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Gymnospora Research Paper

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STUDIES ON ADSORPTION POTENTIAL OF PADINA GYMNOSPORA FOR THE REMOVAL OF METHYLENE BLUE FAISAL MOHAMED KHAN Department of chemical engineering AC Tech , Anna University CHENNAI Abstract The adsorption capacity of Padina Gymnospora of Methylene blue was studied in this paper. The effect of initial dye concentration, temperature, contact time, sorbent dosage and agitation speed on the adsorption capacity of Padina Gymnospora were studied. The amount of dye absorbed at equilibrium was found to vary from 73.64mg/g to 460.2151mg/g with increasing initial dye concentration varying from 20-100 mg/L for a biomass of 0.2grams.It was found that the biomass showed highest adsorption capacity at 100 mg/L dye concentration at a sorbent dosage of 0.2grams …show more content…

Pseudo first order kinetics for Methylene blue dye adsorption on 0.2 grams of Padina Gymnospora (Temperature=20⁰C) The slope and intercept of the graph plotted between t/q vs. t gave the pseudo second order coefficients k_2 and〖 q〗_(1eq,cal). Comparing calculated values of q_e with observed values of q_e shows the adsorption of methylene blue on Padina gymnospora is relatively well explained by pseudo second order kinetics. This assessment of the kinetics of the sytem is supported by a R^(2 )coefficient in the range of 0.999 to 1. This results suggests that adsorption of methylene blue was likely controlled by chemisorptions and took place through surface exchange reactions until the surface active sites were fully occupied; then the dye molecules diffuse into the adsorbent network for further interactions ( Crini 2008 ). The summary of the constants obtained in both pseudo first order and pseudo second reactions are summarized in table 4 Figure 8. Pseudo second order kinetics for Methylene blue dye adsorption on 0.2 grams of Padina Gymnospora (Temperature=20⁰C) Fourier transform infrared spectroscopy (FTIR) FTIR was carried out analyze the functional groups present in the dye solution before and after adsorbance and the spectrum is shown in fig.9 and

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