Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Use of clinoptilolite for the immobilization of heavy metal ions and preparation of autoclaved building composites
The work presents the results of application of natural clinoptilolite for immobilization of heavy metal cations (Ag(+), Pb(2+), Cd(2+) and Cr(3+)) from aqueous solutions and uses zeolite to prepare autoclaved building composites. Sorption has been conducted on sodium form of natural clinoptilolite originated from Poland. Clinoptilolite (sodium form containing heavy metal cations) has been applied to obtain new building materials which have good physical properties. Samples produced by autoclaving process showed relatively low bulk density (about 1.35 g/cm3). The compressive strength depended on the amount of CaO in the initial mixture. Its maximum value was about 40 MPa. The influence of heavy metal cations on the compressive strength values was insignificant (except for the Cr(3+) ions). However, all the cations modified the microstructure and the ordered state of C-S-H phase. Efficiency of Ag(+), Cd(2+) and Pb(2+) ions immobilization on the mineral matrix was shown. In the work, results of IR (infrared) spectroscopy, AAS (atomic absorption spectroscopy) studies, X-ray diffraction analysis, SEM (scanning electron microscopy) observations and technological investigations are presented.
Use of clinoptilolite for the immobilization of heavy metal ions and preparation of autoclaved building composites
The work presents the results of application of natural clinoptilolite for immobilization of heavy metal cations (Ag(+), Pb(2+), Cd(2+) and Cr(3+)) from aqueous solutions and uses zeolite to prepare autoclaved building composites. Sorption has been conducted on sodium form of natural clinoptilolite originated from Poland. Clinoptilolite (sodium form containing heavy metal cations) has been applied to obtain new building materials which have good physical properties. Samples produced by autoclaving process showed relatively low bulk density (about 1.35 g/cm3). The compressive strength depended on the amount of CaO in the initial mixture. Its maximum value was about 40 MPa. The influence of heavy metal cations on the compressive strength values was insignificant (except for the Cr(3+) ions). However, all the cations modified the microstructure and the ordered state of C-S-H phase. Efficiency of Ag(+), Cd(2+) and Pb(2+) ions immobilization on the mineral matrix was shown. In the work, results of IR (infrared) spectroscopy, AAS (atomic absorption spectroscopy) studies, X-ray diffraction analysis, SEM (scanning electron microscopy) observations and technological investigations are presented.
Use of clinoptilolite for the immobilization of heavy metal ions and preparation of autoclaved building composites
Mozgawa, W. (Autor:in) / Krol, M. (Autor:in) / Pichor, W. (Autor:in)
Journal of Hazardous Materials ; 168 ; 1482-1489
2009
8 Seiten, 9 Bilder, 1 Tabelle, 29 Quellen
Aufsatz (Zeitschrift)
Englisch
Autoklav-Verfahren , Blei , Cadmium , Chrom , Silber , Wasserreinigung , Zeolith , Baustoff , Schüttdichte , Druckfestigkeit , Spektroskopie , Schwermetalle , Immobilisation
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