Matusik, Jakub
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nauki o Ziemi i środowisku
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Item type:Article, Access status: Open Access , Competitive sorption of selected anions on modified halloysite(Wydawnictwa AGH, 2014) Prokop, Anna; Matusik, JakubHalloysite is a polytype of kaolinite exhibiting a 1:1 layered structure with the chemical composition of $Al_{4}Si_{4}O_{10}(OH)_{8}$. Synthesis of new materials based on kaolinites has received wide attention recently (e.g. Dedzo et al. 2012).Item type:Article, Access status: Open Access , Preparation and characterization of azobenzene-smectite photoactive mineral nanomaterials(Wydawnictwa AGH, 2015) Koteja, Anna; Matusik, JakubSmectites are 2:1 layered minerals built of one octahedral sheet located between two tetrahedral sheets. The layer charge derived from the isomorphic substitutions in the mineral structure is compensated by the interlayer cations.Item type:Article, Access status: Open Access , Aqueous cadmium removal by hydroxylapatite and fluoroapatite(Wydawnictwa AGH, 2012) Matusik, Jakub; Bajda, Tomasz; Manecki, MaciejReducing the bioavailability of toxic heavy metals in groundwaters and urban soils by phosphate addition is an effective technique described in the literature. It is based on the reaction between metal ions and phosphates and results in the precipitation of metal substituted phosphate phases. The formed phosphates are highly insoluble and thermodynamically stable over almost entire pH and Eh range. In the presented study the efficiency and mechanism of cadmium uptake by synthetic hydroxylapatite and natural fluoroapatite was examined within the pH range of 3-7 for different reaction times (2—1440 hours). The solids after reactions were characterized by XRD and SEM-EDS. Percentage reduction of cadmium concentration in the experiments with fluoroapatite and hydroxylapatite, regardless of pH, did not exceed 17% and 25%, respectively. Cadmium uptake from the solution mainly resulted from the formation of cadmium phosphates and/or Ca-Cd phosphate solid solutions on the apatites surface. The release rate of phosphate ions by hydroxylapatite was relatively high. This promoted crystallization of a large number of small crystals. In turn dissolution of fluoroapatite was slower and thus the formation of large crystals was observed. There was no clear evidence for cadmium-calcium ion-exchange mechanism.Item type:Article, Access status: Open Access , Na-montmorillonite modified with ammonium salts and azobenzene as a photoactive nanomaterial(Wydawnictwa AGH, 2016) Koteja, Anna; Matusik, JakubModification of inorganic solid structures (e.g. minerals) with organic molecules is a constantly developed topic in material sciences.Item type:Article, Access status: Open Access , The kinetics of heavy metals immobilization by modified halloysite(Wydawnictwa AGH, 2014) Maziarz, Paulina; Matusik, JakubHalloysite is a clay mineral, belonging to the kaolinite group. Its structure is composed of stacked 1:1 layers built from octahedral (alumina) and tetrahedral (silica) sheets, linked through hydrogen bonds formed between oxygen atoms of tetrahedral sheet and inner surface OH groups of octahedral sheet.Item type:Article, Access status: Open Access , Improved copper sorption on grafted kaolinites of different structural order(Wydawnictwa AGH, 2014) Koteja, Anna; Matusik, JakubKaolin group minerals exhibit relatively low sorption capacity as the migration of ions and their sorption in the interlayer space is not possible. The ions attraction is limited to the particles faces and edges through surface complexation and ion-exchange mechanisms. The ongoing research on functionalized kaolinites enabled to synthesize new nanomaterials with possible applications in industry and environmental protection.Item type:Article, Access status: Open Access , The influence of alkali concentration and temperature on chemical activation of halloysite(Wydawnictwa AGH, 2016) Maziarz, Paulina; Matusik, JakubThe influence of alkali activation on clay minerals is not thoroughly investigated, particularly in terms of its impact on adsorption possibilities of clay minerals.Item type:Article, Access status: Open Access , A comparative study on the removal of Pb(II), Zn(II), Cd(II) and As(V) by natural, acid activated and calcinated halloysite(Wydawnictwa AGH, 2015) Maziarz, Paulina; Prokop, Anna; Matusik, JakubWith the intensive development of the global industry trace elements like lead, zinc, cadmium and arsenic spread and infiltrate into soil and water, what results in contamination.Item type:Article, Access status: Open Access , Delaminacja i transformacja morfologii minerałów z grupy kaolinitu(2007) Matusik, JakubItem type:Article, Access status: Open Access , Department of Mineralogy, Petrography and Geochemistry(Wydawnictwa AGH, 2016) Matusik, Jakub; Rzepa, Grzegorz
