CHARACTERISTICS AND PHENOL RED ADSORPTION CAPACITY IN AQUEOUS SOLUTIONS OF SBA-15 ADSORBENT SYNTHESIZED FROM THE ASH OF BRICKYARD

Tóm tắt

The ash of brickyards or rice husk ash is a big problem for the environment, and it is necessary to have good solutions to manage and utilize as a raw material for other industries. In addition, the organic wastes with high solubility in water have been also causing many bad consequences to human health, animals, and plants. Therefore, this study used the ash of brickyard to synthesize SBA-15 materials known as adsorbents in removal of organic wastes like as phenol red out of aqueous solutions. The experimental results showed that the SBA-15-based nanomaterials had well-ordered hexagonal meso-structure and its pore diameter was approximately 7.8 nm. The nano-adsorbents of SBA-15 had also high adsorption of the phenol red. The experimental data on phenol red adsorption were evaluated based on the Langmuir isotherm model and the pseudo-second-order model well with high regression coefficients at R2 = 0.9995 and 0.9900, respectively. The phenol red adsorption efficiency of SBA-15-based nanomaterials was really high at 98.8 % and its maximum adsorption capacity reached to 19.77 mg.g-1