Preparation and Characterization of an Activated Carbon Based on Coconut Shell for the Elimination of 2,4-Dichlorophenoxyacetic Acid in Aqueous Medium

Dibi Kouadio *

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

Meite Ladji

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

Diarra Moussa

Laboratoire des Sciences et Technologie de l’Environnement, Université Jean Lorougnon GUEDE BP 150 Daloa, Côte d’Ivoire.

Aboua Kouassi Narcisse

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

N’guettia Kossonou Roland

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

Soro Donafologo Baba

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

Mamadou Koné

Laboratoire des Sciences de l’Environnement, Université Nangui Abrogoua 02 BP 801 Abidjan 02, Côte d’Ivoire.

*Author to whom correspondence should be addressed.


Abstract

The objective of this work is to evaluate the capacity of activated carbon prepared from coconut shells to eliminate 2,4-dichlorophenoxyacetic acid from aqueous solution. The characterization tests revealed that the specific surface area determined by the BET method is 570 m²/g consisting essentially of micropores. The chemical characteristics determined by the Boehm method indicate the acidic character of the carbon. The 2,4- dichlorophenoxyacetic acid adsorption tests revealed that the adsorption rate of 2,4- dichlorophenoxyacetic acid increases with increasing contact time, but decreases with increasing initial concentration. To do this with a mass of 0.5 g, for a concentration of 5 mg/l for a 100 min agitation time, the rate of elimination of the 2.4-D reaches 77 %. The adsorption capacity studied showed that the adsorption process of 2,4-D on activated carbon is controlled by pseudo-second order kinetics.

Keywords: 2,4-dichlorophenoxyacetic acid, coconut shells, activated carbon, adsorption kinetics, phosphoric acid


How to Cite

Kouadio, Dibi, Meite Ladji, Diarra Moussa, Aboua Kouassi Narcisse, N’guettia Kossonou Roland, Soro Donafologo Baba, and Mamadou Koné. 2025. “Preparation and Characterization of an Activated Carbon Based on Coconut Shell for the Elimination of 2,4-Dichlorophenoxyacetic Acid in Aqueous Medium”. Chemical Science International Journal 34 (1):81-94. https://doi.org/10.9734/CSJI/2025/v34i1949.