Chelating Effect of Mixed Ligand Complexes Containing an Aminopenicillin Drug and Imidazole Derivatives in Physiological Conditions
Local Beneficiation of Zimbabwean Petalite Concentrate: A Cost-Effective Route to Battery Grade Lithium Carbonate through Hydrometallurgy
UV Absorption Spectra, NLO Properties and HOMO-LUMO Analysis of N - (4 -CHLORO -3 - CYANO - 7 - ETHOXY - 6 QUINOLINYL) ACETAMIDE by Density Functional Theory
The Development of Rechargeable Cells and Batteries and Their Impact on the Environment
Lignin Nanoparticles as Froth Flotation Collectors for Platinum Group Mineral Ore - A Review
Microwave Assisted Vacuum Drying of Thompson Seedless Grapes: Analysis of Characteristics And Kinetic Modelling
Yeast Recovery in Batch Ethanol Fermentation
Adsorption and Characterization of Anisaldehyde as Corrosion Inhibitor for Aluminium Corrosion in Hydrochloric Acidic Environment
The Repercussion of Leachate from Industries on Water Quality in Jeedimetla Village and its Surroundings, Medchal-Malkajgiri District, Telangana
Production of Modified Carboxymethyl Cellulose from Sawdust and Wheat Straw
Optimisation of Microfabricated Devices for Neural Circuit Modelling
Exploring the Stability and Synthetic Applications of Chiral Methylmetals in Asymmetric Organic Reactions
Production of Modified Carboxymethyl Cellulose from Sawdust and Wheat Straw
The Role of Educational Software in Chemistry: Teaching a Case Study on Interactive Learning
Lignin Nanoparticles as Froth Flotation Collectors for Platinum Group Mineral Ore - A Review
pH metric studies on the mixed ligand complex systems involving an amino penicillin drug, ampicillin (amp), as ligand (A) and ligands containing imidazole moieties such as Imidazole (him), Benzimidazole (bim), Histamine (hist), and Histidine (his) as ligands (B) at 37oC and I = 0.15 M (NaClO ) reveal the presence of ZnABH, ZnAB, ZnAH B and ZnAB . The proton in the ZnABH species is attached to ligand A. In the mixed ligand complexes, the ligand, amp (A), binds the metal ion through the oxygen atom of the carbonyl group and amino nitrogen. In the ZnAB/ZnAB2 species the binding of the ligands A and B is similar to their binding in their respective binary complexes. In the deprotonated species ZnAH-1B, deprotonation occurs in the ligand amp (A). The ZnAB (B = hist/his)/ZnAB2 (B = him/bim) species in all these systems were isolated, and the analytical data confirm its formation. Non-electrolytic behavior and monomeric types of chelates have been assessed from their low conductance values. The vibrational spectral data were interpreted to find the mode of binding of ligands to metal. The thermal behavior of complexes was studied by TG/DTA. The antimicrobial activity and CT DNA cleavage of the complexes show higher activity for mixed ligand complexes.
The rising demand for Lithium-ion batteries in electric vehicles and energy storage systems has elevated Lithium to the status of a strategic mineral. Zimbabwe, with its significant reserves of petalite, is well-positioned to contribute to this value chain. This study investigates the hydrometallurgical production of battery-grade Lithium carbonate from Zimbabwean petalite, focusing on both technical feasibility and economic viability. The process involved is Calcination, leaching, and precipitation of Lithium carbonate. A yield of 91.5% and purity exceeding 99.4% were achieved. Economic modeling indicates a production cost of approximately USD 1,100 per ton, significantly below current global market prices of USD 12,000–15,000 per ton. The study confirms that local beneficiation is not only technically feasible but economically advantageous, supporting downstream development and industrial policy initiatives.
The present work deals with UV absorption spectra of N-[4-chloro-3-cyano-7-ethoxy-6-quinolinyl] acetamide in methanol, ethanol, and acetone. The computational UV spectra is obtained by density functional theory (DFT) using the B3LYP/6-311++G(d,p) basis set, and the absorption wavelengths calculated are compared with experimental values. DFT calculations are used to calculate the energy of the highest occupied molecular orbital (HOMO) and the lowest unoccupied molecular orbital (LUMO). The non-linear optical (NLO) properties, like hyperpolarizability, are calculated by DFT at the B3LYP/6-311++G(d,p) basis set.
This research studies the definition, invention, history, development, and future of rechargeable battery technology, as well as the environmental impacts they have had on the world. Key stages in the development of rechargeable batteries are noted, from the invention of the “Voltaic Pile” by Alessandro Volta in the 1790s through to modern developments such as lithium-ion and lithium-polymer batteries. Developing technologies, such as lithium sulphur batteries are assessed in comparison to current batteries as to whether they are viable and what the obstacles are in terms of their development. Modern rechargeable battery technology is assessed in terms of environmental impact to determine whether they are actually a viable solution to disposable batteries and fossil fuels or whether they cause more harm to the environment.
Platinum group metals are noble metals that exist in different geological settings with different mineralogies. Of the different mineralogies, sulphide ores are the main source. To separate valuable particles from gangue material, the froth flotation method is used. Since not all ores are sulphides, some non-sulphide ores also exist, depending on the geological location. Some sulphides may also be chemically altered to produce mineral complexes with different mineralogies that are not easily floated with conventional collectors. Complexity of mineralogy together with decreasing ore grade reduces the efficiency of the conventional collectors. Currently used collectors for sulphide ores are not environmentally friendly. In a way to reduce mineral losses from the use of conventional collectors, several studies have been done on the use of nanoparticles as alternatives. Although there are no trials that have been done on platinum group minerals, nanoparticles have been shown to have higher recoveries than xanthate collectors. Of the nanoparticles studied, lignin has been shown to reduce negative environmental impact by up to 10%. When functionalized, lignin particles can be used as collectors. The particles will have to be prepared so that they do not agglomerate, as it is a major challenge in nanoparticles.
