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a b s t r a c tAvocado seed activated carbon (ASAC) was synthesized by microwave-heating process using ZnCl 2 as an activating agent. The adsorbent ASAC was characterized using analytical techniques namely N 2 isotherms, Fourier transform infrared spectroscopy, and scanning electron microscopy. The surface area of ASAC was 1,432 m 2 g -1 . The ASAC prepared was used for adsorption of resorcinol and 3-aminophenol from aqueous solutions. Kinetic models namely pseudo-first order, pseudo-second order, and Avrami fractional order and isotherms (Freundlich, Langmuir, and Liu) were applied to the experimental adsorption data. The results demonstrate maximum adsorption capacity for resorcinol (406.9 mg g -1 ) and 3-aminophenol (454.5 mg g -1 ) at 50°C. The thermodynamic analysis of data and the effect of temperature studies revealed that the adsorption processes of resorcinol and 3-aminophenol onto ASAC were temperature dependent. The adsorption processes were exothermic and spontaneous. The avocado carbon displayed excellent adsorption properties for the simulated effluents containing phenolic compounds.

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