Comparative study of low cost adsorbents prepared indigenously from locally available bio-waste for the removal of methylene blue dye.

Daniel Kibami

Abstract


The removal of Methylene blue dye from aqueous solutions using Fagopyrum esculentum Moench (Buckwheat) and Bambusa vulgaris (common bamboo) as adsorbents was investigated. Spectroscopic data of the different adsorbents understudy indicates the presence of carbonyls, alcohols and ethers as the most abundant carbon-oxygen functional groups on the activated carbons. The effects of various experimental parameters such as effect of initial concentration, contact time and pH have been studied using batch adsorption technique. Adsorption data fitted well with all the three adsorption isotherm models. However, Frendulich isotherm displayed a better fitting model than the other two isotherms because of the higher correlation coefficient of R2 (0.8799–0.9962) this indicates the applicability of multilayer coverage of the Methylene blue dye on the surface of adsorbent.


Keywords


Methylene blue; Batch method; Adsorption; Multilayer

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