Adsorption of Disperse Blue SBL dye by synthesized poorly crystalline hydroxyapatite

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The present study has been undertaken to evaluate the adsorption in batch mode of a disperse dye (Disperse Blue SBL) by poorlycrystalline hydroxyapatite synthesized by coprecipitation between Ca(NO3)2 and (NH4)2HPO4 reagents in aqueous solution at roomtemperature. The adsorption experiments were carried out to investigate the factors that influence the dye uptake by the adsorbent, suchas the contact time under agitation, adsorbent dosage, initial dye concentration, solution temperature, and pH. The experimental resultsshow that the percentage of dye removal increases with increasing the amount of adsorbent, until the total discoloration. The adsorptionisotherms follow the model of Langmuir with a high adsorption capacity. The adsorption was pH and temperature dependent.
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