Decontamination and solidification of liquid radioactive waste using natural zeolite

Abstract

This study is based on evaluation of solidification methods for low-level radioactive liquid using natural zeolite. In classical method, LLW is decontaminated using zeolite and after the process spent zeolite becomes radioactive waste. After decontamination process, zeolite waste is solidified using cement, sand and water. In this method; liquid radioactive waste was used instead of water, natural zeolite was used instead of sand/aggregate and cement was used for binding the mixture in solidification process. In this study, leaching properties and strength of the solidified waste form were investigated for both techniques. Effect of temperature on the radionuclide adsorption of the zeolite was determined to optimize the waste solution temperature for the plant scale operations. In addition, the effect of pH on the radionuclide uptake of the zeolite was determined to optimize the waste solution's pH for the plant scale operations. The advantages of this method used for the processing of LLW were discussed in this paper.

Wyzwania i możliwości odzysku w gospodarce odpadami podczas procesów wydobycia i wzbogacania rud zawierających uran i tor – przegląd

“…Considering that these applications are being made, the management of U-waste should be considered more sensitively. Many studies have been performed on the removal of radioactivity from U liquid waste (Osmanlioglu 2006b(Osmanlioglu , 2007(Osmanlioglu , 2015(Osmanlioglu , 2016b(Osmanlioglu , 2018bkam et al 2014). One such example in the context of sulfuric acid U refining is galvanochemical purification, which is a process studied for liquid radioactive waste products.…”

Effects of phase, strain, pressure, vacancy, and doping on the adsorption of metallic radionuclides on monolayer 2H-MoS2

“…To dispose of the radioactive wastewater in nuclear power plants, scientists and engineers developed many dispose methods, including sorption (Avramenko et al 2016), (co) precipitation (Valsala et al 2011), ion exchange (Aleman 2008), solidification (Osmanlioglu 2014), and membrane separation (Sujish et al 2014). Among these methods, sorption is considered as one of the most cost-effective methods for removing radionuclides from radioactive wastewater.…”