Journal of chemical technology and biotechnology最新文献

{"title":"Electrochemical synthesis of NaClO solutions on Ti/Pt electrodes in current reverse mode","authors":"Dmitry Girenko,&nbsp;Bohdan Murashevych,&nbsp;Pavlo Demchenko,&nbsp;Alexander Velichenko","doi":"10.1002/jctb.7741","DOIUrl":"10.1002/jctb.7741","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The synthesis of sodium hypochlorite (NaClO) by classical electrolysis of NaCl solutions on a Ti/Pt anode is characterized by parallel formation of undesirable sodium chlorate (NaClO₃) impurities. Oxidation of hypochlorite to chlorate with high current efficiency (CE) is realized on the oxidized, passivated Pt surface. On a Pt surface reduced by cathodic polarization, NaClO synthesis can be realized with the CE close to 90% almost without chlorate accumulation. Long-term electrolysis leads to passivation of the Pt surface.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Electrolysis while periodically changing the polarity of the electrodes (current reverse mode) increases the time the Pt surface remains in the activated state. Carrying out electrolysis in this way makes it possible to increase CE(NaClO) 1.5–2.0-fold while simultaneously reducing CE(NaClO₃) (sodium chlorate) by ≤10-fold. This study additionally determined the optimal parameters of reverse electrolysis, examined the effect of changing polarity on the state of the Ti/Pt electrode surface and studied the kinetic patterns of active platinum coating dissolution.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The optimal conditions for electrolysis in current reverse mode are current densities of 5–10 mA cm⁻² with the period of polarity change close to 30 s. The result of such a process is an isotonic solution containing 500 mg L⁻¹ NaClO with an admixture of &lt;10 mg L⁻¹ NaClO₃ and 0.1 mg L⁻¹ Pt in the form of soluble chloride complexes. The rate of Pt accumulation is determined by the frequency of polarity change. The resulting solutions have sufficiently high purity for use in medicine and aerosol air disinfection. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2608-2616"},"PeriodicalIF":2.8,"publicationDate":"2024-09-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192120","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":"Phycoremediation: a path towards heavy metal bioremediation from wastewater","authors":"Naila Amel Agoun,&nbsp;Fatma Gizem Avci","doi":"10.1002/jctb.7745","DOIUrl":"10.1002/jctb.7745","url":null,"abstract":"<p>Heavy metals (HMs) have emerged as a significant and complex water pollution problem globally. These pollutants are particularly concerning due to their teratogenic, mutagenic, poisonous and carcinogenic properties, as well as their non-biodegradability. Traditional removal techniques often fall short in addressing these issues, leading to a search for more effective solutions. One promising alternative is the phycoremediation process, which employs microalgae to remove HMs from wastewater. This method is not only cost-effective but also environmentally friendly, offering the additional benefits of nutrient recovery from polluted water and conversion into value-added products. This review delves into the capabilities of microalgae in remediating HM-polluted water, examining the various factors and methods that affect the process. Key improvements that can enhance the efficiency of phycoremediation include immobilizing microalgae to increase their stability and longevity, utilizing binary cultures to harness synergistic effects and implementing cellular and genetic modifications to boost HM uptake and resilience. Moreover, the integration of algorithms and artificial intelligence can optimize phycoremediation processes by predicting and controlling environmental conditions, enhancing the precision and effectiveness of HM removal. The combination of these advanced strategies holds promise for overcoming the limitations of conventional methods, positioning phycoremediation as a viable solution for mitigating HM contamination in water bodies. © 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>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"100 1","pages":"13-23"},"PeriodicalIF":2.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7745","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192122","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":"Synthesis of levulinic acid from tobacco stalk via steam explosion and oxidation–hydrolysis route","authors":"Hui Wang,&nbsp;Zhihao Chen,&nbsp;Zhongcheng Guo,&nbsp;Yangyang Ma,&nbsp;Xiaomei Yang,&nbsp;Lipeng Zhou,&nbsp;Chen Chen,&nbsp;Fayi Wang","doi":"10.1002/jctb.7746","DOIUrl":"10.1002/jctb.7746","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Tobacco stalk, the main waste from tobacco planting, was used as raw material to produce levulinic acid, one of the most important platform chemicals. It was reported that steam explosion was an efficient method to treat lignocellulose to hydrolyze the hemicellulose component. Oxidation treatment combined with catalysis of Al₂(SO₄)₃ proved to be efficient for the conversion of cellulose to levulinic acid in our recent report. Here, tobacco stalk was first treated by steam explosion, and then the solid residue was oxidized and converted to levulinic acid in the presence of Al₂(SO₄)₃.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>A xylo-oligosaccharide yield of 6.6 g 100 g⁻¹ was obtained from tobacco stalk via steam explosion. 15.4 g 100 g⁻¹ (39.6 mol%) yield of levulinic acid was obtained from oxidized tobacco stalk in water at 180 °C in 5 h using Al₂(SO₄)₃ as a catalyst. As high as 20.8 g 100 g⁻¹ (53.5 mol%) yield of levulinic acid can be obtained using NaCl as a co-catalyst.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Steam explosion was efficient for the depolymerization of the hemicellulose component of tobacco stalk to xylo-oligosaccharide. A simple salt of Al₂(SO₄)₃ showed good catalytic activity for conversion of oxidized tobacco stalk to levulinic acid. Nicotine in tobacco stalk promoted the formation of lactic acid. Thus, the yield of levulinic acid decreased in the presence of nicotine. NaCl enhanced the catalytic performance of Al₂(SO₄)₃. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2648-2654"},"PeriodicalIF":2.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192121","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 naphthalene vapor biofiltration: performance and microbial community dynamics with diverse inoculums","authors":"Jessica San Martín-Davison,&nbsp;Raquel Lebrero,&nbsp;Christian Vergara-Ojeda,&nbsp;Felipe Scott,&nbsp;Cesar Huiliñir,&nbsp;Alberto Vergara-Fernández","doi":"10.1002/jctb.7744","DOIUrl":"10.1002/jctb.7744","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>Naphthalene is a polycyclic aromatic hydrocarbon, highly dangerous for human health. It is produced as a byproduct of incomplete combustion of organic material and is frequently present in the air. Biofilters offer an effective alternative for its treatment. The aim of this work was to study the treatment of naphthalene vapors through biofiltration using two biofilters: one inoculated with a consortium composed of <i>Fusarium solani</i> and <i>Rhodococcus erythropolis</i> (BF1), and the other inoculated with a consortium of microbial isolates obtained from a previous biofilter eliminating naphthalene vapors.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The results demonstrate that inoculating a biofilter with a reconstructed consortium of microbial isolates from a naphthalene vapor-eliminating biofilter allowed a reduction of the startup time from 35 to 5 days, while maintaining a consistent removal capacity (6 g m⁻³ h⁻¹, equivalent to 80% removal efficiency). It was also observed that the biofilter inoculated with the reconstructed consortium exhibited comparable robustness to a biofilter previously operated for 4 months with naphthalene, with a maximum removal capacity of 14 g m⁻³ h⁻¹ for a naphthalene inlet load of 17 g m⁻³ h⁻¹. The study of microbial communities indicates an increase in the bacterial variability, while fungal variability remains low, with <i>Fusarium solani</i> being predominant at 97%.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusions</h3>\u0000 \u0000 <p>Results obtained during the startup of both biofilters and by challenging biofilters to increasing naphthalene concentrations or decreasing empty bed residence time showed that startup time can be reduced sevenfold by selecting the microbial consortium. An equivalent performance, in the long run, was achieved for both biofilters. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2639-2647"},"PeriodicalIF":2.8,"publicationDate":"2024-09-03","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192123","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":"Synthesis of rGO/CuBi2O4 nanocomposite as an effective photocatalyst in the reduction of nitroaromatic compounds to corresponding amines under visible light","authors":"Elham Hosseinian,&nbsp;Ali Oji Moghanlou,&nbsp;Farshid Salimi Nanekaran,&nbsp;Behnam Khanizadeh,&nbsp;Nayer Mohammadian Tarighi","doi":"10.1002/jctb.7735","DOIUrl":"10.1002/jctb.7735","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Chemical pollutants, such as nitroaromatic compounds, have been a significant challenge in recent decades of human societies as they contribute to environmental pollution and pose serious health risks due to their high toxicity. One promising and green method to address this issue is the photocatalytic reduction of nitroaromatic compounds to their corresponding amino aromatic compounds. In this study, an rGO/CuBi₂O₄ nanocomposite was synthesized using the hydrothermal method, involving the simultaneous reduction of graphene oxide and the coupling of CuBi₂O₄ nanoparticles in its layers. The resulting heterogeneous structure was characterized using various techniques including FTIR, Raman, XPS, XRD, FESEM, TEM, EDAX, UV–Vis DRS, BET, PL spectroscopy, and EIS. Subsequently, the photocatalytic efficiency of the nanocomposite in reducing nitroaromatic compounds to the corresponding aromatic amines under visible light was evaluated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The results indicated that graphene oxide was effectively reduced and coupled with CuBi₂O₄ nanoparticles in the reduced graphene oxide sheets. The rGO/CuBi₂O₄ heterogeneous nanocomposite successfully reduced nitroaromatic compounds to the corresponding aromatic amines under visible light. Hydrazine monohydrate was used to supply the necessary hydrogen for the reaction.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>This study confirmed the high photocatalytic activity of the rGO/CuBi₂O₄ heterogeneous nanocomposite. Our nanocomposite was more effective than others, reported in similar studies, at reducing nitroaromatic compounds to the corresponding amino aromatic compounds. Additionally, it demonstrated high recycling and reuse properties, as there was no significant change in reaction conversion percentage and nanocomposite amount after 16 reuses. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2464-2481"},"PeriodicalIF":2.8,"publicationDate":"2024-08-29","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192125","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":"Paracetamol sensing with a flexible graphene paper electrode modified with MnCo2O4","authors":"Murad Shafiyev,&nbsp;Elif Erçarıkcı,&nbsp;Kader Dağcı Kıranşan,&nbsp;Ezgi Topçu","doi":"10.1002/jctb.7739","DOIUrl":"10.1002/jctb.7739","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The design of new-generation flexible sensors for medical applications has gained considerable interest in the research community in recent past years. Herein, a free-standing flexible electrode was developed for the electrochemical determination of Paracetamol (PC). This graphene-based paper electrode was prepared using graphene and MnCo₂O₄ dispersion with a mold-casting method followed by chemical reduction. The morphology and structure of our flexible paper electrode (MnCo₂O₄/GP) were characterized by scanning electron microscopy, energy-dispersive, X-ray diffraction, X-ray photoelectron, and Raman spectroscopy.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The as-prepared flexible MnCo₂O₄/GP showed outstanding sensing performance for PC, as compared to GP, due to the excellent electrochemical properties of MnCo₂O₄. The proposed sensor exhibited a wide linear range of 4.64–1000 μM for electrochemical determination of PC with a low detection limit of 1.39 μM. Furthermore, MnCo₂O₄/GP was successfully applied for PC syrup and tablets with good accuracy results.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSIONS</h3>\u0000 \u0000 <p>For the first time, the present study demonstrated the fabrication and utilization of MnCo₂O₄-modified graphene paper to develop a flexible and sensitive electrode for monitoring PC. © 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":"99 12","pages":"2582-2591"},"PeriodicalIF":2.8,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7739","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192126","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":"Engineered hybrid iron-cobalt metal oxide nanoparticles for effective adsorption of malachite green dye","authors":"Nasira Hussain,&nbsp;Shanza Shafaat,&nbsp;Ambreen Sarfraz,&nbsp;Muhammad Usman,&nbsp;Muhammad Saqib Khan,&nbsp;Asad Muhammad Khan,&nbsp;Rafaqat Ali Khan,&nbsp;Bilal Ahmad Zafar Amin,&nbsp;Muhammad Bilal,&nbsp;Ahson Jabbar Shaikh","doi":"10.1002/jctb.7737","DOIUrl":"10.1002/jctb.7737","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Hybrid iron and cobalt metal oxide nanoparticles are well known; however, are not optimized in terms of size and stability. We engineered these hybrid nanoparticles using the co-precipitation method and characterized them by various techniques, which are then used for the effective adsorption and removal of malachite green (MG) dye.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The ideal conditions for synthesis are determined to be 50:50 ratio of Fe₂O₃ and CoO, pH of 11, temperature range of 40 °C–60 °C, and reactant addition time of 20 min. These hybrid nanoadsorbents effectively eliminated MG dye from aqueous solutions. Factors such as initial MG dye concentration, pH of the medium, contact time, temperature, and nanoadsorbent dose were optimized for the MG removal to achieve a maximum removal efficiency of 96.9%. Non-linear fitting of data indicates that both Langmuir and Freundlich models provided the best fit, suggesting the presence of both monolayer and multilayer adsorption of MG on hybrid nanoparticles. The kinetics of MG dye removal are better controlled by the intraparticle diffusion (IPD) phenomenon. The adsorption of MG onto the hybrid nanoparticles was confirmed to be endothermic, with negative ΔG and positive ΔH values. The optimized synthetic conditions also positively impacted the hybrid nanoparticles which enhanced the adsorption and exhibited ferromagnetic behavior as compared to the superparamagnetic behavior reported in the literature, making them significantly important for dye removal applications.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>These findings demonstrate the potential of optimized hybrid nanoparticles as effective nanoadsorbents for dye removal applications, with implications for further applications in photocatalysis and sensing. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2553-2568"},"PeriodicalIF":2.8,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192156","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":"Rapid precipitation of vanadium from solution using melamine as precipitant with high efficiency","authors":"Bo Wang,&nbsp;Qiaowen Yang,&nbsp;Ting Li,&nbsp;Sifan Cui,&nbsp;Pengqiang Feng,&nbsp;Xuan Hou","doi":"10.1002/jctb.7738","DOIUrl":"10.1002/jctb.7738","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Selective catalytic reduction (SCR) can effectively remove NO_<i>x</i> from flue gas in a coal-fired power plant. As the core of SCR technology, the catalyst has a limited lifespan. The process of reducing acid leaching and roasting water leaching can efficiently extract vanadium and tungsten from spent SCR catalyst. For vanadium recovery in solution, the traditional vanadium precipitation process by NH₄Cl has the disadvantages of consuming high precipitant dosage and producing large amounts of waste water.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>This study focused on the vanadium precipitation process using a solution containing vanadium obtained from adopting some steps to handle the spent SCR catalyst. First, melamine was screened out as the vanadium precipitant. Then, the vanadium precipitation conditions were optimized as follows: solution pH value of 1.0, <i>n</i>(C₃H₆N₆)/<i>n</i>(V) = 0.8, 110 °C and 30 min. Under the best precipitation conditions, the vanadium precipitation efficiency of melamine can reach 99.32%. Finally, the mechanisms of vanadium precipitation by NH₄Cl and melamine were discussed, respectively.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The results showed that the vanadium precipitation process by NH₄Cl followed the chemical reactions between NH₄⁺ and vanadium ions, while the vanadium precipitation process by melamine followed the redox and complexation reactions which essentially belonged to the types of chemical adsorption. The vanadium precipitation product was roasted at 550 °C for 2 h to obtain the vanadium product. The main component of the vanadium product was V₂O₅, with a purity of 93.27 wt%. The total recovery efficiency of vanadium from spent SCR catalyst was 78.24%. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2569-2581"},"PeriodicalIF":2.8,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142224721","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":"Zinc-based metal–organic frameworks for encapsulation and sustained release of ciprofloxacin for excellent antibacterial activities","authors":"Abdul Rauf,&nbsp;Mohsin Javed,&nbsp;Muhammad Jahangir,&nbsp;Mehdi Hassan,&nbsp;Anam Tariq,&nbsp;Wajahat Ali,&nbsp;Ali Bahadur,&nbsp;Shahid Iqbal,&nbsp;Sajid Mahmood,&nbsp;Khalid M Alotaibi,&nbsp;Matar Alshalwi","doi":"10.1002/jctb.7736","DOIUrl":"10.1002/jctb.7736","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In terms of crystalline nanoporous materials, metal–organic frameworks (MOFs) are relatively new. They are self-assembling structures made of organic ligands that serve as linkers between metal centers and metal ions that function as coordination centers. Due to MOFs' high porosity, absence of nonaccessible bulk volume, vast surface areas and variety of pore sizes and topologies, drug delivery via them is becoming more and more common.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Zn-MOF and Zn-MOF@drug were produced using a solvothermal approach in this study and characterized using a variety of methods, including Fourier transform infrared spectroscopy, powder X-ray diffraction and scanning electron microscopy. Utilizing the zone of inhibition and minimum inhibitory concentration approaches, Zn-MOF and Zn-MOF@drug were evaluated for their antibacterial capability against <i>Escherichia coli</i> and <i>Bacillus subtilis</i>, two types of bacteria.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The antibacterial potential of Zn-MOF@drug was greater than that of the metal salt, commercially available ZnO, Zn-MOF and ligand alone. The mechanism of antibacterial activity of Zn-MOF@drug was also discussed. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 12","pages":"2545-2552"},"PeriodicalIF":2.8,"publicationDate":"2024-08-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192157","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":"Adsorption of vanadium using a new anionic Schiff Base adsorbent and its application to vanadium separation from boiler ash","authors":"Mohamed Abdalla","doi":"10.1002/jctb.7733","DOIUrl":"10.1002/jctb.7733","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> Background</h3>\u0000 \u0000 <p>This study reports the preparation of 2-hydroxy-3-(4-(((2-((2-(((<i>E</i>)-4-(2-hydroxy-3-(trimethylammonio)propoxy)-3-methoxybenzylidene)amino)ethyl)amino)ethyl)imino)methyl)-2-methoxyphenoxy)-<i>N</i>,<i>N</i>,<i>N</i>-trimethylpropan-1-aminium (HYM/QA). The adsorbent was employed to extract and concentrate vanadium from its solutions and boiler ash samples.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Results</h3>\u0000 \u0000 <p>The impact of initial dosage, pH, reaction time and temperature on the sorption behavior of V(V) was examined. Under optimal conditions (pH 5, 0.08 g dose, 45 min at room temperature), a sorption capacity of 392.25 mg g⁻¹ was achieved. The uptake of V(V) on HYM/QA was effectively reversed using 1 mol L⁻¹ NaOH, regenerating the material. After six cycles of sorption and elution, the sorption capability remained at 91.4% of its initial value. The efficiency and selectivity of HYM/QA toward V⁵⁺ ions were assessed using the separation factor parameter, revealing limited interference from heavy metals such as Mn²⁺, Cr³⁺, Pb²⁺, Si⁴⁺, Al³⁺, NO₃²⁻, HCO₃⁻ and Zn²⁺. The uptake process of HYM/QA for V(V) conformed to the Langmuir and Dubinin–Radushkevich isotherm models and the pseudo-second-order kinetic model. HYM/QA was characterized by infrared, Brunauer–Emmett–Teller surface area, ¹H NMR, ¹³C NMR and gas chromatography–mass spectrometry analyses, confirming successful preparation. Thermodynamic assessments suggested that the sorption process is endothermic, spontaneous and becoming more favorable with rising temperature.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> Conclusion</h3>\u0000 \u0000 <p>The optimized conditions were used to adsorb vanadium from boiler ash samples, and the obtained vanadium pentaoxide was analyzed and confirmed using various tools, demonstrating the material's effectiveness for vanadium extraction. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":"99 11","pages":"2434-2453"},"PeriodicalIF":2.8,"publicationDate":"2024-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142192161","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}