Compound ferrous iron cyanide titanium potassium magnetic ball and preparation method thereof

Abstract

The invention belongs to the technical field of a method for preparing a compound ferrous iron cyanide titanium potassium magnetic ball, and in particular relates to the compound ferrous iron cyanide titanium potassium magnetic ball and a preparation method thereof. The method comprises the following steps of: preparing a magnetic ferroferric oxide silicon dioxide microballoon by using a ferroferric oxide magnetic particle with the grain diameter of 0.3-0.8 microns as a core and using tetraethoxysilane as a silicon source; then preparing a magnetic ferroferric oxide silicon dioxide-titanium oxide spherical particle by taking dichloro oxotitanium as a titanium source; and finally, preparing the compound ferrous iron cyanide titanium potassium magnetic ball by using potassium ferrocyanide as a soaking agent. The method has simple steps and is mild in experiment condition; and the grain diameter of the prepared compound ferrous iron cyanide titanium potassium magnetic ball is 0.05-0.2mm, the saturation capacity of absorbed cesium is 1.0 mmolCs / g-1.4 mmolCs / g dry compound particles; and therefore, the method for preparing the compound ferrous iron cyanide titanium potassium magnetic ball has the advantages that the absorption capacity of the ferrous iron cyanide titanium potassium to the cesium is preserved under the mild condition, the analysis is difficult to carry out, and the absorbed particles are easy to recover; and particulate matter of the absorbed cesium can be transformed to oxide to be conveniently stored.

Description

technical field

[0001] The invention belongs to the technical field of preparation methods of composite magnetic materials, and in particular relates to a composite titanium potassium ferrocyanide magnetic ball and a preparation method thereof. Background technique

[0002] With the development of nuclear power industry, radioactive waste liquid is more and more harmful to the environment. Many radionuclides will migrate to aquatic organisms and various crops in water and soil, thus causing great harm to human survival. Therefore, The safe disposal of radioactive element waste liquid is very important. Cesium (Cs) is a highly pyrogenic fission product with a long half-life. Its removal and recovery research has always been valued by countries all over the world, especially the Fukushima incident in Japan in 2011, which has aroused people's heightened awareness of the safe disposal of radioactive waste liquid. focus on.

[0003] The treatment of cesium is mainly the ion exc...