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We investigated the adsorption of silver(I) from silver nitrate (AgNO3) and silver sulphate (Ag2SO4). We compared the adsorption ability of chitosan in the form of hydrogel beads with that of chitosan acetate – an initial solution from which the beads were derived. We developed a model of adsorption kinetics, assuming the simultaneous occurrence of the diffusion process and the chemical reaction....
We analysed the feasibility of using unmodified chitin exoskeletons and moults of mealworms (Tenebrio molitor) as adsorbents to remove cationic dyes – Basic Violet 10 (BV10) and Basic Red 46 (BR46) – from aqueous solutions. We evaluated the characteristics of the adsorption materials using Fourier-transform infrared spectroscopy and determining the pH of the point of zero charge (pHPZC); the pH effect...
Sawdust of Swietenia macrophylla waste was used as a bio-sorbent for the removal malachite green from aqueous solutions in this study. Various parameters’ effect such as contact time, pH, initial dye concentration, temperature and adsorbent dosage were studied on the bio-sorbent. Spectrophotometric technique was implemented for the measurement of dye concentration before and after adsorption. The...