Journal of chemical technology and biotechnology最新文献

{"title":"New quaternary composite LDH/bayerite/nitratine/carbon in the hybrid matrix bimetallic NiAl LDH/carbon for CO2 capture","authors":"Tharisa Shafa Nandasari,&nbsp;Muhaimin Muhaimin,&nbsp;Grasianto Grasianto,&nbsp;Muhammad Al Muttaqii,&nbsp;Akhtar Rasool,&nbsp;Muh. Nur Khoiru Wihadi","doi":"10.1002/jctb.70149","DOIUrl":"10.1002/jctb.70149","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Carbon dioxide (CO₂) is a leading greenhouse gas whose levels are perpetually rising. Therefore, the development of new innovative materials and economic CO₂ sequestration techniques is a crucial area of research. We fabricated the novel quaternary nanocomposite material comprising bimetallic NiAl LDH, bayerite, nitratine, and carbon <i>via</i> the hydrothermal method.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results revealed that the quaternary composite LDH/Bayerite/Nitratine/Carbon formed in the solid. The formation of bayerite on the LDH/carbon matrix due to excess Al³⁺ ions under hydrothermal and alkaline conditions. The nitratine species was <i>in situ</i> formed and trapped within the layered structure of LDH. The nitrogen (N₂) isotherm adsorption profile for all quaternary composites demonstrated consistency with mesoporous and lamellar features. The quaternary composite surface area ranged from 12.31 to 16.84 m²/g, pore diameters ranged from 30.96 to 43.55 nm, and pore volumes from 0.083 to 0.103 cm³ g⁻¹. All composites have a layered configuration of superimposed flakes. The average particle size of the composites ranges from 31.92 to 54.02 nm. The composites reveal CO₂ adsorption capacities ranging from 35.18 to 45.73 mmol/g, exceeding those of most other LDH composites.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>New quaternary composite demonstrates significant potential for CO₂ sequestration. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"961-970"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683771","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":"Homogeneous base-catalyzed isomerization of linoleic acid: Toward high selectivity of bioactive c9,t11 and t10,c12-CLA isomers","authors":"Shouteng Zheng,&nbsp;Pengpeng Huang,&nbsp;Mingming Fan,&nbsp;Pingbo Zhang","doi":"10.1002/jctb.70159","DOIUrl":"10.1002/jctb.70159","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Conjugated linoleic acid (CLA), particularly the bioactive isomers c9,t11-CLA, and t10,c12-CLA, has garnered substantial attention in food, nutraceutical, and pharmaceutical fields due to its diverse physiological benefits. However, the efficient synthesis of CLA with high selectivity toward bioactive isomers and satisfactory yield remains a challenge in homogeneous catalytic systems.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>We systematically investigated the effects of key reaction parameters – including temperature, time, catalyst dosage, and alcohol-to-oil ratio – on the conversion of linoleic acid (LA) and the selectivity of target CLA isomers in a homogeneous base-catalyzed isomerization process. The chemical composition and structural characteristics of the resulting CLA products were comprehensively characterized <i>via</i> Fourier transform infrared spectroscopy (FT-IR), ultraviolet–visible spectroscopy (UV-visible), gas chromatography (GC), and gas chromatography–mass spectrometry (GC–MS). Four CLA isomers were identified, namely c9,t11-CLA, t10,c12-CLA, t10,t12-CLA, and t9,t11-CLA, with the bioactive c9,t11-CLA and t10,c12-CLA as the predominant components. Through univariate optimization combined with parallel validation experiments, the optimal reaction conditions were determined as follows: stirring rate of 800 r/min, reaction temperature of 185 °C, reaction time of 4.5 h, catalyst (Sodium ethoxide) dosage of 30 wt%, and alcohol (Ethylene glycol) -to-oil ratio of 10 mL/g. Under these optimized conditions, the relative content of bioactive CLA isomers reached nearly 90% – a performance that outperforms many conventional homogeneous catalytic systems for LA isomerization.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study provides a systematic and scalable approach for the efficient synthesis of high-purity, bioactive-enriched CLA, offering valuable insights into the rational design of homogeneous catalytic processes for lipid modification and meeting the industrial demand for high-quality CLA products. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"1056-1066"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683620","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":"Effective carbon dioxide adsorption in graphene oxide–piperazine-modified Ni-MOF-74 frameworks","authors":"Syed Turab Haider Zaidi,&nbsp;Mohamad Azmi Bustam,&nbsp;Aqeel Ahmad,&nbsp;Muhammad Usman,&nbsp;Marhaina Ismail,&nbsp;David Asubonteng,&nbsp;Hafiz Abuzar Ahsan,&nbsp;Shahzad Maqsood Khan","doi":"10.1002/jctb.70151","DOIUrl":"10.1002/jctb.70151","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The rising atmospheric CO₂ concentration, driven primarily by industrial emissions, has heightened the need for advanced carbon capture materials. Metal–organic frameworks (MOFs), particularly Ni-MOF-74, offer high CO₂ adsorption potential but suffer from structural fragility and limited performance under ambient conditions. To address these limitations, a GO@Ni-MOF-74/PZ composite was synthesized via a solvothermal method, incorporating graphene oxide (GO) to improve structural stability and piperazine (PZ) as a nitrogen-rich functional agent to enhance CO₂ affinity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Comprehensive characterization using various techniques confirmed the successful integration of GO and PZ without compromising MOF crystallinity, while significantly increasing surface area and micropore volume. The CO₂ adsorption capacity improved from 4.5 mmol g⁻¹ for pristine Ni-MOF-74 to 5.2 mmol g⁻¹ for GO@Ni-MOF-74/PZ at 1 bar and 25 °C. Grand canonical Monte Carlo simulations showed good agreement with experimental adsorption trends and relative uptake behavior, providing molecular-level insights into the adsorption mechanism. Adsorption data were further analyzed using Langmuir, Freundlich and Sips isotherm models, enabling quantitative evaluation of site affinity, surface heterogeneity and maximum uptake capacity.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These results demonstrate that GO-functionalized Ni-MOF-74 combined with amine-based modification offers a promising pathway toward efficient and scalable CO₂ capture technologies. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"971-983"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683872","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":"Impact of conductive magnetite nanoparticles and anode polarization on glucose fermentation","authors":"Clara Marandola,&nbsp;Silvia Bolognesi,&nbsp;Matteo Tucci,&nbsp;Marco Resitano,&nbsp;Carolina Cruz Viggi,&nbsp;Sebastià Puig,&nbsp;Marianna Villano","doi":"10.1002/jctb.70154","DOIUrl":"10.1002/jctb.70154","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Electrically conductive materials and electrochemical stimulation strategies are increasingly explored to steer microbial fermentation towards desired metabolic outputs. These approaches also hold remarkable potential to couple wastewater treatment (WWT) to the production of value-added compounds, in turn enhancing environmental sustainability and bioresource recovery. In this study, the effect of either conductive magnetite nanoparticles (Fe₃O₄-NP_S) or anode electro-fermentation (at +0.20 V <i>vs.</i> Standard Hydrogen Electrode) or, even, a combination thereof was explored as a means to steer glucose fermentation by mixed microbial cultures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The combined application of anode polarization and magnetite nanoparticles resulted in an enhanced (up to nearly 25% on a molar basis) total production of carboxylic acids relative to unamended control tests. Remarkably, the addition of magnetite, irrespective of the presence of the polarized electrode, steered the metabolism towards an enhanced (up to 52% on a molar basis, relative to unamended control) accumulation of butyric acid (up to ~50 mmolC L⁻¹) from glucose degradation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This finding is relevant since butyric acid is a high-value platform chemical with applications in the production of biofuels, bioplastics, and pharmaceuticals, making its selective biosynthesis of considerable industrial interest. Anode polarization alone contributed less significantly to changes in the relative distribution of organic acids. Overall, this study demonstrates how integrating conductive nanoparticles and electrochemical stimulation can be leveraged to manipulate mixed-culture fermentations. © 2026 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":"101 5","pages":"1027-1034"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70154","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683722","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":"Controlled performance and atmospheric emissions testing of a biofuel engine produced by hydrodeoxygenation of chicken fat waste with a Ni/tire carbon catalyst","authors":"Luis A Sánchez-Olmos,&nbsp;Manuel Sánchez-Cárdenas,&nbsp;Fernando Trejo,&nbsp;Martín Montes Rivera,&nbsp;René H Lara,&nbsp;Benito Alexis Hernández Guerrero","doi":"10.1002/jctb.70164","DOIUrl":"10.1002/jctb.70164","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKROUND</h3>\u0000 \u0000 <p>Catalytic hydrodeoxygenation reactions of chicken fat allow renewable biofuel (CB) production with a high content of <i>n</i>-C₁₇ alkanes and diesel fuel-like properties. Nickel catalysts deposited on carbon, obtained by combining wet impregnation and pyrolysis of used tires, demonstrated high efficiency in producing biofuels from chicken fat. The Box–Behnken design of experiments was used to determine the optimal combination of parameters for maximizing the yield of <i>n</i>-C₁₇. Moreover, we evaluated performance and emissions in a four-stroke, direct-injection, CB40 vertical engine.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The Ni/C9 catalyst achieved a conversion rate of 95.2% and a selectivity of 83.2% for the production of <i>n</i>-C₁₇ alkanes. The optimal conditions for obtaining the maximum yield of <i>n</i>-C₁₇ are 25 bar pressure, 8.91% Ni by weight, 339.2 °C, and 4.89 h reaction time. When comparing the performance of conventional diesel fuel with blends of CB biofuel and diesel, the blends containing 20% and 40% renewable biofuel (CB20 and CB40) resulted in a power loss below 0.6%. However, with CB40, emissions of CO, HC, NOx, and smoke were reduced by 19.6%, 21.8%, <i>ca</i> 4%, and 42.09%, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>This study presents the synthesis, engine performance, and emissions test results of Ni/C catalysts using waste tire carbon and chicken fat waste. These catalysts yielded promising conversion and selectivity rates for the production of renewable biofuels. When blends of the biofuel with conventional diesel were used in a CB40 engine, significant reductions in pollutant emissions were observed, demonstrating its potential for industrial application. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"1103-1112"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683837","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":"Efficient removal of selenite ions from coal mine waste stream using a novel O-diaminopyridine-based chitin composite: adsorption, equilibrium, and environmental aspects sustainability","authors":"Mahmoud A. Abdelaziz,&nbsp;Rasha Jame,&nbsp;Humaira Parveen,&nbsp;Sayeed Mukhtar,&nbsp;Ibrahim Saleem Alatawi,&nbsp;Adel I. Alalawy,&nbsp;Alaa Muqbil Alsirhani,&nbsp;Danah M. Algarallah","doi":"10.1002/jctb.70152","DOIUrl":"10.1002/jctb.70152","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study evaluates a newly synthesized <i>O</i>-diaminopyridine-based chitin composite (CHI-DIPY) for the effective elimination of selenite (Se⁴⁺) ions from polluted water. The adsorbent was tested using wastewater collected from an open-pit coal mine containing an initial selenium concentration of about 3 mg/L. Successful synthesis and structural integrity of CHI-DIPY were confirmed using FT-IR, XPS, BET, SEM–EDX, TGA, ¹H-NMR, ¹³C-NMR, and MS analyses. Key operational parameters, including pH, contact time, initial selenium concentration, adsorbent dosage, co-ion interference, temperature, and elution conditions, were systematically optimized.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Under optimal conditions (25 °C, pH 4, 25 min contact time, and 250 mg/L initial Se concentration), CHI-DIPY achieved a maximum adsorption capacity of 110 mg/g. Equilibrium data were best described by the Langmuir isotherm model, with a theoretical capacity of 109.98 mg/g. Kinetic studies followed a pseudo-second-order model, predicting a capacity of 123.45 mg/g. Thermodynamic analysis indicated that adsorption was spontaneous and exothermic (Δ<i>H</i> = −18.305 kJ mol⁻¹; Δ<i>G</i> = −3.212 to −0.446 kJ mol⁻¹ over 298–353 K). CHI-DIPY exhibited strong selectivity for selenite in the presence of competing ions and demonstrated excellent reusability, with 99% selenium desorption using 1 M H₂SO₄.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>CHI-DIPY is a highly efficient, selective, and regenerable adsorbent for selenite removal. Application to real coal-mine wastewater reduced selenium concentrations below WHO and EPA limits in a single treatment cycle, highlighting its strong potential for practical environmental remediation. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"984-1010"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147684084","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":"Integrating fed-batch pulse feeding and flux balance analysis for PHB production by Cupriavidus necator from cassava-based dextrose","authors":"Martha L Ascencio-Galván,&nbsp;Víctor A López-Agudelo,&nbsp;Andreas Dräger,&nbsp;Julio C Caicedo,&nbsp;David Gómez-Ríos,&nbsp;Rodrigo Andler,&nbsp;Howard Ramírez-Malule","doi":"10.1002/jctb.70160","DOIUrl":"10.1002/jctb.70160","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The growing demand for biodegradable polymers has positioned polyhydroxybutyrate (PHB) as a sustainable alternative to petrochemical plastics. Microbial synthesis from renewable, low-cost substrates such as cassava starch-derived dextrose offers a promising route, but feeding strategies and metabolic understanding remain critical. This study aimed to evaluate the effect of fed-batch pulse feeding on PHB production by <i>Cupriavidus necator</i> DSM 428 and to integrate experimental results with flux balance analysis (FBA).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Three pulse-feeding strategies were assessed. Two pulses containing carbon and nitrogen at 24 and 48 h (C/N ratio 73) led to 33.55% (w/w) PHB accumulation. A single dextrose-only pulse at 48 h led to 25.12% (w/w), while delaying this pulse to 60 h increased PHB accumulation to 50.40% (w/w). Feeding at the onset of stationary phase enhanced biomass growth but reduced PHB storage, whereas late feeding favored polymer accumulation, likely due to nitrogen limitation. PHB was characterized by X-ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, energy-dispersive X-ray spectroscopy, thermogravimetric analysis, and differential scanning calorimetry, confirming its expected structural and thermal properties. FBA with <i>i</i>CNH2025A showed strong correlation with experimental data, accurately predicting growth and carbon flux redirection toward PHB synthesis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The integration of fed-batch pulse feeding with FBA provides new insights into the metabolic and process factors driving PHB accumulation from cassava-based substrates. The results highlight the importance of feeding timing for optimizing yields and demonstrate the value of metabolic modeling in guiding sustainable bioprocess design. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"1011-1026"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683737","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":"Potential of solid-state microwaves in lab-scale chemical-process development","authors":"Christian Cravotto,&nbsp;Clelia Aimone,&nbsp;Giorgio Capaldi,&nbsp;Giorgio Grillo,&nbsp;Giancarlo Cravotto","doi":"10.1002/jctb.70162","DOIUrl":"10.1002/jctb.70162","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The integration of a solid-state microwave (MW) generator into a newly designed, versatile MW reactor ensures improved energy efficiency, precise process control and broader application potential. In its most particular feature, the device supports the modification of dielectric-radiation orientation and can be operated under various configurations, granting optimal performance across a range of conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Multiple set-ups have been investigated in order to study the versatility of the system. Cannabis-inflorescence and tea waste extraction have been investigated and compared with conventional batch methods, while synthetic procedures have been assessed in both batch and flow (loop and flow-through) modes. The goal of this preliminary investigation was to test a few parameters, such as flow rate, temperature and catalyst loading, aiming to ensure high yields and minimize energy consumption. The efficiency of flow-through-mode extraction has been evaluated for tea waste extraction, with excellent results. Additionally, three reactions have been successfully carried out: an esterification, a ketalization and a reactive-distillation-assisted one-pot ring-opening/esterification. All reactions provided promising outcomes, highlighting the versatility and effectiveness of the developed MW system.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These preliminary results confirm the potential of the solid-state MW-assisted system as a powerful and versatile platform for efficient extraction and chemical transformations on a small scale. Future work will further optimize parameters and design the scale-up. © 2026 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":"101 5","pages":"1077-1093"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70162","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683721","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":"Dewatering combined with Moringa oleifera extract coagulation for industrial-grade cassava starch concentration","authors":"Maria Eduarda S Speretta,&nbsp;Amarilis S Souza,&nbsp;Ana Carolina R Stoppe,&nbsp;Marcelo S Bacelos,&nbsp;Kássia G Santos","doi":"10.1002/jctb.70165","DOIUrl":"10.1002/jctb.70165","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Efficient dewatering is a critical step in cassava starch production because the moisture content of the concentrated slurry directly affects downstream drying costs and overall process efficiency. Conventional concentration routes, including sedimentation and centrifugation, often provide limited cake dryness and can increase energy demand in industrial operation. In this study, <i>Moringa oleifera</i> Lam. seed extract was investigated as a biodegradable conditioning agent prior to pressure filtration of cassava starch suspensions in a laboratory-scale plate-and-frame filter press. A 3² full factorial design was used to assess the effects of solids concentration (100–200 g L⁻¹) and extract dosage (0–20 mL L⁻¹) on process performance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Solids concentration was the main factor controlling filtration time and filtrate volume, confirming that cake growth and hydraulic resistance govern dewatering under constant-pressure operation. <i>Moringa</i> dosage mainly affected cake structure, as reflected by changes in specific cake resistance. The best operating condition was obtained at 150 g L⁻¹ and 10 mL L⁻¹, which produced the shortest filtration cycle, high cake permeability, and solids recovery above 99.8%. Under the most concentrated and highly conditioned condition (200 g L⁻¹; 20 mL L⁻¹), incomplete chamber filling indicated reduced slurry flowability and less favorable dewatering behavior.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p><i>Moringa oleifera</i> conditioning enhanced cassava starch dewatering by improving cake permeability and reducing hydraulic resistance, acting functionally as a filtration aid. This approach offers a practical and more sustainable alternative for process intensification in cassava starch manufacturing. © 2026 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":"101 5","pages":"1094-1102"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70165","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683858","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":"Investigation of olive stone-derived hydrochar produced via hydrothermal carbonization for methylene blue removal","authors":"Emel Engintepe,&nbsp;Ayşe Nur Zambak,&nbsp;Ayşe Nilgün Akın","doi":"10.1002/jctb.70161","DOIUrl":"10.1002/jctb.70161","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Hydrochar produced from olive (<i>Olea europaea</i>) stones via hydrothermal carbonization at 200 °C for 4 h was investigated as a sustainable adsorbent for methylene blue (MB) removal from aqueous solutions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The hydrochar exhibited an amorphous carbon structure with abundant oxygen-containing functional groups, a low Brunauer–Emmett–Teller surface area (1.143 m² g⁻¹) and a zeta potential of −19.4 mV, confirming the predominance of negatively charged sites. Batch adsorption experiments were conducted at the natural pH of dye solution to examine the effects of contact time, initial concentration and temperature on MB adsorption. The maximum adsorption capacity estimated by the Langmuir model was 46.3 mg g⁻¹. The equilibrium data fitted best to the Temkin model (<i>R</i>² = 0.987), indicating physisorption controlled by surface functional groups, while kinetic analysis showed that the process followed the pseudo-second-order model (<i>R</i>² = 0.99), implying surface-controlled interactions. Thermodynamic parameters (Δ<i>G</i>° = −0.17 to −3.27 kJ mol⁻¹; Δ<i>H</i>° = +72.23 kJ mol⁻¹; Δ<i>S</i>° = +245.76 J mol⁻¹ K⁻¹) revealed that the adsorption was spontaneous, endothermic and entropy-driven.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>Olive stone-derived hydrochar is a promising, low-cost and sustainable adsorbent for the removal of MB from dye-containing wastewater. Adsorption proceeded mainly via surface interactions and was dominated by physisorption, as supported by kinetic, isotherm and thermodynamic analyses. The adsorption capacity increased with temperature within the investigated range, indicating an endothermic and spontaneous process. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 5","pages":"1067-1076"},"PeriodicalIF":2.4,"publicationDate":"2026-04-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147683552","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}