|
|
Sorption of charged organic compounds on humic acids
Krist, Tomáš ; Doskočil, Leoš (referee) ; Enev, Vojtěch (advisor)
Bachelor thesis deals with a sorption properties and physical-chemical characterization of humic acids before and after the adsorption. Sorption experiments with a methylene blue and a rhodamin 6G were performed. Adsorption isotherms were obtain via UV/VIS spectrometry. The Langmuir isotherm was used to evaluate the experimental data. Standard of HA isolated from Leonardite was characterized by an elemental and thermogravimetric analysis, by a Fourier-transform infrared spectroscopy, a surface area analysis and also by a potentiometric titration.
|
|
|
Isolation and fractionation methods for determination of humic substances content in Leonardite
Lišková, Kateřina ; Kalina, Michal (referee) ; Enev, Vojtěch (advisor)
The main aim of this thesis was to isolate humic substances (HA and FA) from the natural sample of Leonardite, to characterize their structure and physical and chemical properties. Among other things, the humic acid standard supplied by IHSS, isolated from Leonardite, originally from Dakota, USA, was also studied. The following thermal and spectrometric methods were used to characterize the samples of isolated humic substances: thermogravimetric analysis (TGA), elemental analysis (EA), ultraviolet-visible spectrometry (UV / Vis) and infrared spectrometry with Fourier transformation (FTIR). The atomic ratios were determined from the results of the elemental analysis. Absorption coefficients were calculated from the measured UV/Vis spectra and were used for the physicochemical characterization of these biocolloid compounds. The measured infrared spectra were used to identify the individual functional groups.
|
|
|
Sorption of charged organic compounds on humic acids
Krist, Tomáš ; Doskočil, Leoš (referee) ; Enev, Vojtěch (advisor)
Bachelor thesis deals with a sorption properties and physical-chemical characterization of humic acids before and after the adsorption. Sorption experiments with a methylene blue and a rhodamin 6G were performed. Adsorption isotherms were obtain via UV/VIS spectrometry. The Langmuir isotherm was used to evaluate the experimental data. Standard of HA isolated from Leonardite was characterized by an elemental and thermogravimetric analysis, by a Fourier-transform infrared spectroscopy, a surface area analysis and also by a potentiometric titration.
|
|
|
Isolation and fractionation methods for determination of humic substances content in Leonardite
Lišková, Kateřina ; Kalina, Michal (referee) ; Enev, Vojtěch (advisor)
The main aim of this thesis was to isolate humic substances (HA and FA) from the natural sample of Leonardite, to characterize their structure and physical and chemical properties. Among other things, the humic acid standard supplied by IHSS, isolated from Leonardite, originally from Dakota, USA, was also studied. The following thermal and spectrometric methods were used to characterize the samples of isolated humic substances: thermogravimetric analysis (TGA), elemental analysis (EA), ultraviolet-visible spectrometry (UV / Vis) and infrared spectrometry with Fourier transformation (FTIR). The atomic ratios were determined from the results of the elemental analysis. Absorption coefficients were calculated from the measured UV/Vis spectra and were used for the physicochemical characterization of these biocolloid compounds. The measured infrared spectra were used to identify the individual functional groups.
|
guest ::
