Journal of chemical technology and biotechnology最新文献

{"title":"The effect of calcium and magnesium on the aggregation of a purple phototrophic bacteria mixed consortium","authors":"Jairo M Carrillo-Osorio,&nbsp;Germán Buitrón","doi":"10.1002/jctb.70242","DOIUrl":"https://doi.org/10.1002/jctb.70242","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>An essential aspect of applying Purple Phototrophic Bacteria (PPB) technology for wastewater treatment is the biomass separation from the aqueous phase. Ca²⁺ and Mg²⁺ have been used to enhance the aggregation of different biological matrices. In this paper, the effect of Ca²⁺ and Mg²⁺ on the aggregation of a mixed culture of PPB was evaluated. Key physical and chemical parameters, including extracellular polymeric substance segregation and characterization, zeta potential, and particle size, were evaluated to elucidate the mechanism of PPB aggregation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Using Ca²⁺ alone and a combination of Ca and Mg enhances the separation of the biomass. The presence of Ca²⁺ effectively increases the hydrophobicity and particle size of PPB. The combination of Ca²⁺ and Mg²⁺ improves the hydrophobicity of cells up to 75%. The SVI and settling velocity of the obtained PPB aggregates were 26 ± 4 mL g⁻¹ and 3.5 ± 0.2 m h⁻¹, respectively. Evidence suggests that Ca²⁺ interaction with polysaccharides enables agglomeration and reduced exposure of hydrophilic structural rearrangement, making it the main aggregation mechanism rather than double-layer compression.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>Our results demonstrate that a combination of Ca<span></span>Mg enhances the aggregation ability of the mixed culture of PPB due to a high hydrophobicity and potential EPS binding phenomena. Our strategy allows the formation of floccular PPB aggregates with good settling properties. © 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 11","pages":"2301-2309"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70242","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146501","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":"Enhancement of magnetic biochar on nitrogen removal performance of Anammox granular sludge under acute polystyrene nanoplastics stress","authors":"Jingran Fu,&nbsp;Sishi Liu,&nbsp;Zelong Wang,&nbsp;Shefeng Li,&nbsp;Siyu Ding,&nbsp;Yong Zhang,&nbsp;Xuli Li,&nbsp;Xiaodan Liu,&nbsp;Jing Zhang,&nbsp;Hongyu Wang","doi":"10.1002/jctb.70239","DOIUrl":"https://doi.org/10.1002/jctb.70239","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Nanoplastics pose a significant threat to the efficiency and stability of anaerobic ammonium oxidation (Anammox). This study investigated the nitrogen removal efficiency, extracellular polymeric substance (EPS) secretion, microbial community, and enhancement mechanisms of Anammox with magnetic biochar (MBC) under sudden exposure to high-concentration polystyrene nanoplastics (PS-NPs).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Results demonstrated that sudden exposure to PS-NPs at 300 mg L⁻¹ distinctly reduced the nitrogen removal efficiency of Anammox, while the addition of MBC could significantly alleviate the inhibition. Fourier transform infrared analysis manifested that MBC could adsorb the PS-NPs by electrostatic attraction, surface complexation and <i>π</i>–<i>π</i> interactions. MBC could stimulate anaerobic ammonium-oxidizing bacteria to secrete a large amount of EPS (including protein, humic acids, and cytochrome c). Microbial community analysis showed that the addition of MBC could maintain the stability of microbial community structure. KEGG pathway analysis indicated that addition of MBC significantly enhanced the nitrogen metabolism pathway and glycan biosynthesis and metabolism pathway of Anammox granular sludge (AnGS) under acute PS-NPs stress, thereby improving its nitrogen removal efficiency and structural stability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study provided valuable insights into the response characteristics and enhancement mechanism of MBC for AnGS exposed to PS-NPs, which may be helpful for the application of Anammox in actual wastewater treatment. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2339-2352"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146233","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":"Physical stability of RNA–lipid nanoparticles under agitation, freeze–thaw and accelerated stability testing","authors":"Franz W Laurett Veras,&nbsp;Leah Wright,&nbsp;Robert J Falconer","doi":"10.1002/jctb.70235","DOIUrl":"https://doi.org/10.1002/jctb.70235","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The choice of excipient is important in enhancing stability of liquid formulations containing lipid nanoparticles (LNPs) used in RNA delivery where the ability to survive unplanned excursions to higher and lower temperature and vibration is an important attribute. In this study, established parenteral excipients were tested for their capacity to protect LNP structures in solution.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>LNPs are very susceptible to damage during freeze–thaw cycles. The most promising excipients to reduce ice crystal damage were sucrose and glycerol. Poloxamer 188 (PX188), polysorbate 80 (PS80), bovine serum albumin (BSA) and trehalose did not perform as well as sucrose and glycerol. Accelerated stability testing (35 °C) observed an increase in hydrodynamic diameter of LNPs. BSA and PS80 were deleterious to LNP stability at 35 °C with a large rise in the polydispersity index. Trehalose, sucrose and glycerol performed better at 35 °C than the other treatment groups. Mild agitation had little effect on LNP structures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The excipients of choice for liquid formulation based on freeze–thaw and accelerated testing are sucrose and glycerol. Sucrose is known to be effective in formulations of liposomes and LNPs. Glycerol, however, is rarely used for liposomes and LNP liquid formulations. PS80 and BSA were deleterious to LNP stability during freeze–thaw and accelerated testing. PX188 conferred some protection during freezing, and since its structure and mode of action are radically different from those of sucrose and glycerol it could prove to be synergistic. © 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 11","pages":"2293-2300"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70235","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146500","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":"Removal of pharmaceuticals from municipal wastewater using a powdered activated carbon-supplemented moving bed membrane bioreactor","authors":"Athanasia Iliopoulou,&nbsp;Petros Mastoras,&nbsp;Georgia Gatidou,&nbsp;Kallisti Skarveli,&nbsp;Konstantina Adamaki,&nbsp;Olga S Arvaniti,&nbsp;Maria Aloupi,&nbsp;Michail S Fountoulakis,&nbsp;Athanasios S Stasinakis","doi":"10.1002/jctb.70249","DOIUrl":"https://doi.org/10.1002/jctb.70249","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The new European Union Wastewater Directive 2024/3019 requires upgrading sewage treatment plants to achieve 80% removal of micropollutants. This study aimed to compare different Powdered Activated Carbon dosing strategies within a hybrid Moving Bed-Membrane Bioreactor (PAC-MB-MBR) system, to evaluate its performance and to study the removal of five pharmaceuticals during wastewater treatment.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Initial batch experiments in tap water demonstrated that carbamazepine (CBZ), valsartan (VAL), and diclofenac (DCF) achieved 90% removal for all tested PAC doses, while experiments with different wastewater matrices showed that adsorption efficiency decreased in the presence of dissolved organic matter. Continuous-flow experiments in the absence of PAC (Phase A), with a single dose of PAC at 1 g L⁻¹ (Phase B), and a daily dose of PAC at 0.03 g L⁻¹ (Phase C) demonstrated stable COD (&gt;93%) and NH₄⁺-N (&gt;98%) removal. In the absence of PAC, CBZ and DCF were removed by 16% and 35%, respectively, while after PAC addition, the average removal of all pharmaceuticals exceeded 80%. Experiments with crossflow membrane filtration units showed that combining nanofiltration with PAC-MB-MBR achieved total removal exceeding 98% for all target pharmaceuticals.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>COD and NH₄⁺-N were effectively removed at all experimental conditions. The addition of PAC reduced extracellular polymeric substances (EPS) and soluble microbial products (SMP) concentrations and enhanced the removal of CBZ and DCF, while achieving sufficient removal efficiencies for all target pharmaceuticals. The daily addition of PAC appeared superior to a single dose. Nanofiltration experiments showed significant removal of four out of five target pharmaceuticals. © 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 11","pages":"2420-2430"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70249","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146589","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":"Coupling of gamma irradiation and membrane separation for escitalopram oxalate removal: optimization via experimental design and analysis of degradation pathways","authors":"Sabrine Ghazouani,&nbsp;Faten Boujelbane,&nbsp;Dorra Jellouli Ennigrou,&nbsp;Pengrui Jin,&nbsp;Bart Van der Bruggen,&nbsp;Nadia Mzoughi","doi":"10.1002/jctb.70245","DOIUrl":"https://doi.org/10.1002/jctb.70245","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Pharmaceutical compounds, recognized as emerging contaminants, pose an increasing concern due to their potential impact on aquatic ecosystems. Conventional water treatment methods often prove inadequate for the complete removal of these harmful substances.</p>\u0000 \u0000 <p>Our study explores an innovative hybrid approach combining gamma irradiation and nanofiltration (NF) to remove the emerging contaminant escitalopram oxalate (ESCO) from aqueous solutions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULT</h3>\u0000 \u0000 <p>Gamma irradiation alone demonstrated high efficacy in degrading the compound, following pseudo-first-order kinetics. Specifically, ESCO achieved nearly complete removal of 99.5% at an absorbed dose of 2 kGy. However, mineralization, measured by total organic carbon (TOC) reduction, was partial, with a removal rate of 22.65%, indicating that the process is highly effective for contaminant degradation but less so for full mineralization.</p>\u0000 \u0000 <p>Nanofiltration further enhanced pollutant removal by retaining 89.4% of ESCO under optimal conditions (8 bar). The combined gamma irradiation and nanofiltration process yielded additive sequential benefit, significantly improving TOC reduction and overall removal efficiency, as validated through the Box–Behnken experimental design. Using LC–MS, we identified six degradation by-products of ESCO, revealing hydroxylation as a crucial mechanism in its breakdown.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This integrated approach gamma irradiation/nanofiltration offers promising efficiency for removing persistent organic pollutants from water, deepening our understanding of the degradation pathways and enhancing the pollutant removal framework. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2228-2239"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146648","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":"Optimal PVC reactor temperature and viscosity control for automated manufacturing cells based on machine learning and internet of things","authors":"Sakthivel Malathi,&nbsp;Parthiban Shivani,&nbsp; Sarvesh,&nbsp;Govindasamy Venkatesan","doi":"10.1002/jctb.70238","DOIUrl":"https://doi.org/10.1002/jctb.70238","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study develops an intelligent control framework for optimizing temperature and viscosity during PVC polymerization by integrating machine learning (ML), the Internet of Things (IoT), a Large Separable Quantum Portfolio Convolutional Neural Network (LQCN), and model predictive control (MPC). The proposed approach utilizes real-time IoT sensor data from PVC reactors to achieve predictive optimization of reactor operating conditions, enhancing process efficiency and product quality.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The proposed MPC-LQCN framework demonstrated superior performance compared with existing neural network-based MPC approaches, achieving faster response times ranging from 0 to 1.6 s. Cross-validation results showed excellent predictive accuracy, with Mean Squared Error (MSE) values reduced to 0.008 for temperature and 0.0009 for viscosity at Fold 10. Comparative analysis further confirmed that the MPC-LQCN model outperformed LSTM, PINN, and ANN models in terms of MSE, MAE, MAPE, and RMSE.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The integration of ML, IoT, quantum-inspired optimization, and MPC significantly improved reactor stability, energy efficiency, and product quality in PVC production. The proposed MPC-LQCN framework provides a scalable and effective solution for intelligent industrial process control and automated manufacturing applications. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2240-2254"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146087","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":"Thermal radiation and mass transfer analysis in oscillatory Magnetohydrodynamic Couette flow of a dusty fluid: applications in biomedical systems","authors":"Gohar Ali,&nbsp;Dolat Khan,&nbsp;Zeeshan Ali,&nbsp;Nwrh M Albqmi,&nbsp;Rashid Jan","doi":"10.1002/jctb.70253","DOIUrl":"https://doi.org/10.1002/jctb.70253","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The present study aims to explore the oscillatory magnetohydrodynamic Couette flow of a two-phase dusty fluid between two parallel plates, accounting for temperature variation on the walls, thermal radiation, and momentum, heat, and mass transfer between phases.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The governing equations for fluid and dust phases were derived and solved using the Poincaré-Lighthill perturbation technique. The results reveal significant effects of thermal radiation on heat transfer, as the Nusselt number increases from 0.09397 to 2.55094 by increasing the radiation parameter from 5 to 10, whereas an increase in Prandtl number decreases heat transfer by decreasing thermal diffusivity. The results also reveal an increase in skin friction due to an increase in buoyancy parameters, from 0.15287 to 0.21439 by increasing the thermal Grashof number, whereas stronger magnetic field effects reduced skin friction from 0.15287 to 0.03604 due to the damping effect of the Lorentz force.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The velocity and temperature fields were enhanced by radiation, whereas magnetic field strength and dust-fluid interaction reduced flow intensity through drag and electromagnetic resistance. The interphase heat and mass transfer significantly affected the thermal and concentration boundary layers of both phases. These findings demonstrate the coupled influence of radiative, magnetic, and interphase transport mechanisms in oscillatory dusty fluid flow and highlight the relevance of the model to chemically reactive transport, particulate processing, biomedical systems, and thermal management applications. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2377-2393"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146074","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":"Evaluation of the co-fermentation potential of different types of food waste combined with low organic matter waste activated sludge","authors":"Baodan Jin,&nbsp;Jiacheng Wang,&nbsp;Yusheng Jia,&nbsp;Baogui Wang,&nbsp;Jingjing Du,&nbsp;Lan Wang,&nbsp;Long Pang,&nbsp;Jiantao Ji,&nbsp;Chuang Ma,&nbsp;Xia Cao","doi":"10.1002/jctb.70240","DOIUrl":"https://doi.org/10.1002/jctb.70240","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>To address the disposal challenges of low-organic-matter waste activated sludge (WAS) and food waste (FW) while enhancing resource recovery, this study systematically investigated the co-fermentation of WAS with distinct types of FW.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Result</h3>\u0000 \u0000 <p>Results demonstrated that co-fermentation significantly outperformed mono-fermentation in both hydrolysis and acidification. Specifically, the protein-rich system (with tofu residue) achieved optimal hydrolysis (protein: 832.24 mg COD/L; polysaccharides: 123.68 mg COD/L), whereas the carbohydrate-rich system (with rice) yielded the highest short-chain fatty acids (SCFAs) production (3842.95 mg COD/L). Mechanistically, substrate composition dictated microbial community succession and metabolic pathways. In the carbohydrate-rich system, the boosted α-glucosidase activity and selective enrichment of carbohydrate-fermenting bacteria (<i>Erysipelothrix</i>) facilitated robust substrate-level phosphorylation and acetate production, driving superior acidification. Conversely, the protein-rich system stimulated protease activity and enriched protein-degrading anaerobes (<i>Proteiniclasticum</i> and <i>Tissierella</i>), which enhanced the hydrolysis of macromolecular proteins but directed the metabolic flux towards amino acid degradation rather than high-yield SCFAs biosynthesis.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>In summary, the carbohydrate-rich co-fermentation system demonstrated the greatest potential for SCFAs bioconversion and resource utilization. These findings provide a customizable paradigm for directing microbial metabolism through FW sorting, thereby advancing the circular bioeconomy <i>via</i> waste biorefinery. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2327-2338"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146636","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":"Catalytic performance of Ag/Ni nanoparticle-loaded starch/alginate hybrid microgel for degradation of organic dyes","authors":"Sonia Azeem,&nbsp;Ghulam Raza,&nbsp;Umar Farooq,&nbsp;Saba Jamil,&nbsp;Shanza Rauf Khan,&nbsp;Muhammad Jamshed Latif,&nbsp;Kiran Fatima,&nbsp;Waqar Sohail,&nbsp;Antartia Ahmad,&nbsp;Tahseen Kamal","doi":"10.1002/jctb.70224","DOIUrl":"https://doi.org/10.1002/jctb.70224","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>A Biodegradable microgel containing starch and sodium alginate was prepared by the free radical precipitation polymerization method, and nanoparticles of silver and nickel were incorporated by the <i>in-situ</i> reduction method.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Ag-O stretching, the main component of the bimetallic p (NIPAM-AAc-Str-SA), is indicated by the bands at 865 cm⁻¹ in FTIR spectroscopic analysis. A porous structure with cavities that enhance water absorption and bimetallic nanoparticle entrapment was revealed in the hybrid microgel by SEM, with pore size regulated by SA. A high-intensity peak observed at 0.9 KeV and another smaller peak at 2.9 KeV were identified by EDX analysis and the presence of nickel (Ni) and silver (Ag), respectively, in the prepared sample of bimetallic p(NIPAM-AAc-Str-SA) hybrid microgel was indicated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>According to DLS, hybrid microgels had an average size of 80.83 nm and a polydispersity index of 0.653. A lower PDI value suggests that the nanoparticles were evenly distributed throughout the microgel. Reduction of organic dyes is performed by using a hybrid microgel. Different kinetic parameters, including the apparent rate constant (<i>K</i>_app), reduction time, % reduction, and half-life, were compared for all substrates, and their catalytic activity was checked. Rhodamine B was the best reduced using hybrid microgel as compared to other dyes, about 98% reduction, having an apparent rate constant of 0.1349 min⁻¹, reduction time of 20 min and half-life of 5 min. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 10","pages":"2062-2071"},"PeriodicalIF":2.7,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904400","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":"Integration of ultrasonication with liquid triphasic flotation system for the extraction of phycocyanin and protein from Spirulina platensis","authors":"Kiishhen Kobbin,&nbsp;Kamil Kayode Katibi,&nbsp;Norafiqah Norazhar,&nbsp;Mohd Zuhair Mohd Nor,&nbsp;Pau Loke Show,&nbsp;Mohd Salahuddin Mohd Basri,&nbsp;Mohd Noriznan Mokhtar","doi":"10.1002/jctb.70090","DOIUrl":"https://doi.org/10.1002/jctb.70090","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Growing demand for natural pigments and vegan proteins has intensified interest in <i>Spirulina platensis</i>. However, the conventional extraction method caused phycocyanin degradation in <i>Spirulina platensis,</i> often resulting in low yields of the recovered compounds.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>A hybrid process that couples ultrasonication with a liquid triphasic flotation system (LTFS) was developed and optimised by one-variable-at-a-time (OVAT) experimentation. Optimum conditions, 90% (v/v) <i>t</i>-butanol, 200 g L⁻¹ ammonium sulphate, 10% (w/v) phosphate buffer, 4% (w/v) biomass loading, 20 min process duration at 40 °C, raised protein separation efficiency to 77.3% ± 1.1%, protein recovery to 79.2% ± 0.9%, and phycocyanin recovery to 90.3% ± 1.2%. SEM images confirmed cell-wall disruption after sonication, FTIR spectra revealed intact amide bands, and SDS-PAGE showed a predominant 17 kDa phycocyanin sub-unit with minimal fragmentation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Integrating ultrasonication with LTFS provides a rapid, energy-lean, and scalable route for simultaneously isolating high-purity phycocyanin and protein from <i>S. platensis</i>, overcoming the time, energy, and yield penalties of conventional methods. The platform is readily adaptable to other cyanobacterial feedstocks and supports the development of cost-effective natural-colourant and protein ingredients for food, cosmetic, and nutraceutical markets. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 10","pages":"1968-1979"},"PeriodicalIF":2.7,"publicationDate":"2026-09-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148904226","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}