Synthesis and properties of the composite sorbents on the basis of alumosilicates separated from the clay-salt slimes

Abstract

The composite sorbent, including an active inorganic component (alumosilicates derived from claysalt slimes) in the quantity of more than 80 wt % and the polymer binder (polyacrylamide) was obtained. The influence of various factors on its sorption and mechanical properties were studied. It is established that the content of polyacrylamide in the composite sorbent should be in the range of 10–15 wt %. It is shown that quasi-equilibrium of 137Cs in the system “sorbent – solution” is reached within 80 min. The distribution coefficient (Kd) is 2.4 ? 104 cm3/g. The obtained data of kinetic parameters (diffusion coefficient and during sorption half-time) show that the received sorbent can be referred to sorbents with high rate of 137Cs sorption.