Abstract
This chapter starts with the basic introduction of adsorption, its types, and its mechanism. Investigated different sorbents for batch and column treatment are tabulated with respective references. Isotherms for batch (Freundlich and Langmuir) and columns (Thomas, Yoon-Nelson, bed depth service time, and Adams and Bohart) are discussed. Feasibility and comparison of naturally prepared adsorbents, that is, neem (Azadirachta indica) leaf powder, guava (Psidium guajava) leaf powder, and tamarind (Tamarindus indica) seed powder, and their activated forms using different acids are determined using various sophisticated analytic facilities like Fourier transform infrared, particle size distribution, scanning electron microcopy, and surface area, porosity, pore diameter, and pore volume analyses and also adsorptive batch treatment on dye solution. Treatment data using Freundlich and Langmuir isotherm are analyzed and compared. It is concluded that activated neem leaf powder, activated guava leaf powder using sulfuric acid, and normal tamarind seed powder are more suitable than their investigated analog adsorbents for the adsorption process to remove dyes and other contaminations.
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