Hydrogen sulphide removal on carbonaceous adsorbents prepared from coffee industry waste materials

Nowicki, Piotr; Skibiszewska, Paulina; Pietrzak, Robert

doi:10.1016/j.cej.2014.03.052

Cited by 72 publications

(23 citation statements)

References 23 publications

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“…The main premises in favor of undertaking the adsorption study toward gas pollutants of acidic nature were the high content of mineral substance in the activated carbons structure as well as the presence of a high number of basic surface functional groups, which, according to previous literature reports, have a positive impact on the effectiveness of removal of this type of pollution (Yuan and Bandosz 2007;Feng et al 2005;Nowicki et al 2013Nowicki et al , 2014Kante et al 2012). To verify this supposition, all the materials prepared were subjected to adsorption tests in four variants.…”

Section: Sorption Abilities Of the Activated Carbons Toward Nitrogen mentioning

confidence: 99%

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Nowicki

2015

Adsorption

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A series of new carbonaceous adsorbents has been obtained by means of direct and physical activation of Polish brown coal, characterised by high mineral matter content. The influence of activation procedure on the porous structure development, acidic and basic surface groups generation as well as the sorptive properties of the adsorbents prepared toward liquid and gas pollutants was tested. Additionally the effect of mineral matter presence on the physicochemical and sorption properties of materials prepared was studied. The final products were micro/mesoporous activated carbons of medium developed surface area ranging from 407 to 674 m 2 /g, showing strongly basic or intermediate acidic-basic character of the surface. The results obtained during this study showed that direct and physical activation of low quality brown coal led to activated carbons with very good sorption capacity both toward gas contamination of acidic character (especially nitrogen dioxide) as well as toward methylene blue and inorganic pollutants of molecules of size similar to that of iodine molecules. It was also proved that demineralization of prepared activated carbons by hydrochloric acid significantly reduced their ability to toxic gases sorption, but simultaneously increased the efficiency of removing impurities from the liquid phase.

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Section: Sorption Abilities Of the Activated Carbons Toward Nitrogen mentioning

confidence: 99%

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Nowicki

2015

Adsorption

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“…One of the most important measures aimed at protection of the natural environment is restriction of emission of pollutants (Emami and Azizian 2014;Nowicki et al 2014;Pietrzak and Bandosz 2007;Tyszczuk-Rotko et al 2014;Wiśniewska 2012;Szewczuk-Karpisz 2013;Nosal-Wiercińska et al 2015). One of the most effective methods for elimination of pollutants is their adsorption by activated carbons (Bansal and Goyal 2005;Guo et al 2013;Nowicki et al 2013).…”

Section: Introductionmentioning

confidence: 99%

Removal of NO2 by carbonaceous adsorbents obtained from residue after supercritical extraction of marigold

2015

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Carbonaceous adsorbents were obtained from the residue after supercritical extraction of marigold subjected to physical activation and used as nitrogen dioxide and iodine adsorbents. The effect of carbonisation and activation temperature on the textural parameters, acidbase character of the surface and sorption properties of the activated carbons was tested. The materials obtained were activated carbons of low-developed surface area varying from 2 to 206 m 2 /g, showing clearly basic character of the surface. The results proved that proper selection of the carbonisation and activation procedure of the residue after supercritical extraction of marigold permitted obtaining carbonaceous adsorbents with good capacity toward liquid as well as gas inorganic pollutants. The effectiveness of NO 2 removal was found to depend to large extent on the conditions of adsorption. The preliminary wetting of the adsorbent bed was shown to significantly increase the amount of pollutants removed.

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“…Of great variety of techniques; plasma modification (Kuraica et al 2003;Punga and Borcia 2013), adsorption of different low-and high-molecular compounds (Chibowski et al 2010;Nosal-Wiercińska 2012, 2013Wiśniewska et al 2013a;Nosal-Wiercińska 2014) and synthesis of mixed oxides (Maliyekkal et al 2006;Wu et al 2010) acquired the most significant importance. Appropriate modification leads to obtaining solids of the properties desired in various ecological and technological processes (Kaźmierczak et al 2013;Nowicki et al 2014Nowicki et al , 2015a.…”

Section: Introductionmentioning

confidence: 99%

Impact of poly(vinyl alcohol) adsorption on the surface characteristics of mixed oxide Mn x O y –SiO2

et al. 2015

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The poly(vinyl alcohol) (PVA) influence on the adsorption and electrokinetic properties of the mixed oxide Mn x O y -SiO 2 /polymer solution system was examined. Three oxides differing with the Mn x O y contents were applied (0.2; 1 and 3 mmol/g SiO 2 , respectively). The PVA with the molecular weight 100 kDa was characterized with the acetate groups content equal to 14 %. Adsorption, solid surface charge and zeta potential measurements were made as a function of solution pH (3-10). The obtained results showed that the PVA adsorption amount strongly depends on not only the solution pH, but also manganese oxide content on the mixed oxide surface. The higher solution pH value (or Mn x O y content) is, the higher polymer adsorption is obtained. The PVA addition to the solid suspension causes minimal changes of the mixed oxide surface charge density, whereas the zeta potential of solid particles increases significantly in the polymer presence.

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Hydrogen sulphide removal on carbonaceous adsorbents prepared from coffee industry waste materials

Cited by 72 publications

References 23 publications

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

The effect of mineral matter on the physicochemical and sorption properties of brown coal-based activated carbons

Removal of NO2 by carbonaceous adsorbents obtained from residue after supercritical extraction of marigold

Impact of poly(vinyl alcohol) adsorption on the surface characteristics of mixed oxide Mn x O y –SiO2

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