Removal of 2,4-Dichlorophenol from aqueous medium using activated carbon prepared from cocoa pod husks

• Published in: Chemical Data Collections 2023-04, Vol.44, p.100997, Article 100997
• Main Authors: Anumasahun, Oluwapamilerin Victor, Akinola, Akinshola Olabamiji, Bello, Oyeronke Olubunmi, Agboola, Oluwatobi Samuel, Bello, Olugbenga Solomon
• Format: Article
• Language: English
• Subjects: 2, 4-DCP; Isotherm; Kinetics; Sequestration; Thermodynamics
• ISSN: 2405-8300; 2405-8300
• DOI: 10.1016/j.cdc.2023.100997

The sequestration of 2, 4-DCP from aqueous medium by the use of acid-activated cocoa pod husk carbon (CPAA) was thoroughly studied and the results were fitted into four distinct isotherm models. Based on the R2 values and other relevant parameters, the data best fit in the following order: Langmuir > d-R >Freundlich>Temkin. The data obtained from the kinetic study was best explained by the pseudo second-order (PSO) model. Owing to the very high proximity of the values of qe.exp and qe.calc, coupled with the R2 for PSO approaching 1 and the comparatively lower SSE values, the PSO is the best model depicting the adsorption of 2,4-DCP onto CPAA adsorbent. The feasibility and spontaneity of the sorption system was affirmed by the value of ΔG0 (-35.287 kJ/mol) being negative and that of ΔS° (+0.335) being positive. The entropy change being positive signifies an elevation in the disorderliness of the system which further favors the spontaneity of the system. The negative ΔH° value reveals exothermic processes while the value of the Arrhenius constant being less than 100.0 kJ/mol, suggests that the entire adsorption process is physisorption. Hence the potential of CPAA to efficiently remove 2, 4-DCP is established by this study.