Abstract
The effects of equilibrium time, solution pH, and sorption temperature of cationic methylene blue (MB) adsorption on nanoporous metallosilicoaluminophosphate ZnAPSO-34 were studied using a batch equilibration method. UV–Vis spectroscopy was used to obtain the adsorption isotherms at 20°C. The optimum period for adsorption was 300 min. In fact, MB removal increased from 82 to 95% when we double the amount of adsorbent from 0.05 to 0.1g l−1. The equilibrium adsorption data were analyzed using Langmuir, Freundlich, and Temkin isotherm models. Langmuir isotherm was found to be the best-fitting model and the process followed pseudo-second-order kinetics. The results showed that ZnAPSO-34 could be employed as an alternative for the removal of dyes and colorants from aqueous solutions.
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