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Advances in Environmental Research
  Volume 5, Number 1, March 2016 , pages 37-50

Optimization of methylene blue adsorption by pumice powder
Deniz İzlen Çifçi and Süreyya Meriç

    The main objective of this study is to evaluate adsorptive removal of Methylene Blue (MB) dye from aqueous solution using pumice powder. The effects of pH, adsorption time, agitation speed, adsorbent dose, and dye concentrations on dye adsorption were investigated. Process kinetics and isotherm model constants were determined accordingly. The results showed that adsorbent dose, dye concentration and agitation speed are the important parameters on dye adsorption and the removal of MB did not significantly change by varying pH. A total adsorption process time of 60 min was observed to be sufficient to effectively remove 50 mg/L MB concentration. The MB adsorption data obeyed both pseudo first order and second order kinetic models. Adsorption of MB by pumice fitted well both Langmiur and Freundlich isotherms (R2
Key Words
    adsorption; dye; pumice; kinetics; methylene blue; surface chemistry
Department of Environmental Engineering, Çorlu Engineering Faculty, Nam

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