Biosorption of Acid Blue 5 by Biomass Derived from Eichhornia crassipes: Batch and Column Studies

摘要

Biosorption of Acid Blue 5 dye by the Eichhornia crassipes was investigatednin batch and column studies. Batch experiments were conducted to study the effectnof initial solution pH and dye concentration. Langmuir and Freundlich sorptionnmodels were used to represent the equilibrium data. Experimental breakthroughncurves in a column were obtained with bed height (5, 10 and 15 cm), flow raten(20, 25 and 30mL/min) and initial dye concentration (50, 75 and 100 mg/L). Annincrease in bed height and initial dye concentration favors the dye biosorption,nwhile the minimum flow rate produced maximum dye biosorption. It was observednthat the uptake of Acid Blue 5 using a bed height of 15 cm, flow rate ofn20 mL/min and initial dye concentration of 100 mg/L was found to be more whenncompared to all other bed height, flow rate and initial dye concentration studied innthe present investigation. The Bed Depth Service Time (BDST) model was usednfor the evaluation of continuous sorption data.