Effect of the solid pore size on the structure of polymer film at the metal oxide/polyacrylic acid solution interface – Temperature impact

Wiśniewska, Małgorzata; Nosal‐Wiercińska, Agnieszka; Dąbrowska, Iwona; Szewczuk-Karpisz, Katarzyna

doi:10.1016/j.micromeso.2013.03.032

Cited by 36 publications

(12 citation statements)

References 26 publications

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“…In such a case, solid surface modification is necessary. 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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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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“…Incessant progress in this field stimulates the search for new and effective but first of all low-cost adsorbents. From among the various materials used for this purpose (Goscianska et al 2013;Wiśniewska et al 2007Wiśniewska et al , 2013Wiśniewska et al , 2014Kierys et al 2013;Wiśniewska 2010Wiśniewska , 2012Krysztafkiewicz et al 2002;Thomas and Syres 2012;De Smedt et al 2015;Qian et al 2015) the most popular and promising are the carbonaceous sorbents, especially activated carbons (Jiang et al 2015;Deng et al 2015;Sharma and Upadhyay 2009;Goscianska and Pietrzak 2015;Jiang and Chen 2011). Such materials could be prepared in a simple way by physical or chemical activation of variety of organic substances, including wood (Wang et al 2009;Nowicki et al 2015a), peat (Khadiran et al 2015), fossil coals (Nowicki and Pietrzak 2011;Maroto-Valer et al 2005;Teng et al 1998) as well as many biodegradable (Karagöz et al 2008;Soleimani and Kaghazchi 2008;Kazmierczak et al 2013Kazmierczak et al , 2015Nowicki et al 2015b) and industrial waste (Nakagawa et al 2003;Hofman and Pietrzak 2011;Nowicki et al 2013;Lin and Teng 2002).…”

Section: Introductionmentioning

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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“…Additionally, PAA macromolecules with lower molecular weight (i.e., 2000 Da) can adsorb inside the solid pores (of mean diameter 2.26 nm) [36]. The evidence of this is slightly higher adsorption at pH 3 of PAA 2000 Da coils in comparison to the PAA 240,000 Da chains (Fig.…”

Section: Resultsmentioning

confidence: 99%

Nanostructure of Poly(Acrylic Acid) Adsorption Layer on the Surface of Activated Carbon Obtained from Residue After Supercritical Extraction of Hops

et al. 2017

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The nanostructure of poly(acrylic acid) (PAA) adsorption layer on the surface of mesoporous-activated carbon HPA obtained by physical activation of residue after supercritical extraction of hops was characterized. This characterization has been done based on the analysis of determination of adsorbed polymer amount, surface charge density, and zeta potential of solid particles (without and in the PAA presence). The SEM, thermogravimetric, FTIR, and MS techniques have allowed one to examine the solid surface morphology and specify different kinds of HPA surface groups. The effects of solution pH, as well as polymer molecular weight and concentration, were studied. The obtained results indicated that the highest adsorption on the activated carbon surface was exhibited by PAA with lower molecular weight (i.e., 2000 Da) at pH 3. Under such conditions, polymeric adsorption layer is composed of nanosized PAA coils (slightly negatively charged) which are densely packed on the positive surface of HPA. Additionally, the adsorption of polymeric macromolecules into solid pores is possible.

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Effect of the solid pore size on the structure of polymer film at the metal oxide/polyacrylic acid solution interface – Temperature impact

Cited by 36 publications

References 26 publications

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

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

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

Nanostructure of Poly(Acrylic Acid) Adsorption Layer on the Surface of Activated Carbon Obtained from Residue After Supercritical Extraction of Hops

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