The Experts below are selected from a list of 30 Experts worldwide ranked by ideXlab platform
Mehrorang Ghaedi - One of the best experts on this subject based on the ideXlab platform.
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synthesis of nanocomposites of iron oxide gold fe3o4 au loaded on activated carbon and their application in water treatment by using sonochemistry optimization study
Ultrasonics Sonochemistry, 2018Co-Authors: Saideh Bagheri, Mehrorang Ghaedi, Hossein Aghaei, Arash Asfaram, Majid Monajemi, Ali Akbar BazrafshanAbstract:Abstract This paper focuses on the finding best operational conditions using response surface methodology (RSM) for Rhodamine123 (R123) and Disulfine Blue (DSB) dyes removal by ultrasound assisted adsorption onto Au-Fe3O4 nanoparticles loaded on activated carbon (Au-Fe3O4 NPs-AC). The influences of variables such as initial R123 (X1) and DSB concentration (X2), pH (X3), adsorbent mass (X4) and sonication time (X5) on their removal were investigated by small central composite design (CCD) under response surface methodology. The significant variables and the possible interactions among variables were investigated and estimated accordingly. The best conditions were set as: 4 min, 4.0, 0.025 g, 13.5 and 26.5 mg L−1 for sonication time, pH, adsorbent weight, initial R123 and DSB concentration, respectively. At above conditions, the adsorption equilibrium and kinetic follow the Langmuir isotherm and pseudo-second-order kinetic model, respectively. The maximum monolayer capacity (Qmax) of 71.46 and 76.38 mg g−1 for R123 and DSB show sufficiency of model for well presentation of experimental data.
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photocatalytic degradation of Disulfine Blue using titanium dioxide nanoparticles under ultraviolet light irradiation a response surface methodology approach
Environmental Progress, 2016Co-Authors: Ahmad Bagheri, Mehrorang Ghaedi, Shaaker Hajati, Morteza MontazerozohoriAbstract:Disulfine Blue (DSB) was photodegraded under ultraviolet (UV) light irradiation catalyzed by titanium dioxide (TiO2). To study this photodegradation, central composite design (CCD) under response surface methodology (RSM) was applied to design a systematic set of experiments. The pH was individually optimized and found to be 6.0. Variables such as initial dye concentration, photocatalyst dosage, and irradiation time were involved in the experiments while the dye photodegradation percentage was considered as response. The effects of variables on the response were studied and optimized. The optimum response (>90%) was obtained at condition 20 mg/L, 0.015 g and 35 min corresponding to DSB concentration, photocatalyst amount and irradiation time, respectively. The fact that the maximum DSB decomposition has been performed at neutral pH by using small amount of photocatalyst is an advantage of the procedure applied. From kinetics study of DSB photocatalytic degradation, the rate constant was found to be 0.0748 min−1. The Langmuir–Hinshelwood rate constant and adsorption constant were found to be 3.68 mg/min L and 0.00933 L/mg, respectively. © 2016 American Institute of Chemical Engineers Environ Prog, 35: 1657–1663, 2016
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ultrasonically assisted hydrothermal synthesis of activated carbon hkust 1 mof hybrid for efficient simultaneous ultrasound assisted removal of ternary organic dyes and antibacterial investigation taguchi optimization
Ultrasonics Sonochemistry, 2016Co-Authors: Nasiri F Azad, Mehrorang Ghaedi, Shaaker Hajati, Kheibar Dashtian, Vahid PezeshkpourAbstract:Activated carbon (AC) composite with HKUST-1 metal organic framework (AC-HKUST-1 MOF) was prepared by ultrasonically assisted hydrothermal method and characterized by FTIR, SEM and XRD analysis and laterally was applied for the simultaneous ultrasound-assisted removal of crystal violet (CV), Disulfine Blue (DSB) and quinoline yellow (QY) dyes in their ternary solution. In addition, this material, was screened in vitro for their antibacterial actively against Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (PAO1) bacteria. In dyes removal process, the effects of important variables such as initial concentration of dyes, adsorbent mass, pH and sonication time on adsorption process optimized by Taguchi approach. Optimum values of 4, 0.02 g, 4 min, 10 mg L(-1) were obtained for pH, AC-HKUST-1 MOF mass, sonication time and the concentration of each dye, respectively. At the optimized condition, the removal percentages of CV, DSB and QY were found to be 99.76%, 91.10%, and 90.75%, respectively, with desirability of 0.989. Kinetics of adsorption processes follow pseudo-second-order model. The Langmuir model as best method with high applicability for representation of experimental data, while maximum mono layer adsorption capacity for CV, DSB and QY on AC-HKUST-1 estimated to be 133.33, 129.87 and 65.37 mg g(-1) which significantly were higher than HKUST-1 as sole material with Qm to equate 59.45, 57.14 and 38.80 mg g(-1), respectively.
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hkust 1 mof bivo4 hybrid as a new sonophotocatalyst for simultaneous degradation of Disulfine Blue and rose bengal dyes optimization and statistical modelling
RSC Advances, 2016Co-Authors: Soleiman Mosleh, Mehrorang Ghaedi, M R Rahimi, Kheibar DashtianAbstract:A new hybrid material composed of BiVO4 and HKUST-1 MOF (HKUST-1-MOF–BiVO4), which is active under Blue light irradiation, was synthesized and characterized by XRD, FE-SEM, BET, BJH, EDS and DRS analysis. Subsequently, this sonophotocatalyst was applied for simultaneous sonophotodegradation of Disulfine Blue (DB) and rose bengal (RB). The influence of conventional variables such as initial dyes concentration (5–45 mg L−1), HKUST-1-MOF–BiVO4 mass (0.1–0.3 g L−1), flow rate (40–120 mL min−1), pH (2–10) and time of irradiation (5–25 min) upon sonophotocatalytic degradation efficiency was studied by central composite design (CCD). The results analysis revealed that optimum values for the variables studies were found to be 0.2 g L−1, 30 and 30 mg L−1, 80 mL min−1, 6 and 20 min for the HKUST-1-MOF–BiVO4 mass, initial concentration of DB and RB, flow rate, pH and irradiation time, respectively. Under the optimum conditions, the sonophotocatalytic DB and RB degradation percentages at desirability function value of 1.0 were found to be 99.98% and 98.76%, respectively. A kinetics study revealed that the Langmuir–Hinshelwood (L–H) kinetics model was well fitted to the experimental data. Finally, contributions from sonocatalysis and photocatalysis using synergy index and the stability of HKUST-1-MOF–BiVO4 were investigated.
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optimization of the process parameters for the adsorption of ternary dyes by ni doped feo oh nws ac using response surface methodology and an artificial neural network
RSC Advances, 2016Co-Authors: Farshid Nasiri Azad, Mehrorang Ghaedi, Arash Asfaram, Arsalan Jamshidi, Ghasem Hassani, Alireza Goudarzi, Mohammad Hossein Ahmadi Azqhandi, A M GhaediAbstract:The present study deals with the simultaneous removal of chrysoidine G (CG), rhodamine B (RB) and Disulfine Blue (DB) by Ni doped ferric oxyhydroxide FeO(OH) nanowires on activated carbon (Ni doped FeO(OH)-NWs–AC). The adsorbent was characterized using X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM) and scanning electron microscopy (SEM). Derivative spectrophotometry was used for investigation of simultaneous dye adsorption by an artificial neural network (ANN) and response surface methodology (RSM) to analyse and model their adsorption behavior. Using the ANN analysis, the optimal configuration of the ANN model for modeling of the adsorption process was found to be (6:(4–6):3). The effect of adsorption parameters such as initial pH, adsorbent mass, sonication time and initial CG, RB and DB concentration was studied using central composite design (CCD), while design results were also utilized as a training set for the ANN. After predicting the model using RSM and ANN, the two methodologies were statistically compared by their coefficient of determination, root mean square error, absolute average deviation and mean absolute error based on the validation data set. Results suggest that ANN has better prediction performance as compared to RSM. It was also found that response surface methodology (RSM) predicts the suitability of output parameters. The adsorption mechanism and process rates were investigated by analyzing time dependency data using various conventional kinetic models such as pseudo-first-order and second order, intra-particle diffusion and Elovich models and the best fit was obtained by a pseudo-second-order kinetic model with good agreement between the equilibrium and expected adsorption data. The experimental results revealed that dye adsorption was highly linear and followed the Langmuir isotherm model with maximum adsorption capacities of 187.420 (CG), 210.170 (RB) and 235.650 mg g−1 (DB).
Kheibar Dashtian - One of the best experts on this subject based on the ideXlab platform.
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ultrasonically assisted hydrothermal synthesis of activated carbon hkust 1 mof hybrid for efficient simultaneous ultrasound assisted removal of ternary organic dyes and antibacterial investigation taguchi optimization
Ultrasonics Sonochemistry, 2016Co-Authors: Nasiri F Azad, Mehrorang Ghaedi, Shaaker Hajati, Kheibar Dashtian, Vahid PezeshkpourAbstract:Activated carbon (AC) composite with HKUST-1 metal organic framework (AC-HKUST-1 MOF) was prepared by ultrasonically assisted hydrothermal method and characterized by FTIR, SEM and XRD analysis and laterally was applied for the simultaneous ultrasound-assisted removal of crystal violet (CV), Disulfine Blue (DSB) and quinoline yellow (QY) dyes in their ternary solution. In addition, this material, was screened in vitro for their antibacterial actively against Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (PAO1) bacteria. In dyes removal process, the effects of important variables such as initial concentration of dyes, adsorbent mass, pH and sonication time on adsorption process optimized by Taguchi approach. Optimum values of 4, 0.02 g, 4 min, 10 mg L(-1) were obtained for pH, AC-HKUST-1 MOF mass, sonication time and the concentration of each dye, respectively. At the optimized condition, the removal percentages of CV, DSB and QY were found to be 99.76%, 91.10%, and 90.75%, respectively, with desirability of 0.989. Kinetics of adsorption processes follow pseudo-second-order model. The Langmuir model as best method with high applicability for representation of experimental data, while maximum mono layer adsorption capacity for CV, DSB and QY on AC-HKUST-1 estimated to be 133.33, 129.87 and 65.37 mg g(-1) which significantly were higher than HKUST-1 as sole material with Qm to equate 59.45, 57.14 and 38.80 mg g(-1), respectively.
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hkust 1 mof bivo4 hybrid as a new sonophotocatalyst for simultaneous degradation of Disulfine Blue and rose bengal dyes optimization and statistical modelling
RSC Advances, 2016Co-Authors: Soleiman Mosleh, Mehrorang Ghaedi, M R Rahimi, Kheibar DashtianAbstract:A new hybrid material composed of BiVO4 and HKUST-1 MOF (HKUST-1-MOF–BiVO4), which is active under Blue light irradiation, was synthesized and characterized by XRD, FE-SEM, BET, BJH, EDS and DRS analysis. Subsequently, this sonophotocatalyst was applied for simultaneous sonophotodegradation of Disulfine Blue (DB) and rose bengal (RB). The influence of conventional variables such as initial dyes concentration (5–45 mg L−1), HKUST-1-MOF–BiVO4 mass (0.1–0.3 g L−1), flow rate (40–120 mL min−1), pH (2–10) and time of irradiation (5–25 min) upon sonophotocatalytic degradation efficiency was studied by central composite design (CCD). The results analysis revealed that optimum values for the variables studies were found to be 0.2 g L−1, 30 and 30 mg L−1, 80 mL min−1, 6 and 20 min for the HKUST-1-MOF–BiVO4 mass, initial concentration of DB and RB, flow rate, pH and irradiation time, respectively. Under the optimum conditions, the sonophotocatalytic DB and RB degradation percentages at desirability function value of 1.0 were found to be 99.98% and 98.76%, respectively. A kinetics study revealed that the Langmuir–Hinshelwood (L–H) kinetics model was well fitted to the experimental data. Finally, contributions from sonocatalysis and photocatalysis using synergy index and the stability of HKUST-1-MOF–BiVO4 were investigated.
Vahid Pezeshkpour - One of the best experts on this subject based on the ideXlab platform.
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ultrasonically assisted hydrothermal synthesis of activated carbon hkust 1 mof hybrid for efficient simultaneous ultrasound assisted removal of ternary organic dyes and antibacterial investigation taguchi optimization
Ultrasonics Sonochemistry, 2016Co-Authors: Nasiri F Azad, Mehrorang Ghaedi, Shaaker Hajati, Kheibar Dashtian, Vahid PezeshkpourAbstract:Activated carbon (AC) composite with HKUST-1 metal organic framework (AC-HKUST-1 MOF) was prepared by ultrasonically assisted hydrothermal method and characterized by FTIR, SEM and XRD analysis and laterally was applied for the simultaneous ultrasound-assisted removal of crystal violet (CV), Disulfine Blue (DSB) and quinoline yellow (QY) dyes in their ternary solution. In addition, this material, was screened in vitro for their antibacterial actively against Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (PAO1) bacteria. In dyes removal process, the effects of important variables such as initial concentration of dyes, adsorbent mass, pH and sonication time on adsorption process optimized by Taguchi approach. Optimum values of 4, 0.02 g, 4 min, 10 mg L(-1) were obtained for pH, AC-HKUST-1 MOF mass, sonication time and the concentration of each dye, respectively. At the optimized condition, the removal percentages of CV, DSB and QY were found to be 99.76%, 91.10%, and 90.75%, respectively, with desirability of 0.989. Kinetics of adsorption processes follow pseudo-second-order model. The Langmuir model as best method with high applicability for representation of experimental data, while maximum mono layer adsorption capacity for CV, DSB and QY on AC-HKUST-1 estimated to be 133.33, 129.87 and 65.37 mg g(-1) which significantly were higher than HKUST-1 as sole material with Qm to equate 59.45, 57.14 and 38.80 mg g(-1), respectively.
Mohammad Jaafar Soltanianfard - One of the best experts on this subject based on the ideXlab platform.
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synthesis and characterization of cofe2o4 sio2 polyethyleneimine magnetic nanoparticle and its application for ultrasonic assisted removal of Disulfine Blue dye from aqueous solution
Arabian Journal of Chemistry, 2020Co-Authors: Maria Bektar, Hossein Ali Rasekh, Mohammad Jaafar SoltanianfardAbstract:Abstract In the present work, a simple synthesis approach was applied for the fabrication of CoFe2O4@SiO2-polyethyleneimine magnetic nanoparticles as an effective sorbent for ultrasonic-assisted removal of Disulfine Blue dye from an aqueous solution. For identification and characterization of prepared sorbent, different analysis including Fourier transform infrared spectroscopy (FT-IR), Field emission scanning electron microscopy (FE-SEM), Vibrating sample magnetometer (VSM), Energy dispersive X-ray analysis (EDX) and Transmission electron microscopy (TEM) were applied. The effect of effective parameters on the removal of Disulfine Blue such as pH, sorbent mass, ultrasonic time and Disulfine Blue concentration were also assessed. The optimum values for investigated parameters were achieved to be as follows: pH of 5.0, sorbent mass of 0.015 g, ultrasonic time of 5.0 min and Disulfine Blue concentration of 10.0 mg L−1. Different isotherm and kinetic models were used for the evaluation of isotherm and kinetic of adsorption. Results showed that the Langmuir isotherm model was better than other isotherm models as well as the second-order equation model was selected as a kinetic model. The maximum adsorption capacity of the proposed magnetic sorbent was achieved to be 110.0 mg g−1 which shows the applicability of proposed sorbent for removal of Disulfine Blue dye from aqueous solution.
Nasiri F Azad - One of the best experts on this subject based on the ideXlab platform.
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ultrasonically assisted hydrothermal synthesis of activated carbon hkust 1 mof hybrid for efficient simultaneous ultrasound assisted removal of ternary organic dyes and antibacterial investigation taguchi optimization
Ultrasonics Sonochemistry, 2016Co-Authors: Nasiri F Azad, Mehrorang Ghaedi, Shaaker Hajati, Kheibar Dashtian, Vahid PezeshkpourAbstract:Activated carbon (AC) composite with HKUST-1 metal organic framework (AC-HKUST-1 MOF) was prepared by ultrasonically assisted hydrothermal method and characterized by FTIR, SEM and XRD analysis and laterally was applied for the simultaneous ultrasound-assisted removal of crystal violet (CV), Disulfine Blue (DSB) and quinoline yellow (QY) dyes in their ternary solution. In addition, this material, was screened in vitro for their antibacterial actively against Methicillin-resistant Staphylococcus aureus (MRSA) and Pseudomonas aeruginosa (PAO1) bacteria. In dyes removal process, the effects of important variables such as initial concentration of dyes, adsorbent mass, pH and sonication time on adsorption process optimized by Taguchi approach. Optimum values of 4, 0.02 g, 4 min, 10 mg L(-1) were obtained for pH, AC-HKUST-1 MOF mass, sonication time and the concentration of each dye, respectively. At the optimized condition, the removal percentages of CV, DSB and QY were found to be 99.76%, 91.10%, and 90.75%, respectively, with desirability of 0.989. Kinetics of adsorption processes follow pseudo-second-order model. The Langmuir model as best method with high applicability for representation of experimental data, while maximum mono layer adsorption capacity for CV, DSB and QY on AC-HKUST-1 estimated to be 133.33, 129.87 and 65.37 mg g(-1) which significantly were higher than HKUST-1 as sole material with Qm to equate 59.45, 57.14 and 38.80 mg g(-1), respectively.