In the aim of the valorisation of agricultural waste, less expensive and effective support for the retention of the dyes are tested, this study propose two natural supports which are the local orange peel and banana peel exported to Algeria from Ecuador, this last solid waste undergoes a chemical treatment for test their effective sorption in the two cases natural and activated.
The sorbent was washed with distilled water to remove the surface adhered particles and water-soluble materials. Then it is dried with the exposure of the sun light. In order to eliminate de humidity and facilitate crushing, the peels were heat in an oven at 105°C. The dried slices were ground and sieved to obtain a particle size range of 0.315 mm and stored in dissector for further use. Part of solid support undergoes a chemical activation.