Journal of chemical technology and biotechnology最新文献

{"title":"Performance evaluation of sodium percarbonate-activated peroxymonosulfate on enhancing waste activated sludge anaerobic fermentation performance","authors":"Baodan Jin,&nbsp;Yusheng Jia,&nbsp;Jiacheng Wang,&nbsp;Baogui Wang,&nbsp;JingJing Du,&nbsp;Lan Wang,&nbsp;Chuang Ma,&nbsp;Jiantao Ji","doi":"10.1002/jctb.70236","DOIUrl":"https://doi.org/10.1002/jctb.70236","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>To address the limited resource recovery efficiency of waste activated sludge (WAS) under single advanced oxidation processes, this study developed a combined percarbonate (SPC)-activated peroxymonosulfate (PMS) system to enhance anaerobic fermentation performance, evaluate its applicability, and investigate its underlying mechanisms.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Results showed that the SPC/PMS system significantly improved the hydrolytic acidification performance, yielding maximum protein, polysaccharide, and short-chain fatty acids (SCFAs) concentrations of 307.66, 174.75, and 1189.15 mg COD/L, respectively. The enhancement of hydrolytic acidification performance is closely associated with improved sludge disintegration under anaerobic conditions and increased release of soluble organic substrates, thereby promoting the subsequent fermentation process. Analysis of key enzyme activities indicated that SPC-activated PMS significantly enhanced the activities of several key hydrolytic and acidogenic enzymes, including protease, α-glucosidase, alkaline phosphatase, acetate kinase, and butyrate kinase, thereby accelerating the conversion of organic matter. Microbial community analysis revealed that SPC/PMS selectively enriched SCFAs-producing bacteria, particularly <i>Firmicutes</i> and <i>Actinobacteriota</i>, while also increasing the relative abundance of sulfate-reducing bacteria (<i>Desulfobacterota</i>). These microbial shifts were consistent with improved hydrolytic-acidogenic performance and altered substrate utilization patterns.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Overall, the SPC-activated PMS system effectively enhances WAS anaerobic fermentation performance and SCFAs production, demonstrating its potential as a promising pretreatment strategy for sludge resource recovery. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2255-2267"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149145836","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":"Biocatalytic solutions to aquatic toxic pollutant degradation – emerging role of fungal laccases: a review","authors":"Sabeela Beevi Ummalyma,&nbsp;Bhuvanendran Revamma Sreelekshmy","doi":"10.1002/jctb.70227","DOIUrl":"https://doi.org/10.1002/jctb.70227","url":null,"abstract":"<p>The discharge of various industrial effluents into aquatic water bodies enriched with toxic emerging pollutants and their accumulation in the environment have recently become major concerns. These emerging pollutants show toxicity and carcinogenicity even at trace concentrations, seriously damaging the aquatic ecosystem, environment, and human health. Several research studies are ongoing worldwide to sustainably mitigate these hazardous pollutants. Laccases are potential green biocatalysts for the degradation of these toxic pollutants compared to physical and chemical treatment processes. Laccases are multi-copper oxidoreductases that have the potential to carry out oxidation of one electron across a wide spectrum of substrates and different pollutants. Laccases have recently received attention for the degradation of pollutants such as pharmaceutically active compounds, industrial dyes, personal care products, phenolic, aromatic, xenobiotic chemicals, and pesticides. In this review, we highlight the potential of laccase enzymes for the degradation of various emerging pollutants, the industrial production of laccases and their immobilization technology, various methods adopted for the degradation, and their mechanism for restoring the ecosystem. Finally, research gaps that could pave the way for future studies on a sustainable, pollution-free environment are discussed. This article provides researchers with insight into the potential of laccase-mediated pollutant degradation processes in aquatic environments, contributing to a sustainable ecosystem. © 2026 Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2208-2227"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146515","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 and recovery of glucose oxidase by adsorption using a macroreticular strong base anion exchange resin","authors":"Ruey-Shin Juang,&nbsp;Chia-I Juang,&nbsp;Thi Thu Thao Hoang","doi":"10.1002/jctb.70244","DOIUrl":"https://doi.org/10.1002/jctb.70244","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The commercially available glucose oxidase (GOx) is mainly produced by <i>Aspergillus niger</i>. An efficient and economic recovery technique is practically desired. In this study, various Amberlite™ anion exchange resins were used to separate GOx from buffer solution by adsorption. The obtained optimal pH of 6.8, higher than the isoelectric point of GOx (4.2), indicated the predominant adsorption mechanism of electrostatic interactions between GOx and the resins.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The adsorption isotherms of GOx on strongly basic IRA-900 resins at different concentrations of inert salts KCl and NaCl (0.01–0.5 M) and different temperatures (15–35 °C) were measured. All isotherms could be described by the Langmuir equation. Under the conditions studied, a maximum adsorption capacity of 732.8 mg of GOx was obtained per gram of the IRA-900 resin at 25 °C. Thermodynamic analysis revealed that the current adsorption of GOx was spontaneous with a positive enthalpy change (20.8 kJ/mol) and entropy change (182.5–191.7 J/(mol K)). Increasing the concentration of phosphate buffer eluant and bringing its pH closer to the isoelectric point of GOx gradually increased the desorption efficiency. Also, increasing KCl concentration in the eluant improved the desorption of GOx from the loaded IRA-900 resins; for example, the desorption approached 100% at 15°C when the eluant comprised 1.0 M of KCl.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study presents an efficient method to separate and recover GOx from aqueous solution. The screened resin is the macroreticular strong base IRA-900 with a particle size of 0.074–0.250 mm. Moreover, factors affecting adsorption and desorption of GOx, including pH and concentration of the buffer solution, concentration of inert salt, and temperature, are systematically specified. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2394-2404"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146633","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":"Combined treatment of paper industry wastewater by Fenton and ultra/nanofiltration membrane processes: comparison of membrane types","authors":"Sude Simay Dirilce,&nbsp;Deniz İzlen Çifçi,&nbsp;Ali Rıza Dinçer","doi":"10.1002/jctb.70243","DOIUrl":"https://doi.org/10.1002/jctb.70243","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The paper industry wastewater treatment using Fenton oxidation, ultrafiltration, and nanofiltration membrane processes was researched in this study. The different Fe²⁺ and H₂O₂ concentrations, pH values, and oxidation times were evaluated on wastewater treatment, and the oxidation kinetics were determined in the Fenton process. The different membranes (UC30 and UC100) during the ultrafiltration process, and the different membranes (NP30 and NP10) during the nanofiltration process were used at various pH values (3, 5, and 7).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>pH 3, 3000 mg L⁻¹ Fe²⁺, 8000 mg L⁻¹ H₂O₂ and 1 h were determined as the optimum operating conditions for the Fenton oxidation process. UC100 membrane for ultrafiltration and UC30 membrane for nanofiltration provided the highest treatment efficiencies, while treatment performance in both membrane systems improved under alkaline conditions (pH 11). As a result, overall removal of COD, TOC, and color was achieved as 97.9%, 96.1%, and 99.9% by the combination of the Fenton–ultrafiltration–nanofiltration system.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>These findings demonstrate that the proposed sequential treatment system enables advanced treatment of paper industry wastewater and provides a strong potential for wastewater reuse applications. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2368-2376"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146297","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":"Bioelectrochemical single reactor for reductive and oxidative removal of trichloroethylene from contaminated groundwater","authors":"Maria Presutti,&nbsp;Geremia Sassetto,&nbsp;Angela Marchetti,&nbsp;Giulia Simonetti,&nbsp;Marco Petrangeli Papini,&nbsp;Marco Zeppilli","doi":"10.1002/jctb.70147","DOIUrl":"https://doi.org/10.1002/jctb.70147","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Chlorinated aliphatic hydrocarbons such as trichloroethylene (TCE) are persistent groundwater contaminants due to improper disposal and low biodegradability. This work presents an innovative bioelectrochemical system for the integrated reductive/oxidative removal of TCE from contaminated water, implemented in a single tubular reactor. Unlike previous approaches relying on sequential reactor configurations, this study optimizes a three-electrode setup that enables both anaerobic and aerobic dechlorination processes to occur simultaneously within the same unit. The system features a mixed metal oxide (MMO) anode that facilitates oxygen evolution and supports oxidative degradation, and a graphite cathode for TCE reduction under anaerobic conditions. The reactor's configuration promotes the coexistence of both anaerobic and aerobic microbial communities, enabling complete dechlorination of TCE and minimization of toxic by-products</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>After characterizing the system from a fluid-dynamic point of view, continuous-flow galvanostatic runs at +15, +30, and +20 mA achieved removal efficiencies above 97%. By-product profiles confirmed the progression toward full mineralization. The most effective performance was obtained at +30 mA, with a removal rate of 38.6 μmol/L d⁻¹. Coulombic efficiency and energy consumption were also evaluated, highlighting the feasibility of low-energy operation.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This single-reactor strategy represents a significant advancement in the design of compact and efficient systems for <i>in situ</i> groundwater remediation, reducing operational complexity while enhancing treatment performance. © 2026 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2268-2275"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70147","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146003","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":"Optimizing feather hydrolysate via machine learning for microbial recycling of waste concrete fines","authors":"Henrietta Ottová,&nbsp;Barbora Malíková,&nbsp;Václav Nežerka,&nbsp;Petr Holeček,&nbsp;Dana Koňáková,&nbsp;Hana Stiborová","doi":"10.1002/jctb.70172","DOIUrl":"https://doi.org/10.1002/jctb.70172","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The concrete industry faces significant challenges from CO₂ emissions and the disposal of waste concrete fines (WCF). Microbially induced calcite precipitation (MICP) can bind WCF into bioconcrete, but the high cost of commercial culture media hinders its application. This study aimed to develop a low-cost, sustainable medium from waste chicken feather hydrolysate, optimized via machine learning for two MICP bacteria, <i>Sporosarcina pasteurii</i> DSM 33 and <i>Sutcliffiella cohnii</i> DSM 6307.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The model successfully optimized the feather hydrolysis process based on bacterial growth by exploring parameters such as hydrolysis duration, temperature, and the concentration of feathers and hydroxide. The costs of the optimized hydrolysate were reduced by 80% compared to the commercial medium. The resulting bioconcrete samples demonstrated properties comparable to or superior to commercial media controls, including higher mechanical resistance and increased calcite content. The waste-derived medium also promoted a beneficial shift in pore structure. Additionally, we found that mechanical stiffness is influenced not only by the CaCO₃ content, but also by its spatial distribution and the formation of crystal bridging, which proved to be critical.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Optimized feather hydrolysate is a viable substitute for commercial media, providing a sustainable, circular-economy solution by valorising both poultry and concrete waste streams. © 2026 The Author(s). <i>Journal of Chemical Technology and Biotechnology</i> published by John Wiley &amp; Sons Ltd on behalf of Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2310-2326"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.70172","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146211","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":"Nanotechnology based electrochemical estimation of kaempferol: the challenges, future perspectives and artificial intelligence","authors":"Imran Ali,&nbsp;Ersin Demir,&nbsp;Mustafa Kocak,&nbsp;Havva Oztemur,&nbsp;Marcello Locatelli,&nbsp;Musa A. Said,&nbsp;Mouslim Messali","doi":"10.1002/jctb.70231","DOIUrl":"https://doi.org/10.1002/jctb.70231","url":null,"abstract":"<p>This article describes electroanalytical methods developed over the last 25 years for kaempferol (an important molecule) detection, with a main emphasis on voltammetric techniques like cyclic voltammetry, differential pulse voltammetry, and square wave voltammetry. Extensive research describes how electrode surface alterations (using metal nanoparticles, carbon nanomaterials, metal–organic frameworks, and conductive polymers) enhance electron transfer kinetics and analytical performance. These nanostructured devices enabled low-level detection limits, i.e., nano- to picomolar concentrations, even in complex biological and environmental matrices, foods, and pharmaceuticals. Despite these improvements, challenges like electrode fouling, matrix interference, overlapping oxidation signals from structurally similar flavonoids, and low portability continue to be barriers to real-world sample applications. Furthermore, this review highlights emergent solutions, comprising miniaturized and paper-based devices, molecularly imprinted sensors, and smartphone-integrated platforms. Special attention is given to the rising role of artificial intelligence and machine learning in electrochemical sensing, where chemometric and deep-learning methods advance the signal processing, solve overlapping peaks, decrease human-induced errors, and permit multi-analyte analyses. Briefly, this review proves that the combination of nanotechnology and artificial intelligence is capable of transforming the electrochemical kaempferol determination from laboratory methods to portable, robust, and intelligent sensing systems for clinical diagnosis, food safety, and pharmaceutical analyses. © 2026 Society of Chemical Industry (SCI).</p>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2193-2207"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146565","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 two-stage modified PES ultrafiltration system for enhanced treatment of high-strength seasoning wastewater: organic removal and process optimization","authors":"Kiattinatapon Juengchareonpoon,&nbsp;Porntip Dechpichai,&nbsp;Songsirin Ruengvisesh,&nbsp;Waritha Jantaporn","doi":"10.1002/jctb.70237","DOIUrl":"https://doi.org/10.1002/jctb.70237","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The treatment of high-strength industrial wastewater containing high organic load and salinity remains a significant challenge for conventional processes. This study presents an integrated two-stage ultrafiltration (UF) system based on modified polyethersulfone (PES) membranes specifically developed for seasoning wastewater treatment to simultaneously address organic pollutant reduction, biofouling, and partial desalination.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>In the first stage, the membrane surface was modified with dopamine (DA), polyethyleneimine (PEI), and silver nanoparticles (AgNPs). An optimal 1:1 DA:PEI ratio yielded a flux recovery ratio of 88%, while the incorporation of AgNPs provided distinct antibacterial activity against Shigella flexneri. Additionally, artificial neural networks (ANNs) accurately modeled flux decline with a high predictive accuracy (R2 = 0.964). The second stage, utilizing a glutaraldehyde-crosslinked PES membrane, achieved 53.12% Ca²⁺ rejection compared to only 6.53% for Na⁺, which was primarily driven by Donnan exclusion. Overall, this integrated two-stage system achieved 92.27% chemical oxygen demand (COD) removal.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The proposed integrated two-stage modified UF system demonstrates effective fouling mitigation, robust antibacterial functionality, and successful selective multivalent ion removal. These findings highlight the system's strong potential as an energy-efficient treatment or selective pretreatment process for high-strength, high-salinity industrial effluents. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2276-2292"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146161","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":"Direct ammonium sulfate production from untreated industrial phosphogypsum under mild conditions: process evaluation","authors":"Ertuğrul Çelik,&nbsp;Cemre Avşar Kaya,&nbsp;Suna Ertunç","doi":"10.1002/jctb.70247","DOIUrl":"https://doi.org/10.1002/jctb.70247","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Industrial phosphogypsum valorization typically requires energy-intensive pretreatments. This study provides a baseline approach by evaluating direct, single-step conversion of raw, untreated phosphogypsum into ammonium sulfate and calcium carbonate under mild laboratory conditions (55 °C, 3 h, atmospheric pressure, 1:4 solid-to-liquid ratio) using 12–14 wt% NH₄OH solutions.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Untreated phosphogypsum demonstrated sufficient intrinsic reactivity to produce crystalline (NH₄)₂SO₄ with a high purity of 96–98.29%, containing 20.31–20.54 wt% nitrogen and 23.03–23.54 wt% sulfur. The highest reaction efficiency and product purity were achieved using a 13 wt% NH₄OH solution. Due to heterogeneous reaction constraints and mass transfer resistance, the overall conversion efficiency remained moderate at 23.13–29.31%, yielding 1.53–1.93 g of product against a theoretical yield of 6.61 g.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The consistent formation of high-purity (NH₄)₂SO₄ directly from raw, inactivated phosphogypsum validates the technical viability of this simplified waste-to-resource framework. While surface-related and thermodynamic limitations present clear efficiency boundaries that require future process optimization, the elimination of energy-intensive pretreatments represents a significant step toward cost-effective industrial sustainability. This study lays a solid foundation for upcoming pilot-scale validations, comprehensive mass–energy balances, and integrated CO₂ sequestration strategies. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2405-2419"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146864","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":"Synergistic Cu–Fe interactions in CuO-Fe3O4 catalysts for high-activity Fenton-like degradation of oxytetracycline in water","authors":"Ahmad Zuhairi Abdullah,&nbsp;Muna Awadh Alrebaki,&nbsp;Muneer M. Ba-Abbad","doi":"10.1002/jctb.70241","DOIUrl":"https://doi.org/10.1002/jctb.70241","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The synthesis, characterization and performance evaluation of bimetallic CuO-Fe₃O₄ catalysts in heterogeneous Fenton-like degradation of oxytetracycline (OTC) in water was attempted. Influences of different catalyst compositions on the reaction behaviors were specifically elucidated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>By varying the Cu/Fe molar ratio, CuO-Fe₃O₄ (2/5) was identified as the most effective catalyst, achieving near complete OTC and COD removal within 60 min. Its superior activity resulted from an optimal Cu<span></span>Fe balance that enhanced metal dispersion, interaction, and •OH radical generation. The catalyst exhibited high surface area, narrow pore distribution, and minimal Fe leaching (~0.28 mg L⁻¹), maintaining stable performance over five reuse cycles with negligible structural degradation. Calcination at 400 °C further improved activity, offering the best balance of surface reactivity, adsorption, and stability, while under- or over-calcination (350 °C or 600 °C) reduced efficiency due to particle agglomeration leading to limited •OH production. Reaction parameters such as catalyst dosage, H₂O₂ concentration, pH, and OTC loading significantly affected degradation. Optimum conditions were pH 3.0, 0.5 g L⁻¹ catalyst, and 60 mg L⁻¹ H₂O₂. Higher OTC concentrations or excess catalyst reduced efficiency through saturation or radical scavenging.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The enhanced catalytic activity arose from synergistic Cu<span></span>Fe interactions that promoted •OH generation rather than surface area alone. Owing to its high activity, stability, low metal leaching, and reusability, the CuO-Fe₃O₄ (2/5) catalyst shows strong potential for large-scale water treatment and degradation of organic pollutants under acidic conditions. © 2026 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"101 11","pages":"2353-2367"},"PeriodicalIF":2.7,"publicationDate":"2026-10-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"149146485","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}