Journal of chemical technology and biotechnology最新文献

{"title":"Examining mixotrophic fermentation in fed-batch mode for C1-gas valorization","authors":"Marina Fernández-Delgado,&nbsp;Pedro Enrique Plaza,&nbsp;M Teresa García-Cubero,&nbsp;Susana Lucas,&nbsp;Mónica Coca,&nbsp;Juan Carlos López-Linares","doi":"10.1002/jctb.7874","DOIUrl":"https://doi.org/10.1002/jctb.7874","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>C1-gases like CO and CO₂, significant contributors to climate change, offer the potential for sustainable bioconversion into valuable products. The study explored mixotrophic fermentation using C1-gases in fed-batch mode to improve the production of target compounds, focusing on <i>Clostridium aceticum</i> and <i>Clostridium carboxidivorans</i>. It aimed to overcome the limitations of conventional gas fermentation (autotrophic fermentation and without fed-batch mode) and assess the potential of mixotrophic substrates for enhancing yields.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Results showed that mixotrophic fermentation with fructose as a co-substrate led to higher microbial growth in <i>C. aceticum</i>, increasing acetic acid (1200 <i>versus</i> 600 mg L⁻¹) and ethanol (600 <i>versus</i> 0 mg L⁻¹) production, compared to autotrophic fermentation. For <i>C. carboxidivorans</i>, constant CO consumption occurred in autotrophic and mixotrophic fermentation. Mixotrophic fermentation with fructose and C1-gases by <i>C</i>. <i>carboxidivorans</i> significantly boosted microbial growth and metabolic activity, increasing butanol (1600 <i>versus</i> 0 mg L⁻¹) and butyric acid (2400 <i>versus</i> 1800 mg L⁻¹) production, compared to autotrophic fermentation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The study highlights mixotrophic fermentation's potential to enhance C1-gas valorization. It provides insights into microbial behavior under varied substrate conditions, contributing to sustainable biomanufacturing practices for biofuel and high-value bioproducts. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 7","pages":"1453-1462"},"PeriodicalIF":2.8,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7874","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264697","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Optimized size and stability of composite CuO–ZnO metal oxide nanoparticles for efficient removal of Reactive Black 5 dye","authors":"Shanza Shafaat,&nbsp;Nasira Hussain,&nbsp;Zeeshan Abbasi,&nbsp;Lotfi Ben Tahar,&nbsp;Muhammad Usman,&nbsp;Ambreen Sarfraz,&nbsp;Asad Muhammad Khan,&nbsp;Rafaqat Ali Khan,&nbsp;Faiz Rabbani,&nbsp;Muhammad Bilal,&nbsp;Ahson Jabbar Shaikh","doi":"10.1002/jctb.7867","DOIUrl":"https://doi.org/10.1002/jctb.7867","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The increasing contamination of water bodies with industrial dyes necessitates efficient remediation strategies. CuO–ZnO composite nanoparticles (NPs) have shown promise as adsorbents due to their high surface area, stability, and tunable properties. This study focuses on optimizing the synthesis conditions of CuO-ZnO NPs via a co-precipitation method and evaluating their performance for the removal of Reactive Black 5 (RB5) dye.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>CuO–ZnO composite NPs were synthesized with varied precursor ratios, pH values, temperatures, and reagent addition times to achieve optimal size and stability. Characterization using ultraviolet–visible spectroscopy, fluorescence, X-ray diffraction, Fourier transform infrared spectroscopy, dynamic light scattering, vibrating-sample magnetometry, and Brunauer–Emmett–Teller analysis confirmed the structural, optical, and physical properties of the optimized composite. The smallest size and highest stability for a concentration ratio of 50:50 was obtained at pH 11, 80 °C, and a reagent addition time of 5 min. Composite NPs show ferromagnetic behavior. The adsorption efficiency of RB5 dye was studied under different operational parameters, revealing that maximum removal (92%) occurred at pH 2 with a contact time of 60 min. Adsorption kinetics followed the  pseudo-first-order model, while equilibrium data aligned with the Freundlich isotherm, indicating multilayer adsorption. Thermodynamic analysis confirmed the endothermic and spontaneous nature of the process.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The optimized CuO–ZnO composite NPs demonstrated high efficiency for RB5 dye removal and maintained significant reusability across multiple adsorption–desorption cycles. These findings highlight the potential of CuO–ZnO NPs as an effective and sustainable adsorbent for wastewater treatment. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1346-1365"},"PeriodicalIF":2.8,"publicationDate":"2025-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939658","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Highly selective oxidation of furfural to maleic acid with a Brønsted–Lewis dual-acid system","authors":"Yu Lin,&nbsp;Yuanzhuo Ji,&nbsp;Yizhe Zhang,&nbsp;Hualiang An,&nbsp;Qian Zhao,&nbsp;Xinqiang Zhao,&nbsp;Yanji Wang","doi":"10.1002/jctb.7872","DOIUrl":"https://doi.org/10.1002/jctb.7872","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Maleic acid (MAc) is a high value-added oxygenic hydrocarbon derivative monomer. The synthesis of MAc from biomass-based furfural is a green process and has important academic research value. Herein, selective catalytic oxidation of renewable furfural to MAc was investigated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The effect of using different heteropoly acids as catalyst and different organic acids/H₂O as solvent was evaluated first, and the ‘phosphomolybdic acid + acetic acid/H₂O’ composite system with good performance was screened out. Acetate anion acted as free radical acceptor in the reaction to stabilize furfural radical and inhibit the polymerization reaction. Under optimal reaction conditions, the conversion of furfural was 97.8%, and the MAc yield and selectivity were 58.3% and 59.6%, respectively. To further improve the selectivity of MAc, different kinds of Lewis acids were introduced to construct a Brønsted–Lewis dual-acid catalytic system. When Cu(OAc)₂ was as Lewis acid, the MAc selectivity was significantly improved to 72.5% with a furfural conversion of 72.3%. The catalytic mechanism of Brønsted–Lewis dual-acid system was finally clarified.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>In this complex system, the synergy of Cu and Mo is responsible for the outstanding catalytic efficiency, where the Mo^VI/Mo^V redox can be facilitated by the redox of Cu^II/Cu^I with the assistance of O₂; acetate anion can interact with furfural radicals, thereby delaying the chain reaction of free radicals. This process makes the MAc generation reaction more dominant than the polymerization reaction, thus improving MAc selectivity. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 7","pages":"1434-1443"},"PeriodicalIF":2.8,"publicationDate":"2025-04-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Constructing a visible-active MgO/NiWO4 Z-scheme heterojunction for efficient photodegradation of malachite green","authors":"Pankaj Sharma,&nbsp;Amit Kumar,&nbsp;Tongtong Wang,&nbsp;Pooja Dhiman,&nbsp;Gaurav Sharma,&nbsp;Sahil Rana","doi":"10.1002/jctb.7859","DOIUrl":"https://doi.org/10.1002/jctb.7859","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>This study examines the growing environmental problem of water pollution caused by the release of organic dyes, with a specific focus on harmful malachite green (MG) causing severe health concerns.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A MgO/NiWO₄ heterojunction was synthesized through ultrasonic mixing of MgO and NiWO₄ using the ultrasonication technique. X-ray diffraction, transmission electron microscopy, field emission scanning electron microscopy, photoluminescence spectroscopy and UV–visible spectroscopy were used to study the material's structure, shape and optical features. Photocatalytic experiments were conducted under a xenon lamp to assess the efficiency of the MgO/NiWO₄ heterojunction for the removal of MG dye. The photocatalyst demonstrated enhanced photocatalytic capabilities when MG dye was exposed to light. The photocatalytic degradation mechanism of the system was explained through free radical scavenging experiments. Furthermore, enhanced charge transfer in the heterojunction was confirmed using photoluminescence and electrochemical investigations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>A possible Z-scheme was suggested for the degradation mechanism explaining the charge transport of carriers across the junction. The 1:1 MgO/NiWO₄ catalyst emerged as a promising candidate for photocatalytic degradation of MG dye. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1273-1287"},"PeriodicalIF":2.8,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938922","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Production and characterization of a thermostable endo-β-1,3(4)-glucanase for the combined enzymatic degradation of chitin-glucan to produce prebiotic oligosaccharides from mushroom waste","authors":"Anastasia Klemanska,&nbsp;Ayman Hijazi,&nbsp;Jesper Holck,&nbsp;Francisco Duarte,&nbsp;Kelly Dwyer,&nbsp;Gary Walsh","doi":"10.1002/jctb.7866","DOIUrl":"https://doi.org/10.1002/jctb.7866","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Growing global demand for mushrooms means an increased production of solid mushroom waste (SMW), necessitating novel approaches for waste valorization. Waste stalks and misshapen mushrooms are rich in chitin-glucan polymer – a promising source of prebiotics. Tter16 (EC 3.2.1.6) from <i>Thielavia terrestris</i> was cloned, recombinantly expressed in <i>Pichia pastoris</i>, and biochemically characterized. An enzyme cocktail preparation containing Tter16, two other endo-β-1,3(4)-glucanases (Csph16A and Csph16A-ΔC) and one endo-β-1,6-glucanase (Tvir30) (EC 3.2.1.75), was used to degrade the glucan fraction of fungal chitin-glucan with the aim of valorizing bioactive polymers within commercial mushroom waste.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Tter16 was optimally active at pH 5.0, 50 °C, and hyperthermostable at 50 °C with a D-value of 33 days. The Tm of Tter16 was determined to be 67.77 °C and the substrate specificity analysis revealed a preference for mixed-linkage β-glucans. Tter16 was found to possess one of the highest turnover numbers recorded for noncellulolytic fungal glucanases, with a value of 1221 s⁻¹. The enzyme cocktail yielded oligosaccharides including a β-1,6-linked disaccharide and β-1,3-linked oligosaccharides DP 2–5, while minimizing the production of glucose at &gt;90 min of hydrolysis of chitin-glucan. A small-scale chitin-glucan hydrolysis study resulted in a 242.5 mg yield of soluble sugars per g of substrate (24.3% yield) after 90 min of hydrolysis. These oligosaccharides were found to support the growth of the probiotic <i>Lacticaseibacillus rhamnosus</i> (formerly <i>Lactobacillus rhamnosus</i>) <i>in vitro</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The biochemical properties of Tter16 are well-suited for the intended application of mushroom waste valorization. Enzymatic hydrolysis of chitin-glucan released β-glucooligosaccharides displaying prebiotic potential. To the best of our knowledge, this is the first account of the cooperative enzymatic degradation of chitin-glucan with the aim of liberating prebiotic β-glucooligosaccharides from solid mushroom waste and their subsequent <i>in vitro</i> application testing. © 2025 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1377-1385"},"PeriodicalIF":2.8,"publicationDate":"2025-04-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7866","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"One-step facile synthesis of pomelo peel biochar activated by KOH under air atmosphere for adsorptive removal of methylene blue and oxytetracycline","authors":"Mai Lien Tran,&nbsp;Chi Hieu Nguyen,&nbsp;Thi Tuong Van Tran,&nbsp;Ruey-Shin Juang","doi":"10.1002/jctb.7865","DOIUrl":"https://doi.org/10.1002/jctb.7865","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In this work, a biochar was synthesized from pomelo (<i>Citrus maxima</i>) peel (PBC) which is one of the popular biomass wastes, and enhanced in texture structure and surface-active functional groups via chemical activation with potassium hydroxide (KOH) under air environment. The optimal concentration of KOH solution and pyrolysis temperatures were determined. The morphology and physicochemical properties of the material were investigated by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy and Brunauer–Emmett–Teller analysis. The activated biochar was applied to the removal of methylene blue (MB) and oxytetracycline (OTC) in water samples.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The adsorption of MB and OTC on the prepared biochar obeyed the Langmuir model (<i>R</i>² = 0.9598 and 0.9891, respectively), and the highest adsorption capacity for MB and OTC reached 268.0 and 95.6 mg g⁻¹, respectively. An isotherm study also indicated that MB followed monolayer adsorption while OTC underwent multilayer adsorption. The kinetic results suggest possible adsorption mechanisms involving electrostatic attraction, pore adsorption, hydrogen bonding and <i>π</i>–<i>π</i> interaction. High removal of MB and OTC could be obtained in solutions with a wide range of pH.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The present study revealed that PBC could be prepared under air environment with KOH activation and be an efficient adsorbent for the removal of organic pollutants from wastewater. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1335-1345"},"PeriodicalIF":2.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938842","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Enhanced biodegradation of perchlorate in the presence of FeCl2 and FeCl3","authors":"Ningbo Gao,&nbsp;Lijie Cheng,&nbsp;Lifang Lu,&nbsp;Cui Quan","doi":"10.1002/jctb.7861","DOIUrl":"https://doi.org/10.1002/jctb.7861","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Bioreduction of perchlorate (ClO₄⁻) faces challenges such as slow degradation rates and long start-up periods, greatly limiting their practical application. This study investigated the effects of Fe(II) and Fe(III) at concentrations of 0, 0.1, 0.5, and 1 mmol L⁻¹ on the bioreduction characteristics of ClO₄⁻.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Compared to the control group, the reduction rates of ClO₄⁻ in the Fe(II)-0.1 and Fe(III)-0.1 systems increased by 7.46-fold and 7.24-fold, respectively. Complete degradation of ClO₄⁻ up to 1586.32 ± 18.60 mg L⁻¹ could be achieved within 96 h.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The results demonstrate that the addition of Fe(II) and Fe(III) effectively improves issues such as long start-up periods and slow degradation rates in the bioreduction of ClO₄⁻. The presence of Fe enhances the secretion of cytochrome c on the cell membrane, and the reversible redox reaction between Fe(II) and Fe(III) enhances electron transfer during the ClO₄⁻ reduction process. Furthermore, increased total membrane permeability promotes the absorption and utilization of nutrients by cells, accelerating cellular growth and metabolism. Analysis of the microbial community structure revealed that the addition of Fe(III) favored the abundance of Patescibacteria, Bacteroidota, and Firmicutes, facilitating extracellular electron transfer during high chlorate salt reduction and significantly enhancing the bioreduction efficiency of ClO₄⁻. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1288-1300"},"PeriodicalIF":2.8,"publicationDate":"2025-04-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143938841","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Amoxicillin adsorption onto oil palm trunk-derived activated carbon: synthesis optimization, modelling of mass transfer and ultrasonic regeneration","authors":"Mohamad Firdaus Mohamad Yusop,&nbsp;Mohamad Hafiz Baharudin,&nbsp;Md Mamoon Rashid,&nbsp;Mohammad Mahtab Alam,&nbsp;Mohd Azmier Ahmad","doi":"10.1002/jctb.7864","DOIUrl":"https://doi.org/10.1002/jctb.7864","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Antibiotics such as amoxicillin (AMC) can persist in the environment due to their stable molecular structures. This study aimed to (i) optimize the synthesis of oil palm trunk-based activated carbon (OPTAC) for AMC removal, (ii) model the adsorption process using the mass transfer model (MTM) and (iii) evaluate OPTAC regeneration through ultrasonic washing. OPTAC was synthesized using potassium hydroxide activation followed by carbon dioxide treatment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Response surface methodology (RSM) identified optimal synthesis conditions at 343 W, 12.87 min and an impregnation ratio of 2.00 g g⁻¹. Under these conditions, the predicted AMC uptake was 146.44 mg g⁻¹ (actual: 154.15 mg g⁻¹; 5.00% error), and the predicted OPTAC yield was 42.78% (actual: 41.19%; 3.86% error). The AMC–OPTAC adsorption followed the Freundlich isotherm, with a Langmuir capacity (<i>Q</i>_m) of 238.67 mg g⁻¹. Kinetic analysis revealed that the pseudo-first-order model best described the system. MTM analysis yielded an average mass transfer constant (<i>k</i>_m) of 0.23 mg m L⁻¹ h⁻¹, rate constant (<i>k</i>_MTM) of 0.00051 h⁻¹ and estimated surface area (<i>a</i>_MTM) of 611.34 m² g⁻¹, closely matching the measured mesopore surface area (647.82 m² g⁻¹; 5.63% error). Thermodynamic analysis confirmed physisorption as the dominant mechanism, with spontaneous and endothermic behavior. In regeneration studies, ultrasonic washing outperformed microwave reactivation, maintaining AMC removal efficiency and OPTAC yield above 50% for five cycles, compared to three with microwave treatment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>RSM successfully optimized AMC removal and OPTAC yield, while the MTM effectively predicted the active surface area involved in the adsorption process. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1310-1327"},"PeriodicalIF":2.8,"publicationDate":"2025-04-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939111","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Analyzing energy consumption for the electrodialysis based on separation of gluconic acid (sodium gluconate) including optimization by applying dynamic electrical potential","authors":"Suwattana Pruksasri,&nbsp;Teeraporn Kongbangkerd,&nbsp;Senad Novalin","doi":"10.1002/jctb.7863","DOIUrl":"https://doi.org/10.1002/jctb.7863","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The energy consumption and optimization of separation processes are of great interest. Focusing on this, in the present paper, the separation of gluconic acid from a model solution using electrodialysis was investigated. The first question is which voltages (current density) should be applied. To have an orientation for the value of this parameter, one can find the maximum current efficiency (CE) and take the corresponding voltage. Because the CE decreases during the separation process when keeping either voltage or current density constant, the voltage can be adjusted so that the CE remains at maximum (dynamic voltage operation). Thus, the energy consumption can be reduced. However, the ion flux will decrease, which needs to be taken into account for economic reasons (increasing membrane area).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Adjusting the voltage to keep the CE at maximum or very close to maximum results in a reduction of energy consumption to ≈25% compared to constant voltage operation. The ion flux decreases to a factor of 3, which significantly increases the necessary membrane area. The results also show that when operating with higher voltages (e.g. constant voltage operation), the energy consumption can increase considerably due to decreasing CE and increasing entropy production.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>From an economic point of view, it may be justified to apply higher voltages while accepting considerably higher energy consumptions. However, industrial experience is necessary to determine if there are additional negative effects. Additionally, for example, life-cycle assessment is recommended to consider sustainability requirements. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1328-1334"},"PeriodicalIF":2.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939096","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Clickable aminoguanidine-modified ion-imprinted polymer for highly selective neodymium(III) recovery","authors":"Majed S. Aljohani","doi":"10.1002/jctb.7858","DOIUrl":"https://doi.org/10.1002/jctb.7858","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Neodymium (Nd³⁺) is a critical rare earth element, with widespread use in advanced technology, requiring effective recovery mechanisms due to increasing demand. A novel neodymium ion-imprinted polymer (Nd-IIP) was here synthesized from aminoguanidine-functionalized phenolic resin as the functional matrix. Polymerization entailed the Diels–Alder crosslinking mechanism, which created well-organized and selective recognition sites for Nd³⁺ ions. Stabilization following crosslinking ensured high specificity, mechanical stability, and reusability of the polymer.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The effective introduction of the functional groups was confirmed by Fourier transform infrared spectroscopy and solid-state ¹³C nuclear magnetic resonance, while X-ray photoelectron spectroscopy, scanning electron microscopy, and Brunauer–Emmett–Teller analysis provided information regarding the adsorption mechanism. Thermogravimetric analysis/differential thermal analysis was used for thermal stability confirmation of the polymer. Adsorption study illustrated maximum adsorption capacity of ~400 mg g⁻¹, which was found to be roughly twice that of non-imprinted polymer. Adsorption followed Langmuir isotherm model and pseudo-second-order kinetics, confirming monolayer, chemisorption-based adsorption. Thermodynamic analysis confirmed that the process was spontaneous and endothermic in nature. Selectivity analysis revealed that Nd-IIP was 30–40-fold more selective for Nd³⁺ than for interfering metal ions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Nd-IIP maintained 95% of its adsorption capacity after five cycles of regeneration, affirming its high reusability and durability. The results emphasize Nd-IIP as a highly selective and effective polymeric sorbent for the removal and recovery of Nd³⁺ from aqueous solutions, with great potential for the sustainable extraction of rare earth elements. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 6","pages":"1257-1272"},"PeriodicalIF":2.8,"publicationDate":"2025-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143939097","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}