Efficient adsorbent for simultaneous removal of Cu(II), Zn(II) and Cr(VI): Kinetic, thermodynamics and mass transfer mechanism

Maheshwari, Utkarsh; Mathesan, Bhuvanesh; Gupta, Suresh

doi:10.1016/j.psep.2015.07.010

Cited by 64 publications

(11 citation statements)

References 64 publications

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“…Some researchers reported an increase [25,26] some reported a decrease [27][28][29] in adsorption capacity depending on the temperature and some [11] reported that the adsorption capacity did not change with changing temperature. As seen in Figure 10, temperature did not have a significant effect on the adsorption capacity in the present study. ]…”

Section: Effect Of Temperaturementioning

confidence: 99%

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Yıldız

2017

Ecological Chemistry and Engineering S

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Abstract:In the work, adsorption of Cu 2+ ions onto almond shell were investigated under different operational conditions. Almond shell was used without any pretreatment prior to the tests. The optimum conditions for adsorption of Cu 2+ ions through almond shell were determined to be; pH 5.0, temperature 20ºC, shaking rate 125 rpm, sorbent dose 0.3 g and initial Cu 2+ ion concentration 50 mg/dm 3 . The equilibrium duration of the system was 60 minutes. The sorption capacities of the sorbents were predicted with the aid of equilibrium and kinetic models. The interactions of peanut shell with metal ions were constituted by SEM, EDX, FT-IR, XRD and AFM. The pseudo-first-order, pseudo-second-order, Weber-Morris, Elovich model and Bangham kinetic models were applied to test the experimental data. The Cu +2 ions adsorption onto almond shell was better defined by the pseudo-second-order kinetic model, for initial pH. The equilibrium data were evaluated using Langmuir, Freundlich, Temkin, D-R and Harkins Jura isotherms. The highest R 2 value in isotherm studies was obtained from Langmiur isotherm (R 2 = 0.98) for the inlet concentration.

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Section: Effect Of Temperaturementioning

confidence: 99%

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Yıldız

2017

Ecological Chemistry and Engineering S

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“…(WHO) and Environmental Protection Agency (EPA) guidelines, the maximum allowable concentration of Cu (II) in drinking water is 1.3 and 2.0 mg L −1 , respectively [11,82,100]. Therefore, the treatment of wastewater containing Cu (II) is crucial in the field of environmental protection [69,86].…”

Section: Introductionmentioning

confidence: 99%

Removal of copper ions from aqueous solution using NaOH-treated rice husk

et al. 2020

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The present study investigates the removal of copper ions (Cu (II)) from aqueous solution using chemically treated rice husk (TRH). The chemical treatment was carried out using NaOH solution and the effect of contact time (tc), adsorbent dosage (Dad), initial Cu (II) concentration ([Cu]i), and temperature (T) on the percentage removals of Cu (II) (%RCu) were investigated. Different analytical techniques (FTIR, SEM, and EDX) were used to confirm the adsorption (ads) of Cu (II) onto the TRH. The ads kinetics was tested against pseudo-first-order (PFO) and pseudo-second-order (PSO) models as well as Langmuir and Freundlich isotherms. Treating RH with NaOH altered the surface and functional groups, and on the surface of RH, the ionic ligands with high electro-attraction to Cu increased and thus improved the removal efficiency. The %RCu decreased by increasing the [Cu]i and increased by increasing the ct, Dad, and T. Up to 97% Cu removal was achieved in ct of 30 min using Dad of 0.3 g [Cu]i of 25 mg L−1 and T = 280 K. The ads of Cu on TRH is endothermic, spontaneous, follows Langmuir isotherms, and exhibited a PSO kinetics. Moreover, the TRH was successfully regenerated and used for further adsorption cycles using 1 M HNO3.

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“…Therefore,the decontamination of waters contaminated with Cr(VI) compounds before their release is an important environmental issue. Because of their simplicity, high performance, large surface areas, great adsorption capacity, presence of functional groups on their surface and also green and easy handling, nano-adsorbents (such as graphene oxide (GO)) have received much attention in wastewater treatment [9][10][11][12][13][14][15] and have attracted a great deal of scientific interest [4,16]. The high performance of GO in the removal of some pollutants (such as Hg 2+ [17] and Cu 2+ [18]) from aqueous solutions has been demonstrated by some researchers.…”

Section: Introductionmentioning

confidence: 99%

Fabrication of magnetic graphene oxide nanocomposites functionalized with a novel chelating ligand for the removal of Cr(VI): Modeling, optimization, and adsorption studies

Sheikhmohammadi¹,

Mohseni²,

Hashemzadeh³

et al. 2019

Desalination and Water Treatment

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In this study, the performance of magnetic graphene oxide (GO-Fe 3 O 4) functionalized with 2-mercaptobenzothiazole (MBT) chelating ligand was investigated as a new adsorbent for the adsorption of Cr(VI) from aqueous solutions. The magnetic graphene oxide functionalized with chelating ligand of the 2-mercaptobenzothiazole (GFM) was freshly synthesized via a two-stage process, and characterized by energy dispersive X-ray (EDAX), Fourier-transform infrared spectroscopy (FTIR), transmission electron microscope (TEM), scanning electron microscope (SEM) images and thermogravimetric analysis (TGA). The composition effect of independent input factors and one dependent output response was investigated using a central composite design under response surface methodology (RSM). The full second-order model indicated a model well-fitted with the experimental data. The optimum operating points giving maximum Cr(VI) removal (94.02) included pH, 6.79; adsorbent dosage, 2.98 g L-1 ; contact time, 118.6 min; and Cr(VI) concentration, 4.41 mg L-1. Based on the reported results, magnetic graphene oxide functionalized with 2-mercaptobenzothiazole (GFM) chelating ligand indicated best fit with the Langmuir model. The kinetic models followed the pseudo-first-order model. The thermodynamic studies indicated that the sorption of Cr(VI) onto GFM was endothermic and spontaneous.

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Efficient adsorbent for simultaneous removal of Cu(II), Zn(II) and Cr(VI): Kinetic, thermodynamics and mass transfer mechanism

Cited by 64 publications

References 64 publications

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Kinetic and Isotherm Analysis of Cu(II) Adsorption onto Almond Shell (Prunus Dulcis)

Removal of copper ions from aqueous solution using NaOH-treated rice husk

Fabrication of magnetic graphene oxide nanocomposites functionalized with a novel chelating ligand for the removal of Cr(VI): Modeling, optimization, and adsorption studies

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