Removal of methyl orange by multiwall carbon nanotube accelerated by ultrasound devise: Optimized experimental design

Ghaedi, Mehrorang; Hajati, Shaaker; Zaree, M.; Shajaripour, Y.; Asfaram, Arash; Purkait, Mihir Kumar

doi:10.1016/j.apt.2015.05.002

Cited by 37 publications

(6 citation statements)

References 45 publications

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“…The experiments were also performed in the initial dye concentration range of 2-20 mg L -1 to obtain adsorption isotherms. The dye removal percentage was calculated using the following equation [37]:…”

Section: Ultrasound-assisted Adsorption Methodsmentioning

confidence: 99%

Multi-response optimization of ultrasound assisted competitive adsorption of dyes onto Cu (OH)2-nanoparticle loaded activated carbon: Central composite design

Dashamiri

Ghaedi

Asfaram

et al. 2017

Ultrasonics Sonochemistry

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This paper focuses on the development of an effective methodology to obtain the optimum removal conditions assisted by ultrasonics to maximize the simultaneous removal of dyes, eosin Y (EY), methylene blue (MB) and phenol red (PR), by Cu(OH)-NP-AC in aqueous solution using response surface methodology (RSM). The effects of variables such as pH, initial dyes concentrations (mgL), and amount of sorbent (mg) and sonication time (min) on the dyes removal were studied. A central composite design (CCD) was applied to evaluate the interactive effects of adsorption variables. A good correlation (with R>0.940) between the statistical model and experiment was found for dyes removal from aqueous wastewater using the adsorbent. The optimum removal (99.20%±1.48) was thus obtained at pH 6.0, ultrasound time 2.5min, adsorbent mass 20mg and initial dye concentration at 5mgL for MB and EY and 12.5mgL for PR. The maximum adsorption capacity (Q) was calculated from the Langmuir isotherm as 32.9, 26.4 and 38.5mgg for the MB, EY and PR, respectively for the 0.015g of sorbent. The adsorption kinetic data of the dyes were analyzed and was found fitting well in a pseudo-second-order equation. Adsorption isotherms and separation factors showed that the adsorbent displays a high selectivity toward one dye in a three-component system with an affinity order of PR>MB>EY. On the other hand, acoustic waves emitted by the cavitation bubbles render a direct effect on the process. This is attributed to the discrete nature and high pressure amplitude of the waves, which creates excessively high convection in the medium, causing adsorption of the pollutants. The chemical nature of the pollutants influences the enhancement effect of ultrasound.

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Section: Ultrasound-assisted Adsorption Methodsmentioning

confidence: 99%

Multi-response optimization of ultrasound assisted competitive adsorption of dyes onto Cu (OH)2-nanoparticle loaded activated carbon: Central composite design

Dashamiri

Ghaedi

Asfaram

et al. 2017

Ultrasonics Sonochemistry

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show abstract

“…Adsorption especially based on unique remarks like simple design, easy operation based on application of green and non-toxic adsorbent is good candidate for removal of huge amount of dyes in short time using at least reagent consumption [10,[28][29][30] . Deposition and loading nanoparticles onto activated carbon as most conventional and popular material lead to increase in reactive center and adsorption capacity.…”

Section: Introductionmentioning

confidence: 99%

“…There are many factors affecting the ultrasound-assisted adsorption method such as sonication time, pH, adsorbent dosage and initial dye concentration. A good selection of design and optimization models makes possible to simultaneously evaluate the variables contribution (main and interaction) on adsorption process which in present study was obtained by experimental design [29,39]. Response surface methodology (RSM) is enables the researchers to get optimum condition using the first or second order polynomial equations.…”

Section: Introductionmentioning

confidence: 99%

Performance of CuS nanoparticle loaded on activated carbon in the adsorption of methylene blue and bromophenol blue dyes in binary aqueous solutions: Using ultrasound power and optimization by central composite design

Mazaheri

Ghaedi

Asfaram

et al. 2016

Journal of Molecular Liquids

119

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In this research, simultaneous adsorption of Bromophenol blue (BPB) and Methylene blue (MB) dyes in binary mixture onto activated carbon modified with CuS nanoparticle were studied. The CuS nanoparticle loaded on activated carbon (CuS-NP-AC) was synthesized and identifying by SEM and XRD analysis. The effect of pH on their removal percentage in single and binary system were examined, while the individual and combination effect of factors variables such as concentration of MB and BPB, amount of adsorbent and sonication time were studied by central composite design (CCD). Then, the adsorption kinetics and their isotherms investigation in binary solution reveal that data well fitted by Langmuir model in comparison to other models with maximum mono layer loading capacities of 106.4 and 208.3 mg g-1 of adsorbent for BPB and MB respectively in single-component. Ultrasonic is used instead of conventional magnetic stirrer to accelerate mass transfer and simultaneously shortened the removal time and amount of adsorbent. Sonication by lateral bubbling cause enhance in diffusion coefficient and finally enhance the removal percentage.

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“…However, treatments that dye effluent by using chemical and biological methods are technically complex and expensive. Among these methods, adsorption as a widely available and highly efficiency method is promising for the treatment of wastewater, and it is often used to eliminate different dyes in water. − …”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption of Methyl Orange Using a Modified Chitosan Magnetic Composite Adsorbent

Yang

Qiu²,

Yang

2016

J. Chem. Eng. Data

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Glutaraldehyde cross-linked chitosan-coated Fe 3 O 4 nanocomposites (MCNPs) were successfully synthesized for the removal of methyl orange (MO) from wastewater. Experimental conditions such as the pH, cation surfactant dosage, nanoadsorbent dosage, and ionic strength were also investigated. Kinetics date was better fit by a pseudosecond-order model, indicating that adsorption was the ratelimiting step. The Freundlich models (R 2 = 0.9794) fit the experimental data better than the Langmuir models, and the theoretical maximum adsorption capacity was 758 mg g −1 . The values of the Gibbs free energy (ΔG°= −7.27 kJ mol −1 ), enthalpy (ΔH°= 0.001 kJ mol −1 ), and entropy (ΔS°= 23.58 J mol −1 ) indicated the spontaneous and endothermic process of MO adsorption. The prepared MCNPs showed 96−98% adsorption of MO by adding 0.2 mg of cationic surfactant cetyltrimethylammonium bromide (CTAB) to form mixed hemimicelles and can be easily regenerated with a 0.1 mol L −1 HCl solution.

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Removal of methyl orange by multiwall carbon nanotube accelerated by ultrasound devise: Optimized experimental design

Cited by 37 publications

References 45 publications

Multi-response optimization of ultrasound assisted competitive adsorption of dyes onto Cu (OH)2-nanoparticle loaded activated carbon: Central composite design

Multi-response optimization of ultrasound assisted competitive adsorption of dyes onto Cu (OH)2-nanoparticle loaded activated carbon: Central composite design

Performance of CuS nanoparticle loaded on activated carbon in the adsorption of methylene blue and bromophenol blue dyes in binary aqueous solutions: Using ultrasound power and optimization by central composite design

Efficient Adsorption of Methyl Orange Using a Modified Chitosan Magnetic Composite Adsorbent

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