|
|
Diel variations of selected elements in arsenic-rich stream at the Mokrsko
Nováková, Barbara ; Drahota, Petr (advisor) ; Skřivan, Petr (referee)
The filtration and ultrafiltration experiment was applied on the stream water at the Mokrsko gold deposit and the results revealed that most of the elements were in the dissolved form and the 0,45 or 0,1 m filters could be used. During two 24-h field experiments, water samples were collected at 1-h intervals in order to prove the diel changes in the concentration and speciation of several trace elements. The determination of sorption processes at the surface of or within the veneer of biofilm has been determined by collecting natural and artificial priphyton. The results showed regular diel changes of As, Sb and Mo with highest concentrations occurring after the moon and the lowest concentrations in the early morning. The dissolved concentrations of other elements are conservative or their values were closed to their detection limits. The diel cycles are caused by changes in adsorption/desorption equilibria induced by diel cycles of temperature. The samples of biofilm revealed increased concentrations of the elements under the study and their diel variation were significant (approximatelly 35-96%); however, biofilm-controlled diel cycles of dissolved concentrations have not been proved.
|
|
|
Diel variations of selected elements in arsenic-rich stream at the Mokrsko
Nováková, Barbara ; Drahota, Petr (advisor) ; Skřivan, Petr (referee)
The filtration and ultrafiltration experiment was applied on the stream water at the Mokrsko gold deposit and the results revealed that most of the elements were in the dissolved form and the 0,45 or 0,1 m filters could be used. During two 24-h field experiments, water samples were collected at 1-h intervals in order to prove the diel changes in the concentration and speciation of several trace elements. The determination of sorption processes at the surface of or within the veneer of biofilm has been determined by collecting natural and artificial priphyton. The results showed regular diel changes of As, Sb and Mo with highest concentrations occurring after the moon and the lowest concentrations in the early morning. The dissolved concentrations of other elements are conservative or their values were closed to their detection limits. The diel cycles are caused by changes in adsorption/desorption equilibria induced by diel cycles of temperature. The samples of biofilm revealed increased concentrations of the elements under the study and their diel variation were significant (approximatelly 35-96%); however, biofilm-controlled diel cycles of dissolved concentrations have not been proved.
|
|
| |
|
| |
|
| |
|
|
Collection and analysis of data from four voltage probes, SP-47 in the gallery Josef at Mokrsko within the the project MPO FR-TI3/325
Staš, Lubomír ; Souček, Kamil ; Nohejl, Zdeněk ; Kaláb, Tomáš ; Rutar, Tomáš
Text, including tables, graphs and images is a comprehensive annual report to the Treaty on the work of 823/24/10 data collection and evaluation of 4 pieces voltage probes, SP-47 in the gallery Josef at Mokrsko. It contains the results of the evaluation of the measurements of voltage changes in test wells in the immediate vicinity of the borehole stress - thermal sources in solid exploration adit SP-47 in Josef. All measurements were obtained using a strain gauge measuring the conical heads, specially manufactured and installed here for this purpose. Measurements are carried out within the project MPO-TIP FR-TI 3/325 - The importance of the thermal load of rocks - perspectives underground storage of thermal energy.
|
guest ::
