Ordered mesoporous carbons as effective sorbents for removal of heavy metal ions

Barczak, Mariusz; Michalak, Katarzyna; Gdula, Karolina; Tyszczuk‐Rotko, Katarzyna; Dobrowolski, Ryszard; Dąbrowski, A.

doi:10.1016/j.micromeso.2015.03.010

Cited by 106 publications

(37 citation statements)

References 80 publications

(46 reference statements)

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“…Among these methods, adsorption has been proven to be an effective technique due to its great efficiency and simplicity in operation as well as its incredible versatility (Xu et al 2013). The most commonly used adsorbents for heavy metal removal are activated carbon, alumina, and silica (Barczak et al 2015;Fu and Wang 2011;Karnib et al 2014). But, the relatively high costs significantly limited their application, especially for developing countries and regions (Boujelben et al 2009).…”

Section: Introductionmentioning

confidence: 99%

Removal of heavy metal ions from aqueous solution by zeolite synthesized from fly ash

Chen

Tang

et al. 2015

Environ Sci Pollut Res

193

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Zeolite was synthesized from coal fly ash by a fusion method and was used for the removal of heavy metal ions (Pb(2+), Cd(2+), Cu(2+), Ni(2+), and Mn(2+)) in aqueous solutions. Batch method was employed to study the influential parameters such as adsorbent dosage, pH, and coexisting cations. Adsorption isotherms and kinetics studies were carried out in single-heavy and multiheavy metal systems, respectively. The Langmuir isotherm model fitted to the equilibrium data better than the Freundlich model did, and the kinetics of the adsorption were well described by the pseudo-second-order model, except for Cd(2+) and Ni(2+) ions which were fitted for the pseudo-first-order model in the multiheavy metal system. The maximum adsorption capacity and the distribution coefficients exhibited the same sequence for Pb(2+) > Cu(2+) > Cd(2+) > Ni(2+) > Mn(2+) in both single- and multiheavy metal systems. In the end, the adsorption capacity of zeolite was tested using industrial wastewaters and the results demonstrated that zeolite could be used as an alternative adsorbent for the removal of heavy metal ions from industrial wastewater.

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Section: Introductionmentioning

confidence: 99%

Removal of heavy metal ions from aqueous solution by zeolite synthesized from fly ash

Chen

Tang

et al. 2015

Environ Sci Pollut Res

193

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“…nitric acid, perchloric acid, ammonium persulfate and hydrogen peroxide. Wet oxidation is usually performed at temperatures 20-150°C (Lazaro et al 2007 Wu et al 2010;Deng et al 2010;Moreno-Tovar et al 2014;Tanaka et al 2015;Barczak et al 2015). Often nitric acid is used since its oxidizing properties can be controlled by adjusting the concentration and temperature (Lazaro et al 2007;Bazuła et al 2008;Wu et al 2010;Deng et al 2010).…”

Section: Introductionmentioning

confidence: 99%

“…Hydrogen peroxide can be used to generate surface oxides, but it is very toxic and can also damage the mesostructure of carbon materials (Wu et al 2010). In contrast, acidic ammonium persulfate solution is a gentle and less-toxic oxidant with a good capability of generating surface oxides and without causing obvious damage to the porous structure (Wu et al 2010;Barczak et al 2015). Depending on the type of the oxidising agent used and the conditions of the modification (e.g.…”

Section: Introductionmentioning

confidence: 99%

“…The oxygen functional groups present on the surface of carbon adsorbents are analogous to the typical functional groups met in organic compounds. As a result of the process of oxidation, the sorption capacities of mesoporous carbons (characterised with highly hydrophobic properties) towards esters, amines, functional dyes and heavy metal ions significantly improve (Wu et al 2010;Barczak et al 2015).…”

Section: Introductionmentioning

confidence: 99%

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The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

2015

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Mesoporous carbon of regular structure was subjected to oxidation by ammonium persulfate at 30, 60 or 100°C. The mesostructure and pore evolution were characterised by XRD, TEM, and N 2 sorption techniques. The functional groups present on the surface of the carbon materials were identified by FTIR and thermogravimetric studies. It was established that the micropores and small mesopores could be blocked by the surface oxides attached under mild oxidation. High densities of surface oxygen complexes, especially carboxylic groups, were generated on the surface of mesoporous carbons. All materials obtained were tested for the removal of Auramine-O from aqueous solution. Adsorption experiments were carried out as batch studies at different contact time, pH and initial dye concentration. Removal of this cationic dye in basic solutions was more effective than in acidic solutions. The highest sorption capacity towards Auramine-O was obtained for the carbon sample oxidised by ammonium persulfate solution at 100°C. Fitting equilibrium data to Langmuir and Freundlich isotherms showed that Langmuir model was more suitable to describe the Auramine-O adsorption. The changes in standard enthalpy (DH 0 ), standard entropy (DS 0 ) and Gibbs free energy (DG 0 ) were analysed. Thermodynamic study showed that the adsorption of Auramine-O was a spontaneous and exothermic process.

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“…jak i materiały organiczne, wśród których wymienić należy przede wszystkim węgle aktywne [1, 10,11], a także w mniejszym stopniu aktywowane włókna węglowe, sadze węglowe, molekularne sita węglowe, nanorurki węglowe oraz uporządkowane węgle mezoporowate [12][13][14][15][16]. Niewątpliwie największe perspektywy otwierają się jednak przed węglami aktywnymi, które mogą być wykorzystywane nie tylko jako adsorbenty, ale również jako nośniki katalizatorów lub samodzielne katalizatory, czynniki redukujące [10,11,17] czy też materiały elektrodowe dla nowoczesnych źródeł energii, np.…”

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Physicochemical and Sorption Properties of Activated Carbons Obtained from Citrus Fruit Peels and Low Quality Lignite

Nowicki

Kazmierczak-Razna

Pietrzak

2016

Eng. Prot. Environ.

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Ordered mesoporous carbons as effective sorbents for removal of heavy metal ions

Cited by 106 publications

References 80 publications

Removal of heavy metal ions from aqueous solution by zeolite synthesized from fly ash

Removal of heavy metal ions from aqueous solution by zeolite synthesized from fly ash

The effect of surface modification of mesoporous carbons on Auramine-O dye removal from water

Physicochemical and Sorption Properties of Activated Carbons Obtained from Citrus Fruit Peels and Low Quality Lignite

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