The Pecularity Of Sorption Of Some Toxic Ions
THE PECULARITY OF SORPTION OF SOME TOXIC IONS
BY ALUMINIUM HYDROPHOSPHATES PREPARED
BY SOL–GEL TECHNOLOGY
V. V. Strelko, V. A. Kanibolotsky, A. A. Zaitseva,
S. I. Meleshevich, N. I.Chubar
Institute for Sorption and Endoecology Problems,
National Academy of Sciences of Ukraine, Kyiv, Ukraine
The new sol-gel method of synthesis of aluminium hydrooxides was elaborated, in which simple and accesible chemicals - inorganic aluminium salts, acides and bases - were used, instead of traditionally used in sol-gel synthesis expensive and unsafe in using organic derivatives of metales. The optimum conditions for formations of aluminium hydrophosphates gels, contained different amounts of phosphates and hydrooxides groups, were worked out, using indicated substances. The influence of different factors, such as temperature of synthesis, concentration and ratio of reagents and so on, to process of gels formation and physico-chemical properties of obtained gels was studed, and the best conditions for gels coagulation, washing and drying of sorbents were determined.
The influence of ratio between phosphate and hydrooxide groups to sorption and chemical properties of obtained aluminium hydrophosphate sorbents was investigated, and the best ratio were determined for sorptin of the number of ions. To study ionexchange properties of sorbents curves of potentiometric titration were reserched. The pecularity of sorption of cation and anion forms of some ions, such as anions CrO42-, AsO42-, cations Cu2+ and so on, which are priority contaminaters, was detaily investigated; the influence of quantity of ionexchange capacity to pH and sorption kinetics indicated ions were reserched. The high affinity of aluminium hydrophosphate sorbents to anions of CrO42-, AsO42- was received.
The data of porometric characteristic, results of IR- and X-ray studies of obtainen aluminium hydrophosphate sorbents are represented.
Related articles::