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Research Article
Use of a Clay from Southern Ivory Coast (Bingerville) for the Adsorption of Methyl Orange in Aqueous Media
Koné Yetchié Tchonrontcha,
Abollé Abollé,
Kambiré Ollo*
,
Bonito Aristide Karamoko
Issue:
Volume 13, Issue 2, June 2024
Pages:
28-34
Received:
21 January 2024
Accepted:
24 February 2024
Published:
17 April 2024
Abstract: Increasing levels of textile dyes being discharged into the environment as industrial waste represent a serious threat to human health, life, resources and ecological systems. It is therefore necessary to treat wastewater from textile industries before discharging it into the environment. The aim of this project is to eliminate methyl orange (MO) from textile industry wastewater using clay from Bingerville (Ivory Coast). The clay used was characterized by Scanning Electron Microscopy, Brunauer-Emmett-Teller and pH of Zero Charge. MO concentration was monitored using a UV-visible spectrophometer. Characterization of the clay by SEM and BET showed that our clay is microporous. The study showed that the surface of our clay has a pH of zero. Adsorption of methyl orange on our clay reaches adsorption equilibrium in 60 minutes. The adsorption model corresponds to the pseudo-order 2 kinetic model. Two adsorption isotherm models (Langmuir and Freundlich) are applicable to the adsorption of our dye on clay. This implies that the dye adsorption process on our clay is governed by a bimolecular process involving a collision between an active site on the clay and a dye molecule. Bingerville clay can be used to effectively treat dye-contaminated wastewater, since the maximum adsorbed quantity is equal to 58.139 mg g-1. The best adsorption rate was obtained in acid medium (pH = 2.26) with an adsorption rate of 91.84%.
Abstract: Increasing levels of textile dyes being discharged into the environment as industrial waste represent a serious threat to human health, life, resources and ecological systems. It is therefore necessary to treat wastewater from textile industries before discharging it into the environment. The aim of this project is to eliminate methyl orange (MO) f...
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Review Article
Opinion — On a New Mechanistic Model Toward the Catalytic Reactions: From Hydrogen Combustion to Fischer-Tropsch Reaction
Youyi Sun*
Issue:
Volume 13, Issue 2, June 2024
Pages:
35-42
Received:
28 April 2024
Accepted:
11 May 2024
Published:
24 May 2024
DOI:
10.11648/j.ajpc.20241302.12
Downloads:
Views:
Abstract: Mechanism research in catalytic chemistry is both fascinating and confusing, particularly when it comes to solid-state catalysts, the nature of catalytic behaviours has been unidentified so far. For a mechanistic model to be acceptable, it should have an ability to explain all unique aspects of a given catalytic reaction and provide an illuminating explanation to a widely range of catalytic reaction. In our recent reports, a new mechanistic model was suggested for catalytic CO2 reduction reaction on Cu metal and hydrogen evolution reaction on various transition metals, which provides a reasonable interpretation to both catalytic reactions (from the diversity of product distribution and catalytic behaviour of various metals). Here, it is expected to extend this new mechanistic model to a wider range of catalytic reactions over various catalysts. Such as hydrogen combustion with Cu metal adding, oxidation of SO2 by O2 to give SO3 with NO adding, conversion of CO and NO into CO2 and N2 with Ru metal adding, and hydrogeneration of propylene with Pt metal adding. Importantly, this model seems also to pertain to the mechanism of the Fischer-Tropsch (T-F) reaction, i.e. the conversion of CO and H2 to hydrocarbons, principally a mixture of linear alkanes (including methane) and alkenes, by passage over various heterogeneous transition-metal catalysts (Fe, Co, Ni et.al.).
Abstract: Mechanism research in catalytic chemistry is both fascinating and confusing, particularly when it comes to solid-state catalysts, the nature of catalytic behaviours has been unidentified so far. For a mechanistic model to be acceptable, it should have an ability to explain all unique aspects of a given catalytic reaction and provide an illuminating...
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Research Article
Utilizing the Hartree-Fock Method to Analyze Carbon Dioxide Molecule
Enass Hammadi Hasan,
Saad Naji Abood*
Issue:
Volume 13, Issue 2, June 2024
Pages:
43-49
Received:
30 April 2024
Accepted:
28 May 2024
Published:
13 June 2024
Abstract: The determination of the ground state of the carbon dioxide molecule is conducted through matrix Hartree-Fock computations for a polyatomic molecule. Utilization of basis sets is implemented to achieve a precision that approaches the sub-μ Hartree of the CO2 molecule for the energy levels. Utilizing a 28s14p14d14f atom-centered and a 24sl0plld bond-centered Gaussian basis set, the upper limit for the Hartree-Fock ground state energy of CO2 at its practical picture has been calculated, yielding a value of -187.125408 Hartree. Utilizing our knowledge in diatomic molecules, we approximate the precision of this measurement to fall within 5-6 μ Hartree. The current computations offer a methodology to assess the precision of different basis sets frequently utilized in molecular self-consistent field investigations. These basis sets encompass STOJG, 4-31G, 6-31G, 6-31G(3d), 6-31IG, 6-311+G(3d0, D95, and D95V+(3d)), alongside cc-pVDZ, uug-cc-pVDZ, cc-pVTZ, and aug-cc-pVTZ, which have been proposed for the purpose of investigating electron correlation. We have recently performed calculations on the CO1 ground state at the nuclear geomevy employed in the presenl work using the basis sets proposed by Dunning and co-workers and designated cc-pVQZ. aupcc-pVQZ, cc-pVSZ and nupcc-pVSZ. The estimated basis set truncation emrs for these sets are 0.00371, 0.003 19, 0.00047 and 0.00039 Hartree respectively.
Abstract: The determination of the ground state of the carbon dioxide molecule is conducted through matrix Hartree-Fock computations for a polyatomic molecule. Utilization of basis sets is implemented to achieve a precision that approaches the sub-μ Hartree of the CO2 molecule for the energy levels. Utilizing a 28s14p14d14f atom-centered and a 24sl0plld bond...
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Research Article
Equilibrium, Kinetics and Thermodynamics Studies of Cadmium (II) Ion Adsorption on to Anchote Peel (Coccinia abyssinica Peel) Activated Carbon Adsorbent
Issue:
Volume 13, Issue 2, June 2024
Pages:
50-58
Received:
24 April 2024
Accepted:
27 May 2024
Published:
25 June 2024
Abstract: Powdered Activated Carbon Adsorbent produced from Anchote peel (Coccinia abyssinica peel). Powdered Activated Carbon Adsorbent was investigated for its adsorption capacity for Cadmium (II) ion. Effects of parameters: pH, contact time, adsorbent dose, initial metal ion concentration, and temperature on adsorption of Cadmium (II) ion were investigated. The best adsorption of Cadmium (II) ion occurred at pH 5, where the adsorption reached equilibrium within 210 min. for the optimum 0.025 mg/l initial Cadmium (II) ion concentration. Kinetic studies of the data showed that the adsorption follows the pseudo second order kinetic model where equilibrium adsorption capacities and adsorption rate increased at optimum level for all parameter. Fourier Transform Infra Red spectra of activated carbon adsorbent & Cadmium (II) ion loaded adsorbent were obtained. The enthalpy of Cadmium (II) ion adsorption was -71.986 J/mol. The negative enthalpy of adsorption indicated an exothermic nature of the adsorption. The equilibrium data better fitted Freundlich isotherm models within the temperature range 20 °C – 45 °C. Maximum adsorption efficiency of adsorbent was 98.3% of Cadmium (II) ion at pH 5 and optimum contact time 210 min., adsorbent dose 0.25 g and initial conc. 0.025 mg/l respectively. The maximum adsorption capacity of Anchote (Coccinia abyssinica) peel activated carbon adsorbent was observed to 89.273 mg/g of Cadmium (II) ion at 30 °C and 5 mg/l.
Abstract: Powdered Activated Carbon Adsorbent produced from Anchote peel (Coccinia abyssinica peel). Powdered Activated Carbon Adsorbent was investigated for its adsorption capacity for Cadmium (II) ion. Effects of parameters: pH, contact time, adsorbent dose, initial metal ion concentration, and temperature on adsorption of Cadmium (II) ion were investigate...
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