Effect of Temperature on the Kinetics of Sorption of Co2+ and Ni2+ Ions by a Sorbent Based on an Inositol Hexaphosphoric Acid Derivative


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Abstract

Data on the effect temperature has on the kinetics of the removal of Co2+ and Ni2+ ions under static conditions by a sorbent based on a derivative of phytic acid fabricated from rice production waste are presented. It is shown that when the temperature is raised from 20 to 60°C, the sorption capacity of the sorbent based on phytic acid increases over the period of sorption and within 180 min reaches values of 1.4 mmol g−1 for Co2+ ions and 1.3 mmol g−1 for Ni2+ ions. It is established that for the investigated range of temperatures, order n of the sorption of Co2+ and Ni2+ ions is <1, which characterizes the reactions accompanied by diffusion processes. It is found that the process of removal of Co2+ and Ni2+ ions is characterized with low activation energy (20.74 kJ mol−1 for Co2+ ions and 14.2 kJ mol−1 for Ni2+ ions). It is also demonstrated that the sorption process in the considered time frame is best described by a kinetic model of a pseudo-second order, as is indicated by respective correlation coefficients.

About the authors

S. B. Yarusova

Institute of Chemistry; Vladivostok State University of Economics and Service

Author for correspondence.
Email: yarusova_10@mail.ru
Russian Federation, Vladivostok, 690022; Vladivostok, 690014

N. V. Makarenko

Institute of Chemistry

Email: yarusova_10@mail.ru
Russian Federation, Vladivostok, 690022

P. S. Gordienko

Institute of Chemistry

Email: yarusova_10@mail.ru
Russian Federation, Vladivostok, 690022

M. A. Karpenko

Institute of Chemistry

Email: yarusova_10@mail.ru
Russian Federation, Vladivostok, 690022

E. S. Novikova

Vladivostok State University of Economics and Service

Email: yarusova_10@mail.ru
Russian Federation, Vladivostok, 690014

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