Journal of chemical technology and biotechnology最新文献

{"title":"Correction to “Robust hydrophobic ceramic hollow-fibre membranes grafted by fluoroalkylsilane for water desalination via direct contact membrane distillation”","authors":"","doi":"10.1002/jctb.7908","DOIUrl":"10.1002/jctb.7908","url":null,"abstract":"<p>Omar, Othman, Tai, Puteh, Kusworo, Wong <i>et al</i>., Robust hydrophobic ceramic hollow-fibre membranes grafted by fluoroalkylsilane for water desalination via direct contact membrane distillation. <i>J Chem Technol Biotechnol</i> <b>100</b>:1077–1095 (2025). https://doi.org/10.1002/jctb.7843</p><p>There are missing first names of all authors in the previous published work due to an unexpected technical error. The corrected version is as follows:</p><p>Najib Meftah Almukhtar Omar^a,b, Mohd Hafiz Dzarfan Othman^a*, Zhong Sheng Tai^a, Mohd Hafiz Puteh^a, Tutuk Djoko Kusworo^c, Keng Yinn Wong^d, Tonni Agustiono Kurniawan^e, Nur Awanis Hashim^f</p><p>We apologize for this error.</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":""},"PeriodicalIF":2.4,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7908","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144646911","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":"Photocatalytic degradation of metronidazole using a new, green, and recyclable free-metal nano catalyst","authors":"Azam Karimian,&nbsp;Mahdieh Namvar-Mahboub,&nbsp;Fahimeh Abbaszadeh","doi":"10.1002/jctb.7910","DOIUrl":"10.1002/jctb.7910","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Metronidazole (MNZ) with antibacterial and anti-inflammatory functions is commonly prescribed as an antibiotic to treat infectious diseases in both humans and animals. Its excessive consumption depicted adverse effects on environment and human health. Heterogeneous photocatalysis, was introduced as a promising technology for MNZ removal.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>This study focused on the development of metal-free photocatalyst for application in MNZ removal. Luffa sponge was used as a biomaterial to prepare sulfonated activated carbon. The MNZ removal efficiency was increased in the order of photolysis &lt; adsorption &lt; photocatalytic degradation processes. The effect of sulfonation and catalyst dosage on the degradation performance of the as-prepared catalyst was also studied. The superior removal efficiency of 99% during 5 min irradiation was achieved in presence of 3 g/L catalyst. The curve fitting confirmed a pseudo-first-order kinetic model with rate constants equal to 0.637 min⁻¹. The effect of solution pH (3 to 11) was also investigated. The intermediate products were identified via liquid chromatography mass spectrometry and possible degradation pathways were proposed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The photocatalyst exhibited optimal performance for MNZ removal at acidic and basic conditions compared to neutral pH. The obtained results proved that heterogeneous photocatalysis with LAC-SO₃H is a sustainable method which has the ability to remove hazardous organic compounds from wastewater. The reusability results established the stability and high performance of LAC-SO₃H during 5 cycles. Althoughthe as-prepared catalyst act as a heterogeneous catalyst, future work is recommended to focus on its incorporation into adsorptive membranes to mitigate probable environmental risks. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 9","pages":"1781-1791"},"PeriodicalIF":2.4,"publicationDate":"2025-06-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888299","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":"Optimization and modeling of production and partial characterization of protease from Bacillus licheniformis NRS 1264","authors":"Ozge Sayin,&nbsp;Hasan Bugra Coban","doi":"10.1002/jctb.7907","DOIUrl":"10.1002/jctb.7907","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>With the developments in enzyme technology and their wide range of use, proteases have become one of the important industrial enzyme groups in the market. Therefore, there is a continuing need to explore new protease producers to meet various demands in industry. This study aimed to optimize and model protease production by <i>Bacillus licheniformis</i> NRS 1264, as well as to partially characterize the enzyme.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Characterization studies showed optimum temperature and pH values of the enzyme as 55 °C and 5.5, respectively. It was also found that the presence of 5 mmol L⁻¹ of MnSO₄ increased protease activity by 37%, whereas the same amount of CoCl₂ and EDTA decreased the activity by 20% and 37%, respectively. Additionally, the enzyme retained 95% of its maximum activity even after 30 days of storage at 4 °C. Furthermore, results of optimization studies indicated the optimum glucose, peptone and casein concentrations in the production medium as 1.25, 7.20 and 10.98 g L⁻¹, respectively. Under these conditions, maximum enzyme activity was measured as 5078 U mL⁻¹, which was approximately fourfold higher compared to the lowest enzyme activity value obtained in a one-factor-at-a-time experiment. Finally, modeling studies indicated that the modified Gompertz model represented protease production more successfully compared to the modified logistic model by having less error and <i>R</i>², bias factor and accuracy factor values closer to 1.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This is a unique study bringing a broadening of knowledge to the potential industrial level production of this highly potent protease enzyme. © 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 8","pages":"1737-1745"},"PeriodicalIF":2.4,"publicationDate":"2025-05-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7907","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647798","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":"Stimulating effect of copper ions and copper nanoparticles on a nitrifying sludge process: microrespirometric and physicochemical assessment","authors":"Gabriel R. Hernandez-Martinez,&nbsp;Emma O. Fuentes-Ramírez,&nbsp;Cherif Ben Youssef,&nbsp;Juan E. Ruiz Espinoza,&nbsp;Alejandro Zepeda","doi":"10.1002/jctb.7904","DOIUrl":"10.1002/jctb.7904","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Copper nanoparticles are used at an accelerated rate in several sectors, generating concern about their impact on human health and the environment. In this study, we characterized the physicochemical behavior and physiological effects of copper ions (Cu(II) ions) and copper nanoparticles (CuNPs) on a nitrifying sludge consortium.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Both Cu(II) ions and CuNPs exerted a hormetic effect, stimulating nitrifying sludge biomass. Stimulation was quantified by the percentage of enhancement (<i>E</i>_<i>OUR</i>), maximum specific oxygen uptake rate (<i>OUR</i>_<i>max</i>), and substrate affinity constant (<i>K</i>_<i>S</i>). The results showed that, within the range of 0–20 mg L⁻¹, both Cu(II) ions and CuNPs stimulated the nitrifying respiratory process, with maximum stimulation effects of 82.8% and 61.1% at 5 mg L⁻¹, respectively. Both Cu(II) ions and CuNPs only increased the <i>OUR</i>_<i>max</i>, but not the <i>K</i>_<i>S</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These findings indicate that copper deficiency could limit nitrogen removal in wastewater treatment. Furthermore, physicochemical characterization allowed us to determine that the observed stimulating effect may be caused by different factors, such as the aggregation, speciation, and adsorption of copper species in the nitrifying sludge consortium. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":"1716-1723"},"PeriodicalIF":2.4,"publicationDate":"2025-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647806","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":"Enhancing ultrasound-assisted oxidative desulfurization of fuels using hierarchical metal–organic framework and ordered mesoporous silica composite","authors":"Heba M. Salem,&nbsp;Aya M. Matloob,&nbsp;Raed M. Hegazey,&nbsp;Asmaa I. Zahran","doi":"10.1002/jctb.7897","DOIUrl":"10.1002/jctb.7897","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The demand for ultra-clean fuels with sulfur content below 15 ppm has intensified due to increasingly stringent environmental regulations. Traditional hydrodesulfurization methods face limitations in removing refractory sulfur compounds, necessitating the development of efficient alternative approaches. Ultrasound-assisted oxidative desulfurization (UAODS) has emerged as a promising method owing to its mild conditions and high efficiency. In this context, bismuth-based metal–organic frameworks (Bi-MOFs), recognized for their redox properties and structural tunability, were integrated with ordered mesoporous silica (MS) to form a novel hybrid catalyst (Bi-MOF/MS).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>This study presents the synthesis and application of a hierarchical Bi-MOF/MS catalyst for UAODS. The catalyst was comprehensively characterized using X-ray diffraction (wide and small-angle), X-ray photoelectron spectroscopy, Brunauer–Emmett–Teller analysis, Fourier transform infrared spectroscopy, and transmission electron microscopy, confirming its high crystallinity, ordered porous structure, and strong Bi-MOF/MS interaction. The effect of operational parameters, including ultrasound power, catalyst dosage, oxidant concentration, reaction temperature, reaction time, and extraction solvents, was systematically evaluated. Under optimized conditions, the Bi-MOF/MS catalyst achieved a sulfur removal efficiency of 97.2%. Kinetic studies and recycling experiments revealed stable performance, with 86.8% desulfurization efficiency retained after five cycles.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The integration of ordered MS with hierarchical Bi-MOF enhanced the structural stability, surface area, and synergistic interaction of the composite, leading to excellent catalytic activity and reusability. These findings establish the Bi-MOF/MS hybrid catalyst as a promising candidate for efficient and sustainable production of ultra-low-sulfur fuels. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":"1667-1678"},"PeriodicalIF":2.4,"publicationDate":"2025-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647816","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":"Experimental and density functional theory study on the efficient degradation of methyl orange dye by Ag2O/TiO2 composite photocatalyst driven by low-power irradiation","authors":"Mingliang Zhang,&nbsp;Yonghong Wu,&nbsp;Xiaowen Shao,&nbsp;Xin Jin,&nbsp;Jiahe Zhang,&nbsp;Bing Zhang","doi":"10.1002/jctb.7898","DOIUrl":"10.1002/jctb.7898","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The invention of a highly efficient photocatalyst is of profound significance for degradation of organic species in wastewater. Here, Ag₂O/TiO₂ composite photocatalyst was synthesized by metal deposition method. The structure and property of the as-prepared photocatalyst was characterized by scanning electron microscopy, X-ray photoelectron spectroscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, Mott–Schottky measurements and ultraviolet–visible spectrophotometry.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The effects of the constituent proportion of photocatalyst, pH value of solution, initial concentration and catalyst dosage on the photocatalytic degradation of methyl orange (MO) were investigated under 36 W low-power light irradiation. The degradation mechanism was revealed by scavenger test and density functional theory calculation. In addition, the cycle life of the photocatalyst was further examined. The photocatalytic decolorization degree of MO in water can reach up to 99.99% under the optimal conditions of photocatalyst usage of 0.2 g, constituent proportion of 0.5:10, initial MO concentration of 5 mg L⁻¹ and pH of 4. At the same time, the reaction rate coefficient of Langmuir–Hinshelwood is regressed as 0.05973 min⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The photocatalyst presents a superior photocatalytic oxidation performance with the degradation degree remaining up to 99.8% for MO even after recycling three times. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":"1679-1692"},"PeriodicalIF":2.4,"publicationDate":"2025-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647867","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 immobilization of TiO2 on silk screens for enhanced photocatalytic wastewater treatment","authors":"Daiane Marques de Oliveira,&nbsp;Ana Caroline Raimundini Aranha,&nbsp;Patricia Hissae Yassue-Cordeiro,&nbsp;Mara Heloisa Neves Olsen Scaliante,&nbsp;Marcos de Souza","doi":"10.1002/jctb.7896","DOIUrl":"10.1002/jctb.7896","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Advanced oxidative processes (AOPs) have emerged as a promising alternative for wastewater treatment, with photocatalysis standing out as a particularly effective approach. The use of titanium dioxide (TiO₂) as the primary photocatalyst is well-established among researchers, especially in suspension. However, the challenge of separating the catalyst powder from the treated effluent has driven the development of immobilized catalyst systems. Immobilization facilitates catalyst reuse, provided that an adhesion method ensures strong attachment to the support material, preventing catalyst loss during repeated cycles.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS AND CONCLUSION</h3>\u0000 \u0000 <p>The study investigated the immobilization of TiO₂ on screens for photocatalytic processes, aiming for improved reuse and pollutant degradation efficiency. The wash-coating method was used to test different supports and drying conditions. The best result was obtained with P25 TiO₂ immobilized on a silk screen and dried at 80 °C for 36 h, ensuring a uniform and adherent coating. Characterization by SEM, EDX, FTIR, and ATR confirmed the catalyst's presence, and the band-gap value was consistent with the literature. The material achieved over 95% methyl orange degradation, with optimal performance at pH 4. Reuse tests showed high stability, maintaining efficiency after five cycles. Comparison with photolysis confirmed that photocatalysis was the primary degradation mechanism. The results highlight the effectiveness of immobilized TiO₂ on silk screens as a low-cost and sustainable alternative 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 8","pages":"1656-1666"},"PeriodicalIF":2.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647796","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":"Comparison of enzymatic degradation of tetracycline hydrochloride by laccases from different sources","authors":"Linying Zhou,&nbsp;Hao Wang,&nbsp;Fengqin Shen,&nbsp;Jianhong Yang,&nbsp;Jun Cai","doi":"10.1002/jctb.7894","DOIUrl":"10.1002/jctb.7894","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Enzymatic degradation has been recognized as an efficient and environmentally-friendly method for pollutant removal, and has attracted increasing attention. Here, the catalytic removal of tetracycline hydrochloride (TC·HCl) from water using two different sources of laccase (EC 1.10.3.2), <i>Rhus vernicifera</i> laccase (L_<i>Rv</i>) and <i>Aspergillus oryzae</i> laccase (L_<i>Ao</i>), is comparatively evaluated for the first time, and the role of ABTS as a mediator is studied.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In the presence of ABTS, the laccases can effectively remove TC·HCl and its antibiotic activity in weakly acidic environments (pH 4.0–6.0). The efficiency of TC·HCl degradation in the L_<i>Ao</i>-ABTS system was much higher than that in the L_<i>Rv</i>-ABTS system. When the concentrations of laccase, TC·HCl and ABTS were 60, 20 and 15 mg L⁻¹, respectively, the former degraded 71.3% of TC·HCl at 20 °C and pH 4.0 in 5 h, whereas the latter only degraded 35.1% of TC·HCl. At a molar ratio of ABTS to TC·HCl of 2, L_<i>Ao</i> completely degraded TC·HCl within 3 h. However, ABTS was consumed in the L_<i>Ao</i> system and not in the L_<i>Rv</i> system. In the L_<i>Ao</i>-ABTS system, L_<i>Ao</i> concentration, pH value and visible light irradiation significantly affected TC·HCl degradation whereas they only had a slight effect in the L_<i>Rv</i>-ABTS system. Additionally, the degradation pathways of TC·HCl are more complex in the L_<i>Ao</i>-ABTS system.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study indicates that there are significant differences in the mechanisms and influencing factors of two different sources of laccase for removing antibiotics from water, which helps to promote the application of laccase in environmental bioremediation. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":"1645-1655"},"PeriodicalIF":2.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647795","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":"Assessment of the electrochemical production of sodium perborate","authors":"Omar González Pérez,&nbsp;Florencia B Martínez,&nbsp;José M Bisang","doi":"10.1002/jctb.7899","DOIUrl":"10.1002/jctb.7899","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The convenient operating conditions for the electrochemical production of sodium perborate were first estimated by using a rotating ring-disc electrode. Based on these results two reactors – cylindrical batch and a recirculating parallel-plate arrangement coupled with a reservoir – were examined, employing as anolyte a solution of sodium carbonate, borax and sodium silicate as a stabilising agent. With the use of the recirculating system the behaviour of platinum and boron-doped diamond as anode materials was analysed, employing also different separators between the anodic and cathodic compartments.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The recirculating system with a platinum anode showed suitable performance at a current density of 100 mA cm⁻² and a temperature of 10 °C. Under these operating conditions, the sodium perborate concentration was 97.6 mmol L⁻¹ with a current efficiency of 21.4%. The specific energy consumption was 1.9 kW h mol⁻¹ and the space–time yield was 29.3 mol m⁻³ h⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>A powder of monohydrate sodium perborate was obtained with 20 g L⁻¹ NaOH as the initial catholyte concentration, alkalised the anolyte after electrolysis, settled at 10 °C, and after drying in a vacuum oven at 40 °C. The particles form oblong-shaped agglomerates of different sizes, of the order of 50 μm. Thus the electrosynthesis of this oxidising agent is appraised as an alternative procedure to the chemical method. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 8","pages":"1693-1701"},"PeriodicalIF":2.4,"publicationDate":"2025-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647794","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":"Biodegradation, mechanical and biocompatibility evaluation of compact and porous polylactic acid after long-term dynamic fluid immersion","authors":"DV Portan,&nbsp;A Angelopoulou,&nbsp;A Koliadima,&nbsp;LC Kontaxis,&nbsp;G Michanetzis,&nbsp;D Kouzoudis,&nbsp;E Michalopoulos,&nbsp;GC Papanicolaou","doi":"10.1002/jctb.7893","DOIUrl":"10.1002/jctb.7893","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Polylactic acid (PLA) is the most widely used thermoplastic in applications in the benefit of humans, such as biomedicine and food packaging. However, its behaviour when operating in relevant environments has not been fully investigated. In this research, the effect of the long-term interaction between biocompatible PLA and a physiological fluid was monitored.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The weight variation of the samples, as well as their micro- and nanomechanical properties, were evaluated during PLA immersion until dissolution. Scanning electron micrographs indicated degradation of the PLA layer line from Day (D)3 onwards. More pronounced damage involved plasticization and breakage was noted after D14. The weight of the samples started to decrease considerably after the first month of immersion. Scaffolds were dissolved after D70 of immersion. The microscopic compression modulus decreased from 100 to 45 MPa within 42 days of immersion. Nanoindentation testing indicated important degradation of surface properties (stiffness and hardness) by D70 after immersion, especially in the case of higher loading forces of 3000 μΝ. Biomarker analysis of stem cells deposited on the substrates revealed a correlation between material degradation profile and biomarkers variations.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The biodegradation rate and the mechanical performance of both compact and porous samples were investigated after their immersion in cell culture medium, which closely mimics the body fluid composition, in a dynamic environment involving stirring conditions and body temperature. A correlation was found between the degradation of properties at the microscale with nanoscale events and stem cell feedback. © 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 8","pages":"1632-1644"},"PeriodicalIF":2.4,"publicationDate":"2025-05-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7893","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647734","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}