UV lamp from the solution were chosen as input variables. The removal process was performed according to a central composite design. Predicted results by the proposed models were in good agreement with experimental values (R2 = 0.942 and 0.957 for AB92 and AB1, respectively). The optimum points were located by graphical response surfaces and contour plots. The removal process of the dyes was compared and the efficiency difference justified by considering the chemical structure of the dyes. Additionally, the electrical energy consumption and the related treatment costs were estimated employing the figure-of-merit electrical energy per order (E(EO)).
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Affiliation(s)
- M B Kasiri
- Faculty of Applied Arts, Tabriz Islamic Art University, Tabriz, Iran.
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38
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Rastegar M, Shadbad KR, Khataee AR, Pourrajab R. Optimization of photocatalytic degradation of sulphonated diazo dye C.I. Reactive Green 19 using ceramic-coated TiO2 nanoparticles. ENVIRONMENTAL TECHNOLOGY 2012; 33:995-1003. [PMID: 22720426 DOI: 10.1080/09593330.2011.604859] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Optimization of photocatalytic degradation of C.I. Reactive Green 19 (RG 19) under UV light irradiation using ceramic-coated TiO2 nanoparticles in a continuous circulation rectangular photoreactor was studied. The used catalyst was TiO2 Millennium PC-500 (crystallite mean size 8 nm) immobilized on ceramic plates. A central composite design was used for optimization of the UV/TiO2 process. Predicted values of decolorization efficiency were found to be in good agreement with experimental values (R2 = 0.97 and Adj-R2 = 0.91). Optimization results showed that maximum decolorization efficiency was achieved at the optimum conditions of: initial dye concentration 10 mg/L, UV light intensity 47.2 W/m2, flow rate 150 mL/min and reaction time 240 min. Photocatalytic mineralization of RG 19 was monitored by chemical oxygen demand (COD) decrease and changes in the UV-Vis spectrum.
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Affiliation(s)
- M Rastegar
- Water and Wastewater Company of East Azerbaijan, Tabriz, Iran
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39
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Behnajady MA, Mansoriieh N, Modirshahla N, Shokri M. Influence of operational parameters and kinetics analysis on the photocatalytic reduction of Cr(VI) by immobilized ZnO. ENVIRONMENTAL TECHNOLOGY 2012; 33:265-271. [PMID: 22519111 DOI: 10.1080/09593330.2011.569957] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
In the present work the performance of immobilized ZnO on a glass plate with the heat attachment method has been described for photoreduction of Cr(VI) to the less harmful Cr(III) at different operational parameters. The photoreduction of Cr(VI) on the surface of the immobilized ZnO catalyst was studied as a function of the pH of solution, initial Cr(VI) concentration and ultraviolet (UV) light intensity. Results indicated that the reduction rate decreases with increasing initial concentration of Cr(VI) and initial pH of solution, whereas it increases with increasing UV light intensity. The photoreduction rate of Cr(VI) on the surface of the immobilized ZnO in the presence of O2 as mobile gas is more than Ar and N2. The reduction process of Cr(VI) by immobilized ZnO also could be done under visible light irradiation. Pseudo first-order kinetics were observed for the photoreduction of Cr(VI) at different operational conditions. With non-linear regression analysis a mathematical kinetics model was developed for the pseudo first-order constant (k(ap)) as a function of operational parameters.
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Affiliation(s)
- Mohammad A Behnajady
- Department of Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, Tabriz, I. R. Iran.
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40
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Liu Y, Yu H, Lv Z, Zhan S, Yang J, Peng X, Ren Y, Wu X. Simulated-sunlight-activated photocatalysis of methylene blue using cerium-doped SiO2/TiO2 nanostructured fibers. J Environ Sci (China) 2012; 24:1867-75. [PMID: 23520858 DOI: 10.1016/s1001-0742(11)61008-5] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/21/2023]
Abstract
Cerium-doped SiO2/TiO2 nanostructured fibers were fabricated by electrospinning technology. The prepared fibers were characterized by thermogravimetric analysis (TGA), scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FT-IR). Using the fibers as catalysts, photocatalytic degradation of Methylene Blue (MB) aqueous solution was carried out under simulated sunlight. The 0.2% Ce doping proved to be the optimal concentration for the doping of TiO2/SiO2, compared to other Ce-doped molar concentrations. The 0.2% Ce-doped SiO2/TiO2 fibers exhibited higher photocatalytic activity than industrial Degussa P25 and the samples doped with only Ce or SiO2. The reasons for improving the photocatalytic activity were also discussed. Several operational parameters were studied, which showed that the photocatalytic efficiency of MB was influenced by parameters such as the initial dye concentration, the initial pH, inorganic anions, and so on. In addition, the influences of an electron acceptor and a radical scavenger suggested that OH was the dominant photooxidant during the photocatalytic process. The reuse evaluation of the fibers indicated that their photocatalytic activity had good stability.
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Affiliation(s)
- Yu Liu
- College of Environmental Science and Engineering, Nankai University, Tianjin 300071, China.
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41
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Ghanbary F, Modirshahla N, Khosravi M, Behnajady MA. Synthesis of TiO2 nanoparticles in different thermal conditions and modeling its photocatalytic activity with artificial neural network. J Environ Sci (China) 2012; 24:750-756. [PMID: 22894112 DOI: 10.1016/s1001-0742(11)60815-2] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/01/2023]
Abstract
Titanium dioxide (TiO2) nanoparticles were prepared by sol gel route. The preparation parameters were optimized in the removal of 4-nitrophenol (4-NP). All catalysts were analyzed by X-ray diffraction (XRD) and scanning electron microscopy (SEM). An artificial neural network model (ANN) was developed to predict the photocatalytic removal of 4-NP in the presence of TiO2 nanoparticles prepared under desired conditions. The comparison between the predicted results by designed ANN model and the experimental data proved that modeling of the removal process of 4-NP using artificial neural network was a precise method to predict the extent of 4-NP removal under different conditions.
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Affiliation(s)
- Fatemeh Ghanbary
- Department of Applied Chemistry, Faculty of Chemistry, North Tehran Branch, Islamic Azad University, Tehran, 1913674711, Islamic Republic of Iran.
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42
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Khataeea AR, Kasirib MB, Alidokht L. Application of response surface methodology in the optimization of photocatalytic removal of environmental pollutants using nanocatalysts. ENVIRONMENTAL TECHNOLOGY 2011; 33:1669-1684. [PMID: 22439553 DOI: 10.1080/09593330.2011.597432] [Citation(s) in RCA: 46] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
Response surface methodology is a widely used technique for modelling and optimization of the photocatalytic treatment processes of water and wastewater. This methodology not only estimates linear, interaction and quadratic effects of the factors on the response, but also provides a prediction model for the response at the range of the variables studied and the optimum conditions to achieve the highest performance. The present paper reviews the results of application of this innovative methodology in modelling and optimization of the photocatalytic treatment processes. Different experimental designs including 3k factorial, Doehlert, Box-Behnken and central composite designs have been developed to describe the treatment processes of dyeing effluents, pharmaceutical agents and hazardous phenolic compounds. The results showed that response surface methodology can describe the behaviour of complex reaction systems, such as photocatalytic processes, in the range of experimental conditions adopted. Optimization based on response surface methodology can also estimate the conditions of the photocatalytic processes to achieve the highest performance.
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Affiliation(s)
- A R Khataeea
- Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran.
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43
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Rasoulifard MH, Monfared HH, Masoudian S. Photo-assisted hetero-fenton decolorization of azo dye from contaminated water by Fe-Si mixed oxide nanocomposite. ENVIRONMENTAL TECHNOLOGY 2011; 32:1627-1635. [PMID: 22329154 DOI: 10.1080/09593330.2010.545996] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
An aerogel of silica gel dopeyd with 2.86 wt% Fe was prepared by an alkoxide sol-gel method and using tetraethyl orthosilicate as a precursor material. The synthesized aerogel was calcined at 500 degress C to produce nanoparticle solids, and was characterized by XRD, FT-IR and SEM. The nanosized iron-silica gel mixed oxide was tested in the photooxidation of the azo dye Acid Red 14 (AR 14) using 30% aqueous hydrogen peroxide as oxidant and UV light. The 2.86 wt% Fe-loaded SiO2 showed very good efficiency in the decolorization of AR 14. The effects of various parameters including solution pH, catalyst, oxidant and initial dye concentrations on photodegradation were investigated and the optimum conditions were determined. The catalyst was resistant to leaching and could be recycled several times without appreciable loss of activity.
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Affiliation(s)
- M H Rasoulifard
- Department of Chemistry, Faculty of Science, Zanjan University, Zanjan, Iran.
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44
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Mahyar A, Behnajady MA, Modirshahla N. Enhanced photocatalytic degradation of C.I. Basic Violet 2 using TiO2-SiO2 composite nanoparticles. Photochem Photobiol 2011; 87:795-801. [PMID: 21466559 DOI: 10.1111/j.1751-1097.2011.00930.x] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
In this report, TiO(2) -SiO(2) composite nanoparticles were prepared by the thermal hydrolysis method using titanium tetrachloride and tetraethylorthosilicate as TiO(2) and SiO(2) precursors, respectively. The prepared nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), nitrogen adsorption/desorption and UV-Vis diffuse reflectance spectroscopy (DRS). The results indicated that, in comparison with pure TiO(2), TiO(2)-SiO(2) composite nanoparticles had a higher thermal stability, which prevents phase transformation from anatase to rutile. In addition, the TiO(2)-SiO(2) nanoparticles had a higher specific surface area, larger pore volume, greater band gap energy and smaller crystallite size. Thus, the surface area of TiO(2)-40% SiO(2) composite nanoparticles was about 17 times higher than that of pure TiO(2) nanoparticles. The photocatalytic activity of TiO(2)-SiO(2) composite nanoparticles in the photodegradation of C.I. Basic Violet 2 was investigated. The photodegradation rate of Basic Violet 2 using TiO(2)-40% SiO(2) nanoparticles calcined at 600°C was much faster than that using pure TiO(2) and Degussa P25 TiO(2) by 10.9 and 4.3 times, respectively. The higher photoactivity of the TiO(2)-SiO(2) composite nanoparticles was attributed to their higher surface area, larger pore volume, greater band-gap energy and smaller crystallite size compared with pure TiO(2).
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Affiliation(s)
- Ali Mahyar
- Department of Chemistry, Faculty of Science, Tabriz Branch, Islamic Azad University, Tabriz, Iran.
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45
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Neelavannan MG, Basha CA. Thin wetted film cylindrical flow photo reactor for the degradation of Procion blue H-B dye over TiO2 and ZnO. ENVIRONMENTAL TECHNOLOGY 2011; 32:825-835. [PMID: 21879557 DOI: 10.1080/09593330.2010.514948] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/31/2023]
Abstract
A thin wetted film cylindrical flow reactor was fabricated for photocatalytic oxidation of Procion blue H-B dye in textile washwater with the suspensions of TiO2 and ZnO. The disappearance of colour and organic reduction were studied in terms of the removal of colour and chemical oxygen demand (COD). Operating parameters such as effect of pH, UV irradiation with and without catalyst, initial concentration of dye and effect of flow rate were studied and kinetics of Procion blue H-B dye has been studied over TiO2 and ZnO surfaces. Since adsorption is the prerequisite condition for decolorization/degradation of dye molecules in the presence of heterogeneous catalysis, the Langmuir and Freundlich isotherms were examined to verify the adsorption intensity. The results clearly demonstrated that, the optimum loading of the photocatalyst was found to be 300 and 400 mg/L of TiO2 and ZnO, respectively. The maximum COD reduction efficiency was 68% for TiO2 and 58% for ZnO. On the other hand, the colour removal efficiency was found to be 74% and 69%, respectively for TiO2- and ZnO-assisted systems under optimum conditions. Conclusively, these two semiconductors could degrade Procion blue H-B dye at different time intervals and both isotherms fit well.
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Affiliation(s)
- M G Neelavannan
- Pollution Control Section, Central Electrochemical Research Institute, Karaikudi, India.
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Khataee A, Zarei M, Dehghan G, Ebadi E, Pourhassan M. Biotreatment of a triphenylmethane dye solution using a Xanthophyta alga: Modeling of key factors by neural network. J Taiwan Inst Chem Eng 2011. [DOI: 10.1016/j.jtice.2010.08.006] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Optimization of biological treatment of a dye solution by macroalgae Cladophora sp. using response surface methodology. J Taiwan Inst Chem Eng 2011. [DOI: 10.1016/j.jtice.2010.03.007] [Citation(s) in RCA: 57] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/17/2022]
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Khataee AR, Fathinia M, Aber S. Kinetic Modeling of Liquid Phase Photocatalysis on Supported TiO2 Nanoparticles in a Rectangular Flat-Plate Photoreactor. Ind Eng Chem Res 2010. [DOI: 10.1021/ie101997u] [Citation(s) in RCA: 60] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- A. R. Khataee
- Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
| | - M. Fathinia
- Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
| | - S. Aber
- Department of Applied Chemistry, Faculty of Chemistry, University of Tabriz, Tabriz, Iran
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Khataee A, Kasiri M. Photocatalytic degradation of organic dyes in the presence of nanostructured titanium dioxide: Influence of the chemical structure of dyes. ACTA ACUST UNITED AC 2010. [DOI: 10.1016/j.molcata.2010.05.023] [Citation(s) in RCA: 374] [Impact Index Per Article: 26.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/19/2022]
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Kasiri MB, Aleboyeh H, Aleboyeh A. Mineralization of C.I. Acid Red 14 azo dye by UV/Fe-ZSM5/H2O2, process. ENVIRONMENTAL TECHNOLOGY 2010; 31:165-173. [PMID: 20391801 DOI: 10.1080/09593330903397771] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
The zeolite Fe-ZSM5 was applied as a heterogeneous catalyst in the photo-Fenton process for mineralization of azo dye Acid Red 14 (AR14). Under optimal conditions (20 mM of H2O2 0.25 g L(-1) of catalyst and initial natural pH of the solution) 76% of total organic carbon (TOC) of a solution containing 40 mg L(-1) of the dye could be removed after 120 min in a 1.0 L tubular, closed-circulation batch photoreactor. Leaching tests and comparative experiments indicated that the application of the heterogeneous catalyst could increase the photo-Fenton process efficiency. A kinetic model was developed for this process and showed that the dye mineralization rate obeyed the pseudo-first order kinetic when the initial concentration of the dye was low. It was also observed that the catalytic behaviour of Fe-ZSM5 could be reproduced in consecutive experiments without a considerable drop in the process efficiency. Estimation of electrical energy consumption (EE/O) of the process as a function of mineralization efficiency revealed that the UV/Fe-ZSM5/H2O2 process not only increased the mineralization efficiency of the process, but also decreased the cost of electrical energy consumed by the process.
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Affiliation(s)
- Masoud B Kasiri
- Laboratoire de Génie des Procédés Traitement des Effluents, Ecole Nationale Supérieure de Chimie de Mulhouse, Université de Haute Alsace, 3 rue Alfred Werner, 68093 Mulhouse, France.
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