Complexation of Saponite Clay by Depositing Magnetite Particles on Clay Surface and Its Evaluation
Shigeki NISHIDA, Atsushi NAKAHIRA and Koushi FUKUNISHI
Abstract:Saponite clays with fine magnetite particles were synthesized by adding solution containing Fe2+ and Fe3+ ions and 10N-NaOH to 1wt%-clay suspension in order to expand the application of clay as an absorbent. The products were analyzed by X-ray powder diffraction (XRD) and thermal analysis. Their microstructure was observed by transmission electron microscopy (TEM). The properties of absorption were evaluated by nitrogen gas and by methylene blue adsorption measurement. The results of XRD showed that products indicate only two phases, clay and magnetite crystal structure, and saponite with fine magnetite particles. Furthermore, from the results of methylene blue adsorption measurement, the usage of saponite clays with fine magnetite particles could result in the removal of methylene blue as an absorbent. Key Words:Saponite, Magnetite, Precipitation, Microstructure, Methylene blue adsorption