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This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License
Article
Author(s)
OdysseasKopsidas
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DOI:10.17265/2162-5298/2021.05.004
Affiliation(s)
Department of Economics, Aristotle University of Thessaloniki, Thessaloniki 54124, Greece
ABSTRACT
The function of adsorption is widespread in industry. After the adsorption process the adsorbent can be discarded after one use. In practice, however, the economics of the process make it necessary to regenerate the adsorbent with the ultimate goal of reusing it. In industry, activated carbon is usually used as an adsorbent which can be regenerated either chemically or thermally. In the present work, a competitive cost adsorbent is used, the raw chickpea straw, which is a discarded biomass by-product. Methylene blue dye was used as the adsorbent. The experiments were performed on bed length columns 15, 25, 75 and 150 cm respectively. The experimental and theoretical points of the adsorption curves for each column length are presented respectively. The experimental diagrams confirm the validity of the Bohart and Adams equation for dilute solutions with low concentrations. Chickpea straw can be offered to the industry as an adsorbent for textile dyes due to its adsorption capacity and low cost. At the same time, from the aggregate diagrams of the dilute solutions listed above, we observe: For Fig. 1 concerning the adsorbents we used we observe that the capacity KF has a higher value for the ground cork while the lower one for olive ash. Also, for Fig. 2 regarding the adsorbent materials we used we observe n of the isothermal Freundlich has a maximum for olive ash, while a minimum has for two materials lentil straw and ground cork. The database is an important and organizational element of knowledge as its use causes positive economies of scale in the utilization of given scientific knowledge and information. The aim of the present work is to construct an electronic database that includes the existing literature regarding the adsorption conditions of various dyes by some adsorbents.
KEYWORDS
Adsorption, methylene blue, biomass.
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