Isotherms, kinetics and thermodynamic mechanism of methylene blue dye adsorption on synthesized activated carbon

The treatment of methylene blue (MB) dye wastewater through the adsorption process has been a subject of extensive research. However, a comprehensive understanding of the thermodynamic aspects of dye solution adsorption is lacking. Previous studies have primarily focused on enhancing the adsorption...

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Published in:Scientific reports 2024-01, Vol.14 (1), p.970-970, Article 970
Main Authors: El Jery, Atef, Alawamleh, Heba Saed Kariem, Sami, Mustafa Humam, Abbas, Hussein Abdullah, Sammen, Saad Sh, Ahsan, Amimul, Imteaz, M. A., Shanableh, Abdallah, Shafiquzzaman, Md, Osman, Haitham, Al-Ansari, Nadhir
Format: Article
Language:English
Subjects:
639/166/986
704/172
Activated carbon
Adsorption
Color removal
Dyes
Geoteknik
Humanities and Social Sciences
Industrial wastewater
Isotherms
Kinetics
Methylene blue
multidisciplinary
Rice straw
Science
Science (multidisciplinary)
Soil Mechanics
Straw
Thermodynamics
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Summary:The treatment of methylene blue (MB) dye wastewater through the adsorption process has been a subject of extensive research. However, a comprehensive understanding of the thermodynamic aspects of dye solution adsorption is lacking. Previous studies have primarily focused on enhancing the adsorption capacity of methylene blue dye. This study aimed to develop an environmentally friendly and cost-effective method for treating methylene blue dye wastewater and to gain insights into the thermodynamics and kinetics of the adsorption process for optimization. An adsorbent with selective methylene blue dye adsorption capabilities was synthesized using rice straw as the precursor. Experimental studies were conducted to investigate the adsorption isotherms and models under various process conditions, aiming to bridge gaps in previous research and enhance the understanding of adsorption mechanisms. Several adsorption isotherm models, including Langmuir, Temkin, Freundlich, and Langmuir–Freundlich, were applied to theoretically describe the adsorption mechanism. Equilibrium thermodynamic results demonstrated that the calculated equilibrium adsorption capacity ( q e ) aligned well with the experimentally obtained data. These findings of the study provide valuable insights into the thermodynamics and kinetics of methylene blue dye adsorption, with potential applications beyond this specific dye type. The utilization of rice straw as an adsorbent material presents a novel and cost-effective approach for MB dye removal from wastewater.
ISSN:2045-2322
2045-2322
DOI:10.1038/s41598-023-50937-0