Adsorption process of methyl orange dye onto mesoporous carbon material–kinetic and thermodynamic studies

Mohammadi, Narmin; Khani, Hadi; Gupta, Vinod Kumar; Amereh, Ehsanollah; Agarwal, Shilpi

doi:10.1016/j.jcis.2011.06.067

Cited by 759 publications

(233 citation statements)

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“…The conventional method for removing these toxic metal ions from aqueous solution is by chemical precipitation and the major drawback of this method is the generation of huge amount of chemical sludge (Gupta et al 1997(Gupta et al , 2011a(Gupta et al , b, 2012Mohammadi et al 2011;Ahmaruzzaman and Gupta 2011). Adsorption is a simple treatment method for removing metal ions in wastewater, and activated carbon is a powerful adsorbent that is commonly used in industrial wastewater treatment plant (Saleh and Gupta 2011;Saleh and Gupta 2012a, b;Karthikeyan et al 2012;Mittal et al 2009aMittal et al , b, 2010Mittal et al , 2012Wang et al 2006Wang et al , 2009.…”

Section: Introductionmentioning

confidence: 99%

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Manjuladevi¹,

Anitha²,

Manonmani³

2018

Appl Water Sci

115

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The adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II), ions from aqueous solutions by Cucumis melo peel-activated carbon was investigated under laboratory conditions to assess its potential in removing metal ions. The adsorption behavior of metal ions onto CMAC was analyzed with Elovich, intra-particle diffusion rate equations and pseudo-first-order model. The rate constant of Elovich and intra-particle diffusion on CMAC increased in the sequence of Cr(VI) > Ni(II) > Cd(II) > Pb(II). According to the regression coefficients, it was observed that the kinetic adsorption data can fit better by the pseudo-first-order model compared to the second-order Lagergren's model with R 2 > 0.957. The maximum adsorption of metal ions onto the CMAC was found to be 97.95% for Chromium(VI), 98.78% for Ni(II), 98.55% for Pb(II) and 97.96% for Cd(II) at CMAC dose of 250 mg. The adsorption capacities followed the sequence Ni(II) ≈ Pb(II) > Cr(VI) ≈ Cd(II) and Ni(II) > Pb(II) > Cd(II) > Cr(VI). The optimum adsorption conditions selected were adsorbent dosage of 250 mg, pH of 3.0 for Cr(VI) and 6.0 for Ni(II), Cd(II) and Pb(II), adsorption concentration of 250 mg/L and contact time of 180.

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Section: Introductionmentioning

confidence: 99%

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Manjuladevi¹,

Anitha²,

Manonmani³

2018

Appl Water Sci

115

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“…However, other than the adsorption techniques, these methods have either high costs and/ or are technically complicated [14]. The adsorption method is highly preferable due to its low cost consumption, easy operation, higher efficiency, insensitivity to toxic materials and versatility [1,13,[15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Adsorption capability of activated carbon synthesized from coconut shell

Islam¹,

Ang²,

Gharehkhani³

et al. 2016

Carbon letters

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Activated carbon was synthesized from coconut shells. The Brunauer, Emmett and Teller surface area of the synthesized activated carbon was found to be 1640 m 2 /g with a pore volume of 1.032 cm 3 /g. The average pore diameter of the activated carbon was found to be 2.52 nm. By applying the size-strain plot method to the X-ray diffraction data, the crystallite size and the crystal strain was determined to be 42.46 nm and 0.000489897, respectively, which indicate a perfect crystallite structure. The field emission scanning electron microscopy image showed the presence of well-developed pores on the surface of the activated carbon. The presence of important functional groups was shown by the Fourier transform infrared spectroscopy spectrum. The adsorption of methyl orange onto the activated carbon reached 100% after 12 min. Kinetic analysis indicated that the adsorption of methyl orange solution by the activated carbon followed a pseudo-second-order kinetic mechanism (R 2 > 0.995). Therefore, the results show that the produced activated carbon can be used as a proper adsorbent for dye containing effluents.

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“…Before evaluating the catalytic activity, it is important to analyse the adsorption of the two compounds since this may interfere in the degradation process. It is well-known that some materials, particularly when nanostructured, have a strong physical adsorption of pollutants, such as 4-nitrophenol and methylene blue, as a consequence of the surface affinity [61][62][63][64][65][66][67][68][69][70]. Consequently, the absorbance of various solutions of each pollutant (without the presence of sodium borohydride) was measured before and after 24 and 48 h posteriorly to the addition of the NWs (either compact or mesoporous), both in silent mode or in the presence of an external rotatory magnetic field (~400 Oe and 1200 rpm).…”

Section: Copt Nanowiresmentioning

confidence: 99%

Magnetically-actuated mesoporous nanowires for enhanced heterogeneous catalysis

Serrà

Grau

Gimbert‐Suriñach

et al. 2017

Applied Catalysis B: Environmental

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We study the optimization of the catalytic properties of entirely magnetic CoPt compact and mesoporous nanowires of different diameters (25 -200 nm) by using magnetic actuation. The nanowires are a single-entity, robust, magnetic-catalyst with a huge catalytically-active surface area.We show that apart from conventional parameters, like the size and morphology of the nanowires, other 2 factors can be optimized to enhance their catalytic activity. In particular, given the magnetic character of the nanowires, rotating magnetic fields are a very powerful approach to boost the performance of the catalyst. In particular, the magnetic field induces them to act as nano-stirrers, improving the local flow of material towards the active sites of the catalyst. We demonstrate the versatility of the procedure by optimizing (i) the degradation of different types of pollutants (4-nitrophenol and methylene blue) and (ii) hydrogen production. For example, by using as little as 0.1 mg mL -1 of 25 nm wide CoPt mesoporous nanowires (with 3 nm pore size) as catalysts, kinetic normalized constants knor as high as 20667 and 21750 s -1 g -1 for 4-nitrophenol and methylene blue reduction, respectively, are obtained. In addition, activity values for hydrogen production from borohydride are as high as 25.0 L H2 g -1 min -1 , even at room temperature. These values outperform any current state-of-the-art proposed catalysis strategies for water remediation reactions by at least 10-times and are superior to most advanced approaches to generate hydrogen from borohydride. The recyclability of the nanowires together with the simplicity of the synthetic method makes this approach (using not only CoPt, but also other mesoporous magnetic catalysts) very appealing for very diverse types of catalytic applications. Graphical AbstractHighlights  Magnetic actuation of purely magnetic mesoporous nanowires (NWs) is revealed as a novel and efficient catalysis procedure in reactions of heterogeneous catalysis in environmental and energy fields. Mesoporous CoPt NWs are simultaneously effective catalysts itself and the stirring device, using magnetic fields, to catalyse reactions in solution. The procedure allows ultra-fast degradation of different types of pollutants. 3 The NWs show very high effectivity for hydrogen generation (25.0 L H2 g -1 min -1 ) by catalysing the hydrolysis of sodium borohydride using magnetic actuation.

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Adsorption process of methyl orange dye onto mesoporous carbon material–kinetic and thermodynamic studies

Cited by 759 publications

References 58 publications

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Kinetic study on adsorption of Cr(VI), Ni(II), Cd(II) and Pb(II) ions from aqueous solutions using activated carbon prepared from Cucumis melo peel

Adsorption capability of activated carbon synthesized from coconut shell

Magnetically-actuated mesoporous nanowires for enhanced heterogeneous catalysis

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