ADSORPTION PROPERTIES OF WASTE LIGNOCELLULOSIC MATERIALS PRODUCED IN REPROCESSING OF WHEAT STRAW AND MAIZE STALKS BIOMASS
Temenuzhka Hr. Radoykova, Sonia V. Dimitrova, Katerina I. Aleksieva, Sanchi K. Nenkova, Ivo V. Valchev, Dimitar R. Mehandjiev
Strony: 190-201
Opublikowano: 1 Jan 2013
Wyświetlenia: 266
Pobrania: 19
Streszczenie: The increase of the interest to bio-ethanol production from vegetal raw materials places the question for utilization of the waste hydrolyzed lignin containing some quantity of cellulose. One possibility to solve this problem is clarification of the potential to use such materials as adsorbents of metal ions, other elements and organic compounds from water solutions with the purpose of purifying waste and natural waters. The large internal surface of the lignocellulosic material and availability of different functional groups that could play the role of adsorption centers suggests such possibility. 2+ There is investigated the adsorption of Сu -ions from samples of hydrolyzed lignin (HL) and alkaline treated hydrolyzed lignin (ААHL), obtained from wheat straw and maize stalks. The adsorption mechanism, adsorption centers, specific surface and the potential for practical application of these materials are examined by BET analysis, IR-spectroscopy, EPR and TG-DSC analyses. It is found out 2+ that the adsorption isotherm of Сu -ions on the examined samples is of Langmuir type, the parameters in Langmuir equation depending on the initial material and the respective treatment. The 2+ EPR spectra show that Сu -ions orient to the oxygen ions and form tetrahedral complex. 2+
Słowa kluczowe: adsorption, Сu, mechanism, waste hydrolyzed lignocellulosic materials, alkaline
Cytowanie artykułu: Temenuzhka Hr. Radoykova, Sonia V. Dimitrova, Katerina I. Aleksieva, Sanchi K. Nenkova, Ivo V. Valchev, Dimitar R. Mehandjiev. ADSORPTION PROPERTIES OF WASTE LIGNOCELLULOSIC MATERIALS PRODUCED IN REPROCESSING OF WHEAT STRAW AND MAIZE STALKS BIOMASS. Journal of International Scientific Publications: Materials, Methods & Technologies 7, 190-201 (2013). https://www.scientific-publications.net/en/article/1003102/
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