E. A. Butskikh, I. V. Voronyuk, T. V. Eliseeva, G. V. Medyak, A. P. Polikarpov
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引用次数: 0
Abstract—
Excessive contents of boron and its compounds can exhibit toxic effects despite their necessity for functioning living organisms. An urgent task is to remove them in various ways, including the use of sorption technologies. Boron-selective sorbents with functional OH groups and granular anion exchangers with functional amino groups are capable of extracting boron compounds. This paper is devoted to studying boric acid sorption under static conditions on FIBAN A-5 fibrous sorbent, which shows a high affinity for boron and can be used as an alternative to anion-exchange resins produced in the form of granules. The features of the kinetics and equilibrium of the sorption by the studied fiber brought in contact with boric acid solutions have been studied. It has been found that the time required to reach the equilibrium state decreases with the intensification of stirring and an increase in the concentration gradient in a solution. Sorption isotherms are of a stepwise character due to the existence of boron in different forms at concentrations above 0.025 M. The influence of temperature, pH of a solution, and ionic form of the sorbent on the capacity of FIBAN A-5 fiber has been determined.
期刊介绍:
Colloid Journal (Kolloidnyi Zhurnal) is the only journal in Russia that publishes the results of research in the area of chemical science dealing with the disperse state of matter and surface phenomena in disperse systems. The journal covers experimental and theoretical works on a great variety of colloid and surface phenomena: the structure and properties of interfaces; adsorption phenomena and structure of adsorption layers of surfactants; capillary phenomena; wetting films; wetting and spreading; and detergency. The formation of colloid systems, their molecular-kinetic and optical properties, surface forces, interaction of colloidal particles, stabilization, and criteria of stability loss of different disperse systems (lyosols and aerosols, suspensions, emulsions, foams, and micellar systems) are also topics of the journal. Colloid Journal also includes the phenomena of electro- and diffusiophoresis, electro- and thermoosmosis, and capillary and reverse osmosis, i.e., phenomena dealing with the existence of diffusion layers of molecules and ions in the vicinity of the interface.