Journal of the Iranian Chemical Society最新文献

{"title":"An introspection of modern adsorption technique for efficient scavenging of pollutants from water","authors":"Shipra Sagar,&nbsp;Nidhi Kandulna,&nbsp;Soumen Dey","doi":"10.1007/s13738-025-03272-2","DOIUrl":"10.1007/s13738-025-03272-2","url":null,"abstract":"<div><p>Inorganic and organic contaminants in water body cause enough harm to the living systems with varying degree. Proper addressing the issue with sustainable solutions is on the prime focus. Various groups in last decade have contributed significantly with diversified class of materials using multi-faceted techniques. This review examines and compares the significant research works that have enhanced the field of wastewater treatment. Recent additions of smart phytomagnetic bio-composites are also introduced. Relative adsorption efficiencies in working condition have been mentioned. Agricultural and synthetic adsorbents have been critically assessed to rank their suitability in small and large scale usage. The pros and cons of various techniques have been outlined. Future perspective is also mentioned.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1805 - 1824"},"PeriodicalIF":2.3,"publicationDate":"2025-09-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145164564","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":"Solvent-assisted dispersive solid-phase extraction based on salen as a new and efficient sorbent followed by GC-FID for determination of polycyclic aromatic hydrocarbons in water, food, and soil samples","authors":"Sajede Sadat Mousavi,&nbsp;Abolfath Shahsavani,&nbsp;Zolfaghar Aladaghlo,&nbsp;Ali Reza Fakhari","doi":"10.1007/s13738-025-03274-0","DOIUrl":"10.1007/s13738-025-03274-0","url":null,"abstract":"<div><p>In this study, a solvent-assisted dispersive solid-phase extraction (SA-DSPE) method followed by a gas chromatography equipped with a flame ionization detector (GC-FID) was applied for the extraction and determination of some polycyclic aromatic hydrocarbons (PAHs) in various real samples. <i>N</i>,<i>N</i>′-bis(salicylidene)ethylenediamine (salen), as a sorbent, was simply synthesized and characterized. Under the optimal conditions (solution pH: 6.0, amount of sorbent: 0.5%, disperser solvent type: acetonitrile, disperser solvent volume: 500 µL, and centrifugation condition: 3743 g for 3 min), preconcentration factors and extraction recoveries for PAHs were obtained ranging from 140 to 183 and 70 to 92%, respectively. Linear dynamic ranges were from 2.0 to 200.0 ng mL⁻¹ with the regression coefficients (<i>R</i>²) exceeding 0.99, limits of detection from 0.6 to 0.9 ng mL⁻¹, and the repeatability values (RSD%) ≤ 8.4% (<i>n</i> = 5). The proposed method can be effectively applied for extracting and determining PAHs in both food and environmental samples.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"2005 - 2014"},"PeriodicalIF":2.3,"publicationDate":"2025-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163771","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":"Synthesis of pyridines and pyrazols derivatives using an engineered ionic-liquid-based nanomagnetic catalyst","authors":"Elahe Ahmadi,&nbsp;Tahereh Akbarpour,&nbsp;Ardeshir Khazaei,&nbsp;Mahsa Mohammadi,&nbsp;Atefeh Gorji","doi":"10.1007/s13738-025-03270-4","DOIUrl":"10.1007/s13738-025-03270-4","url":null,"abstract":"<div><p>This study focuses on the design and synthesis of a magnetic heterogeneous catalyst using fluorescent carbon quantum dots (CQDs) as a sustainable support material. This approach addresses the challenges associated with the difficult catalyst separation and functionalization of iron oxide nanoparticles. The core–shell support, named Fe₃O₄@CQD@Si(CH₂)₃NH@CC@Ad, was developed to load a maximum amount of acid groups (–SO₃H) onto the support. The core is composed of magnetic Fe₃O₄, while the outer shell is composed of functionalized CQDs. The synthesized catalyst was characterized to confirm its structure and properties. The efficiency of this nanocatalyst was then evaluated in the synthesis of 2-amino-3-cyano pyridines and 4,4′-(aryl methylene) bis(3-methyl-1<i>H</i>-pyrazol-5-ol)s derivatives using a multi-component reaction (MCR). Reactions conducted with the magnetic nanocatalyst under optimized conditions resulted in reasonable yields within a short duration. The authors suggest that the high immobilization of the –SO₃H groups on the Fe₃O₄@CQD@Si(CH₂)₃NH@CC@Ad support was favored by the aggregation of the –NH groups. This aggregation promoted the catalytic efficiency and activity of the catalyst by increasing the availability of acidic active sites. The overall results indicate that the designed catalyst maintains a relatively high level of efficiency even after several cycles of use. This robustness and the sustained catalytic activity highlight the catalyst’s potential for practical applications in various industrial processes.</p><h3>Graphic Abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1969 - 1990"},"PeriodicalIF":2.3,"publicationDate":"2025-09-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145163153","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":"Comprehensive analysis of magnesium nitrate–urea coordination compounds: synthesis, characterization, and applications","authors":"Zulfiya Djumanazarova,&nbsp;Shakhnoza Kadirova,&nbsp;Nuritdin Kattayev,&nbsp;Muslum Demir,&nbsp;Elyor Berdimurodov,&nbsp;Ambrish Singh,&nbsp;Adeyinka Sikiru Yusuff,&nbsp;Omar Dagdag,&nbsp;Avni Berisha,&nbsp;Ilyos Eliboev","doi":"10.1007/s13738-025-03275-z","DOIUrl":"10.1007/s13738-025-03275-z","url":null,"abstract":"<div><p>The present study shows the successful synthesis and characterization of the magnesium nitrate–urea coordination compound, Mg(NO₃)₂·4CO(NH₂)₂·2H₂O, using a mechanochemical method, achieving an 84.0% product yield. Elemental analysis confirmed the compound’s composition, with magnesium (5.02% found vs. 5.08% calculated), nitrogen (29.44% vs. 29.66%), carbon (10.11% vs. 10.17%), and hydrogen (4.08% vs. 4.23%). X-ray diffraction patterns revealed a distinct crystalline structure, corroborated by significant shifts in the IR spectra, indicating successful coordination of urea with magnesium nitrate. Thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC) analysis identified three endothermic and two exothermic effects, with a total mass loss of 76.5%, leading to the formation of magnesium oxide. The crystalline structure of the compound, analyzed via X-ray diffraction, exhibited a unique hexagonal coordination involving acetamide and water molecules. The compound demonstrated significant potential as a plant growth enhancer, increasing wheat root length by 169.2% and stem height by 117.8% at a 0.00001% concentration. Molecular docking studies indicated strong binding affinities with cancer-related proteins 1JNX and 1X2J, with docking scores of −4.40 kcal/mol and −7.30 kcal/mol, respectively. ADME analysis revealed high water solubility and moderate lipophilicity (consensus Log Po/w of −2.47), along with high gastrointestinal absorption, making it a promising candidate for oral drug administration. Hirshfeld surface analysis highlighted significant hydrogen bonding interactions, constituting 45.9% and 7.6% of the crystal packing for O–H/H–O and N–H/H–N interactions, respectively. Energy framework analysis demonstrated robust intermolecular interactions, with the strongest interaction energy recorded at − 51.41 kJ × mol^− 1. Small-plot experiments on cotton further validated the compound’s effectiveness, showing an increased yield of raw cotton from 22.4 g per plant in control to 32.5 g per plant. Detailed analysis of coordination bond lengths and crystal parameters confirmed the compound’s unique structural characteristics, with unit cell parameters for triclinic crystals determined as <i>a</i> = 10.683(1) Å, <i>b</i> = 10.9615(9) Å, <i>c</i> = 13.5156(11) Å, <i>α</i> = 97.726(7)°, <i>β</i> = 105.798(8)°, <i>γ</i> = 98.315(7)°, and a calculated density of 1.342 g/cm³. These findings underscore the promising applications of Mg(NO₃)₂·4CO(NH₂)₂·2H₂O in both agricultural productivity and potential drug development.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"2015 - 2030"},"PeriodicalIF":2.3,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145171698","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":"2D MXene-based photocatalysts for efficient water splitting and hydrogen evolution: a brief review","authors":"C. B. Subba,&nbsp;Prasad Mattipally,&nbsp;J. Sivakumar,&nbsp;A. Laref,&nbsp;A. Yvaz,&nbsp;D. P. Rai,&nbsp;Z. Pachuau","doi":"10.1007/s13738-025-03273-1","DOIUrl":"10.1007/s13738-025-03273-1","url":null,"abstract":"<div><p>Photocatalytic water splitting offers a viable and sustainable method for hydrogen production. MXenes, a class of 2D transition-metal carbides/nitrides, have emerged as potential photocatalysts and cocatalysts due to their tunable electronic properties, high conductivity, and surface functionality. This review explores recent advances in MXene-based photocatalysts for hydrogen production, discussing their synthesis, electronic structures, and photocatalytic mechanisms. The key challenges, including stability issues, charge recombination, and bandgap optimisation, are critically analysed. Finally, future research directions are outlined to improve MXene-based systems for large-scale hydrogen production.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1825 - 1848"},"PeriodicalIF":2.3,"publicationDate":"2025-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145170070","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":"Green and sensitive stability-indicating spectrofluorimetric assay method for the determination of donepezil HCl in pure and tablet dosage form and its kinetic application","authors":"Tooba Khan,&nbsp;Zubair Anwar,&nbsp;Muneeba Usmani,&nbsp;Sofia Ahmed,&nbsp;Muhammad Ali Sheraz,&nbsp;Tania Mirza,&nbsp;Mohsin Hassan Saeed,&nbsp;Jun-Hee Na","doi":"10.1007/s13738-025-03263-3","DOIUrl":"10.1007/s13738-025-03263-3","url":null,"abstract":"<div><p>Donepezil HCl (DH) is commonly used for the treatment of different neurological disorders such as dementia, Alzheimer’s, and Parkinson’s diseases. So far, there is no stability-indicating spectrofluorimetric assay method for the estimation of DH that has been reported. Therefore, this study aims to develop and validate a green and eco-friendly stability-indicating spectrofluorimetric assay method for the estimation of DH in pure, dosage form, and degraded solutions. The green and eco-friendly spectrofluorimetric method was developed and validated by the International Council on Harmonization guidelines, and the parameters mentioned in the guidelines were studied. The maximum pH for the fluorescence intensity of DH has been studied in the pH range 1.0–14.0, and found that from pH 1.0 to 8.0, there is no considerable difference in the fluorescence intensity of DH. Therefore, pH 7.0 was selected for the assay of DH, and the p<i>K</i>_a value was determined as 8.20. The calibration curve for DH is linear in the 0.50–3.50 × 10^–5 M concentration range. The accuracy and precision of the method are in the range of 100.07–100.70% and 0.57–0.65% (%RSD), respectively. The limit of detection (LOD) and quantification (LOQ) are found to be 0.89 and 2.71 × 10^–6 M, respectively. Stress degradation studies were also carried out on DH and found that the degradation products formed were not altering the accurate and precise determination through the proposed method.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1863 - 1878"},"PeriodicalIF":2.3,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167804","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":"Kinetic modeling and toxicological assessment of Eriochrome Black T dye: enhanced adsorptive approach using novel ZrO2/Pisum Sativum nanocomposites","authors":"Muhammad Imran Kanjal,&nbsp;Majid Muneer,&nbsp;Saif Ullah,&nbsp;Mubashara Fayyaz,&nbsp;Raziya Nadeem,&nbsp;Muhammad Irfan Ahamad,&nbsp;Rana Muhammad Zulqarnain,&nbsp;Mohamed A. Habib,&nbsp;Ahmed B. M. Ibrahim","doi":"10.1007/s13738-025-03271-3","DOIUrl":"10.1007/s13738-025-03271-3","url":null,"abstract":"<div><p>The presence of synthetic dyes in wastewater, particularly Eriochrome Black T (EBT), poses a significant environmental challenge due to their toxic and persistent nature in water. This study investigates the use of biomass from <i>Pisum sativum</i> (garden pea), biochar, ZrO₂ nanoparticles (ZrO₂ NPs), and a composite of ZrO₂ and <i>Pisum sativum</i> (ZrO₂ NCs) for effectively removing EBT dye from aqueous solutions. The novel ZrO₂ NCs were synthesized and characterized using analytical techniques like scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) to study the morphology and functional group elucidation, respectively. The dye removal efficiency was tested under various experimental conditions, including different initial dye concentrations, pH levels, catalyst dosages, and contact times. Results showed that ZrO₂ NCs performed exceptionally well, demonstrating a synergistic effect and outperforming the individual materials. Under optimal conditions—pH 5, a 10 mg/L dye solution, 0.25 g adsorbent dosage, and a contact time of 720 min—92.65% of the dye was removed. To ensure that the treated wastewater was safer, toxicity assessments were conducted. The brine shrimp lethality test and hemolytic assay revealed significant reductions in toxicity, with 75.28 and 85.56% reductions, respectively. Additionally, the Ames test showed a reduction in mutagenicity, with 70.43 and 73.31% reductions for the TA98 and TA100 bacterial strains, respectively, after the treatment with ZrO₂ NCs. Kinetic studies indicated that the process followed the pseudo-second-order kinetics. This research underscores the potential of combining nanotechnology with biomass-derived materials to create sustainable and efficient solutions for dye removal, providing a promising method for wastewater treatment applications.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1991 - 2004"},"PeriodicalIF":2.3,"publicationDate":"2025-08-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145167080","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":"Poly-glutamic acid-modified green-synthesized ZnO nanoparticles and carbon composite paste electrode for the electrochemical detection of adenosine","authors":"Kanthappa Bhimaraya,&nbsp;Jamballi G. Manjunatha,&nbsp;Amrutha Balliamada Monnappa","doi":"10.1007/s13738-025-03260-6","DOIUrl":"10.1007/s13738-025-03260-6","url":null,"abstract":"<div><p>This study presents the synthesis of zinc oxide nanoparticles (ZnO-NPs) using Acalypha wilkesiana leaves for electrochemical applications, specifically for “adenosine” (ADS) detection. “Adenosine”, a key molecule in cellular signalling and physiological homeostasis, is widely studied in biomedical research and diagnostics. The study investigates the simultaneous detection of ADS, “adenine” (AD), with L-tyrosine (TS) using a novel electro-polymerized glutamic acid (PGA)-modified “ZnO-NPs” composite carbon paste electrode (PGA/ZnO-NPs/CPE) and unmodified “ZnO-NPs/CPE” in 0.2 M phosphate buffer saline (PBS) at a scan rate of 0.1 V/s. The synthesized “ZnO NPs” were characterized by X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDX), and electrochemical impedance spectroscopy (EIS) techniques. The surface morphologies of the CPE, MCPE, “ZnO-NPs”, “ZnO-NPs/CPE”, and “PGA/ZnO-NPs/CPE” were examined using scanning electron microscopy (SEM). Different voltammetric techniques were used, including cyclic voltammetry (CV), differential pulse voltammetry (DPV), linear sweep voltammetry (LSV), and electrochemical impedance spectroscopy (ESI), to assess the electrochemical performance of the electrode. The “PGA/ZnO-NPs/CPE” sensor introduces a novel hybrid platform that combines poly-glutamic acid (PGA) with zinc oxide nanoparticles (ZnO-NPs) on carbon paste electrode (CPE) for enhanced electrochemical sensing. These unique composite exhibits improved electron transfer, increased surface area, and excellent biocompatibility, enabling high sensitivity and selective detection of ADS. The proposed sensor exhibits a significant improved concentration variation range for ADS of 20–500 µM (CV), 50–650 µM (DPV), and 20–500 µM (LSV), with a limit of detection (LOD) of 0.21 µM CV, 0.40 µM DPV, and 0.25 µM LSV and a limit of quantification (LOQ) 0.87 µM, 0.93 µM, and 0.84 µM, and sensitivity of ADS is 0.975 A/M/cm². The scan rate varied from 0.025 to 0.400 V/s, it indicating an adsorption-controlled process. Moreover, the modified sensor demonstrated good reproducibility, repeatability, and stability, making it sensitive and selective method for ADS detection and suitable for pharmaceutical applications.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 8","pages":"1769 - 1787"},"PeriodicalIF":2.3,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145062252","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":"The adsorption performance optimization of alkali-activated metakaolin geopolymeric microsphere on dye in fixed-bed column","authors":"Janani Karuppaiyan,&nbsp;A. Mullaimalar,&nbsp;R. Jeyalakshmi","doi":"10.1007/s13738-025-03267-z","DOIUrl":"10.1007/s13738-025-03267-z","url":null,"abstract":"<div><p>In this present work, a spherical geopolymer composite was produced using metakaolin geopolymer and an optimized ratio of calcium alginate (AL1G) biopolymer. The calcium alginate bead was subsequently modified through peroxide treatment (AL1G_H). FTIR, SEM with EDX were conducted to study the microstructural characteristics. SEM–EDX analysis revealed that the spheres were composed of a collection of geopolymer particles bound together by calcium alginate, which functions as glue, where the external surface was uneven and rough. Removal of methylene blue (MB) dye stuff was investigated in an inverse flow reactor in a continuous mode of operation at various flow rates (5–15 mL/min), column height (3–7 cm), and primary concentrations of the dye (10–30 mg/L). To make a comparison between the capacities of the adsorbent materials and one another, the performance of the inverse flow configuration from break through behavior was used. The column parametric study demonstrated that higher adsorption capacity on AL1G_H at 12 mg/g was observed under the following optimal conditions: pH: 7, C_o: 10 mg/L, flow rate: 5 mL/min, and bed height: 7 cm. The best fit obtained from Thomas model, followed by Clark adsorption models, demonstrated a greater correlation in nonlinear form of porous spherical geopolymer bead (AL1G_H), the adsorption capacity (<i>q</i>₀) 11.9 mg/g, area of the breakthrough curve A value 69.9, and <i>R</i>² value 0.9981. The adsorption mechanism was discussed from the perspectives of the molecular structure of composite beads, interaction between composite and MB dye, with the driving force mainly from electrostatic interaction and multisite chemisorption while slight physisorption. This study provides a green and sustainable pathway for the preparation, application, and subsequent processing of clay-based geopolymeric adsorbents for continuous flow operations in environmental areas.</p><h3>Graphical abstract</h3>\u0000<div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1913 - 1929"},"PeriodicalIF":2.3,"publicationDate":"2025-08-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165595","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":"Amino-functionalized grafted cross-linked chitosan beads for the efficient adsorption of Pb2+ and Cu2+ ions in a synthetic media: equilibrium, kinetic, thermodynamic, and desorption study","authors":"E. Igberase,&nbsp;I. G. Mkhize","doi":"10.1007/s13738-025-03262-4","DOIUrl":"10.1007/s13738-025-03262-4","url":null,"abstract":"<div><p>Chitosan enhancement is essential for establishing an improved adsorbent and binding toxic heavy metal ion. In this investigation, chitosan powder was converted to chitosan beads (CH) for effortless handling and easy penetration into binding sites. The beads were cross-linked with glutaraldehyde, which made them insoluble in acidic media. The cross-linked beads (CCH) were then further grafted with an amino-functionalized solution (5-amino-1,10-phenanthroline) to provide more binding sites. The three sets of chitosan derivatives produced were characterized by Fourier Transform Infrared (FTIR), Scanning Electron Microscope (SEM), Thermogravimetric (TGA), X-ray diffraction (XRD), and BET analysis. The grafted cross-linked chitosan beads (GCCH) were applied in adsorption studies to remove Pb²⁺ and Cu²⁺ ions from the synthetic solutions. The equilibrium experiment data were explained using the Langmuir and Freundlich models, while the kinetics data were studied using pseudo-first- and pseudo-second-order kinetic models. A thermodynamic study was carried out, and the parameters from the study, such as Gibb’s free energy change (∆<i>G</i>^O), enthalpy change (∆<i>H</i>^O), and entropy change (∆<i>H</i>^O), were obtained. The Langmuir model reasonably described the equilibrium data well, with a correlation coefficient (<i>R</i>²) of 0.99 for both metal ions and a maximum binding capacity of 376 mg/g and 348 mg/g for Pb²⁺ and Cu²⁺ ions, respectively. The pseudo-second-order kinetic model gave the line of best fit with an <i>R</i>² value of 0.97. The results from the thermodynamic study showed that binding Pb²⁺ and Cu²⁺ ions onto the adsorbent is endothermic and spontaneous. The spent adsorbent was regenerated with five successive cycles. The study thoroughly covers equilibrium, kinetics, thermodynamics, and desorption, providing insights into adsorption mechanisms. The modified chitosan beads offer increased selectivity, stability, and reusability, making the adsorbent a potential material for heavy metal removal. This method improves adsorption performance while advancing sustainable water treatment.</p></div>","PeriodicalId":676,"journal":{"name":"Journal of the Iranian Chemical Society","volume":"22 9","pages":"1849 - 1862"},"PeriodicalIF":2.3,"publicationDate":"2025-08-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s13738-025-03262-4.pdf","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145165107","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}