Properties of activated carbon prepared from residues of African pearwood (Baillonella toxisperma Pierre) and tested by iodine adsorption from aqueous solution
The removal of iodine through adsorption on four types of activated carbon (C1, C2, C3, C4) obtained from local Cameroonian Moabi (Baillonella toxisperma Pierre) residues and on three commercial activated carbons (C5, C6, C7) was studied in a batch mode. The calculation of the iodine index and the analysis of adsorption isotherms obtained using the Langmuir and Freundlich theories allow for the determination of the classification of adsorption. It was found that the iodine index of one activated carbon obtained from Moabi residues (C4) is near to those obtained for the commercial activated carbons. Moreover, the iodine adsorption is clearly described by the Langmuir theory with the maximum capacity of adsorption varying between 9.35 mmol∙g‐1 (C4) and 13.18 mmol∙g‐1 (C7).