Nukleárny seminár - Vesaj Singh (11.3.2026)
v stredu 11.3.2026 o 14:00 v miestnosti F1/364
Pozývame Vás na Nukleárny seminár Katedry jadrovej fyziky a biofyziky FMFI UK, Katedry jadrovej chémie PriF UK, Slovenskej fyzikálnej spoločnosti a Slovenskej nukleárnej spoločnosti
Prednášajúci: M.Sc. Vesaj Singh (Katedra jadrovej chémie, Prírodovedecká fakulta UK)
Názov: Development and Mechanistic Evaluation of Perlite–Alginate–Chitosan Composite Beads for the Removal of 133Ba and 137Cs from Aqueous Systems
Termín: 11.3.2026, 14:00 hod., F1/364 (zasadačka KJFB)
Abstrakt:
The expansion of nuclear technologies has provided significant benefits to society; however, the safe management of radioactive waste remains a critical environmental challenge. Among radionuclides of concern, 133Ba and 137Cs are important due to their radiotoxicity and mobility in aqueous environments. 137Cs is a well-known fission product with a half-life of approximately 30.17 years, while 133Ba (half-life ~10.5 years) is commonly used as a gamma-emitting tracer and represents barium behaviour in radioactive systems. Their gamma emission and solubility enhance the risk of environmental contamination. In this study, Perlite–Alginate–Chitosan composite beads were synthesized and evaluated as a durable and regenerable adsorbent for the removal of 133Ba and 137Cs from aqueous solutions. Batch adsorption experiments were conducted to investigate the influence of contact time, pH, adsorbent dosage, temperature, initial concentration, and competing ions on removal efficiency. The maximum removal efficiency achieved was 97% for 133Ba and 33% for 137Cs under optimized conditions. Adsorption isotherm and kinetic models were applied to elucidate the adsorption mechanism and surface interaction behaviour. Furthermore, regeneration studies over five consecutive cycles demonstrated that the composite material retains its adsorption capacity with only minimal loss, highlighting its potential applicability for radioactive wastewater treatment.