Synthesis, characterization of analcime and its application in water treatment from heavy metal

الملخص EN

In this study analcime was successively synthesized from kaolinite as a raw material using the fusion with NaOH method.

The conditions of hydrothermal crystallization (zeolitization) were found to be at temperature of 170 C˚, and time span between 36 h and 72 h for kaoline.

The synthetic materials have been characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermo gravimetric (DTA/TGA) analysis.

The results indicate that the crystallization of analcime not affected by the hydrothermal reaction time.

The synthetic analcime experimented to up taking some of heavy metals from prepared slandered solution or natural contaminated ground water.

The results showed that the synthetic analcime has good efficiency in removal of heavy metals ions (Fe and Mn) with concentrations up to 50 ppm, and Cd and Pb ions to about 10 ppm.

The percent adsorption (%) was evaluated with changes in the parameters such as, dosage of adsorpent, PH and time for different heavy metals ions.

The order of removal for the different ions is as follows: Pb2+ > Cd2+ > Mn2+ > Fe2+.

The Langmuir constants model for Fe2+ ions sorption on the adsorption isotherms is fitted well.

The RL value in the present investigation at concentration more than 5 ppm was equal or less than one, and equal one for Mn 2+, indicating that the adsorption of the metal ion by analcime is favorable.