Tritium tritiated water within atmosphere-plant-soil-hydrosphere systemic ensemble

The work has as purpose to highlight tritium/tritiated water participation in processes within atmosphere-plant-soil-hydrosphere system. As hydrogen's isotope, tritium is fully found in atmosphere-hydrosphere and vegetation-environment-human, and for that reason it has to be supervised, monitored, although it has a small radiotoxicity. This work is structured on the following problems: - tritium and tritiated water sources; - tritium/tritiated water involvement in natural physico-chemical and biologic processes; - tritium cycle within soil-plant-atmosphere-hydrosphere system; - tritium activity measurement in atmosphere and hydrosphere and tritium monitoring. (authors)