Abstract
This study describe the adsorption of two cationic dyes (Methylene blue and Rhodamine 6G) from aqueous solutions on to Iraqi porcelanite rocks as adsorbent .A series of experiments were undertaken in a batch adsorption technique to access the effect of the process variables i.e contact time, initial pH, adsorbent dose and temperature .The equilibrium in the solution was observed within ( 30 min ) which was indicated by UV-visible absorption spectroscopy technique. The equilibrium data for adsorption were fitted to the Freundlich and Langmuir. The temperature thermodynamic parameters like ∆G°, ∆H° and ∆S° have been calculated.
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