The Experts below are selected from a list of 33384 Experts worldwide ranked by ideXlab platform
Mehrorang Ghaedi - One of the best experts on this subject based on the ideXlab platform.
-
zinc oxide nanorod loaded activated carbon for ultrasound assisted adsorption of safranin o Central Composite Design and genetic algorithm optimization
Applied Organometallic Chemistry, 2018Co-Authors: Ebrahim Sharifpour, H Hadadi, Mehrorang Ghaedi, Nasiri F Azad, Kheibar Dashtian, Mihir Kumar PurkaitAbstract:This paper focuses on the development of an effective methodology to obtain the optimum ultrasonic-assisted removal of a dye, safranin O (SO), under optimum conditions that maximize the removal percentage, using ZnO nanorod-loaded activated carbon (ZnO-NRs-AC) in aqueous solution. Central Composite Design coupled with genetic algorithm was used for parameter optimization. The effects of variables such as pH, initial dye concentration, mass of ZnO-NRs-AC and sonication time were studied. The interactive and main effects of these variables were evaluated using analysis of variance. The structural and physicochemical properties of the ZnO-NRs-AC adsorbent were investigated using field emission scanning electron microscopy and X-ray diffraction. Adsorption equilibrium data were fitted well with the Langmuir isotherm and the maximum monolayer capacity was found to be 32.06 mg g−1. Studies of the adsorption kinetics of the SO dye showed a rapid sorption dynamic with a pseudo-second-order kinetic model, suggesting a chemisorption mechanism.
-
Central Composite Design and genetic algorithm applied for the optimization of ultrasonic-assisted removal of malachite green by ZnO Nanorod-loaded activated carbon
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2016Co-Authors: Mehrorang Ghaedi, Shaaker Hajati, Nasiri F Azad, Kheibar Dashtian, Alireza Goudarzi, Mustafa SoylakAbstract:Maximum malachite green (MG) adsorption onto ZnO Nanorod-loaded activated carbon (ZnO-NR-AC) was achieved following the optimization of conditions, while the mass transfer was accelerated by ultrasonic. The Central Composite Design (CCD) and genetic algorithm (GA) were used to estimate the effect of individual variables and their mutual interactions on the MG adsorption as response and to optimize the adsorption process. The ZnO-NR-AC surface morphology and its properties were identified via FESEM, XRD and FTIR. The adsorption equilibrium isotherm and kinetic models investigation revealed the well fit of the experimental data to Langmuir isotherm and pseudo-second-order kinetic model, respectively. It was shown that a small amount of ZnO-NR-AC (with adsorption capacity of 20 mg g- 1) is sufficient for the rapid removal of high amount of MG dye in short time (3.99 min).
-
simultaneous ultrasonic assisted removal of malachite green and safranin o by copper nanowires loaded on activated carbon Central Composite Design optimization
RSC Advances, 2015Co-Authors: Mostafa Roosta, Mehrorang Ghaedi, Arash AsfaramAbstract:The present study investigates the simultaneous ultrasound-assisted adsorption of malachite green (MG) and safranin O (SO) dyes from aqueous solutions by ultrasound-assisted adsorption onto copper nanowires loaded on activated carbon (Cu-NWs-AC). In this study a novel and green approach is described for the synthesis of Cu nanowires. This novel material was characterized using different techniques such as FESEM, XRD, EDS, and UV-vis. The effects of variables such as sonication time, pH, adsorbent dosage, and initial dye concentrations on simultaneous dye removals were studied and optimized by a Central Composite Design (CCD) combined with a desirability function (DF). A good agreement between experimental and predicted data using an optimal model in this study was observed. These results indicated that when a small amount of proposed adsorbent (0.022 g) was applied, it resulted in simultaneous removal of 15 mg L−1 of malachite green and 15 mg L−1 of safranin O (>99%) in a short time (6.0 min) at a pH of 5.5.
-
application of Central Composite Design for simultaneous removal of methylene blue and pb2 ions by walnut wood activated carbon
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015Co-Authors: Mehrorang Ghaedi, H Mazaheri, Saeid Khodadoust, Shaaker Hajati, Mihir Kumar PurkaitAbstract:Activated carbon was prepared from walnut wood which was locally available, non-toxic, abundant and cheap. This new adsorbent was characterized using BET, FTIR and SEM. Point of zero charge (pHpzc) and oxygen containing functional groups were also determined. The prepared adsorbent was applied for simultaneous removal of Pb2+ ions and methylene blue (MB) dye from aqueous solution. The prominent effect and interaction of variables such as amount of adsorbent, contact time, concentration of MB and Pb2+ ions were optimized by Central Composite Design. The equilibrium data obtained at optimum condition were fitted to conventional isotherm models and found that Langmuir model was the best fitted isotherm. Kinetic data were fitted using various models. It was revealed that the adsorption rate follows pseudo-second order kinetic model and intraparticle diffusion model.
-
simultaneous ultrasound assisted removal of sunset yellow and erythrosine by zns ni nanoparticles loaded on activated carbon optimization by Central Composite Design
Ultrasonics Sonochemistry, 2014Co-Authors: Mostafa Roosta, Ali Daneshfar, R. Sahraei, Soraya Darafarin, Mehrorang Ghaedi, Mihir Kumar PurkaitAbstract:The present study focused on the simultaneous ultrasound-assisted removal of sunset yellow and erythrosine dyes from aqueous solutions using ZnS:Ni nanoparticles loaded on activated carbon (ZnS:Ni-NP-AC) as an adsorbent. ZnS:Ni nanoparticles were synthesized and characterized using different techniques such as FESEM, XRD and TEM. The effects of various parameters such as sonication time, pH, initial dye concentrations and adsorbent dose on the percentage of dye removal were investigated. Parameters were optimized by Central Composite Design (CCD) combined with response surface methodology (RSM) and desirability function (DF). A good agreement between experimental and predicted values was observed. The ultrasound-assisted adsorbent (0.04 g) was capable of high percentage removal (98.7% and 99.6%) of sunset yellow and erythrosine in short time (3.8 min).
Mihir Kumar Purkait - One of the best experts on this subject based on the ideXlab platform.
-
zinc oxide nanorod loaded activated carbon for ultrasound assisted adsorption of safranin o Central Composite Design and genetic algorithm optimization
Applied Organometallic Chemistry, 2018Co-Authors: Ebrahim Sharifpour, H Hadadi, Mehrorang Ghaedi, Nasiri F Azad, Kheibar Dashtian, Mihir Kumar PurkaitAbstract:This paper focuses on the development of an effective methodology to obtain the optimum ultrasonic-assisted removal of a dye, safranin O (SO), under optimum conditions that maximize the removal percentage, using ZnO nanorod-loaded activated carbon (ZnO-NRs-AC) in aqueous solution. Central Composite Design coupled with genetic algorithm was used for parameter optimization. The effects of variables such as pH, initial dye concentration, mass of ZnO-NRs-AC and sonication time were studied. The interactive and main effects of these variables were evaluated using analysis of variance. The structural and physicochemical properties of the ZnO-NRs-AC adsorbent were investigated using field emission scanning electron microscopy and X-ray diffraction. Adsorption equilibrium data were fitted well with the Langmuir isotherm and the maximum monolayer capacity was found to be 32.06 mg g−1. Studies of the adsorption kinetics of the SO dye showed a rapid sorption dynamic with a pseudo-second-order kinetic model, suggesting a chemisorption mechanism.
-
application of Central Composite Design for simultaneous removal of methylene blue and pb2 ions by walnut wood activated carbon
Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy, 2015Co-Authors: Mehrorang Ghaedi, H Mazaheri, Saeid Khodadoust, Shaaker Hajati, Mihir Kumar PurkaitAbstract:Activated carbon was prepared from walnut wood which was locally available, non-toxic, abundant and cheap. This new adsorbent was characterized using BET, FTIR and SEM. Point of zero charge (pHpzc) and oxygen containing functional groups were also determined. The prepared adsorbent was applied for simultaneous removal of Pb2+ ions and methylene blue (MB) dye from aqueous solution. The prominent effect and interaction of variables such as amount of adsorbent, contact time, concentration of MB and Pb2+ ions were optimized by Central Composite Design. The equilibrium data obtained at optimum condition were fitted to conventional isotherm models and found that Langmuir model was the best fitted isotherm. Kinetic data were fitted using various models. It was revealed that the adsorption rate follows pseudo-second order kinetic model and intraparticle diffusion model.
-
simultaneous ultrasound assisted removal of sunset yellow and erythrosine by zns ni nanoparticles loaded on activated carbon optimization by Central Composite Design
Ultrasonics Sonochemistry, 2014Co-Authors: Mostafa Roosta, Ali Daneshfar, R. Sahraei, Soraya Darafarin, Mehrorang Ghaedi, Mihir Kumar PurkaitAbstract:The present study focused on the simultaneous ultrasound-assisted removal of sunset yellow and erythrosine dyes from aqueous solutions using ZnS:Ni nanoparticles loaded on activated carbon (ZnS:Ni-NP-AC) as an adsorbent. ZnS:Ni nanoparticles were synthesized and characterized using different techniques such as FESEM, XRD and TEM. The effects of various parameters such as sonication time, pH, initial dye concentrations and adsorbent dose on the percentage of dye removal were investigated. Parameters were optimized by Central Composite Design (CCD) combined with response surface methodology (RSM) and desirability function (DF). A good agreement between experimental and predicted values was observed. The ultrasound-assisted adsorbent (0.04 g) was capable of high percentage removal (98.7% and 99.6%) of sunset yellow and erythrosine in short time (3.8 min).
Mostafa Roosta - One of the best experts on this subject based on the ideXlab platform.
-
simultaneous ultrasonic assisted removal of malachite green and safranin o by copper nanowires loaded on activated carbon Central Composite Design optimization
RSC Advances, 2015Co-Authors: Mostafa Roosta, Mehrorang Ghaedi, Arash AsfaramAbstract:The present study investigates the simultaneous ultrasound-assisted adsorption of malachite green (MG) and safranin O (SO) dyes from aqueous solutions by ultrasound-assisted adsorption onto copper nanowires loaded on activated carbon (Cu-NWs-AC). In this study a novel and green approach is described for the synthesis of Cu nanowires. This novel material was characterized using different techniques such as FESEM, XRD, EDS, and UV-vis. The effects of variables such as sonication time, pH, adsorbent dosage, and initial dye concentrations on simultaneous dye removals were studied and optimized by a Central Composite Design (CCD) combined with a desirability function (DF). A good agreement between experimental and predicted data using an optimal model in this study was observed. These results indicated that when a small amount of proposed adsorbent (0.022 g) was applied, it resulted in simultaneous removal of 15 mg L−1 of malachite green and 15 mg L−1 of safranin O (>99%) in a short time (6.0 min) at a pH of 5.5.
-
simultaneous ultrasound assisted removal of sunset yellow and erythrosine by zns ni nanoparticles loaded on activated carbon optimization by Central Composite Design
Ultrasonics Sonochemistry, 2014Co-Authors: Mostafa Roosta, Ali Daneshfar, R. Sahraei, Soraya Darafarin, Mehrorang Ghaedi, Mihir Kumar PurkaitAbstract:The present study focused on the simultaneous ultrasound-assisted removal of sunset yellow and erythrosine dyes from aqueous solutions using ZnS:Ni nanoparticles loaded on activated carbon (ZnS:Ni-NP-AC) as an adsorbent. ZnS:Ni nanoparticles were synthesized and characterized using different techniques such as FESEM, XRD and TEM. The effects of various parameters such as sonication time, pH, initial dye concentrations and adsorbent dose on the percentage of dye removal were investigated. Parameters were optimized by Central Composite Design (CCD) combined with response surface methodology (RSM) and desirability function (DF). A good agreement between experimental and predicted values was observed. The ultrasound-assisted adsorbent (0.04 g) was capable of high percentage removal (98.7% and 99.6%) of sunset yellow and erythrosine in short time (3.8 min).
Alireza Khataee - One of the best experts on this subject based on the ideXlab platform.
-
ultrasound assisted adsorption of textile dyes using modified nanoclay Central Composite Design optimization
Korean Journal of Chemical Engineering, 2016Co-Authors: Aydin Hassani, Semra Karaca, Murat Kiransan, Reza Darvishi Cheshmeh Soltani, Canan Karaca, Alireza KhataeeAbstract:The removal of two anionic dyes, C.I. Acid Orange 7 (AO7) and C.I. Acid Red 17 (AR17), by ultrasound-assisted adsorption on the modified nanoclay in aqueous solutions was studied. The modified nanoclay was characterized by SEM/EDX, BET, XRD and FT-IR techniques. The average crystal size for the interlayer spacing of the modified nanoclay was about 14.3 nm. Central Composite Design (CCD) was used for the optimization of the operational parameters, including the initial dye concentration, sonication time, adsorbent dosage and temperature. The results demonstrated a good agreement between the predicted values obtained by the model and the experimental values for both AO7 (R2= 0.959) and AR17 (R2=0.971).
-
adsorption of two cationic textile dyes from water with modified nanoclay a comparative study by using Central Composite Design
Journal of environmental chemical engineering, 2015Co-Authors: Aydin Hassani, Alireza Khataee, Semra Karaca, Melike Karaca, Murat KiransanAbstract:Abstract Comparative removal of two cationic dyes, Basic Green 4 (BG4) and Basic Yellow 28 (BY28), by chemically modified nanoclay was optimized using the Central Composite Design. The chemically modified nanoclay was characterized by SEM, EDX, FTIR, XRD and BET techniques. The average crystal size of nanoclay was about 16.5 nm. The accuracy of the model and regression coefficients was appraised by employing the analysis of variance (ANOVA). The results revealed a good agreement between the predicted values, as obtained by the model, and the experimental values for both BG4 ( R 2 = 0.960) and BY28 ( R 2 = 0.927). The optimum conditions proposed by Central Composite Design to reach the maximum dye removal through adsorption process. Under the optimum conditions, the removal efficiency of BG4 and BY28 were 82.35% and 98.78%, respectively. For BG4 and BY28, the pH of solution and adsorbent dosage were found to be the key factors that controlled dye adsorption, respectively.
-
optimization of the adsorption of a textile dye onto nanoclay using a Central Composite Design
Turkish Journal of Chemistry, 2015Co-Authors: Aydin Hassani, Alireza Khataee, Murat Kiransan, Reza Darvishi Cheshmeh Soltani, Semra KaracaAbstract:The main aim of this study was to evaluate the efficacy of montmorillonite clay for the adsorption of C.I. Basic Yellow 2 (BY2) dye from aqueous media. The experimental results were processed by response surface methodology based on a Central Composite Design (CCD). The effect of four main variables, including initial BY2 concentration, adsorbent dosage, reaction time, and temperature on the removal of BY2 was evaluated by the model. The accuracy of the model and regression coefficients was appraised by employing analysis of variance. The results demonstrated a good agreement between the predicted values obtained by the model and the experimental values (R$^{2\, }$= 0.972). Accordingly, the maximum BY2 removal of 97.32% was achieved with an initial BY2 concentration of 60 mg/L, adsorbent dosage of 0.6 g/L, reaction time of 10 min, and initial temperature of 25 $^{\circ}$C. The results demonstrated the high efficiency of montmorillonite clay for the adsorption of BY2 dye from aqueous solution based on the data processed by CCD approach. The adsorbent dosage was found to be the key factor that controlled dye adsorption. The adsorption kinetic and isotherm were also investigated. The rate of adsorption showed the best fit with the pseudo-second order model (R$^{2}$ = 1). The results of the isotherm study fit the Freundlich model (R$^{2} >$ 0.9). The physicochemical properties of the sample were determined by XRF, XRD, FT-IR, and N$_{2}$ adsorption--desorption.
-
optimized removal of reactive navy blue sp br by organo montmorillonite based adsorbents through Central Composite Design
Applied Clay Science, 2014Co-Authors: F Rasouli, Soheil Aber, Dariush Salari, Alireza KhataeeAbstract:Abstract In this study, the Montmorillonite K10 (MMT-K10) was activated by sulfuric acid, followed by modification with cetyltrimethylammonium bromide (CTAB). The Central Composite Design (CCD) was applied to optimize the activation process of MMT-K10. The effects of activation parameters (acid concentration, temperature, and contact time) on the decolorization efficiency of MMT-K10 (R%) were studied, and the optimum conditions were defined. The optimum values of input variables were found to be 50 °C (temperature), 3.6 mol/L (acid concentration) and 2.2 h (contact time). The predicted and experimental values of responses were in reasonable agreement with each other (R 2 = 0.968 and adj-R 2 = 0.940). The activated and modified MMT-K10 was characterized by FTIR, XRD, SEM and TEM techniques. The FT-IR analysis confirmed that acid-activation and modification caused the intercalation of CTAB in MMT-K10 layers and increase in specific surface area.
-
optimization of photocatalytic treatment of dye solution on supported tio2 nanoparticles by Central Composite Design intermediates identification
Journal of Hazardous Materials, 2010Co-Authors: Alireza Khataee, Soheil Aber, Mehrangiz Fathinia, Mahmoud ZareiAbstract:Optimization of photocatalytic degradation of C.I. Basic Blue 3 (BB3) under UV light irradiation using TiO(2) nanoparticles in a rectangular photoreactor was studied. The investigated TiO(2) was Millennium PC-500 (crystallites mean size 5-10 nm) immobilized on non-woven paper. Central Composite Design was used for optimization of UV/TiO(2) process. Predicted values of decolorization efficiency were found to be in good agreement with experimental values (R(2)=0.9686 and Adj-R(2)=0.9411). Optimization results showed that maximum decolorization efficiency was achieved at the optimum conditions: initial dye concentration 10mg/L, UV light intensity 47.2 W/m(2), flow rate 100 mL/min and reaction time 120 min. Photocatalytic mineralization of BB3 was monitored by total organic carbon (TOC) decrease, and changes in UV-vis and FT-IR spectra. The photodegradation compounds were analyzed by UV-vis, FT-IR and GC-mass techniques. The degradation pathway of BB3 was proposed based on the identified compounds.
Kheibar Dashtian - One of the best experts on this subject based on the ideXlab platform.
-
zinc oxide nanorod loaded activated carbon for ultrasound assisted adsorption of safranin o Central Composite Design and genetic algorithm optimization
Applied Organometallic Chemistry, 2018Co-Authors: Ebrahim Sharifpour, H Hadadi, Mehrorang Ghaedi, Nasiri F Azad, Kheibar Dashtian, Mihir Kumar PurkaitAbstract:This paper focuses on the development of an effective methodology to obtain the optimum ultrasonic-assisted removal of a dye, safranin O (SO), under optimum conditions that maximize the removal percentage, using ZnO nanorod-loaded activated carbon (ZnO-NRs-AC) in aqueous solution. Central Composite Design coupled with genetic algorithm was used for parameter optimization. The effects of variables such as pH, initial dye concentration, mass of ZnO-NRs-AC and sonication time were studied. The interactive and main effects of these variables were evaluated using analysis of variance. The structural and physicochemical properties of the ZnO-NRs-AC adsorbent were investigated using field emission scanning electron microscopy and X-ray diffraction. Adsorption equilibrium data were fitted well with the Langmuir isotherm and the maximum monolayer capacity was found to be 32.06 mg g−1. Studies of the adsorption kinetics of the SO dye showed a rapid sorption dynamic with a pseudo-second-order kinetic model, suggesting a chemisorption mechanism.
-
Central Composite Design and genetic algorithm applied for the optimization of ultrasonic-assisted removal of malachite green by ZnO Nanorod-loaded activated carbon
Spectrochimica Acta - Part A: Molecular and Biomolecular Spectroscopy, 2016Co-Authors: Mehrorang Ghaedi, Shaaker Hajati, Nasiri F Azad, Kheibar Dashtian, Alireza Goudarzi, Mustafa SoylakAbstract:Maximum malachite green (MG) adsorption onto ZnO Nanorod-loaded activated carbon (ZnO-NR-AC) was achieved following the optimization of conditions, while the mass transfer was accelerated by ultrasonic. The Central Composite Design (CCD) and genetic algorithm (GA) were used to estimate the effect of individual variables and their mutual interactions on the MG adsorption as response and to optimize the adsorption process. The ZnO-NR-AC surface morphology and its properties were identified via FESEM, XRD and FTIR. The adsorption equilibrium isotherm and kinetic models investigation revealed the well fit of the experimental data to Langmuir isotherm and pseudo-second-order kinetic model, respectively. It was shown that a small amount of ZnO-NR-AC (with adsorption capacity of 20 mg g- 1) is sufficient for the rapid removal of high amount of MG dye in short time (3.99 min).