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Copper removal from aqueous solution using raw pine sawdust, olive pomace and their derived traditional biochars

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Abstract

In the present study, the ability of four different adsorbents (raw sawdust, raw olive pomace and their derived biochars obtained after pyrolysis) to remove Cu(II) from water was investigated. The derived biochars were prepared using the traditional process of earth mound kilns at a temperature close to 300 °C. The influence of solid charge, contact time, pH, and concentration was studied. The adsorption equilibrium was reached in less than 15 min for sawdust, its biochar, and for olive pomace, and in about 1 h for olive pomace-derived biochar. In the studied conditions where only adsorption occurred in absence of Cu precipitation, the maximum adsorption capacities were determined equal to 4.9, 13.1, 14.9, and 50.8 mg.g−1 for olive pomace-biochar, olive pomace, sawdust, and sawdust-biochar, respectively. Thus, the pyrolysis enhanced the adsorption capacities of sawdust but decreased the ones of olive pomace. This study evidenced that raw olive pomace and sawdust as well as their biochar traditionally prepared, may be used as sustainable, low-cost and efficient adsorbents for Cu(II) removal from aqueous solution.

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Acknowledgements

A. Destrebecq is gratefully acknowledged for ICP-OES analyses.

Funding

The Ministry of Higher Education and Scientific Research of Tunisia (MERS) is acknowledged for a doctoral research grant awarded to I. Mannai.

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Correspondence to S. Sayen.

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Editorial responsibility: Anna Grobelak.

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Mannaï, I., Sayen, S., Arfaoui, A. et al. Copper removal from aqueous solution using raw pine sawdust, olive pomace and their derived traditional biochars. Int. J. Environ. Sci. Technol. 19, 6981–6992 (2022). https://doi.org/10.1007/s13762-021-03629-z

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  • DOI: https://doi.org/10.1007/s13762-021-03629-z

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