The Effect of Sitinakite Crystallinity Degree and Textural Characteristics on Its Sorption Properties

Abstract

Titanosilicate with the structure of sitinakite of different degree of crystallinity was synthesized hydrothermally. Wastes of fluoride enrichment of leucoxene (titanium) ores of the Yaregskoye deposit (Russia, Komi Republic) were used as the initial precursor. The synthesized titanosilicate samples were characterized using X-ray diffractometry, IR spectroscopy, and low-temperature sorption-desorption of nitrogen. The regularities of sorption extraction of stable cations Sr2+, Ba2+, Cs+ on titanosilicate depending on the sorption temperature were studied. The highly crystalline titanosilicate was characterized by the highest sorption activity; its sorption capacity was 80 mg/g for Sr2 +, 113 mg/g for Ba2+ and 170 mg/g for Cs+. High sorption properties with respect to stable cations show that the synthesized titanosilicate can be used as an inexpensive and effective sorbent for extracting radioactive isotopes of Sr, Cs, Ba.