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Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater

Konan, Affoué Tindo Sylvie and Richard, Romain and Andriantsiferana, Caroline and Yao, Kouassi Benjamin and Manero, Marie-Hélène Low-cost activated carbon for adsorption and heterogeneous ozonation of phenolic wastewater. (2019) Desalination and Water Treatment, 163. 336-346.

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Official URL: https://doi.org/10.5004/dwt.2019.24804

Abstract

This work is aimed at elaborating an innovative material from palm tree waste that can be used in industrial applications for adsorption and catalytic oxidation. This low-cost activated carbon, elaborated from Borassus palm tree waste (bpAC) showed textural and chemical properties comparable with common activated carbon. Moreover, it demonstrated interesting behaviour when it was coupled with ozone to remove a phenolic compound, 2,4-dimethylphenol (2,4-DMP). This refractory model molecule was removed two times faster in the presence of bpAC and was achieved in only 7 min. The total organic carbon (TOC) removal by only adsorption on bpAC was satisfactory with a value of 93.8% after 8 h. Nevertheless, the most interesting result concerned the TOC removal during catalytic ozonation which increased from 26% (single ozonation, i.e., without bpAC) to 91% in the presence of bpAC. The addition of a radical scavenger (tert-butanol) showed that hydroxyl radicals were involved during ozonation with bpAC. Moreover, a kinetics study highlighted that both radical and molecular mechanisms were acting in heterogeneous reaction. All the results were finally validated by treating real wastewater spiked with 2,4-DMP, confirming the ability of this bpAC to enhance the treatment of phenolic wastewaters.

Item Type:Article
HAL Id:hal-02309937
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS (FRANCE)
Other partners > Institut National Polytechnique Felix Houphouët-Boigny - INP-HB (IVORY COAST)
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT (FRANCE)
Université de Toulouse > Université Toulouse III - Paul Sabatier - UPS (FRANCE)
Laboratory name:
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Deposited By: Romain RICHARD
Deposited On:09 Oct 2019 14:50

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