A novel approach for rice straw agricultural waste utilization: Synthesis of solid aluminosilicate matrices for cesium immobilization

• DOI: 10.1016/j.net.2022.04.005
• Publication Date: 2022-04-09T00:33:32Z
• Authors: A.E. Panasenko; O.O. Shichalin; S.B. Yarusova; A.I. Ivanets; A.A. Belov; A.N. Dran'kov; S.A. Azon; A.N. Fedorets; I. Yu Buravlev; V. Yu Mayorov; D. Kh Shlyk; A.A. Buravleva; E.B. Merkulov; N.V. Zarubina; E.K. Papynov
• Keywords: Spark Plasma Sintering

A new approach to the use of rice straw as a difficult-to-recycle agricultural waste was proposed. Potassium aluminosilicate obtained by spark plasma sintering an effective material for subsequent immobilization 137Cs into solid-state matrix. The sorption properties potassium from aqueous solutions were studied. effect synthesis temperature on phase composition, microstructure, and rate cesium leaching samples at 800–1000 °C pressure 25 MPa investigated. It shown that positive dynamics compaction characteristic glass ceramics throughout sintering. Glass RS-(K,Cs)AlSi3O8 SPS method 1000 5 min characterized high density ∼2.62 g/cm3, Vickers hardness ∼ 2.1 GPa, compressive strength ∼231.3 ions ∼1.37 × 10−7 g cm−2·day−1. proposed makes it possible safe dispose reduce emissions atmosphere microdisperse amorphous silica, which is formed during its combustion causes respiratory diseases, including cancer. In addition, perspective solve problem recycling long-lived radionuclides operation nuclear power plants matrices.