Effect of textural and chemical characteristics of activated carbons on phenol adsorption in aqueous solutions

Vargas, Diana P.; Giraldo, Liliana; Moreno-Piraján, Juan Carlos

doi:10.1515/pjct-2017-0072

Abstract

The effect of textural and chemical properties such as: surface area, pore volume and chemical groups content of the granular activated carbon and monoliths on phenol adsorption in aqueous solutions was studied. Granular activated carbon and monolith samples were produced by chemical activation. They were characterized by using N₂ adsorption at 77 K, CO₂ adsorption at 273 K, Boehm Titrations and immersion calorimetry in phenol solutions. Microporous materials with different pore size distribution, surface area between 516 and 1685 m² g⁻¹ and pore volumes between 0.24 and 0.58 cm³ g⁻¹ were obtained. Phenol adsorption capacity of the activated carbon materials increased with increasing BET surface area and pore volume, and is favored by their surface functional groups that act as electron donors. Phenol adsorption capacities are in ranged between 73.5 and 389.4 mg · g⁻¹.

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Effect of textural and chemical characteristics of activated carbons on phenol adsorption in aqueous solutions

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