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The present study deals with
investigation of methylene blue by adsorption onto activated biomass
of Prunus cerasus (ACBPC), the experimental work was carried out on
methylene blue (MB) removal by ACBPC. The effect of various factors
such as contact time, adsorbent dosage, initial dye concentration,
temperature, and pH of dye solution was investigated. The maximum MB
removal was observed at pH 8. The adsorption equilibrium was
represented with Langmuir, Freundlich, and Temkin isotherm models.
Langmuir and Tempkin equations were found to have the correlation
coefficient value in good agreement. The high value of correlation
coefficient 0.998 indicates the applicability of Langmuir isotherm
which assumes a monolayer coverage and uniform activity distribution
on the sorbent surface. Adsorption of MB onto ACBPC followed pseudo
second order kinetics. The calculated values of DH°, DS°, and DG°
were found to be 19.30 kJ/mol, 73.35 kJ/mol, and –1.54 kJ/mol,
respectably. Adsorption process was spontaneous and endothermic in
nature.
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