Theoretical and experimental studies of benzoic acid batch adsorption dynamics using vermiculite-based adsorbent

Pouya, Ehsan Sadeghi; Abolghasemi, Hossein; Assar, Moein; Hashemi, S. J.; Salehpour, Alireza; Foroughi-Dahr, Mohammad

doi:10.1016/j.cherd.2014.07.016

Cited by 25 publications

(7 citation statements)

References 60 publications

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“…We have also estimated the maximum adsorption capacity, q max , of benzoic acid on Fe-MWNT by fitting the data with Langmuir Isotherm (similar to the analysis followed while estimating the q max of G-MWNT). We found that the q max values are ~ 375 mg/g, which is significantly higher than that of G-MWNT as well as several other adsorbents that are investigated in the past 37,38 . The estimated b value from Langmuir fitting for Fe-SWNT was only 28.6% of the value estimated for G-MWNTs (0.021 L/mg).…”

Section: Adsorption Of Benzoic Acid On Swntsmentioning

confidence: 69%

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Silva

Arsano

et al. 2020

Sci Rep

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Removal of harmful chemicals from water is paramount to environmental cleanliness and safety. As such, need for materials that will serve this purpose is in the forefront of environmental research that pertains to water purification. Here we show that bundles of single walled carbon nanotubes (SWNTs), synthesized by direct thermal decomposition of ferrocene (Fe(C5H5)2), can remove emerging contaminants like benzoic acid from water with high efficiencies. Experimental adsorption isotherm studies indicate that the sorption capacity of benzoic acid on these carbon nanotubes (CNTs) can be as high as 375 mg/g, which is significantly higher (in some cases an order of magnitude) than those reported previously for other adsorbents of benzoic acid such as activated carbon cloth, modified bentonite and commercially available graphitized multiwall carbon nanotubes (MWNTs). Our Molecular Dynamics (MD) simulation studies of experimental scenarios provided major insights related to this process of adsorption. The MD simulations indicate that, high binding energy sites present in SWNT bundles are majorly responsible for their enhanced adsorptive behavior compared to isolated MWNTs. These findings indicate that SWNT materials can be developed as scalable materials for efficient removal of environmental contaminants as well as for other sorption-based applications.

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Section: Adsorption Of Benzoic Acid On Swntsmentioning

confidence: 69%

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Silva

Arsano

et al. 2020

Sci Rep

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“…Pal et al reported that the Langmuir model can successfully describe the adsorption of toxic reactive blue 4, Congo red dyes, and Pb 2+ on adsorbents . Pouya et al found that the Toth and Freundlich models fitted the adsorption of benzoic acid on a vermiculite‐based adsorbent …”

Section: Methodsmentioning

confidence: 99%

“…[26][27][28] Pouya et al found that the Toth and Freundlich models fitted the adsorption of benzoic acid on a vermiculite-based adsorbent. [29] The Freundlich isotherm assumes that the adsorption on the adsorbent surface is multilayer and heterogeneous. The nonlinear isotherm equation is represented as follows: [30]…”

Section: Adsorption Equilibriummentioning

confidence: 99%

Adsorption diffusion behaviour of 4,6‐DMDBT from diesel fuel

Zheng

Huang

et al. 2016

Can J Chem Eng

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The equilibrium and kinetics of adsorption desulphurization of model diesel fuel under different operating conditions were investigated. The homogeneous surface diffusion model (HSDM) and pore diffusion model (PDM) taking into account external resistance and intraparticle resistance were employed to represent the adsorption kinetics of 4,6‐dimethyldibenzothiophene (4,6‐DMDBT). The equilibrium isotherm analysis revealed that the equilibrium can be represented well by the Freundlich model. The proposed HSDM model and PDM model can successfully describe the adsorption of 4,6‐DMDBT for different operating conditions studied. The adsorbate was absorbed rapidly initially because the adsorption rate at the beginning was dominated only by external diffusion. The Biot numbers proved that the predominant rate‐controlling step was intraparticle diffusion. Simultaneously, the adsorption rate was mainly controlled by surface diffusion at lower initial bulk phase concentration and less adsorbent dosage, while pore diffusion played a significant role at higher initial bulk phase concentration and more adsorbent dosage. The temperature had little effect on the diffusion of 4,6‐DMDBT from diesel fuel. The estimated values of pore diffusion coefficient and surface diffusion coefficient were 1.55 × 10−12 m2/s and 5.855 × 10−14 m2/s, respectively. They were independent of adsorbent dosage, initial 4,6‐DMDBT concentration, and temperature, which can provide guidance for fixed‐bed adsorption columns design and process operation.

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“…Finally, the solid phase was removed by centrifugation, rinsed with enough deionized water until no detection of bromide ions by 0.1 M silver nitrate solution, dried at 60 • C for 48 h, activated at 120 • C for 1 h, pulverized in an agate mortar and packed for further use. The characteristics of the resultant adsorbent, hereinafter designated as CTAB-V, has been thoroughly described in our earlier works (Sadeghi Pouya et al, 2015a;Sadeghi Pouya et al, 2015b).…”

Section: Preparation Of Adsorbentmentioning

confidence: 99%

Effect of dispersed hydrophilic silicon dioxide nanoparticles on batch adsorption of benzoic acid from aqueous solution using modified natural vermiculite: An equilibrium study

Pouya

Abolghasemi

Fatoorehchi

et al. 2016

Journal of Applied Research and Technology

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The equilibrium adsorption of benzoic acid from an aqueous medium on a natural vermiculite-based adsorbent was studied in the presence and absence of hydrophilic silicon dioxide nanoparticles in batchwise mode. The adsorbent was prepared through grinding natural vermiculite in a laboratory vibratory disk mill and the surfactant modification of ground vermiculite by cetyltrimethylammonium bromide, subsequently. The equilibrium isotherm in the presence and absence of nanoparticles was experimentally obtained and the equilibrium data were fitted to the Langmuir, Freundlich, Dubinin-Radushkevich and Temkin models. The results indicated that the dispersion of silicon dioxide nanoparticles at optimum concentration in the liquid phase remarkably increases the removal efficiency. Furthermore, it yields a more favorable equilibrium isotherm and changes the compatibility of equilibrium data from the Langmuir and Temkin equations to just the Langmuir equation. A quadratic polynomial model predicting the equilibrium adsorbent capacity in the presence of nanoparticles as a function of the adsorbate and initial nanoparticle concentrations was successfully developed using the response surface methodology based on the rotatable central composite design. A desirability function was used in order to optimize the values of all variables, independent and dependent ones, simultaneously.

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Theoretical and experimental studies of benzoic acid batch adsorption dynamics using vermiculite-based adsorbent

Cited by 25 publications

References 60 publications

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

High Adsorption of Benzoic Acid on Single Walled Carbon Nanotube Bundles

Adsorption diffusion behaviour of 4,6‐DMDBT from diesel fuel

Effect of dispersed hydrophilic silicon dioxide nanoparticles on batch adsorption of benzoic acid from aqueous solution using modified natural vermiculite: An equilibrium study

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