Romana S.,Ustav Pro Hydrodynamiku AV CR |
Marta M.,Vyzkumny Ustav Vodohospodarsky T. G. Masaryka |
Valentina K.,Potsdam Institute for Climate Impact Research
Journal of Hydrology and Hydromechanics | Year: 2010
In the context of discussed global climate change the emphasis is placed mainly on the adaptability of the water management methodology at present time. Therefore a questionnaire inquiry oriented to the perception of the climate change impact and current state of adaptation strategies implementation was carried out and evaluated. The research was realised among the water management experts in six large transboundary basins: Elbe, Rhine, Guadiana, Amudaria, Orange and Nile. The questionnaire was divided into six parts concerning for example: expected climate change impacts, adaptation measures, drivers for development of adaptation strategy, adaptation barriers etc. Responses were evaluated with rating and the dominant answers and lists of priority were established. Results were evaluated looking for overall conclusions in all or almost all regions, as well as conclusions for each region. The main benefit of the research lies in the evaluation based principally on the opinions of policy makers, stakeholders and water managers in the river basins not on the climate scenarios. The outcomes have proved understanding of the climate change impact issue over all six basins, only the approach to adaptation is partly different. The historical development of water management in the basin influences the perception as well.
Cermakova L.,Ustav pro hydrodynamiku AV CR |
Cermakova L.,Charles University |
Pivokonska L.,Ustav pro hydrodynamiku AV CR |
Kopecka I.,Ustav pro hydrodynamiku AV CR |
And 3 more authors.
Chemicke Listy | Year: 2015
The paper deals with adsorption of AOM peptides during water treatment. The adsorption is affected by many circumstances. However, the principal factors are size distribution of the adsorbent pores, pH value of the solution and its ionic strength. For the adsorption of peptides having molecular weight lower than 4 kDa, the most important role play mesopores (d > 2 nm) and micropores (d = 0.8–2 nm). Charge characteristics of AOM functional groups and surface activated carbon functional groups are determined by pH value of the solution. These charge relationships affect prevailing mechanisms of interactions between peptides and the activated carbon surface. The biggest adsorption capacities are reached at weakly acidic region of pH due to an effect of attractive electrostatic forces between the activated carbon surface and AOM peptides. The next factor influencing the AOM adsorption is ionic strength of the solution. Its increasing value can have a positive effect on the adsorption efficiency, but the adsorbent character and pH value of the water to be treated, should be taken into account. © 2015, Czech Society of Chemical Engineering. All rights reserved.