Batch Adsorption Studies on Rice Husk with Methyl Violet Dye

• Authors: Daniel Omeodisemi Omokpariola , Joy Njoku Otuosorochi
• Languages of publication: EN

Abstracts

EN

The potential of rice husks powder (RHP) for the removal of methyl violet dye from aqueous solution was investigated. Batch adsorption studies were conducted and various parameters such as contact time, adsorbent dosage, initial dye concentration, pH and temperature were studied to observe their effects in the dye adsorption process. The optimum conditions for the adsorption of MV onto the adsorbent (RHP) was found to be: contact time (100 min) pH (10.0) and temperature (303 K) for an initial dye concentration of 50 mg/l and adsorbent dose of 1.0 g respectively. The experimental equilibrium adsorption data fitted best and well to the Freundlich Isotherm model for both dyes adsorption. The maximum adsorption capacity was found to be 1.66 mg/g for the adsorption of MV dye. The kinetic data conformed to the pseudo second order kinetic model. Thermodynamic quantities such as Gibbs free energy (ΔGº), enthalpy (Δº) and entropy (ΔSº) were evaluated and the negative values of ΔGº, ΔHº and ΔSº obtained indicate the spontaneous and exothermic nature of the adsorption process.

Keywords

EN

Rice husks powder; adsorption; kinetics; methyl red dye; methyl violet; thermodynamics

Discipline

• BIOCHEMISTRY: BIOCHEMISTRY

• Publisher: Scientific Publishing House „DARWIN”
• Journal: World News of Natural Sciences
• Year: 2020
• Volume: 33
• Pages: 48-63

Contributors

author

Daniel Omeodisemi Omokpariola

• Environmental Chemistry Unit, Pure and Industrial Chemistry Department, Nnamdi Azikiwe University, Awka, Nigeria

author

Joy Njoku Otuosorochi

• Department of Chemistry, School of Physical Sciences, Federal University of Technology, Owerri, Nigeria

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• Document Type: article