Journal of chemical technology and biotechnology最新文献

{"title":"Anti-fouling loose polyamide nanofiltration membrane preparation by biodegradable sophorolipids for precise separation of simulated dyeing wastewater","authors":"Xin-Xi Ding,&nbsp;Cheng Jiang,&nbsp;Mingguang Li,&nbsp;Xianghong Li,&nbsp;Dan-Dan Shao","doi":"10.1002/jctb.7795","DOIUrl":"https://doi.org/10.1002/jctb.7795","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Strengthening the recycling and utilization of resources is deeply significant in achieving carbon neutrality. The nanofiltration membranes possess separation ability within the nanoscale by utilizing special pore size ranges and surface charge properties, showing great application prospects in resource recycling. The commercial nanofiltration membranes are mainly prepared by interfacial polymerization with fast reaction speed and easy scaling-up advantages. However, the obtained polyamide nanofiltration membranes possess dense selective layers with low permeance and separation efficiency to the molecules. Herein, the biodegradable surfactant sophorolipid was added to the aqueous solution to improve the performance of the polyamide nanofiltration membranes.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Compared with the traditional nanofiltration membranes, the permeance of the sophorolipid-modified nanofiltration membrane was improved from 3 to 18 L·m⁻²·h⁻¹·bar⁻¹. The modified membrane showed high rejection of the dyes with large molecular structures and low rejection of those with small molecular structures.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The modified membrane may separate the mixed dye solution of congo red (molecular weight 696.66 g/mol) and indigo carmine (molecular weight 407.98 g/mol) and the mixed congo red/NaCl solution precisely. Besides, the modified membrane showed good anti-fouling properties in the long-term stability test. This study may offer research significance for the resource treatment of printing and dyeing wastewater. © 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":"568-576"},"PeriodicalIF":2.8,"publicationDate":"2024-12-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397163","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":"Hydrogenation of biomass-derived succinic acid to form 1,4-butanediol over Co/SiO2 catalyst","authors":"Chenwei Liu,&nbsp;Ran Jing,&nbsp;Yue Li,&nbsp;Daolai Sun,&nbsp;Jianhua Lv","doi":"10.1002/jctb.7793","DOIUrl":"https://doi.org/10.1002/jctb.7793","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Succinic acid is a vital platform chemical derivable from lignocellulosic biomass. Various non-noble metal catalysts were used to hydrogenate succinic acid and produce 1,4-butanediol in this study. Among them, Co-loaded SiO₂ with a moderate mean pore size of 10 nm exhibited a superior catalytic performance.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The high catalytic activity of Co-loaded SiO₂, which was prepared by an impregnation method, was demonstrated in the hydrogenolysis of succinic acid to provide 1,4-butanediol. The Co/SiO₂ catalyst reduced at 400 °C and calcined at 300 °C existed in the form of Co²⁺ and Co⁰, exhibiting a high catalytic activity. The production of 1,4-butanediol from succinic acid was significantly enhanced at a temperature of 200 °C and an H₂ pressure exceeding 5 MPa. At 200 °C and 7 MPa H₂ pressure, a 1,4-butanediol selectivity of 67.8% and a full succinic acid conversion were obtained over Co/SiO₂.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The Co-loaded SiO₂ with a moderate mean pore size of 10 nm was conducive to the efficient generation of 1,4-butanediol from succinic acid. The Co/SiO₂ catalyst reduced at 400 °C existed in the form of Co⁰ and Co²⁺. It was suggested that the efficient synthesis of 1,4-butanediol from succinic acid was facilitated by the cooperative action of Co⁰ and Co²⁺. © 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":"545-554"},"PeriodicalIF":2.8,"publicationDate":"2024-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143396853","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 coagulation–Fenton oxidation and coagulation–adsorption processes in textile and chemical industry mixed wastewater","authors":"Aysun Enfiyeci,&nbsp;Deniz İzlen Çifçi","doi":"10.1002/jctb.7789","DOIUrl":"https://doi.org/10.1002/jctb.7789","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In this study, the treatment of mixed wastewater from textile and chemical industries using coagulation followed by Fenton oxidation or adsorption processes was investigated. In the coagulation process, the effects of pH and coagulant dosage were examined using polyaluminium chloride, FeCl₃ and alum. The effects of Fe²⁺ and H₂O₂ concentrations, pH and oxidation time on Fenton oxidation of coagulated mixed industrial wastewater were also investigated. In the adsorption process, the effects of pH, adsorbent dosage and adsorption time were evaluated using coconut-based activated carbon (Coconut-AC) and coal-based activated carbon (Coal-AC).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In coagulation, 68.5% chemical oxygen demand (COD), 63.1% total organic carbon (TOC) and 94.3% color removal were achieved with FeCl₃ at pH 5 and a coagulant dose of 600 mg L⁻¹. Coagulation–Fenton oxidation resulted in 95.7% COD, 84.1% TOC and 99.0% color removal with 1500 mg L⁻¹ Fe²⁺ and 6000 mg L⁻¹ H₂O₂ at pH 3. In the coagulation–adsorption process, 97.5% COD, 95.5% TOC and 99.5% color removal were obtained using Coconut-AC with an adsorbent dosage of 40 g L⁻¹ at pH 3, while 92.3% COD, 82.4% TOC and 99.2% color removal were obtained with Coal-AC at pH 3 and an adsorbent dosage of 30 g L⁻¹.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Effective treatment of mixed industrial wastewater from the textile and chemical industries can be achieved more quickly using Coconut-AC for adsorption following coagulation. Conversely, the same removal efficiencies can be reached over a longer duration with Fenton oxidation after coagulation. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"466-476"},"PeriodicalIF":2.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110331","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":"Looking for improved strains of Azotobacter vineladii and favorable culture conditions yielding high-molecular-weight poly(3-hydoxybutyrate)","authors":"R Quiroz-Cardoso,&nbsp;T Castillo,&nbsp;E Galindo,&nbsp;J Ruíz Escobedo,&nbsp;D Segura,&nbsp;C Peña","doi":"10.1002/jctb.7790","DOIUrl":"https://doi.org/10.1002/jctb.7790","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Poly(3-hydroxybutyrate) (P3HB) is a polymer that presents properties similar to those of conventional plastics. The objective of the present study was to evaluate the influence of oxygen transfer rate (OTR) on the production and molecular weight of P3HB synthesized by the OP-PhbP2⁻ and OP-PhbP3⁺ mutant strains of <i>Azotobacter vinelandii</i>, which have inactivated the gene that expresses the PhbP2 phasin and overexpresses the PhbP3 phasin genes, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>Under high OTR_max (6.0 ± 0.04 mmol O₂ L⁻¹ h⁻¹) mutant OP-PhbP3⁺ exhibited a higher growth rate (0.12 ± 0.01 h⁻¹) and P3HB production (6.77 ± 0.19 g L⁻¹) than that achieved in the cultures using the OP-PhbP2⁻ mutant and OP wild-type strains (5.0 ± 0.1 g L⁻¹ for both strains). Under that condition, the OP-PhbP3⁺ strain also exhibited a lower specific oxygen consumption rate. In contrast, under a low OTR_max (2.8 ± 0.06 mmol O₂ L⁻¹ h⁻¹), the OP-PhbP2⁻ strain had a better performance, reaching 4.5 ± 0.35 g L⁻¹ of P3HB, during the stationary phase (36–72 h). Both mutant strains produced a polymer with a high molecular weight (close to 8000 kDa), regardless of the OTR of the cultures, which remained constant throughout the fermentation. In contrast, the molecular weight produced by the OP strain was in the range 5500 to 6700 kDa under the two conditions evaluated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>Overall, our results revealed the biotechnological potential of using modified strains, which overexpress PhbP3 phasin or have inactivated the gene that expresses the PhbP2 phasin, for the production of P3HB, affording a higher molecular weight than that produced by the OP strain. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"477-487"},"PeriodicalIF":2.8,"publicationDate":"2024-12-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143110330","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":"Treatability of diclofenac and triclosan solutions by catalytic and photocatalytic oxidation processes","authors":"Eylem Topkaya,&nbsp;Ayla Arslan","doi":"10.1002/jctb.7791","DOIUrl":"https://doi.org/10.1002/jctb.7791","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In recent years, advanced oxidation processes (AOP) have gained importance as highly effective methods in the treatment of organic substances with toxic and permanent properties. Diclofenac (DCF) and Triclosan (TCS) pollutants, which are from the endocrine disrupting chemicals (EDCs) that were encountered in various aquatic environments such as inlet and outlet waters of treatment plants, surface waters, drinking water, groundwater and sediments were reported in the literature. In this study, mineralisation of DCF and TCS pollutants, which were the EDCs, were investigated by AOPs. The applied processes were O₃, O₃/UV, O₃/ZnO, UV/ZnO, and O₃/UV/ZnO. The studies were carried out at two different initial concentrations (5 and 10 mg/L), at 5 ppm ozone dose, 2 × 8 W UVC light, 0.1 g ZnO, in the original pH, and 30 min reaction time.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The highest COD and TOC removal efficiencies were determined in O₃/UV/ZnO process as 82% COD, 71% TOC at 5 mg/L concentration for DCF pollutant and as 72% COD, 75% TOC at 10 mg/L concentration for TCS pollutant. For these process conditions, the ozone consumptions were determined 0.13 mgO₃/mgCOD_removed, 0.31 mgO₃/mgTOC_removed and 0.69 mgO₃/mgCOD_removed, 0.98 mgO₃/mgTOC_removed, respectively. The electrical energy per order values were found in the range of 12.33–20.88 kWh/m³ for O₃/UV/ZnO processes. Treatment costs of these processes were calculated in the range of 0.002 to 44.823 €/m³.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>For the treatability of DCF and TCS pollutants, ozone-based advanced oxidation processes, especially O₃/UV/ZnO photocatalytic ozone oxidation process were determined as a feasible process. © 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":"517-529"},"PeriodicalIF":2.8,"publicationDate":"2024-11-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143397166","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":"An insight on energy production using microbial fuel cell: A microbiological perspective and electron transfer improvement","authors":"Priya Dharshini Palanivel,&nbsp;Samsudeen Naina Mohamed,&nbsp;Gunda Mohanakrishna,&nbsp;Srinithya Ravinuthala,&nbsp;S Saravanan","doi":"10.1002/jctb.7788","DOIUrl":"https://doi.org/10.1002/jctb.7788","url":null,"abstract":"<p>Microbial fuel cells (MFCs) are sustainable energy technologies that could resolve pollution challenges brought by various activities. It can meet energy demand by producing bioelectricity through catabolizing organic matter. Over the past two decades, research on many microbes have been used in MFCs, which intrigued researchers to explore the underlying electron transfer mechanism between microbe and anode. Electron transfer between electrode and microorganism occurs via different pathways: direct, indirect electron transfer and interspecies electron transfer. <i>Shewanella</i> and <i>Geobacter</i> are well-known for microbe–electrode and microbe–microbe electron transfer. This review provides an overview of the significant varieties of microbes utilized in MFCs for simultaneous bioelectricity generation and wastewater treatment. Mechanisms of different modes of electron transfer involved during the oxidation of organic wastes in the anode section of MFCs are highlighted. Furthermore, this review also details some of the techniques to promote extracellular electron transfer efficiency which is important for the enhanced performance of MFC in terms of power, current generation and wastewater remediation. A perspective of challenges to be addressed for the effective functioning of these technologies, opportunities for MFC systems to be scaled up and associated techno-economic analysis are discussed. © 2024 Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 4","pages":"672-687"},"PeriodicalIF":2.8,"publicationDate":"2024-11-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143717343","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Impact of intermittent power supply on electrokinetic remediation of chromium-contaminated soil","authors":"Zhaoqin Huang,&nbsp;LinChao Hu,&nbsp;Dongliang Ji,&nbsp;Xiaowei Feng,&nbsp;Liang Ge","doi":"10.1002/jctb.7784","DOIUrl":"https://doi.org/10.1002/jctb.7784","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This study investigates the effectiveness of electrokinetic remediation (EKR) with an intermittent power supply on soil contaminated with varying concentrations of chromium (Cr). Two soil types, designated as Soil A and Soil B, were analyzed to assess the impact of different remediation strategies.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Soil A, characterized by lower total Cr levels (1137 mg/kg), exhibited Cr (VI) removal rates exceeding 85%, peaking at 90.79% during the EK1 treatment (20 h on/4 h off). In contrast, Soil B, with significantly higher total Cr concentrations (6639 mg/kg), demonstrated a maximum Cr (VI) removal rate of approximately 80%. The study evaluated the influence of current, soil pH, and the three-dimensional distribution of total Cr, Cr (VI), and Cr (III). Energy consumption increased with longer power-off durations, while Soil B benefited from reduced energy usage and achieved nearly 10% higher Cr (VI) removal efficiency under specific conditions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The findings demonstrate that EKR with intermittent power supply is an effective and energy-efficient approach for remediating Cr-contaminated soils, particularly when tailored to the specific characteristics of the contaminated soil types. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"416-427"},"PeriodicalIF":2.8,"publicationDate":"2024-11-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117896","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":"Antibacterial performance of Co–Zn ferrite nanoparticles under visible light irradiation","authors":"Alicia G. Gubieda,&nbsp;Ana Abad-Díaz-de-Cerio,&nbsp;Ana García-Prieto,&nbsp;M. Luisa Fdez-Gubieda,&nbsp;Laura Cervera-Gabalda,&nbsp;Eduardo Ordoqui-Huesa,&nbsp;Alfonso Cornejo,&nbsp;Cristina Gómez-Polo","doi":"10.1002/jctb.7785","DOIUrl":"https://doi.org/10.1002/jctb.7785","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>To address water scarcity and promote sustainable resource management, more efficient and cost-effective water treatment solutions are necessary. Particularly, pathogens in drinking water are a topic of growing concern. One promising technology is the use of photocatalytic nanoparticles activated by visible light as antibacterial agents. This study focuses on the characterization and antibacterial properties of Co–Zn ferrite nanocatalysts, tested against <i>Escherichia coli</i>.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The Co_<i>x</i>Zn_1−<i>x</i>Fe₂O₄ (<i>x</i> = 0, 0.1, 0.4 and 0.6) ferrites were synthesized by the co-precipitation method. Structural, morphological and optical analyses confirmed that these nanoparticles have a cubic spinel structure, with sizes of around 10 nm, and band gap energies suitable for visible light activation (1.4–1.7 eV). The antibacterial efficacy of the nanoparticles against <i>E. coli</i> was tested and compared with their photocatalytic performance employing phenol as organic pollutant model (highest phenol degradation for <i>x</i> = 0.6). Specifically, the antibacterial capacity of these nanoparticles was evaluated by comparing the ability of bacteria to grow after being incubated with the nanoparticles under visible light and in the dark. It was found that nanoparticles with lower cobalt content (<i>x</i> = 0 and 0.1) significantly reduced bacterial culturability under visible light. Transmission Electron Microscopy analysis revealed that nanoparticles with cobalt content caused bacteria to secrete biofilm, potentially offering some protection against the nanoparticles.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>ZnFe₂O₄ nanoparticles show the highest antibacterial effect amongst those tested. This is attributed to the combined action of Zn²⁺ ion release and the photocatalytic effect under visible light. Furthermore, Zn might inhibit protective biofilm secretion, leading to higher antibacterial effects. © 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 2","pages":"428-437"},"PeriodicalIF":2.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7785","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117466","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":"Innovative preparation of multi-dentate Schiff base adsorbent for the adsorption of silver and its application on nano silver particles preparation from liquid photographic wastes","authors":"Safwat A. Mahmoud,&nbsp;Bahig M. Atia,&nbsp;Lamiaa Galal Amin,&nbsp;Mohamed Abdalla","doi":"10.1002/jctb.7787","DOIUrl":"https://doi.org/10.1002/jctb.7787","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>A novel silver adsorbent, (2Z,2′ E)-2,2′-((1,10-phenanthroline-2,9-diyl)bis(methaneylylidene))bis(N-phenylhydrazine-1-carboxamide) (PHMC), was synthesized for efficient Ag⁺ adsorption. PHMC was prepared by refluxing 1,10-phenanthroline-2,9-dicarboxaldehyde with N-phenylhydrazinecarboxamide at 120 °C. The structural and morphological properties of PHMC were characterized using various analytical techniques including FTIR, SEM, BET surface area analysis, ¹³CNMR, ¹HNMR, and GC–MS, to confirm the formation of PHMC adsorbent.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results demonstrated that PHMC possesses an exceptional silver sorption capacity of 440.67 mg g⁻¹ in aqueous solutions. Additionally, PHMC exhibited excellent reusability, with effective desorption of Ag(I) using a 1 M thiourea solution, enabling adsorbent regeneration. The adsorption of Ag⁺ onto PHMC was well described by Langmuir and D-R isotherms, as well as pseudo-second order and intraparticle diffusion (IPD) kinetic models. PHMC showed remarkable selectivity for silver, even in the presence of competing ions, and demonstrated significant stability, retaining over 95% of its initial capacity after four regeneration cycles and more than 80% after seven cycles. Thermodynamic investigations revealed that the sorption process was endothermic.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>PHMC proved to be a highly effective adsorbent for silver removal, with superior reusability compared to other materials. Optimal adsorption conditions were established for the removal of silver from liquid photographic waste. The recovered silver nitrate was successfully used to synthesize Ag nanoparticles using trisodium citrate (TSC) as a reducing agent, and the resulting nanoparticles were characterized using various analytical techniques to confirm the formation of silver nanoparticles. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"448-465"},"PeriodicalIF":2.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117467","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":"A recyclable polydopamine-functionalized Fe3O4/PDA-Fe3+ catalyst for the activation of peroxymonosulfate toward enhanced degradation of tetracycline","authors":"Xinde Jiang,&nbsp;Guixian Jiang,&nbsp;Guiqing Gao,&nbsp;Shengqin Xiong,&nbsp;Xian Li,&nbsp;Zhanmeng Liu","doi":"10.1002/jctb.7786","DOIUrl":"https://doi.org/10.1002/jctb.7786","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The increasing usage of tetracycline in antiviral therapy has caused severe aqueous water contamination, and advanced oxidation processes based on sulfate radicals have been recognized as an effective technique for degrading this antibiotic into harmless small molecules.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Herein, a strategy based on dopamine self-polymerization was utilized to synthesize the magnetite/polydopamine-ferric ion (Fe₃O₄/PDA-Fe³⁺) catalyst with excellent magnetism and abundant surface functional groups. This catalyst exhibited high performance in activation of permonosulfate for tetracycline degradation. The surface properties and chemical composition of this catalyst were characterized by scanning electron microscopy, X-ray diffraction, vibrating sample magnetometer, Fourier transform infrared and X-ray photon spectroscopy, which indicated that Fe₃O₄/PDA-Fe³⁺ could active permonosulfate to generate strong oxidizing free radicals for catalytic degradation of tetracycline. Beside its excellent catalytic activity, Fe₃O₄/PDA-Fe³⁺ also exhibited superior structural stability and reusability, and this catalyst could be simply recycled from solution using an external magnet. Additional quenching experiments and chemical environment analysis confirmed that hydroxyl, sulfate and superoxide anion radicals, singlet oxygen and surface-adsorbed oxygen contributed significantly to degradation of tetracycline.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This work proved that dopamine self-polymerization strategy could be used as an effective route to produce highly active and structurally sturdy catalysts for the degradation of organic pollutant. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 2","pages":"438-447"},"PeriodicalIF":2.8,"publicationDate":"2024-11-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143117465","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}