Syed Muhammad Salman, Muhammad Zahoor, Afsheen, Latif-ur-Rahman, Farman Ali, Hizbullah Khan, Muhammad Wahab, Qaisar Khan, Rozina, Riaz Ullah, Essam A. Ali, Muhammad Naveed Umar, Abdul Waheed Kamran
{"title":"Melia Azedarach Sawdust-Based Activated Carbon, an Efficient Adsorbent for the Removal of Heavy Metals From Water","authors":"Syed Muhammad Salman, Muhammad Zahoor, Afsheen, Latif-ur-Rahman, Farman Ali, Hizbullah Khan, Muhammad Wahab, Qaisar Khan, Rozina, Riaz Ullah, Essam A. Ali, Muhammad Naveed Umar, Abdul Waheed Kamran","doi":"10.1002/kin.70001","DOIUrl":"https://doi.org/10.1002/kin.70001","url":null,"abstract":"<div>\u0000 \u0000 <p>Herein, an efficient adsorbent was prepared at high temperature using sawdust of <i>Melia azedarach</i> plant. The prepared adsorbent was characterized by instrumental techniques like EDX, XRD, SEM, FTIR, TGA, and surface area analyzer. The fabricated activated carbon (AC) was used as an adsorbent for the removal of Pb<sup>2+</sup> Ni<sup>2+</sup>, and Cu<sup>2+</sup> from aqueous solution utilizing batch adsorption approaches. At pH 6, the highest elimination of Pb<sup>2+</sup> and Cu<sup>2+</sup> was achieved, whereas for Ni<sup>2+</sup> the optimum pH was 5. The recorded time interval for reaching equilibrium was 60 min in the case of Pb<sup>2+</sup> and Ni<sup>2+</sup> metal, whereas 80 min in the case of Cu<sup>2+</sup> ion. The adsorbent was found to be more effective at high doses, with an optimum dose of 0.05 g. The isotherm models, including Langmuir, Freundlich, Temkin, Jovanovich, and Harkins-Jura models, were utilized to decide the best fit model for explaining the isotherm adsorption data. Out of the tested models, the Langmuir model was more effective with high <i>R</i><sup>2</sup> values of 0.997, 0.991, and 0.984, respectively, for Pb<sup>2+</sup>, Ni<sup>2+</sup>, and Cu<sup>2+</sup> ions. The pseudo-second order model best fitted the kinetics data with high <i>R</i><sup>2</sup> values of 0.980, 0.991, and 0.987 correspondingly, for the mentioned ions. The estimated ∆H° values were −22.699, −31.147, and −33.199 J·mol<sup>−1</sup> respectively for Pb<sup>2+</sup>, Ni<sup>2+</sup> and Cu<sup>2+</sup>, indicated the process to be an exothermic one. The favorable nature of the studied adsorption was obvious from the recorded negative values of Gibbs free energy. The fabricated AC could thus be considered as an efficient and cheap alternative to commercially available activated carbon; however, further confirmation and validation of the present findings by other researchers is mandatory.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 9","pages":"541-552"},"PeriodicalIF":1.5,"publicationDate":"2025-06-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714779","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Alireza Aghili, Amir Hossein Haghighi, Amir Hossein Shabani
{"title":"New Integral Method for the Combined Kinetic Analysis (ICKA) of Condensed Phase Reactions Using Truncated Šesták–Berggren Model","authors":"Alireza Aghili, Amir Hossein Haghighi, Amir Hossein Shabani","doi":"10.1002/kin.70000","DOIUrl":"https://doi.org/10.1002/kin.70000","url":null,"abstract":"<div>\u0000 \u0000 <p>The truncated Šesták–Berggren (TSB) model has been demonstrated to reliably predict the conversion function of standard reaction models. However, when applying the TSB model to thermal analysis of condensed phase reactions using the integral method, an integration emerges that lacks an analytical solution. This integral can be expressed using special functions like the incomplete beta function and the Gaussian hypergeometric function. The integral method offers the capacity to utilize raw kinetic data directly, thereby obviating the potential for errors arising from the calculation of instantaneous reaction rates with noisy experimental data. In this study using a special function, we have developed a new integral method for combined kinetic analysis of simple reactions under nonisothermal conditions, enabling the estimation of kinetic parameters, including the activation energy, pre-exponential factor, and TSB-form of conversion function through a trial-and-error procedure with linear regression. The validity of the new approach was tested by applying it to the kinetic data of a simulated reaction and the thermal decomposition of poly(methyl methacrylate), yielding results closely matching those obtained using differential method. Furthermore, we provided GNU Octave/MATLAB codes for users to calculate TSB model coefficients for standard reaction models in both differential and integral forms, as well as to estimate kinetic parameters of reactions using their own kinetic data.</p></div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 9","pages":"530-540"},"PeriodicalIF":1.5,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714846","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Theoretical Kinetics Study of the OH + CH3SH Reaction Based on an Analytical Full-Dimensional Potential Energy Surface","authors":"Joaquin Espinosa-Garcia, Cipriano Rangel","doi":"10.1002/kin.21796","DOIUrl":"https://doi.org/10.1002/kin.21796","url":null,"abstract":"<p>Based on a recently developed full-dimensional analytical potential energy surface, named PES-2024, which was fitted to high-level ab initio calculations, three different kinetic theories were used for the computation of thermal rate constants: variational transition state theory (VTST), quasi-classical trajectory theory (QCT) and ring polymer molecular dynamics (RPMD) method. Temperature dependence of the thermal rate constants, branching ratios and kinetic isotope effects (KIEs) for the C1 (methyl-H-abstraction process) and C2 paths (thiol-H-abstraction process) of the OH + CH<sub>3</sub>SH polyatomic gas-phase hydrogen abstraction reaction were theoretically determined within the 200–1000 K temperature range, except the RPMD values which were only reported at the highest temperature by computational limitations. We found that while the overall thermal rate constants obtained with the VTST theory show a V-shaped temperature dependence, with a pronounced minimum near 600 K, the QCT and RPMD dynamics theories question this abrupt change at high temperatures. At 1000 K, where the RPMD theory is exact, the VTST and QCT methods overestimate the RPMD results, which is associated with the consideration of recrossing effects. In general, the theoretical KIEs depicted a “normal” behavior for the C1 (values close to unity) and C2 paths in the OH+CH<sub>3</sub>SH/OH+CH<sub>3</sub>SD reactions, and an “inverse” behavior in the OH+CH<sub>3</sub>SH/OD+CH<sub>3</sub>SD reactions for both paths. Finally, the discrepancies between theory and experiment were analyzed as a function of several factors, such as limitations of the kinetics theories and the potential energy surface, as well as the uncertainties in the experimental measurements.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 9","pages":"520-529"},"PeriodicalIF":1.5,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/kin.21796","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714745","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Miu G. Mach, Anne Wolf, Bianca Krumm, Felix Poschen, Christian Kühn, Matthias Olzmann
{"title":"Experimental Kinetic Study of the Reactions of Hydroxyl Radicals With Three Oxymethylene Ethers and With 1,3,5-Trioxane, Tetrahydrofuran, and Tetrahydrofuran-d8","authors":"Miu G. Mach, Anne Wolf, Bianca Krumm, Felix Poschen, Christian Kühn, Matthias Olzmann","doi":"10.1002/kin.21794","DOIUrl":"https://doi.org/10.1002/kin.21794","url":null,"abstract":"<p>Polyoxymethylene dimethyl ethers, CH<sub>3</sub>O(CH<sub>2</sub>O)<i><sub>n</sub></i>CH<sub>3</sub> with <i>n</i> ≥ 1 (abbreviated in the literature also as OME-<i>n</i>, PODE<i>n</i>, POMDME<i>n</i>, or OMDME<i>n</i>) are currently discussed as renewable fuels. Despite fuel + OH reactions are crucial for the combustion chemistry and atmospheric degradation of fuels, experimental kinetic data on OME-<i>n</i> + OH do not exist in the literature for <i>n</i> > 1; only estimated or theoretically calculated values are available. In the present work, we present an experimental kinetic study of the reactions OH + OME-2 and OH + OME-3. For verification and comparison, identical experiments were also performed on the somewhat better-known reactions of OH with OME-1 and with the cyclic ethers 1,3,5-trioxane (TRI, C<sub>3</sub>H<sub>6</sub>O<sub>3</sub>) and tetrahydrofuran (THF, C<sub>4</sub>H<sub>8</sub>O) as well as its perdeuterated isotopologue (THF-d8, C<sub>4</sub>D<sub>8</sub>O). Rate coefficients were determined as a function of temperature and pressure in slow-flow reactors with the pulsed laser photolysis/laser-induced fluorescence technique. The experiments were performed at temperatures between 250 and 520 K and pressures ranging from 0.2 to 5 bar (OME-2), 0.2 to 10 bar (OME-3), 0.2 to 0.9 bar (OME-1, TRI), and 0.2 to 0.8 bar (THF, THF-d8) with helium as bath gas. No significant pressure dependence of the rate coefficients was observed. The generally very weak temperature dependences are parameterized in Arrhenius form. Structural influences on reactivity are discussed and compared with predictions from structure-reactivity relationships.</p>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 8","pages":"497-506"},"PeriodicalIF":1.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/kin.21794","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473197","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Physicochemical Investigation of the Properties of Functionalized Oligomeric Silsesquioxanes as Pseudophase in Aqueous Medium","authors":"Laguta Anna, Zhykhareva Anastasiia, Mchedlov-Petrossyan Nikolay, Gumenna Mariana, Stryutsky Oleksandr, Shevchenko Valery","doi":"10.1002/kin.21795","DOIUrl":"https://doi.org/10.1002/kin.21795","url":null,"abstract":"<div>\u0000 \u0000 <p>Colloidal solutions of ionic liquids extend the concepts of surface science. Cationic oligomeric silsesquioxanes formed the silsesquioxane core and cationic organic substituents, namely OSS(C<sub>3</sub>N<sup>+</sup>Br<sup>−</sup>)<sub>n</sub> and OSS(C<sub>10</sub>N<sup>+</sup>Br<sup>−</sup>)<sub>n</sub>, are amorphous with a glass transition temperature below 0°C and possess prerequisites for the formation of supramolecular aggregates in aqueous solutions. The hydrodynamic size and zeta potential values of colloidal species were determined by dynamic and electrophoretic light scattering. The local surface potential and acidity were estimated by the spectrophotometric study of acid-base equilibria of bound bromophenol blue. The kinetic effect of these colloidal species in the idea of micellar rate effect emphasizes the importance of the “diverting” effect of cationic head groups introduced recently. The nanospecies morphology, size, and charge densities vary with the length of the alkyl substituent of OSS. This modification opens up potentially broader applications of cationic oligomeric silsesquioxanes, which are synthesized as ionic liquids. The behavior in an aqueous solution determines the future environmental fate of the ionic liquids, which are defined as environment-friendly compounds, basically as non-volatile and non-flammable.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 9","pages":"511-519"},"PeriodicalIF":1.5,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144714778","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Snehal S. Latpate, Vivek V. Antad, Sachin R. Kate, Vitthal T. Borkar
{"title":"A Quantitative Insight of Substituent Effect in Terms of Reactivity and Nucleophilicity in Rapid Aqueous Iodinations of Monosubstituted Benzene Derivatives Employing Hydrodynamic Voltammetry","authors":"Snehal S. Latpate, Vivek V. Antad, Sachin R. Kate, Vitthal T. Borkar","doi":"10.1002/kin.21792","DOIUrl":"https://doi.org/10.1002/kin.21792","url":null,"abstract":"<div>\u0000 \u0000 <p>Reactivity and nucleophilicity are enlightening aspects of the substituent effect (SE) in most aromatic electrophilic and nucleophilic substitution reactions. Herein, we have quantitatively delved into the reactivity of some monosubstituted benzene derivatives having either an electron donating or withdrawing substituent by exploring the real time progress of their rapid aqueous iodinations at pH 7.4 using iodine solutions devoid of iodide ions chronoamperometrically, employing hydrodynamic voltameter (HV) reinforced with a sensitive Keithley 2450 Digital Source Meter (KDSM). All the reactions are studied in purely aqueous medium using micromolar quantities of reactants, wherein green chemistry principles are adhered, ensuring sustainable development. Voltammograms of the substrates in the reactions were acquired to evince their reduction propensities, these being a quantitative measure of their nucleophilicities. The reactivity of these substrates was evidenced in terms of their specific reaction rates, half-lives, energies of activation, and entropies of activation, while their nucleophilicities were revealed in terms of the half-wave potentials. Unanticipated concomitant kinks in reactivity and nucleophilicity trends have been observed, and a linear mathematical correlation between them has been established in the reactions studied.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 8","pages":"487-496"},"PeriodicalIF":1.5,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473035","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Kinetics of Tautomerization Reactions of Trithiocyanuric Acid at Low Temperatures","authors":"Judith Würmel, John M. Simmie","doi":"10.1002/kin.21793","DOIUrl":"https://doi.org/10.1002/kin.21793","url":null,"abstract":"<div>\u0000 \u0000 <p>Photochemical irradiation of tri-thiocyanuric acid at low temperatures results in the formation of a higher energy isomer, the tri-thiol 1,3,5-triazine-2,4,6-trithiol [Rostkowska Journal of Physical Chemistry A 109 (2005): 2160]. The question arises as to how, and whether, the latter can revert to its parent 1,3,5-triazine-2,4,6-trithione in a reasonable time at temperatures of 10–300 K. Quantum chemical calculations using both density functional and wave function theories attempt to compute the kinetics of the return voyage. We show that reactivity is dominated by hydrogen atom tunneling and conformational changes, calculated from variational transition state theory allied to small-curvature tunneling effects, rather than purely thermal reactions, and that there is no way back during the usual laboratory lifetimes. Both water and methanol are shown to act as catalysts by both accepting and donating hydrogen atoms, reducing the barrier to reaction by more than one-half and enhancing the reaction rate, with methanol being the more effective agent.</p></div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 8","pages":"479-486"},"PeriodicalIF":1.5,"publicationDate":"2025-05-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Effect of Hydrogen Bonding Interaction on Kinetics of Cyclopentanol Reaction With Hydroperoxyl Radical at Atmospheric and Combustion Temperatures: A Theoretical Study","authors":"Yaozong Duan, Fashe Li, Hua Wang","doi":"10.1002/kin.21790","DOIUrl":"https://doi.org/10.1002/kin.21790","url":null,"abstract":"<div>\u0000 \u0000 <p>The reaction kinetics of hydrogen abstractions from cyclopentanol by hydroperoxyl radical have been comprehensively studied using multistructural canonical variational transition state theory with small curvature tunneling approximation (MS-T-CVT/SCT). The barrier heights and reaction energies have been calculated at the CCSD(T)/cc-pVDZ and CCSD(T)/cc-pVTZ levels of theory with basis set corrections from MP2/cc-pV<i>n</i>Z (where <i>n</i> = D, T, and Q), based on the geometries optimized with the M06-2X/6-311+G(2df,2p) method. The rate coefficients of different hydrogen abstraction sites (α-carbon, β-carbon, γ-carbon, and OH) have been calculated by direct dynamics based on M08-HX/jun-cc-pVTZ electronic structure calculations, as this model chemistry shows the lowest averaged mean unsigned error relative to the benchmark CCSD(T) method. The reaction barrier heights for hydrogen abstraction from various sites follow the order of α-carbon < γ-carbon < β-carbon < OH and follow the order of C─H and O─H bond dissociation energies. Kinetic results suggest that the multistructural torsional anharmonicity, tunneling, and hydrogen bonding interaction are important influential factors for calculating accurate rate coefficients and branching ratios. Hydrogen abstraction reaction from α-carbon site shows the largest contribution to the overall rate coefficients below 1100 K, beyond which hydrogen abstraction reactions from β-carbon and γ-carbon sites become dominant. Hydrogen bonding interaction involved in the transition states significantly reduces the reaction barrier heights and accelerates the single-structural rate coefficients at lower temperatures, but has only a marginal impact on the overall and site-specific MS-T-CVT/SCT rate coefficients, except for the hydrogen abstraction reaction from β-carbon site. However, hydrogen bonding interaction influences the MS-T-CVT/SCT branching ratios. The thermodynamic properties of cyclopentanol and four derived fuel radicals are calculated using the atomization method together with the multistructural partition functions. The simulated auto-ignition reactivity of cyclopentanol/air mixtures is sensitive to the newly calculated rate coefficients and thermodynamic parameters, especially at low temperatures.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 8","pages":"461-478"},"PeriodicalIF":1.5,"publicationDate":"2025-05-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144473028","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Muhammad Junaid, Rizwan Ali, Abdul Qadir Ahmad, Muhammad Amjad Riaz, Mahmood Basil A. AL-Rawi, Muhammad Ibrar, Mohammed El-Meligy, Irfan Ullah Khan
{"title":"Antimicrobial Potential of Green Synthesized Silver Nanoparticles From the Fruit of Azadirachta indica a High-Valued Medicinal Plant","authors":"Muhammad Junaid, Rizwan Ali, Abdul Qadir Ahmad, Muhammad Amjad Riaz, Mahmood Basil A. AL-Rawi, Muhammad Ibrar, Mohammed El-Meligy, Irfan Ullah Khan","doi":"10.1002/kin.21791","DOIUrl":"https://doi.org/10.1002/kin.21791","url":null,"abstract":"<div>\u0000 \u0000 <p>The activity and stability of nanoparticles synthesized from plants; green-synthesized nanoparticles are obtaining more consideration from scientists. This work aimed to synthesize the green silver nanoparticles (AgNPs) using the fruit extract of <i>Azadirachta indica</i> A. Juss. The fruit extract acts as both a capping and reducing agent. The physicochemical properties of synthesized nanoparticles were studied through x-ray diffraction (XRD), FT-IR, UV-vis, scanning electron microscopy (SEM), and EDX. Furthermore, antioxidant properties and antibacterial activity of the nanoparticles were also studied. The reaction was preceded under sunlight, and the color of the reaction mixture changed from colorless to dark brown, indicating the production of Ag nanoparticles. A UV-vis analysis revealed an absorption peak of 429 nm, which was measured after 30 min of reaction. The XRD spectroscopy results suggest that the nanoparticles are crystalline with an average diameter of 36.50 µm. SEM images show that the majority of the AgNPs are spherical and fairly distributed. The obtained AgNPs showed efficient antibacterial activity against gram-negative (<i>Escherichia coli</i>) and gram-positive (<i>Staphylococcus</i>) bacterial species. Surprisingly, the synthesized Ag nanoparticles from <i>A. indica</i> fruit by the DPPH assay method show 55% antioxidant activity.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 8","pages":"455-460"},"PeriodicalIF":1.5,"publicationDate":"2025-05-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144472909","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Yasmeen Madeeh Abdel-Fatah, Tarek Ali Elbarbary, Ibrahim Ahmed Ibrahim
{"title":"Kinetic Studies of Copper Leaching From E-Waste Using Organic Acids","authors":"Yasmeen Madeeh Abdel-Fatah, Tarek Ali Elbarbary, Ibrahim Ahmed Ibrahim","doi":"10.1002/kin.21788","DOIUrl":"https://doi.org/10.1002/kin.21788","url":null,"abstract":"<div>\u0000 \u0000 <p>The hydrometallurgy processing of copper from electronic waste (e-waste) by citric and malic acids was studied as a friendly leaching process. Influencing factors, for example, contact time, temperature, pulp density, and acid concentration, were studied. These studies revealed that 98.07% of copper can be dissolved by using 0.5 g e-waste/100 mL of 3% citric acid at 70°C for 15 h. Whereas, 100% can be leached by using 0.5 g/100 mL of 1% malic acid at 80°C for 20 h. Also, the mechanism of leaching by these acids was studied and found that the leaching process is performed by acidification and complexion reactions. Finally, kinetic studies of copper leaching were studied using the modified shrinking core models.</p>\u0000 </div>","PeriodicalId":13894,"journal":{"name":"International Journal of Chemical Kinetics","volume":"57 7","pages":"446-451"},"PeriodicalIF":1.5,"publicationDate":"2025-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144135538","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"化学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}