Kinetic and Thermodynamic Studies for the Efficient Removal of Methylene Blue Using Hordeum Murinum as a New Biosorbent
| Autor: | Saddam Mohammed Al-Mahmoud |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
Exothermic reaction
Work (thermodynamics) Aqueous solution biology Chemistry Enthalpy 02 engineering and technology 010402 general chemistry 021001 nanoscience & nanotechnology biology.organism_classification 01 natural sciences 0104 chemical sciences Gibbs free energy chemistry.chemical_compound symbols.namesake Adsorption Hordeum murinum symbols 0210 nano-technology Methylene blue Nuclear chemistry |
| Zdroj: | Egyptian Journal of Chemistry. |
| ISSN: | 2357-0245 |
| DOI: | 10.21608/ejchem.2020.16008.1970 |
| Popis: | In this work, Hordeum murinum as a sustainable and cost-effective biosorbent material is utilized without any further treatment to remove Methylene blue dye from aqueous solutions. The effects of various parameters including pH, biosorbent amount, reaction time, initial concentration, and temperature are investigated. The results show that 94% of Methylene blue is removed using the optimal adsorption conditions of pH 5.6, biosorbent dose of 0.1 gm, 60 min equilibrium contact time, 20 mg/L of initial dye concentration at a temperature of 25 °C. Experimental results reveal that the adsorption kinetics can have the best description by employing the pseudo-second order model. The spontaneous and exothermic nature of the adsorption process is indicated by the negative values of the Gibbs free energy change and the enthalpy change, respectively. These results reveal that Hordeum murinum exhibited excellent performance for the removal of Methylene blue from aqueous solutions, which can make it very interesting as an alternative and effective low-cost biosorbent material. |
| Databáze: | OpenAIRE |
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