Sorption of copper by olive mill residues.

¹Department of Chemistry, Chemical Engineering and Materials, University of L'Aquila, Monteluco di Roio, L'Aquila 67040, Italy. veglio@ing.univaq.it

|November 8, 2003

Summary

Olive mill residues (OMR) effectively remove copper from wastewater, with washing improving the process. This low-cost biosorbent offers a sustainable solution for treating metal-polluted effluents.

Area of Science:

Environmental Science
Materials Science
Chemical Engineering

Background:

Olive mill residues (OMR) are an abundant waste product from olive oil production.
Industrial wastewater often contains toxic heavy metals like copper.
Developing cost-effective and sustainable methods for metal removal is crucial.

Purpose of the Study:

To investigate the potential of OMR as a biosorbent for copper removal from aqueous solutions.
To characterize OMR and evaluate its copper adsorption capacity.
To explore regeneration methods for OMR and assess its reusability.

Main Methods:

Characterization of OMR using microanalysis and Scanning Electron Microscopy (SEM).
Batch adsorption experiments to determine copper removal efficiency.
Chemical Oxygen Demand (COD) monitoring during biosorption.
Column studies to evaluate performance under dynamic conditions.
Regeneration studies using acid solutions (HCl, CaCl2) and EDTA.

Main Results:

OMR demonstrated significant copper removal (approx. 60%) from solution.
Washing OMR reduced Chemical Oxygen Demand (COD) release without affecting adsorption.
HCl and CaCl2 effectively regenerated the OMR biosorbent.
Column tests showed a breakpoint after treating approximately 1L of solution.
A concentration factor of about 2 was achieved under non-optimized regeneration conditions.

Conclusions:

OMR is a promising, low-cost biosorbent for copper removal from industrial wastewater.
Pre-treatment (washing) of OMR is beneficial for reducing effluent COD.
Acidic regeneration (HCl, CaCl2) is effective for OMR reuse.
OMR offers a sustainable and economically viable approach for treating metal-bearing effluents.

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Sorption of copper by olive mill residues.

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Sorption of copper by olive mill residues.

Area of Science:

Background:

Purpose of the Study:

Main Methods:

Main Results:

Conclusions:

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