Comparison of Activated Carbon, Multiwalled Carbon Nanotubes, and Cadmium Hydroxide Nanowire Loaded on Activated Carbon as Adsorbents for Kinetic and Equilibrium Study of Removal of Safranine O

Ghaedi, Mehrorang; Haghdoust, Shahin; Kokhdan, Syamak Nasiri; Mihandoost, A.; Sahraie, R.; Daneshfar, Ali

doi:10.1080/00387010.2011.641058

Cited by 48 publications

(18 citation statements)

References 43 publications

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“…The straight line confirms that the transport of 4-chlorophenol to the outer surface of adsorbents, diffusion and entering into particles (intra-particle diffusion) through the pores [32].…”

Section: Experimental Data For Intra-particle Diffusion Kineticsupporting

confidence: 57%

“…In order to study the mechanism of adsorption processes such as adsorption on the surface, chemical reaction and diffusion mechanisms, and determine the rate-controlling steps, kinetic models were used. The equations of these models and their important parameters are defined in Table 1 [30][31][32]. In this work, kinetic data obtained from experimental batch studies were tested using pseudofirst-order, pseudo-second-order and Elovich models.…”

Section: Adsorption Procedures Of 4-chlorophenolmentioning

confidence: 99%

“…(15) Table 2 [32]. In this work, the Langmuir, Freundlich, Tempkin and Dubinin-Radushkevich models were used to analysis the adsorption mechanism in the experiment.…”

Section: Tempkin Modelmentioning

confidence: 99%

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Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

S¹,

Madannejadb²

2016

J Pet Environ Biotechnol

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In this study, an ordered mesoporous carbon structure with excellent adsorption properties towards chlorophenol compounds was synthesized using a hard template. The physico-chemical properties of the synthesized samples were studied using Small Angle X-ray Diffraction (SAXRD), Transmission electron microscopy (TEM), Scanning Electron Microscopy (SEM) and nitrogen adsorption-desorption analysis. The capability of adsorption of 4-chlorophenol on mesoporous carbon has been investigated by varying the reaction time, initial concentration of 4-chlorophenol, adsorbents loading and the pH of the solution; and the results compared with commercial activated carbon as a microporous carbon.Freundlich, Langmuir, Tempkin and dubinin-radushkevich adsorption isotherms were used to model the equilibrium adsorption data for 4-chlorophenol compound. The kinetic analysis showed that the adsorption process was fitted with the pseudo-second-order kinetic model. The equilibrium data were investigated by the main adsorption isotherm models on the mesoporous and microporous carbons as adsorbents, which revealed that the Freundlich model was better to describe the 4-chlorophenol adsorption than other models. Also, the obtained results indicated that the adsorption capacity and equilibrium time for mesoporous carbon were better than microporous carbon, 90 mg/g after 25 minute compare to 60 mg/g after 60 minute, respectively.

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Section: Experimental Data For Intra-particle Diffusion Kineticsupporting

confidence: 57%

Section: Adsorption Procedures Of 4-chlorophenolmentioning

confidence: 99%

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Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

S¹,

Madannejadb²

2016

J Pet Environ Biotechnol

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“…Multi-walled carbon nanotubes (MWCNTs) have been shown to surpass cadmium hydroxide nanowire-loaded AC (Cd(OH) 2 -NW-AC) with respect to their efficient removal of safranin O (SO) from wastewater [83]. However, only few studies were reported on the application of CNTs for dye removal from aqueous solution [41,69,76,[84][85][86].…”

Section: Carbon Nanotubes (Cnts)mentioning

confidence: 99%

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

et al. 2017

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Nanomaterials have been extensively studied for heavy metal ions and dye removals from wastewater. This article reviews the role of nanomaterials as effective adsorbents for wastewater purification. In recent years, numerous novel nanomaterial adsorbents have been developed for enhancing the efficiency and adsorption capacities of removing contaminants from wastewater. The innovation, forthcoming development, and challenges of cost-effective and environmentally acceptable nanomaterials for water purification are discussed and reviewed in this article. This review concludes that nanomaterials have many unique morphological and structural properties that qualify them to be used as effective adsorbents to solve several environmental problems. Graphical Abstract& Hamidreza Sadegh

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“…The fitting ratio of M-MWCNT is lower than of M-AC. In the Freundlich parameters, if 1/n closes to zero and n is higher than unity, it shows the favorable physical process (Ghaedi et al 2012). According to the explanation, adsorption on M-MWCNT and M-AC shows the favorable physical process.…”

Section: Adsorption Isothermsmentioning

confidence: 99%

Isolation of naproxen from wastewater using carbon-based magnetic adsorbents

İlbay

Şahın

Kerkez

et al. 2015

Int. J. Environ. Sci. Technol.

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Naproxen is one of the mostly used drugs worldwide and is most abundant in wastewater. This study aims to adsorb naproxen from wastewater using magnetically modified carbon-based adsorbents. These adsorbents have very large specific area for naproxen adsorption, and magnetite modification provides easy separation and regeneration. The co-precipitation method was used for magnetic modification. Adsorption process was carried out in batches. The effect of adsorption variables was investigated. Langmuir, Freundlich, and Dubinin-Radushkevich isotherms were applied to the equilibrium data. The maximum adsorption capacities of adsorbents from Langmuir isotherm were found as 20.75 mg/g for magnetic multiwall carbon nanotubes and 87.79 mg/g for magnetic activated carbon. Pseudo-first-order kinetic model, pseudosecond-order kinetic model, intra-particle diffusion model, and Bangham model were used for determination of adsorption mechanisms. The rate-limiting step is electron exchange between the adsorbent and adsorbate. Both film diffusion and intra-particle diffusion occur while the adsorption process. DG°, DS°, and DH°were calculated for the process.

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Comparison of Activated Carbon, Multiwalled Carbon Nanotubes, and Cadmium Hydroxide Nanowire Loaded on Activated Carbon as Adsorbents for Kinetic and Equilibrium Study of Removal of Safranine O

Cited by 48 publications

References 43 publications

Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

Comparable Study of 4-chlorophenol Removal from Petrochemical Wastewater Using Mesoporous and Microporous Carbons: Equilibrium and Kinetics Investigations

The role of nanomaterials as effective adsorbents and their applications in wastewater treatment

Isolation of naproxen from wastewater using carbon-based magnetic adsorbents

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