Olive mill wastewater from a liquid biological waste to a carbon/oxocalcium composite for selective and efficient removal of methylene blue and paracetamol from aqueous solution

[Display omitted] •OMWW has been successfully converted to carbon/oxocalcium composite.•The insertion of CaO produces a composite carbon rich in negative sites.•CCO(0.300%CaO) showed ultra-high adsorption capacity for MB dye.•MB dye is adsorbed on the surface of CCO(0.300%CaO) by electrostatic inter...

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Bibliographic Details
Published in:	Bioresource technology Vol. 365; p. 128162
Main Authors:	Mechnou, Issam, Meskini, Sarra, El Ayar, Doha, Lebrun, Laurent, Hlaibi, Miloudi
Format:	Journal Article
Language:	English
Published:	Elsevier Ltd 01-12-2022
Subjects:	Adsorption Carbon composite Olive mill wastewater Removal of hazardous molecules Valorization of biological wastewater Olive mill wastewater Carbon composite Valorization of biological wastewater Adsorption Removal of hazardous molecules
Online Access:	Get full text
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Summary:	[Display omitted] •OMWW has been successfully converted to carbon/oxocalcium composite.•The insertion of CaO produces a composite carbon rich in negative sites.•CCO(0.300%CaO) showed ultra-high adsorption capacity for MB dye.•MB dye is adsorbed on the surface of CCO(0.300%CaO) by electrostatic interactions.•Paracetamol is adsorbed on the surface of CCO(0.300%CaO) by π -π and hydrogen bonds. In this study, a Carbon/Oxocalcium was prepared from olive mill wastewater and successfully applied to the removal of paracetamol and methylene blue (MB) from an aqueous medium. The optimized composite (0.3 % CaO) is rich in anionic sites, porous and has a specific surface area of about 1383 m2.g−1. Adsorption tests showed significant adsorption capacities up to 1141 mg.g−1. The adsorption of MB and paracetamol is well described by the Redlich-Peterson and Dubinin-Radushkevich isotherm, respectively. Moreover, the adsorption kinetics fitted to pseudo-second order. The π -π interactions, hydrogen bonds and electrostatic interactions were responsible for the adsorption of paracetamol and MB substrates. This work develops by a single, easy and simple action a new effective and selective material for the removal of emerging pollutants, a new method for the development of more stable carbon composites and a cost-effective method for the valorization of olive mill wastewater.
Bibliography:	ObjectType-Article-1 SourceType-Scholarly Journals-1 ObjectType-Feature-2 content type line 23
ISSN:	0960-8524 1873-2976
DOI:	10.1016/j.biortech.2022.128162