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    Wyświetlanie 1-4 z 4
    Tytuł:
    Adsorption of Congo Red Dye Using Rice Husk
    Autorzy:
    Omokpariola, Daniel Omeodisemi
    Otuosorochi, Joy Njoku
    Powiązania:
    https://bibliotekanauki.pl/articles/1031769.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Congo red
    Freundlich model
    Langmuir models
    Rice husks powder
    Van’t Hoff equation
    adsorption
    kinetics
    thermodynamics
    Opis:
    The potential of rice husks powder (RHP), for the removal of Congo red 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 CR 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 33.88 mg/g for the adsorption of CR dye. The kinetic data conformed to the pseudo second order kinetic model. Thermodynamic quantities such as Gibbs free energy (ΔGº), enthalpy (ΔHº) 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.
    Źródło:
    World Scientific News; 2020, 150; 22-38
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Batch Adsorption Studies on Rice Husk with Methyl Violet Dye
    Autorzy:
    Omokpariola, Daniel Omeodisemi
    Otuosorochi, Joy Njoku
    Powiązania:
    https://bibliotekanauki.pl/articles/1031501.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Rice husks powder
    adsorption
    kinetics
    methyl red dye
    methyl violet
    thermodynamics
    Opis:
    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.
    Źródło:
    World News of Natural Sciences; 2020, 33; 48-63
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of phytochemical constituents of Methanol extract of Moringa oleifera Lam. whole leaf by Gas Chromatography-Mass Spectrometry and Fourier transform infrared spectroscopy analysis
    Autorzy:
    Okechukwu, Victor Uchechukwu
    Eze, Sunday Onyekwere
    Omokpariola, Daniel Omeodisemi
    Okereke, Janefrancess Chinemerem
    Powiązania:
    https://bibliotekanauki.pl/articles/1031420.pdf
    Data publikacji:
    2021
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    FT-IR analysis
    GC-MS analysis
    Moringa oleifera
    methanol extract
    phytochemical constituents
    Opis:
    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.
    Źródło:
    World News of Natural Sciences; 2021, 37; 18-30
    2543-5426
    Pojawia się w:
    World News of Natural Sciences
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Ionic composition of rainwater from different sampling surfaces across selected locations in Rivers State, Nigeria
    Autorzy:
    Omokpariola, Daniel Omeodisemi
    Nduka, John Kanayochukwu
    Omokpariola, Patrick Leonard
    Omokpariola, Elshalom Chioma Onomeda
    Powiązania:
    https://bibliotekanauki.pl/articles/1031790.pdf
    Data publikacji:
    2020
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Anions
    Cations
    Nigeria
    Rainwater quality
    Rivers State
    Opis:
    This study seeks to assess the impact of pH from an array of ions interactions in rainwater samples across different sampling surfaces (ambient, zinc roof, aluminium roof, asbestos roof and stone-coated roof) and locations (Ogale, Eleme, Rumuodomaya/Rumuodome, Obio-Akpor, Diobu, Port-Harcourt and Chokocho, Etche) in Rivers State, Nigeria. Rainwater were sampled from April, 2019 to October, 2019, prepared and analysed for pH, Cl¯, SO42–, NO3¯, NO2¯, PO43–, HCO3¯, Na+, K+, Mg2+, Ca2+, NH4+ and Al3+.using standard procedure. Statistical and Factor analysis was estimated to give ionic impacts on rainwater quality. The results showed that pH across different sampling surfaces ranged from 6.26 – 7.02 with decreasing location as Rumuodomaya/Rumuodome > Diobu > Chokocho > Ogale which impacts on different cation and anion interactions. Factor analysis showed cumulative variance of 88.79% for ambient, 87.58% for zinc roof, 86.49% for aluminium roof, 89.57% for asbestos roof and 65.89% for stone-coated roof across all four locations which are due to industrial and biomass emission, agricultural, metabolic and mining activities on chemical composition. Therefore,
    Źródło:
    World Scientific News; 2020, 150; 132-147
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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