Adsorption of Crystal Violet Dye from Aqueous Solutions Using Syrian Phosphate Ore

Abstract

Crystal Violet is an industrial organic dye widely used in the textile and medical fields; however, its accumulation in water poses a major environmental and health risk.

     Syrian phosphate ore particularly the one extracted from the Khneifis mines in the Palmyra region was used to study the adsorbent of positively charged crystal violet dye from aqueous solutions using the static method and at laboratory temperature(25^oC). The results showed that the adsorption process is fast at the beginning and reached equilibrium after 120 minutes. The experiments were carried out within a range of pH (pH=4 to 10), It was observed that the adsorption efficiency increases with the increase of pH values. The maximum adsorption capacity (8 mg/g) was achieved at 25°C and an initial concentration of 50 mg/L.

     The adsorption rate increased with increasing adsorbent mass until reaching a steady state, the  results showed that, the adsorption process was consistent with the Langmuir isotherm model, reflecting the formation of a monomolecular adsorption layer, and confirming that the Syrian phosphate ore is a promising national resource that can be exploited for environmental pollution treatment applications.