Abstract

Asra Alaghebandi and Bahram Ebrahimi

DOI : http://dx.doi.org/10.13005/ojc/330350

Thermochemical method was used to prepare activated carbon from Kurdistan native acorn as abundant raw material. A two steps temperature program was applied for pyrolysis and activation of chemical oxidized raw material in 350 and 700 ^oC respectively. Surface functional groups were detected in FT-IR spectrum of adsorbent. Also, Formation of uniform porous structure observed in SEM images. Specific surface area (S_BET), pore volume (V_p) and average pore diameter were determined 520.14 m²/g, 0.235 cm³/g and 2.8 nm respectively. Effective parameters on batch experiments such as adsorbent dosage, contact time, initial pH and Fe (III) concentration were optimized. Thermodynamic studies showed that the process was spontaneous (∆G⁰<0) and endothermic with high amounts of ∆H⁰ and positive ∆S⁰. Adsorption of Fe (III) was obeyed from Langmuir model with maximum adsorption capacity 42.12 mg g^-1. Pseudo-second order model was best kinetic model (R>0.995) to describe kinetic of adsorption process of Fe (III).

Adsorption; Activated carbon; Ferric ion; Kurdistan Acorn; West Iran

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