Chemistry Africa

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Spent Chinese Green Tea as an Adsorbent for Simultaneous Removal of Potentially Toxic Metals from Aqueous Solution
Chemistry Africa - Tập 5 - Trang 2107-2114 - 2022
Abudu Ballu Duwiejuah, Y. Amadu, B. H. R. Gameli, A-A. Bawa, Z. A. Imoro, S. M. Alidu, A. Z. Imoro
Spent wastes are inexpensive, abundantly available, and environmentally friendly and can be introduced into wastewater to remove toxic metals. This study sought to utilise spent Chinese green tea leaves to simultaneously remove cadmium (Cd), chromium (Cr), mercury (Hg) and lead (Pb) from an aqueous solution. Batch experiments were performed in binary systems with different initial metal concentrat...... hiện toàn bộ
Molecular Dynamics Simulation Reveals a Change in the Structure of Liquid Water Near 150 °C, which May Explain Apparent Anomalies in High-Temperature Water Radiolysis
Chemistry Africa - Tập 6 - Trang 375-381 - 2022
J. G. G. Ndongo Assomo, S. Ebrahimi, Y. Muroya, J.-P. Jay-Gerin, A. Soldera
SPC/E molecular dynamics simulations are used to examine the structure of liquid water as a function of temperature between 25 and 350 °C at a constant pressure of 25 MPa. Analysis of the calculated oxygen–oxygen (O–O) and oxygen-hydrogen (O–H) radial distribution functions shows that water undergoes a structural change around 150 °C, characterized by large drops in the O–O/O–H coordination number...... hiện toàn bộ
4f–4f Spectral Study and Calculation of Energy Interaction Parameters for Interaction of Nd3+ with Different Solvents
Chemistry Africa - Tập 6 Số 1 - Trang 335-343 - 2023
Himani Tiwari, Charu Chandra Dhondiyal, Tara Datt Bhatt, . Hema
Investigating Leaching Parameters for Enhanced Rare Earth Elements Sustainability and Recovery from Phosphogypsum
Chemistry Africa - - 2024
Raouf Jebali, Khaled Brahmi, Sana Ncib, Elimame Elaloui, Wided Bouguerra
Substantial volumes of phosphogypsum (PG) are generated globally as a by-product in phosphoric acid production, categorizing it as a widespread waste. Managing such substantial amounts of PG poses challenges due to its composition containing various pollutants, including persistent rare earth elements (REEs) with non-biodegradable characteristics. Conversely, an encouraging approach for valorizing...... hiện toàn bộ
Simultaneous Removal of Copper and Lead from Industrial Effluents Using Corn Cob Activated Carbon
Chemistry Africa - Tập 6 - Trang 733-745 - 2022
N’guessan Louis Berenger Kouassi, Koffi Pierre Dit Adama N’goran, Luc Dou Blonde, Donourou Diabate, Trokourey Albert
The purpose of this study was to investigate the adsorption of Pb2+ and Cu2+ from aqueous solution in single and binary systems, and from industrial effluents by corn cob-activated carbon. To achieve this goal, the synthesis of activated carbon was optimized. The significant factors influencing the adsorption process namely the contact time, initial concentration of Pb and Cu ions, solution pH, an...... hiện toàn bộ
Recycling of Alum Sludge for Rhodamine B Removal from Industrial Effluents
Chemistry Africa - Tập 6 - Trang 485-498 - 2022
N’guessan Louis Berenger Kouassi, Bi Irié Hervé Gouré Doubi, Donourou Diabate, Luc Dou Blonde, Trokourey Albert
Water contamination by rhodamine B is a threat to human health and aquatic biota due to its toxicity, persistence, and non-biodegradability. However, there is little data available on rhodamine B removal from real effluents by alum sludge. This study investigated rhodamine B removal from industrial effluents using alum sludge. The alum sludge was characterized by ICP-AES, SEM, FTIR, and XRD. The r...... hiện toàn bộ
Removal of Toxic Chromium Ions in Aqueous Medium Using a New Sorbent Based on rGO@CNT@Fe2O3
Chemistry Africa - Tập 5 - Trang 1809-1821 - 2022
Balla Fall, Cheikh Gaye, Matar Niang, Yakubu Adekunle Alli, Abdou Karim Diagne Diaw, Modou Fall, Sabu Thomas, Hyacinthe Randriamahazaka
A facile hydrothermal route is investigated to prepare a new sorbent based on rGO@CNT@Fe2O3. The synthesis is easy and does not involve complex chemistry. The as prepared sorbent are characterized by scanning electron microscopy (SEM), X-ray diffraction, Raman spectroscopy, and Fourier transform infrared spectroscopy (FTIR). Chromium ions adsorption capacity of sorbent reaches 91.7 mg/g at contact...... hiện toàn bộ
Isosalipurposide: A Promising Analgesic, Anti-inflammatory and Gastroprotective Agent Isolated from the Flowers of Acacia cyanophylla
Chemistry Africa - Tập 4 Số 3 - Trang 483-490 - 2021
Ghribi, Lotfi, Deghrigue, Monia, Znati, Mansour, Bouraoui, Abderrahman, Ben Jannet, Hichem
The importance of the Acacia genus is due to its usage in nutrition, and in folk and modern medicine. They are considered as promising sources of bioactive metabolites displaying beneficial to human health. The chemical and biological investigation of some Acacia species helped in the design of food supplements and drugs. A. cyanophylla has been introduced in Tunisia mainly to rehabilitate rangela...... hiện toàn bộ
Optimization of Binary Mixtures of Biodiesel and Fossil Diesel for Clean Energy Combustion
Chemistry Africa - Tập 2 - Trang 507-515 - 2019
Bornes C. Mosonik, Joshua K. Kibet, Silas M. Ngari
There is an urgent interest initiated to develop clean energy resources with the aim of reducing exposure to environmental pollutants and explore model fuels that can hasten the achievement of clean energy combustion. This work investigates various ratios of biodiesel and commercial diesel in order to propose model binary fuels for clean energy combustion. Accordingly, diesel blends of ratios 1:1,...... hiện toàn bộ
Phytochemical analysis, neuroprotective, anticholinesterase, cytotoxic and catalase potentials of Opuntia microdasys var. rufida and Opuntia leptocaulis
Chemistry Africa - - 2021
Meriem Jouini, Mabrouk Horchani, Afifa Zardi‐Bergaoui, Mansour Znati, Anis Romdhane, Stéphanie Krisa, Pierre Waffo-Téguo, Hichem Ben Jannet
Tổng số: 635   
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