Kinetics and equilibrium studies of removal of an azo dye from aqueous solution by adsorption onto scallop

Kinetics and equilibrium studies of removal of an azo dye from aqueous solution by adsorption onto scallop

In the present work removal of an azo dye (Reactive Black 5) was investigated from aqueous solution byadsorption onto scallop as a low-cost and widely available adsorbent. The effect of various operationalparameters, such as contact time, pH, initial dye concentration and adsorbent dosage on the removalefficiency of dye was studied. Removal efficiency declined with the increase in solution pH and initial dyeconcentration but with the decrease in adsorbent dosage. Experimental equilibrium and kinetics datawere fitted by Langmuir and Freundlich isotherms and pseudo-first-order and pseudo-second-orderkinetic models, respectively.

In the present work removal of an azo dye (Reactive Black 5) was investigated from aqueous solution byadsorption onto scallop as a low-cost and widely available adsorbent. The effect of various operationalparameters, such as contact time, pH, initial dye concentration and adsorbent dosage on the removalefficiency of dye was studied. Removal efficiency declined with the increase in solution pH and initial dyeconcentration but with the decrease in adsorbent dosage. Experimental equilibrium and kinetics datawere fitted by Langmuir and Freundlich isotherms and pseudo-first-order and pseudo-second-orderkinetic models, respectively.