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Batch Adsorption Studies on Rice Husk with Methyl Violet Dye

100%

Omokpariola D. O., Otuosorochi J. N.

World News of Natural Sciences

2020

vol. 33

48-63

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.

Evaluation of phytochemical constituents of Methanol extract of Moringa oleifera Lam. whole leaf by Gas Chromatography-Mass Spectrometry and Fourier transform infrared spectroscopy analysis

81%

Okechukwu V. U., Eze S. O., Omokpariola D. O., Okereke J. C.

World News of Natural Sciences

2021

vol. 37

18-30

The research study evaluated the phytochemical constituents of Methanol extracts of Moringa oleifera whole leaf by Gas Chromatography-Mass Spectrometry (GC-MS) and Fourier transform infrared spectroscopy (FT/IR) analysis. The leaves was washed, air dried for 2 weeks, then ground into a fine powder and extracted using methanol by maceration for 24 hours using standard procedures. After the contact time elapsed, the solvent filtered to recover the extract. The functional groups and the chemical constituents of the methanol extract of Moringa oleifera leaves investigated using Fourier transform infrared spectroscopy (FT/IR) and Gas Chromatography-Mass Spectrometry (GC-MS) respectively. The FT/IR analysis confirmed the presence of O-H, C=C, C-H, C-O, CH3 and C=C-H bond stretching functional groups, which indicates that the substance is an aliphatic alcohol, ester, aldehyde and carboxylic acid. However, the fingerprint region had a pattern that is specific for every molecule, the presence of -OH function and N-O stretch; suggest that or alcohols and nitrogen or aromatic or aliphatic phenols containing molecules are major components of the Moringa oleifera leaf studied. GC-MS analysis of the extract reveals the identification of twenty compounds, in which two compounds were identified in each peak. N,N'-Pentamethylenebis[s-3-aminopropyl thiosulfuric acid and 2-Myristynoyl pantetheine (100%), 2-Myristynoyl pantetheine and Deoxyspergualin (92.05%), 5-Octadecenal and 9-Hexadecenoic acid (27.94%). N,N'-Pentamethylenebis[s-3-aminopropyl thiosulfuric acid and Pentetic Acid are the major phytoconstituents. Most of the compounds in the list are bioactive and possess medicinal properties, which further justify the application of Moringa oleifera traditional plant in the discovery of novel therapeutics.

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2 World News of Natural Sciences

1 2021

1 2020

2 Omokpariola D. O.

1 Eze S. O.

1 Okechukwu V. U.

1 Okereke J. C.

1 Otuosorochi J. N.

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Batch Adsorption Studies on Rice Husk with Methyl Violet Dye

Evaluation of phytochemical constituents of Methanol extract of Moringa oleifera Lam. whole leaf by Gas Chromatography-Mass Spectrometry and Fourier transform infrared spectroscopy analysis