Journal of chemical technology and biotechnology最新文献

{"title":"The kinetic study of nickel carbonylation to nickel tetracarbonyl: effect of temperature, pressure and size","authors":"Fu Yin,&nbsp;Fan Qu,&nbsp;Han Yang,&nbsp;Fei Wang,&nbsp;Yuxue Wei,&nbsp;Song Sun,&nbsp;Qiang Chang,&nbsp;Chenghua Zhang","doi":"10.1002/jctb.7920","DOIUrl":"10.1002/jctb.7920","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>The nickel carbonylation reaction is of great significance for nickel extraction and the application of nickel-based materials. Previous studies have mostly been conducted on nickel without load. However, the ores used in industrial nickel extraction contain various oxides, and the size of nickel can affect the reaction. Ni/Al₂O₃ catalysts are common, and it is appropriate to study the influence of various parameters on the formation kinetics of Ni(CO)₄ on them.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Temperature, pressure and particle size have different effects on the carbonylation reaction of Ni in Ni/Al₂O₃. Specifically, the reaction rate is the fastest when the temperature is 80°C. Increasing pressure can rapidly accelerate the carbonylation reaction process. When the particle size is within 8.1–9.1 nm, the carbonylation reaction rate reaches the highest.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The study revealed that the carbonylation rate of Ni is accelerated significantly with the increase of temperature and pressure. Through the in-depth analysis of the first derivative of Ni conversion of the model sample, it is found that the reaction process of Ni with CO can be clearly divided into two stages: the first stage occurs quickly due to a large number of highly active Ni atoms contacting with CO; the second stage is accompanied by the increase of internal defects, cracks and grooves in Ni particles, and these structural changes make more Ni sites exposed. In addition, small size of Ni exhibited higher initial activity than large size of Ni, but could have a lower reaction degree after sufficient reaction time. © 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":"1838-1847"},"PeriodicalIF":2.4,"publicationDate":"2025-06-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888465","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 co-digestion of poultry litter and swine wastewater: the effect of enriched inoculum on biogas production","authors":"Juliana Gaio Somer,&nbsp;Franciele Natividade Luiz,&nbsp;Tiago Joelzer Marteres,&nbsp;Rafaela Faust Meyer,&nbsp;Suzan Prado Fernandes Bernal,&nbsp;Jackeline Tatiane Gotardo,&nbsp;Gustavo Henrique Pedroso,&nbsp;Michel Rodrigo Zambrano Passarini,&nbsp;Marcela Boroski","doi":"10.1002/jctb.7921","DOIUrl":"10.1002/jctb.7921","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Co-digestion of substrates represents a viable strategy to enhance biogas production. This study evaluates biogas generation from the liquid fraction obtained through phase separation of co-digested swine manure and poultry litter, to assess the influence of the inoculum-to-substrate ratio (ISR) and to analyze the effect of microbial inoculum enrichment on the anaerobic digestion process. Methane production potential tests were conducted using a Doehlert experimental design, with co-digestions comprising 0–40% (w/w) poultry litter, and ISR levels of 2, 1.25 and 0.5.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The highest methane production values (286–284 NL kgVS⁻¹) were achieved in co-digestions containing 10% to 20% (w/w) poultry litter, conditions that are compatible with the use of covered lagoon or continuous stirred tank reactor-type digesters. In the microbial inoculum enrichment study, a 34% increase in methane production was observed compared to the use of standard inoculum.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>The co-digestion of swine manure and poultry litter, followed by phase separation and anaerobic digestion of the liquid fraction, proved to be a feasible strategy, achieving up to a sevenfold increase in methane production per ton of added substrate. Microbial enrichment further promoted a significant increase in methane yield; however, this approach requires further development for full-scale application. Gompertz kinetic modeling produced results closely matching the experimental data. © 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 9","pages":"1863-1872"},"PeriodicalIF":2.4,"publicationDate":"2025-06-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7921","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888549","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":"Ultrasound-assisted degradation of Procion Brilliant Orange M-2R dye using ultrasonic flow cell combined with oxidants","authors":"Rahat F Momin,&nbsp;Parag R Gogate","doi":"10.1002/jctb.70000","DOIUrl":"10.1002/jctb.70000","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The current research investigates the degradation of Procion Brilliant Orange M-2R utilizing an ultrasonic (US) flow cell in conjunction with oxidants. The treatment scheme involved optimizing the pH (3–8), operating power (750–1200 W) and recirculation flow rate (200–800 mL min⁻¹) to achieve maximum decolorization through the use of only the US flow cell followed by combination studies with various oxidants for intensification.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The highest decolorization attained was 74.7%, while mineralization reached 24.6% using an individual US flow cell under optimum conditions of initial concentration of dye of 20 ppm, pH of 3, power of 1200 W and circulating flow rate of 400 mL min⁻¹. Subsequently, the efficacy of various combinations of the US flow cell with oxidants, specifically US + H₂O₂, US + Fenton's reagent, US + potassium persulfate (KPS) and US + FeSO₄⋅7H₂O + KPS, was studied confirming that higher decolorization of 93%, 93.8%, 92.4% and 95.5% for those combinations, respectively, was obtained. The decolorization followed second-order kinetics across all methods employed, and the obtained rate constants confirmed the synergism for the combinations. Toxicity assessments, alongside high-resolution liquid chromatography–mass spectrometry analysis, demonstrated that no toxic intermediates were introduced into the reaction mixture during the treatment. Cavitational yield and treatment cost were also estimated to compare various approaches used in the work.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Overall, the combination of the US flow cell with FeSO₄⋅7H₂O and KPS demonstrated maximum efficacy in degrading Procion Brilliant Orange M-2R dye. © 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":"1873-1884"},"PeriodicalIF":2.4,"publicationDate":"2025-06-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885311","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":"Effects of temperature on biofilm formation and resource recovery during anoxyphototrophic treatment of fuel-synthesis wastewater","authors":"Sultan Shaikh,&nbsp;Soumia Gasmi,&nbsp;Adriaan Stephanus Luyt,&nbsp;Gordon McKay,&nbsp;Hamish Robert Mackey","doi":"10.1002/jctb.7919","DOIUrl":"10.1002/jctb.7919","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Fuel-synthesis wastewater (FSW), a byproduct of the Fischer-Tropsch process, requiring efficient treatment and resource recovery strategies. This study aimed to optimize temperature conditions for purple non-sulfur bacteria (PNSB) biofilm formation and bioproduct recovery while simultaneously treating FSW. Experiments were conducted in biofilm photobioreactors operated at 30 °C, 35 °C, and 45<span> </span>°C under illuminated anaerobic conditions. The study evaluated PNSB growth, wastewater treatment efficiency, and the yields of bioproducts, including polyhydroxybutyrate (PHB), single cell protein (SCP), lipids, carbohydrates and pigments.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>No PNSB growth was observed at 45 °C, while the highest suspended growth occurred at 35 °C and biofilm growth at 30 °C. Biofilm formation significantly increased PHB accumulation (17%) compared to suspended growth (4.3%–7.4%), highlighting the efficiency of biofilm-based cultivation. Temperature had a minimal effect on PHB composition but influenced its crystallinity and morphology. The protein content remained consistent across conditions, while lipids increased with temperature.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Temperature selection between 30 °C and 35 °C significantly influences biofilm <i>versus</i> suspended biomass ratios and differentially affects bioproduct yields. Biofilm cultivation is preferable for maximizing PHB recovery, indicating potential for sustainable resource recovery and wastewater treatment strategies, particularly in tropical regions where external temperature regulation may be unnecessary. © 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 9","pages":"1848-1862"},"PeriodicalIF":2.4,"publicationDate":"2025-06-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7919","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885290","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":"From shake flasks to a bench-scale bioreactor: scaling up exopolysaccharide production in fed-batch cultivation of Ensifer meliloti SEMIA 135","authors":"Rui dos Santos Ferreira Filho,&nbsp;Janaína Fernandes de Medeiros Burkert,&nbsp;Carlos André Veiga Burkert","doi":"10.1002/jctb.7916","DOIUrl":"10.1002/jctb.7916","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study investigates the production scale-up of exopolysaccharide (EPS) by <i>Ensifer meliloti</i> SEMIA 135 from shake flasks to a 5 L bench-scale fed-batch bioreactor. Soybean molasses was the cost-effective nutrient source. The primary aim was to improve conditions for maximizing EPS yield and minimizing production costs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Various molasses concentrations (30 to 50 g L⁻¹), with and without yeast extract and mineral salts, were tested in shake flasks. Agitation and operational modes (batch and fed-batch) were then evaluated in the bioreactor. Results showed that yeast extract is unnecessary (a cost-reduction factor) since soybean molasses supplemented with mineral salts achieved similar EPS production. The highest molasses concentrations inhibited the EPS synthesis. Best-performing bioreactor conditions (200 rpm, 1.25 vvm) in the fed-batch mode yielded 14.4 g L⁻¹ EPS. It meant increase of 67% by comparison with the batch mode. EPS exhibited high molecular weight (9.266 × 10⁷ Da), polyanionic character (zeta potential −36.03 mV at pH 7) and functional groups which are typical of rhizobial EPS. Its rheological behavior followed the Herschel-Bulkley model, i.e., viscosity decreased at high pH, and it showed remarkable thermal stability (melting point was 203 °C).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study highlights the potential of soybean molasses in cost-effective EPS production. Fed-batch conditions improved EPS yields significantly. EPS properties underline its potential for industrial applications and, thus, generation of knowledge about scalable biopolymer production. © 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 9","pages":"1818-1830"},"PeriodicalIF":2.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://scijournals.onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7916","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888284","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":"Influence of support of CuNi bimetal catalysts in the hydrogenative rearrangement of furfuryl alcohol to cyclopentanone","authors":"Zhihao Cao,&nbsp;Xinyue Zhao,&nbsp;Qi Yang,&nbsp;Wenjuan Zhou,&nbsp;Hao Xu,&nbsp;Yejun Guan,&nbsp;Peng Wu","doi":"10.1002/jctb.7918","DOIUrl":"10.1002/jctb.7918","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The sustainable synthesis of cyclopentanone from biomass-derived furfural and/or furfuryl alcohol has attracted widespread attention in the carbon-neutral industry. In this study, we investigated the influence of support textural properties and acidity on the catalytic performance of supported CuNi alloy nanoparticles (5 wt%–5 wt%).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>CuNi alloy particles with a size of approximately 16 nm were obtained on SiO₂ and Al-containing siliceous materials (Al-MCM-41, MCM-22, USY-6, ZSM-5 and H-Beta). The number of total acid sites follows the trend of 5Cu5Ni/H-Beta (1.37 mmol g⁻¹) &gt; 5Cu5Ni/ZSM-5 (1.03 mmol g⁻¹) &gt; 5Cu5Ni/MCM-22 (0.87 mmol g⁻¹) &gt; 5Cu5Ni/USY-6 (0.70 mmol g⁻¹) &gt; 5Cu5Ni/Al₂O₃ (0.35 mmol g⁻¹) &gt; 5Cu5Ni/SiO₂ (0.24 mmol g⁻¹). 5Cu5Ni/ZSM-5 shows the largest amount of strong acid sites with <i>ca</i> 0.43 mmol g⁻¹. Catalytic tests indicated that furfuryl alcohol is a more effective starting reagent for this process than furfural. When an aqueous solution of furfuryl alcohol (5 wt%) was used, 5Cu5Ni/H-Beta exhibited 67% selectivity for cyclopentanone with almost 100% furfuryl alcohol conversion. Moreover, the 5Cu5Ni/H-Beta catalyst exhibited good reusability.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Supports with moderately acidic sites and fewer strongly acidic sites (MCM-41, MCM-22, USY-6 and H-Beta) favored the tandem synthesis of cyclopentanone from furfuryl alcohol. © 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":"1831-1837"},"PeriodicalIF":2.4,"publicationDate":"2025-06-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144888279","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":"In Focus: Biotechniques for air pollution control and biorefinery","authors":"Christian Kennes","doi":"10.1002/jctb.7912","DOIUrl":"10.1002/jctb.7912","url":null,"abstract":"","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 7","pages":"1391-1392"},"PeriodicalIF":2.4,"publicationDate":"2025-06-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144264640","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":"Preparation of dimethyl 1,4-cyclohexanedicarboxylate by Ru/HZSM-5-catalyzed hydrogenation of dimethyl terephthalate","authors":"Fan Xiang,&nbsp;Bao Guo,&nbsp;Daolai Sun,&nbsp;Jianhua Lv,&nbsp;Jidong Liu","doi":"10.1002/jctb.7915","DOIUrl":"10.1002/jctb.7915","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Dimethyl 1,4-cyclohexanedicarboxylate (DMCD) has emerged as a critical feedstock in contemporary chemistry, attributed to its distinctive molecular composition and good environmental compatibility. This study explored the targeted hydrogenation of dimethyl terephthalate (DMT) to produce DMCD, with a focus on screening and optimizing various Ru-based catalysts. Of the catalysts evaluated, those supported on HZSM-5 and enriched with weak acid sites demonstrated superior catalytic performance. Additionally, the impact of various reaction conditions on DMT conversion and DMCD selectivity was thoroughly examined.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The Ru/HZSM-5 catalysts, synthesized <i>via</i> the impregnation technique, exhibited remarkable catalytic efficiency in the reduction of DMT. Ru on the HZSM-5 support primarily exists in the forms of Ru⁰ and Ru⁴⁺, with the Ru⁰ content identified as the critical factor governing the catalytic performance. Under the experimental parameters of 160 °C, 2.5 MPa H₂, and 2 h reaction time, the 3 wt.% Ru/HZSM-5 catalyst could achieve 100% DMT conversion and 99.5% DMCD selectivity. Furthermore, the catalyst maintained high activity after three cycles of use.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The Ru/HZSM-5 catalyst displays outstanding stability during the hydrogenation of DMT to DMCD. The exceptional performance is ascribed to the moderate Ru loading, the even distribution of Ru nanoparticles, and the synergistic effects between the high hydrogenation activity of Ru⁰ and the weak acidic sites of HZSM-5. This research offers a novel approach to designing effective and stable hydrogenation catalysts and establishes a crucial foundation for the sustainable synthesis of DMCD. © 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":"1806-1817"},"PeriodicalIF":2.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144885081","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":"Biomolecule-assisted synthesis of magnetic biochar from betel nut husk and iron ore tailings: characterization and arsenic elimination studies","authors":"Rutuja T Kamble,&nbsp;MG Sujana","doi":"10.1002/jctb.7906","DOIUrl":"10.1002/jctb.7906","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Arsenic contamination in drinking water remains a significant global public health issue, necessitating sustainable and efficient removal technologies. In this work, magnetite-biochar composites were synthesized through a green and cost-effective approach using betel nut husk-derived biochar and iron ore tailings, with <i>Hibiscus rosa sinensis</i> leaf extract serving as a natural biosurfactant and reducing agent. The synthesis plan aimed to utilize agricultural and industrial waste materials to fabricate a functionalized magnetic adsorbent with improved physicochemical properties for arsenic species elimination.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The optimized Fe₃O₄@BC composite (Fe:BC ratio = 1:2) demonstrated a substantial BET (Brunauer-Emmett-Teller) surface area of 73 m² g⁻¹. X-ray diffraction patterns confirmed the successful formation of crystalline magnetite nanoparticles anchored to the biochar matrix. Fourier transform infrared and field emission scanning electron microscopy/energy dispersive X-ray spectroscopic analyses evidenced the presence of active functional groups and uniform magnetite dispersion on the Fe₃O₄@BC surface. The green synthesis route, facilitated by <i>hibiscus</i> leaf phytochemicals, contributed to improved nanoparticle stability and surface functionality, enabling efficient arsenic removal from aqueous solutions. Batch experiments confirmed maximum adsorption capacities of 42.74 and 27.62 mg g⁻¹ for arsenic(V) and arsenic(III), respectively. The material demonstrated favourable kinetics, minimal interference from coexisting ions and effective regeneration over three cycles.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The environmentally benign synthesis of Fe₃O₄@BC using biomass waste and mine tailings, assisted by plant-derived biomolecules, offers a low-cost, scalable and sustainable adsorbent for arsenic elimination. The material's high surface properties and promising removal performance in real water systems highlight its potential for field-scale applications in water purification. © 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":"1724-1736"},"PeriodicalIF":2.4,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144647069","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":"Processing of agroindustrial byproducts from the cocoa (Theobroma Cacao L.) production chain to obtain bioactive compounds through supercritical fluid extraction and enzyme-assisted extraction and their potential application","authors":"Anny Quiceno-Suarez,&nbsp;Edith M Cadena-Chamorro,&nbsp;Héctor J Ciro-Velásquez","doi":"10.1002/jctb.7909","DOIUrl":"10.1002/jctb.7909","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>There has been a growing interest in the potential value of highly applicable bioactive substances found in agroindustrial byproducts like cocoa husks and shells for the food and pharmaceutical industries. In this context, extracting bioactive compounds of the lignocellulosic matrix using nonconventional or green extraction methods becomes challenging. This study used an experimental strategy to apply supercritical fluid extraction (SFE) and enzyme-assisted extraction (EAE) to cocoa processing byproducts.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Husk SFE extracts, obtained under optimized conditions (58 °C, 7.5 MPa and 22.3% ethanol), showed a high value of total phenolic content (45.67 mg GAE g⁻¹) and antioxidant capacity (DPPH: 289.43 μmol Trolox g⁻¹; ABTS: 304.80 μmol Trolox g⁻¹) compared to those of the shell SFE extracts (19.15 mg GAE g⁻¹, DPPH 90.96 μmol Trolox g⁻¹ and ABTS 104.56 μmol Trolox g⁻¹) obtained at 53.3 °C, 7.3 MPa and 22.2% ethanol. Fatty acid profile of the shells was noteworthy due to the presence of epicatechin, catechin, theobromine and caffeine, as well as substantial quantities of stearic and palmitic acid. EAE–SFE increased the yield, antioxidant capacity and total polyphenol content of husk SFE extracts. The potential of the extracts lies in their antimicrobial capacity. An inhibition halo was observed against <i>S. mutans</i> using the SFE husk extract and against <i>E. coli</i> using shell extract obtained by EAE–SFE. The presence of methylxanthines and polyphenols is thought to be responsible for this reaction.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Cocoa byproducts can be used to obtain bioactive compounds with antioxidant and antimicrobial potential, suggesting their potential application in various fields. © 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":"1702-1715"},"PeriodicalIF":2.4,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144646916","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}