Research Article
Martynia annua and Balanite Endocarp Activated Carbons to Remove Hg2+ and Pb2+ in Prepared Solutions Using Fixed-Bed Adsorption Column
Abdulhalim Musa Abubakar*,
Yusufu Luka,
John Sylvester Lebnebiso,
Abuh David,
Moses NyoTonglo Arowo
Issue:
Volume 11, Issue 6, November 2023
Pages:
102-116
Received:
26 October 2023
Accepted:
14 November 2023
Published:
26 December 2023
Abstract: Mercury (Hg) and lead (Pb) exposures to humans are sometimes from water bodies, which may damage the liver, kidneys, reproductive and developmental systems, immune, nervous, cardiovascular systems and can pass from the lungs to the bloodstream thereby affecting the oxygen carrying ability of the blood. As a result, this research seeks to produce a distinct activated carbon (AC) from Balanite aegyptiaca fruit endocarp (BAE) and Martynia annua fruits (MAF) via 4 methodological steps including reagent preparation, feedstock impregnation, carbonization and chemical activation using KOH at 600°C, to adsorbed Pb and Hg ions (Pb2+ & Hg2+) from an artificially prepared aqueous water solution. Proximate analysis, especially a fixed carbon and carbon yield contents of 97.68 and 87.62% for BAE and 94.94 and 91.97% for MAF initially reveals the potentials of the raw materials for AC production. Apart from 0.0017 equal porosity of ACs generated that portrays a low adsorption effect, surface areas of 1015.37 and 1080.15 m2/g for BAE-AC and MAF-AC respectively, are high and within the standard range. Flow controllers to release the solution whose initial metallic ion concentration is 0.313 g/mL, was made to operate at 1.67, 4.2, 7.42, 9.86, 11.56 and 13.33 mL/s in a locally built 13cm bed height continuous fixed-bed column. Findings shows that breakthrough curves from Bohart-Adams model and the purely empirical Freundlich isotherm parameters collectively signals a great potential of BAE and MAF for the adsorption of Pb2+ and Hg2+, making their ACs a viable resource for purifying contaminated water.
Abstract: Mercury (Hg) and lead (Pb) exposures to humans are sometimes from water bodies, which may damage the liver, kidneys, reproductive and developmental systems, immune, nervous, cardiovascular systems and can pass from the lungs to the bloodstream thereby affecting the oxygen carrying ability of the blood. As a result, this research seeks to produce a ...
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Research Article
Theoretical Study of the Global Reactivity and Theoretical Characterization of the Preferential Sites of Reactivity of Five Derivatives of Tetrathiafulvalene
Fatogoma Diarrassouba*,
Affoué Lucie Bédé,
Mabintou Kalo,
Konan Charly Kouadio,
Kafoumba Bamba,
Nahossé Ziao
Issue:
Volume 11, Issue 6, November 2023
Pages:
117-124
Received:
24 November 2023
Accepted:
12 December 2023
Published:
26 December 2023
Abstract: In this work, which had the general objective of carrying out a theoretical study of the overall reactivity and a theoretical characterization of the preferential sites of reactivity of certain Tetrathiafulvalene (TTF) derivatives, we can now retain that: The higher the conductivity of these transfer complexes charge (TTF-TCNQ) increase, the more the polarity of the TTF donor molecules increases. For the TTF_4 and TTF_5 molecules, the values of the determined reactivity quantities are approximately equal. This clearly shows that the TTF_4 and TTF_5 molecules have similar chemical reactivity properties. The substitution of the methyl group (–CH3) by a hydrogen atom (–H) in the TTF_4 molecule does not substantially influence the reactive properties. This could explain the equality of the experimental difference between the first oxidation and second oxidation potentials (〖∆E〗_exp=0,23 V) for these two molecules. A decrease in the conductivity of charge-transfer complexes was also observed as the chemical reactivity of TTF increased. The choice of these two basic molecules significantly impacts the electrical conductivity of the charge transfer complexes (TTF-TCNQ). The nucleophilic sites of the molecules are the sulfur atoms of the central TTF core while the electrophilic sites are the carbon atoms of the bulky substituent. These different potential sites of reactivity can constitute the dimerization sites of these molecules with a view to extending the conjugation.
Abstract: In this work, which had the general objective of carrying out a theoretical study of the overall reactivity and a theoretical characterization of the preferential sites of reactivity of certain Tetrathiafulvalene (TTF) derivatives, we can now retain that: The higher the conductivity of these transfer complexes charge (TTF-TCNQ) increase, the more t...
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Research Article
Study on Safety Risk and Overall Safety Improvement of Chemical Industrial Park
Issue:
Volume 11, Issue 6, November 2023
Pages:
125-129
Received:
5 August 2023
Accepted:
25 September 2023
Published:
28 December 2023
Abstract: As an important supporting base for the national chemical economy, chemical industrial parks face the current situation of lack of coordinated planning, scattered layout of chemical enterprises, and insufficient supporting infrastructure. In order to reduce safety risks in chemical industrial parks, improve safety control and emergency response capabilities, this article conducts research on the overall safety improvement of chemical industrial parks from the aspects of closed management of chemical industrial parks, hazardous chemical transportation roads, hazardous chemical parking lots, fire control, and intelligent safety supervision. It provides a solution for building an advanced domestic chemical industrial park with intelligent control and complete supporting facilities, and realizes the coordinated development of safety improvement and green development in chemical industrial parks.
Abstract: As an important supporting base for the national chemical economy, chemical industrial parks face the current situation of lack of coordinated planning, scattered layout of chemical enterprises, and insufficient supporting infrastructure. In order to reduce safety risks in chemical industrial parks, improve safety control and emergency response cap...
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