Sorption of cesium by aluminosilicate sorbents from rice straw

Fourth interdisciplinary scientific forum with international participation "New materials and promising technologies"

Yarusova, S.B.^1^2 ; Panasenko, A.E.^1^3 ; Zemnukhova, L.A.^1^3 ; Gordienko, P.S.^1 ; Arefieva, O.D.^1^3 ; Narbutovich, A.A.^2

Institute of Chemistry, Far-Eastern Branch, Russian Academy of Sciences, Vladivostok, Russia^1

Vladivostok State University of Economix and Service, Vladivostok, Russia^2

Far Eastern Federal University, Vladivostok, Russia^3

关键词: Acid-base property;    Adsorption centers;    Indicator methods;    Number of samples;    Sodium aluminosilicate;    Sorption capacities;    Sorption properties;    Synthesis conditions;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/525/1/012041/pdf
DOI  :  10.1088/1757-899X/525/1/012041

来源: IOP

【 摘 要 】

Using rice straw of various varieties of the Far Eastern selection as a source of silicon, a number of samples of sodium aluminosilicates with a Si:Al ratio from 1.02 to 1.56 were synthesized. For the obtained samples, the elemental and phase composition was found, the thermal properties were investigated. The morphology of aluminosilicates was studied: The particle size varies from 0.2 to 50 μm with a maximum distribution of about 10 μm, the specific surface area is 364 m2/g. The acid-base properties of the surface of aluminosilicates are characterized by pH-metry methods and the Hammett indicator method, the nature of the distribution of adsorption centers on the surface is established. The sorption capacity of the obtained samples, determined with respect to methylene blue (MB), is from 31.9 to 103.9 mg/g. By varying the synthesis conditions, it was shown that the greatest sorption capacity with respect to MB is achieved at the time of hydrolysis of the original rice straw for 60 minutes. It is shown that the sorption of Cs+ ions in the obtained samples is described by the Langmuir model. The sorption properties with respect to Cs+ ions from aqueous solutions with different salt background were studied.