Journal of chemical technology and biotechnology最新文献

{"title":"Trametes cingulata: A white rot fungus in decolorization of azo dye reactive red 239","authors":"Juliana Feijó de Souza Daniel,&nbsp;Fausto Rodrigues Cardoso,&nbsp;Karina B Angilelli,&nbsp;Carolina Andrella Gomes,&nbsp;Lucas Magalhães Abreu,&nbsp;Orlando de Carvalho Junior","doi":"10.1002/jctb.7797","DOIUrl":"https://doi.org/10.1002/jctb.7797","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Azo dyes in textile effluents represent a particular health concern because they include azo groups (NN), which are reactive with DNA nucleic acids. The enzymes produced by white rot fungi can biodegrade a broad range of environmental contaminants. This work addresses this by concentrating on novel and effective optimal conditions for <i>Trametes cingulata</i> to produce oxidative enzymes and the capacity to decolorize the azo dye reactive red 239.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>A multifactorial experimental design optimized enzymatic activity and azo dye decolorization. Concentrations of 2.5 g L⁻¹ of copper sulfate (CS) and 3.0 g L⁻¹ of yeast extract (YS) for 16 days produced 100% decolorization, with 7.72 U mL⁻¹ of laccase (Lac) and 0.013 U mL⁻¹ of lignin peroxidase (Lip). These were found to be the ideal conditions for the decolorization process. The maximal Lac activity was 12.22 U mL⁻¹ with 2.5 g L⁻¹ CS, 25.0 g L⁻¹ YS and 16 days, in addition to 0.14 U mL⁻¹ Lip activity and 59% decolorization. It was possible to ascertain that the dye's functional groups had been adsorbed to the fungal mycelium by employing Fourier transform infrared spectroscopy. Images obtained from scanning electron microscopy analyses enable the distinction of certain features that signify the adsorption process. Additionally, under ideal decolorization conditions, a 55% chemical oxygen demand decrease was noted.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The findings reported show that <i>T. cingulata</i> may decolorize effluents containing azo dyes using two distinct processes: fungal mycelium biosorption and enzymatic degradation. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"577-590"},"PeriodicalIF":2.8,"publicationDate":"2025-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397019","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":"Correction to ‘Reusing ceramic waste in fired brick and as cement additive’","authors":"","doi":"10.1002/jctb.7806","DOIUrl":"https://doi.org/10.1002/jctb.7806","url":null,"abstract":"<p>\u0000 <span>Zoqi, MJ</span>, <span>Doosti, MR</span>, <span>Reusing ceramic waste in fired brick and as cement additive</span>. <i>J Chem Technol Biotechnol</i> <span>2024</span>; <span>99</span>: <span>649</span>–<span>57</span>.</p><p>Mohamad Hossein Shoja Taghi Abad has been added as a co-author to this article due to his contribution during the research phase of the study. This inclusion rectifies an oversight in the original publication.</p><p>The corrected author list and their affiliation is as follows:</p><p>Mohamad Javad Zoqi,¹ Mohammad Reza Doosti,¹ Mohamad Hossein Shoja Taghi Abad¹</p><p>¹Department of Civil Engineering, University of Birjand, Birjand, Iran</p><p>We apologize for this error.</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"666"},"PeriodicalIF":2.8,"publicationDate":"2025-01-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7806","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396758","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":"Fabrication of thin-film composite mixed matrix membrane with 2D magnesium oxide for gas separation application","authors":"Muhd Izzudin Fikry Zainuddin,&nbsp;Abdul Latif Ahmad,&nbsp;Mohamad Alif Adnan","doi":"10.1002/jctb.7807","DOIUrl":"https://doi.org/10.1002/jctb.7807","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Increased concentration of carbon dioxide (CO₂) emission leads to climate change. Hollow-fibre membrane technology seems feasible due to its high packing density, facile processability and easily tuneable properties. A mixed matrix membrane is designed to overcome the balance of solution–dissolution phenomena. However, ensuring optimized dispersion of fillers at the outermost selective skin layer region appears to be challenging. In this study, a thin-film composite mixed matrix membrane (TFCMMM) is fabricated with a facile dip-coating method comprising a PES substrate, polydimethylsiloxane (PDMS) coating layer and magnesium oxide (MgO) nanosheet as the additive filler in the coating layer.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The loading of the MgO nanosheet was varied from 0 to 10 wt% in the PDMS coating solution. Mixed gas performance showed a similar trend to the single gas permeation test, with lower gas permeance and selectivity due to the effect of competitive sorption between the binary gas mixtures. The permeance–selectivity trade-off was absent until the MgO loading of 1.00 wt%, when CO₂/N₂ and CO₂/CH₄ improved by 35.13% and 27.55%, respectively, over pristine TFCMMM. When the MgO loading was increased beyond 2.5 wt%, filler agglomeration and leaching caused the formation of non-selective voids, reducing CO₂/N₂ and CO₂/CH₄ selectivity. The improvement in selectivity observed in this study was due to an increased tortuous pathway of the gas penetrant due to the presence of a high-aspect-ratio MgO nanosheet, resulting in slower diffusion of gas through the PDMS selective layer of the TFCMMM.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Our findings provide additional insights into the fabrication of TFCMMM using an MgO nanosheet as an additive filler in the coating layer, specifically for CO₂/N₂ and CO₂/CH₄ separation. © 2025 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"654-665"},"PeriodicalIF":2.8,"publicationDate":"2025-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396829","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":"Polyaniline-modified anodes for brewery waste treatment in microbial fuel cells: insights into inoculum selection, cell configuration, and lactic acid valorization","authors":"I. Rafael Garduño-Ibarra,&nbsp;Shruti Tanga,&nbsp;Alexandra Tsitouras,&nbsp;Chris Kinsley,&nbsp;Elena Baranova","doi":"10.1002/jctb.7805","DOIUrl":"https://doi.org/10.1002/jctb.7805","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study focuses on the treatment of brewery waste slurries (BWS) with high chemical oxygen demand (COD) using a single-chamber microbial fuel cell (MFC) inoculated with heat-treated anaerobic seed sludge. A co-substrate of 5 g L⁻¹ glycerol was added, and carbon felt (<i>CF</i>) was employed as the anode material, enhanced through <i>in situ</i> polymerization of aniline (PANI/<i>CF</i>). Additionally, the adsorption of ruthenium dioxide nanoparticles onto the modified <i>CF</i> was assessed (PANI-RO/<i>CF</i>).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Tests conducted at room temperature (19 °C to 22 °C) achieved an average COD reduction of 36%. The PANI-RO/<i>CF</i> electrode accumulated 24% more charge, resulting in the highest coulombic efficiency of 75.1%, significantly exceeding similar studies. However, the PANI-modified anode generated more energy, exceeding that of the bare <i>CF</i> by more than double, reaching 57.1 mW m⁻². An optimized working volume was identified in relation to other reported works. Microbial population analysis revealed an interaction between <i>Staphylococcus epidermidis</i> and a rarely reported psychrophilic <i>Bacillus</i> species. After 30 h, lactic acid emerged as the main by-product, with a concentration of 7.5 ± 0.6 g L⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>These findings highlight an optimization approach based on cell configuration and inoculum selection, as well as a significant valorization pathway that is frequently overlooked in the existing literature on brewery wastewater treatment using MFCs, particularly regarding the attractiveness of lactic acid production. © 2024 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 3","pages":"508-516"},"PeriodicalIF":2.8,"publicationDate":"2024-12-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7805","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397216","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":"The role of chloride in calcium precipitation from drinking groundwater","authors":"Juan Ernesto Ramírez Juárez,&nbsp;Ángel Alfonso Villalobos de Alba,&nbsp;Roxana Ramírez Rodríguez,&nbsp;Juan Armando Flores de la Torre,&nbsp;Víctor Hugo Baltazar Hernandez,&nbsp;Francisco J. Cervantes","doi":"10.1002/jctb.7803","DOIUrl":"https://doi.org/10.1002/jctb.7803","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Chloride is present in many water sources. In addition, the use of hypochlorite as a disinfectant for drinking water increases its chloride concentration. However, the effect of this prevalent ion on Ca precipitation in drinking water is poorly described, and its effect, as a function of the Ca/Mg ratio, which drives Ca precipitation, has not been studied. Accordingly, Ca precipitation was studied using batch assays at different concentrations of chloride and hypochlorite for Ca/Mg ratios of 4.0 and 1.1. The assays were performed at 20 and 25 °C. Chemical speciation analysis was performed using Visual MINTEQ software, and precipitates derived from the process were analyzed by X-ray diffraction.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Ca precipitation was influenced by the Cl⁻ concentration, causing an oversaturation of CaCO₃ with a trend to a maximum. The highest Ca precipitation was achieved at a Ca/Mg ratio of 4.0, obtained at an initial Cl⁻ concentration of 50 mg L⁻¹, both at 20 and 25 °C. For a Ca/Mg ratio of 1.1, the highest precipitation occurred at initial Cl⁻ concentrations of 10–15 mg L⁻¹ at 20 °C and 20 mg L⁻¹ at 25 °C. In ClO⁻ experiments, Ca precipitation increases proportionally with hypochlorite dosage. Greater Ca precipitation is observed at Ca/Mg = 4.0 compared to Ca/Mg = 1.1. The proportion of aragonite or calcite in the precipitates obtained depends on the presence of Cl⁻ and ClO⁻ as well as on the Ca/Mg ratio.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Chloride affects Ca precipitation by oversaturation, and the precipitation of CaCO₃ species depends on the concentration of Mg. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"635-644"},"PeriodicalIF":2.8,"publicationDate":"2024-12-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397227","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":"Separation of cadaverine from fermentation broths by salting-out","authors":"Huijie Zheng,&nbsp;Hansheng Liu,&nbsp;Xueqi Shi,&nbsp;Shuwen Liu,&nbsp;Weiyi Su,&nbsp;Hao Li","doi":"10.1002/jctb.7801","DOIUrl":"https://doi.org/10.1002/jctb.7801","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Cadaverine is an important diamine to synthesize nylon. However, the lower product concentration in the cadaverine production makes the downstream separation more complex and costly, and has become a bottleneck for large-scale production. Therefore, in this study, the salting-out was used to efficiently separate cadaverine in the simulated fermentation broth.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>After analyzing the pH of readily soluble potassium salts, three alkaline salting-out agents—K₃PO₄, K₂CO₃ and K₄P₂O₇—were utilized to perform the salting-out separation of cadaverine. The effects of the type and concentration of salting-out agents and cadaverine concentration on the distribution and selection behavior of cadaverine in the simulated fermentation broth were investigated. Particularly, when the concentration of cadaverine was 10 wt% and the K₃PO₄ concentration was 500 g/kg, the recovery rate of cadaverine in the simulated fermentation broth with K₃PO₄ salting-out agent was as high as 99.6%, which was significantly higher than that of other salting-out agents, and only 0.01 wt% cadaverine remained in the aqueous phase.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The salting-out ability of the three inorganic salts to cadaverine in the simulated fermentation broth was K₃PO₄&gt;K₂CO₃&gt;K₄P₂O₇. Furthermore, within a certain range of cadaverine concentrations, the content of cadaverine in the aqueous phase and the amount of water residue in the organic phase could be calculated using a linear regression equation. Since inorganic salts have the advantages of good stability, low cost, non-toxicity and harmlessness, the salting-out process established in this study shows good potential for industrial application. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"615-624"},"PeriodicalIF":2.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397219","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":"Exploring the influence of different vegetable oils on the stability of nanoemulsions in the presence and absence of nisin and limonene","authors":"Dimitra Giannopoulou,&nbsp;Anastasia Lampropoulou,&nbsp;Myrto Maragou,&nbsp;Athanasia Koliadima","doi":"10.1002/jctb.7804","DOIUrl":"https://doi.org/10.1002/jctb.7804","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Contamination during food production and handling is a major health concern. Traditional preservation methods often influence food quality as well as their organoleptic characteristics. In contrast, natural alternatives like bacteriocins and essential oils are emerging. Nisin, a natural antimicrobial agent, is effective against Gram-positive bacteria but not against Gram-negative bacteria. Moreover, essential oils like limonene, although they have broad antimicrobial properties, are not water-soluble and affect the sensory properties. Encapsulation in oil-in-water nanoemulsions offers a promising approach, enhancing the stability, solubility, and functionality of these natural antimicrobial agents.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Different concentrations of olive, corn, and sesame oils were used in the presence or absence of nisin and limonene. Parameters such as droplet size, polydispersity index, zeta potential, and cream index were assessed. Oil type and concentration played a crucial role in the stability and properties of produced nanoemulsions. Sesame oil-based emulsions showed superior stability, while olive oil-based emulsions performed well at lower concentrations. Nisin reduced droplet size, while limonene increased it, with combined use yielding intermediate results.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The properties and stability of oil-in-water nanoemulsions using olive, corn, and sesame oils at varying concentrations, with and without nisin and limonene, were investigated. Sesame oil-based nanoemulsions exhibited stable droplet size and lower polydispersity index values, while nisin reduced droplet size and limonene increased it. Stability assessments favoured olive oil-based formulations at low oil concentrations (2% v/v). These findings provide insights into optimizing nanoemulsion formulations for food and pharmaceutical applications. © 2024 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 3","pages":"645-653"},"PeriodicalIF":2.8,"publicationDate":"2024-12-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7804","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397220","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":"CO2 capture by new ternary nanocomposite LDH/bayerite/Ag2O in tetrametallic NiZnAgAl layered double hydroxides fabricated via in situ growth","authors":"Muh. Nur Khoiru Wihadi,&nbsp;Muh. Khoirul Maza,&nbsp;Grasianto Grasianto,&nbsp;Muhammad Ihsan Sofyan","doi":"10.1002/jctb.7800","DOIUrl":"https://doi.org/10.1002/jctb.7800","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Carbon dioxide exerts the most substantial environmental influence of all greenhouse gases. Therefore, creating novel materials that exhibit minimal energy requirements, robust CO₂ capture efficiency, outstanding adsorption and selectivity, economic viability and rapid scalability for applications in industry is important. This study aimed to fabricate the new ternary nanocomposite LDH/bayerite/Ag₂O in tetrametallic NiZnAgAl layered double hydroxide (LDH) using the hydrothermal method and to investigate its use for efficient CO₂ capture.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results showed that tetrametallic NiZnAgAl LDH, bayerite and Ag₂O had grown and formed <i>in situ</i> ternary composites in the solid. Various characterization techniques confirmed the presence of tetrametallic NiZnAgAl LDH, bayerite and Ag₂O in the composites. The composites exhibit surface areas ranging from 153.34 to 255.02 m² g⁻¹, pore volumes ranging from 0.19 to 0.26 cm³ g⁻¹ and pore diameters ranging from 4.06 to 4.93 nm. Each composite has a laminar arrangement of stacked flakes, and the surface of the composite is covered with silver oxide. Transmission electron microscopy images exhibit the nano-hexagonal construction of the composites. The selected area electron diffraction profile exhibited congruence with the X-ray diffraction data of LDH, bayerite and Ag₂O. The composites have an average particle size that ranges from 22.79 to 41.84 nm. The ternary composite exhibits CO₂ capture activity with adsorption capacities ranging from 5.88 to 8.29 mmol g⁻¹. We observed that variations in the molar ratios of Ni, Zn and Ag affected the properties of the composites.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Overall, the new ternary nanocomposites LDH/bayerite/Ag₂O in tetrametallic NiZnAgAl LDH exhibit promising potential for CO₂ capture applications. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"604-614"},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396972","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 kinetic study of nitrate removal from aqueous solution using tea waste","authors":"Lih Xuan Liew,&nbsp;Yin Fong Yeong","doi":"10.1002/jctb.7798","DOIUrl":"https://doi.org/10.1002/jctb.7798","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Nitrate contamination in groundwater poses significant risks to public health and the environment worldwide. This study explores the optimized use of tea waste, a byproduct of tea extraction and consumption, as an adsorbent for the removal of nitrate from aqueous solutions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Scanning electron microscopy and Brunauer–Emmett–Teller (BET) analysis revealed that tea waste has irregular cluster cavities and visible pore formations, indicating numerous active sites for nitrate adsorption. The specific surface area, total pore volume, and pore diameter were found to be 2.4914 m² g⁻¹, 0.0036 cm³ g⁻¹, and 9.8077 nm, respectively. A total of 20 adsorption experiments were conducted based on conditions recommended by a statistical tool using Design-Expert 13.0 software. The data showed a strong fit to a quadratic model, with a significant <i>P</i>-value of 0.0109 and a high determination coefficient (<i>R</i>² = 0.9327). Using response surface methodology, the study achieved a maximum nitrate removal efficiency of 84.49% under optimal conditions, which included an initial nitrate concentration of 50 mg L⁻¹, an adsorbent weight of 0.706 g, and a contact time of 15 min. Further analysis of adsorption isotherms and kinetics revealed that the Freundlich isotherm (<i>R</i>² = 0.9556) and the pseudo-second-order kinetic model (<i>R</i>² = 0.9454) best described the experimental data.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These findings indicate that tea waste is an effective and sustainable adsorbent for mitigating nitrate contamination in aqueous solutions, offering a promising approach to address water quality challenges globally. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"591-603"},"PeriodicalIF":2.8,"publicationDate":"2024-12-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396971","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 MgAl-LDH/halloysite composite materials for efficient CO2 adsorption","authors":"Wenjie Liu,&nbsp;Yao Zhou,&nbsp;Weifeng Gong,&nbsp;Tongtong Tang,&nbsp;Yu Yang,&nbsp;Chao Yao,&nbsp;ShiXiang Zuo,&nbsp;Xiazhang Li","doi":"10.1002/jctb.7802","DOIUrl":"https://doi.org/10.1002/jctb.7802","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>CO₂ emissions have had negative impacts on various aspects of life and the environment, making the development of materials with high CO₂ adsorption performance crucial.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Result</h3>\u0000 \u0000 <p>In this study, halloysite nanotubes (HNTs) were used as a carrier to prepare MgAl layered double hydroxide (LDH) via a convenient coprecipitation method, resulting in MgAl-LDH/HNT composite material, which was then evaluated for its CO₂ adsorption performance. The physicochemical properties of the composite material were characterized using various methods. Results showed that the 1:1 ratio MgAl-LDH/HNT composite exhibited superior material structure, with a specific surface area reaching 178.24 m² g⁻¹. In CO₂ adsorption performance tests, the 1:1 MgAl-LDH/HNT composite showed the best adsorption performance, with a CO₂ adsorption capacity of 3.91 mmol g⁻¹. This adsorption process includes physical adsorption and chemical adsorption. Kinetic analysis results indicate that the adsorption process is mainly dominated by physical adsorption. The material also demonstrated good performance in cyclic stability tests, maintaining a regeneration efficiency of over 94% after six cycles.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The MgAl-LDH/HNT material has good properties and stability. This provides an effective pathway and direction for the development of new adsorbents with higher CO₂ adsorption performance. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 3","pages":"625-634"},"PeriodicalIF":2.8,"publicationDate":"2024-12-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397218","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}