02410nab a2200265 i 4500 acta24845 20220727125750.0 161017s1997 hu o 0|| eng d 0365-8066 SZTE Egyetemi Kiadványok Repozitórium hun eng Kiss Andrea N. Effects of copper-adsorption on the line-profile of first basal reflection of montmorillonite [elektronikus dokumentum] / Kiss Andrea N. University of Szeged, Department of Mineralogy, Geochemistry and Petrology Szeged 1997 25-36 Acta mineralogica-petrographica 38 Montmorillonite containing mostly Ca as interlayer cation was used for examining the effects of coppercomplex forming and adsorption on the surface of montmorillonite. Exchangeable cations were replaced with ammonium (NH4+ ) and sodium (Na+ ) ions, thus getting monoionic montmorillonite-forms. Copper sorption on mineral surface may include several processes with different characteristics. In case óf montmorillonite ionexchange in the interlayer region and complexation on the surface hydroxyl groups can be taken into account. The Cu-uptake analysed by Langmuir's adsorption isotherm is the sum of these metal binding reactions. Starting pH was 4.5 and equilibrium pH was observed. Different concentrations of solutions of CuSOj from 0 to 1400 ppm were used. The place and profile of X-ray diffraction basal reflection d(xn of montmorillonite is very characteristic and depends on the features and amount of adsorbed cation and water: As to the X-ray diffraction line-profile analysis, in the function of adsorbed amount of copper a significant change occured in crystallite size (size of domains coherently scatter X-rays) and degree of deformation even in half-width of the first basal reflection. Our result is that half-width (signed as SmC) does not but the other two variables does indicate the adsorptional process well and their variance correlate with on the adsorption isotherms. Természettudományok Föld- és kapcsolódó környezettudományok Kőzettan, Ásványtan, Földtan Tóth Mária aut Takács Mónika aut Morvai Balázs aut Wieszt Zoltán aut http://acta.bibl.u-szeged.hu/24845/1/mineralogica_038_025-036.pdf Dokumentum-elérés