WSTA 15th Gulf Water Conference

WSTA 15th Gulf Water Conference
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Hexavalent chromium removal from wastewater using a continuous fixed-bed system with date palm stems

Dalila Ziani, Aziz Maaliou, Leila Djekoune, Abderzak Moussouni

https://doi.org/10.5004/ic202418

Hexavalent chromium removal from wastewater using a continuous fixed-bed system with date palm stems

Dalila Ziani1, Aziz Maaliou1, Leila Djekoune2, Abderzak Moussouni3

1 University of Science and Technology Houari Boumediene, Faculty of Civil Engineering, Department of Geotechnics and Hydraulics, Laboratory of Geotechnical and Hydrological Environment (LEGHYD); PB 32, El-Alia-Bab-Ezzouar, Algiers, 16111, Algeria
2 University of Science and Technology Houari Boumediene, Faculty of Mechanical and Process Engineering, Department of Environmental Engineering, Laboratory of Industrial Process Engineering Sciences (LSGPI); BP 32, El-Alia-Bab-Ezzouar, Algiers, 16111, Algeria
3 University Center Abdelhafid Boussouf Mila, Institute of Science and Technology, Department of Civil Engineering and Hydraulics, Laboratory of Geotechnical and Hydrological Environment (LEGHYD); BP 26 RP, Mila, 43000, Algeria

https://doi.org/10.5004/ic202418

ABSTRACT

In this study, we explore a cost-effective, environmentally friendly method for hexavalent chromium (Cr(VI)) removal from wastewater at the Ben Chaabane treatment plant in Blida, Algeria, using date palm stems. Our approach utilizes an abundant agro-industrial by-product, aiming to replace conventional materials with a more sustainable alternative. We conducted experiments to optimize the contact time, bed height, and flow rate in a fixed bed column setup. The results indicate that under optimal conditions—specifically, a contact time of 90 min, a bed height of 1 cm, and a flow rate of 1 ml/min—the Cr(VI) removal efficiency reaches 99.26%. This process reduces the chromium concentration to 0.031 mg/L, significantly below Algeria's discharge standard of 0.1 mg/L. These results highlight the potential of using sustainable materials for effective heavy metal removal in wastewater treatment.

Keywords: Hexavalent chromium removal; Sustainable wastewater treatment; Date palm stems; Environmental remediation; Algerian discharge standards

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