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Climate change or precursor emissions - which of these will be the major player in future ground-level ozone concentrations?
Tremaskina, Anastasiia ; Hůnová, Iva (advisor) ; Matoušková, Leona (referee)
This thesis examines the reasons for potential future outcomes as well as the evolution of future ground-level O3 concentrations. Ground-level O3 is primarily formed by the reaction of precursor emissions, such as nitrogen oxides (NOx) and volatile organic compounds (VOCs), in the presence of solar radiation and warm temperatures. Transport, industrial operations, and energy production are the primary human activities that produce these emissions. Climate change, on the other hand, also has an impact on ground-level O3 concentrations by modifying the atmospheric conditions that promote O3 generation. The frequency and length of high O3 occurrences, for instance, may increase with increasing temperatures and changes in atmospheric circulation patterns, but drought conditions may decrease plant ability to absorb O3 and other pollutants. Additionally, precursor emissions can potentially be impacted by climate change. For instance, rising temperatures may cause plants to produce more biogenic VOCs, and shifting rainfall patterns may have an impact on soil NOx emission rates. Therefore, both precursor emissions and climate change must be considered and addressed in order to correctly anticipate future ground-level O3 concentrations. The work covers the results of previous studies on precursor emissions...
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Phosphorus recycling - need or urgency
Holba, Marek ; Došek, M. ; Škvoran, O. ; Matysíková, J. ; Plotěný, K. ; Maršálek, Blahoslav
Phosphate policy is tightly connected with effective solutions in agriculture, but also with its removal from water environment where excessive concentration of phosphorus is not welcomed since it causes water bloom and worsening og surface water quality. Phosphate ores will be depleted soon and therefore recacling technologies should be introduced into practice in near future. Struvite - slow-release fertilizer seems to be good commodity for farmers. Struvite is usually responsible for clogged pipes in the wastewater treatment area. Therefore, several technologies of its recycling is recently being developed, esp. from reject water stream. Struvite crystallization, its production control and scale-up of technology from lab-scale through pilot-sclae to full-scale is technological challenge in the near future.
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