Journal of chemical technology and biotechnology最新文献

{"title":"Process development in Quality-by-Design paradigm for anti-solvent aided crystallization: impact of crystallization parameters on particle morphology and dissolution behaviour of Dexlansoprazole active pharmaceutical ingredient","authors":"Manu Garg,&nbsp;Anurag Singh Rathore","doi":"10.1002/jctb.7665","DOIUrl":"10.1002/jctb.7665","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>In this work, a process development study for the crystallization step of dexlansoprazole API has been demonstrated under the Quality-by-Design (QbD) paradigm. Dexlansoprazole (crystalline) samples prepared under different crystallization conditions of reactor temperature and addition time of anti-solvent were subjected to solid-state characterization with variety of analytical techniques, including X-ray powder diffraction (XRPD), differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), dynamic vapour sorption (DVS), scanning electron microscopy (SEM), particle size distribution (PSD) by laser diffraction and intrinsic dissolution rate (IDR).</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The crystalline samples were observed to have identical polymorphic phase integrity but differed in their physical characteristics. The particle size distribution and microscopy data collectively elucidated the particle growth kinetics and the extent of agglomeration could be correlated to crystallization conditions, namely reactor temperature and addition time of anti-solvent. The intrinsic dissolution rate of samples was in good agreement with the morphological properties.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>An empirical model has been proposed for intrinsic dissolution rate correlating with crystallization process parameters. In conclusion, it was possible to elucidate the impact of crystallization parameters on the solid-state behaviour of dexlansoprazole for development of appropriate pharmaceutical dosage forms. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141195293","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Effects of coating technique on the physicochemical properties and structure of MoS2-TiO2/PVDF-PES for membrane distillation application","authors":"Nurul Syazana Fuzil,&nbsp;Nur Hidayati Othman,&nbsp;Nur Hashimah Alias,&nbsp;Muhammad Shafiq Mat Shayuti,&nbsp;Munawar Zaman Shahruddin,&nbsp;Fauziah Marpani,&nbsp;Woei Jye Lau,&nbsp;Ahmad Fauzi Ismail,&nbsp;Mohd Hafiz Dzarfan Othman,&nbsp;Tutuk Djoko Kusworo,&nbsp;Sumaiya Zainal Abidin,&nbsp;Anwar Ul-Hamid,&nbsp;Norazah Abd Rahman","doi":"10.1002/jctb.7679","DOIUrl":"10.1002/jctb.7679","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Membrane distillation (MD) for desalination encounters significant hurdles as a result of pore wetting, leading to reduced permeate flux or deterioration in permeate quality over time. Therefore, membranes used in MD must be highly hydrophobic to prevent liquid from entering the pores and contaminating the permeate stream. In this study, a thin layer of MoS₂-TiO₂ composite was coated using poly (DOPA) as an adhesive to enhance attachment. Two coating methods, interlinking and layering, were compared to determine the most effective method for forming a thin hydrophobic coating layer onto PVDF-PES hollow fiber membrane.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Interestingly, this study revealed that increasing the number of dipping cycles led to higher flux, defying conventional expectations. This unexpected outcome is likely to have resulted from the thicker coatings creating a more hydrophobic surface, reducing water molecule adhesion and preventing wetting. Consequently, the membrane demonstrated enhanced flux despite its increased thickness. Among the membranes tested, the MoS₂-TiO₂/PVDF-PES membrane coated using the layering method exhibited the best performance, leading to a flux of 2.06 kg m⁻² h⁻¹ and 99.99% salt rejection. This superior performance can also be attributed to the membrane's hydrophobic properties, evident in its water contact angle (WCA) of 99°. By contrast, the interlinking method resulted in lower performance, with a permeate flux of 1.70 kg m⁻² h⁻¹ and 99.96% salt rejection, which is likely to have resulted from its lower WCA of 86°.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The findings from this study suggest that the coating method has the potential to greatly improve membrane distillation performance through wettability modification rather than altering membrane porosity. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141171407","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":"Iron ion catalyzed hydrogen peroxide pretreatment for bio-jet fuel production from straw biomass","authors":"Rui Zhu,&nbsp;Rui Zhang,&nbsp;Yuting He,&nbsp;Can Zhu,&nbsp;Yu Jiang,&nbsp;Yuming Ni,&nbsp;Minghui Fan,&nbsp;Quanxin Li","doi":"10.1002/jctb.7683","DOIUrl":"10.1002/jctb.7683","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The development of efficient and green pretreatment pathway is of great significance for promoting biofuel production from lignocellulosic waste. The purpose of this work was to evaluate that iron ion-catalyzed hydrogen peroxide pretreatment can be used as an environmentally friendly pretreatment way for bio-jet fuel production using straw.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>The effects of iron ion-catalyzed hydrogen peroxide pretreatment (Fe-HP) on the enzymatic hydrolysis, fermentation and bio-jet fuel production using straw were investigated. It was found that the iron ion-catalyzed hydrogen peroxide pretreatment significantly improved the enzymatic hydrolysis and fermentation efficiency of straw biomass. Subsequently, the directional catalytic transformation of straw-derived fermentation broth to bio-jet fuels was achieved using a dual functional catalyst (HSAPO34/NiHBET). High conversion (94.9%) and good jet-fuel selectivity (77.3%) were obtained in the conversion process of straw. On account of the biomass characterization and the analysis of reactive oxygen species during the Fe-HP pretreatment, the role and mechanism of the Fe-HP pretreatment was addressed.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The Fe-HP pretreatment can be used as an environmentally friendly pretreatment way for jet fuel production from straw biomass. Fe-HP pretreatment increased sugar yield and sugar concentration during enzymatic hydrolysis, which was beneficial for subsequent fermentation and bio-jet fuel production. The reactive oxygen species take a prominent role in the Fe-HP pretreatment of lignocellulose. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141171379","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":"Hydrogen peroxide electrosynthesis using commercial carbon blacks as catalysts: the influence of surface properties and adsorption performance","authors":"Xinyu Han,&nbsp;Shiyu Yuan,&nbsp;Zhaolian Zhu,&nbsp;Jiawen Mei,&nbsp;Qiyuan Huang,&nbsp;Liya Ji,&nbsp;Hailing Wang","doi":"10.1002/jctb.7680","DOIUrl":"10.1002/jctb.7680","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Surface properties and adsorption performance of carbon materials play a crucial role in the electrochemical two-electron oxygen reduction to produce H₂O₂. However, there is still a lack of in-depth research on commercial carbon blacks in this area. Herein, four typical commercial carbon blacks (Acetylene black (AB), Ketjen black EC 600JD, Vulcan XC 72 and Black Pearls 2000) were used as cathode catalysts to generate H₂O₂. Surface chemistry and pore structure of electrodes of the four carbon blacks were systematically characterized, and their effects on H₂O₂ adsorption, electrochemical generation and degradation were investigated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Among the four carbon blacks, AB has the highest content of C–O–C/COOH and CO, which are active groups catalyzing the two-electron oxygen reduction reaction to generate H₂O₂. AB has the lowest level of defects and highest degree of graphitization, and AB-modified graphite felt electrode (AB-Ele) has the largest average pore diameter, smallest specific surface area and smaller charge transfer resistance. H₂O₂ production using AB-Ele is the largest and reaches 567.7 mg L⁻¹ at 180 min under a current density of 5 mA cm⁻², and only decreases by 17.6% after 10 repeated uses.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Overall, rich oxygen-containing functional groups such as C–O–C, COOH and CO, high degree of graphitization, suitable surface area and porosity as well as weak H₂O₂ adsorption performance are beneficial for the two-electron oxygen reduction reaction to generate H₂O₂. AB-modified graphite felt electrode exhibits good catalytic activity and reusability in H₂O₂ electrosynthesis, demonstrating promising application prospects. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141102746","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":"Green synthesis of silver nanoparticles using leaf extract of Woodfordia fruticosa (L.) for potential therapeutic application","authors":"Debasmita Dubey,&nbsp;Rajesh Kumar Meher,&nbsp;Biswaranjan Pradhan,&nbsp;Sadhni Induar,&nbsp;Biswakanth Kar,&nbsp;Pradeep Kumar Naik,&nbsp;Bikash Chandra Behera","doi":"10.1002/jctb.7681","DOIUrl":"10.1002/jctb.7681","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p><i>Woodfordia fruticosa</i> is a well-known medicinal plant traditionally used for various treatment methods. Green synthesis of silver nanocomposite with <i>woodfordia</i> flower extract is well-investigated. However, the therapeutic potential of <i>Woodfordia fruticosa</i> leaf extract silver nanoparticles against various diseases has yet to be investigated.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Silver nanoparticles synthesized from <i>Woodfordia fruticosa</i> leaf extract (Wf-AgNPs) showed UV spectral peaks at 450 nm. Transmission electron microscope (TEM) images, ranging from 20 to 50 nm, confirm the nanosynthesis. The average particle size of 39.63 nm with a zeta potential distribution value 17.0 was observed. Fourier transform infrared peaks ranging from 2942to 669 cm⁻¹ confirm the amines, amides, carboxylic, aldehyde, alkane, phenolic and aliphatic bromo compounds involved in the synthesis of AgNPs. Wf-AgNPs showed higher antioxidant activity compared to the ascorbic acid and BHT. The phenolic and flavonoid content was 141.66 ± 8.50 mg GAE/100 g dry weight and 191.66 ± 5.6 mg quercetin equivalent/100 g dry weight, respectively. Wf-AgNPs showed a strong inverse relationship between the dose and viability of the cancer cells. The antibacterial properties of Wf-AgNPs were confirmed through the bacteria's SEM images. Increased wound healing potential, re-epithelization and elevation of the tensile strength of the infected skin tissue were observed after applying synthesized Wf-AgNPs.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Various phytochemicals in the synthesized nanoparticles confer antimicrobial, antioxidant, anticancer and wound-curing potentiality to the Wf-AgNPs. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141149348","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":"Mathematical modeling of the drying and oil extraction processes of passion fruit seeds using fractional calculus","authors":"Ana Caroline Raimundini Aranha,&nbsp;Rafael Oliveira Defendi,&nbsp;Maria Carolina Sérgi Gomes,&nbsp;Caroline Casagrande Sipoli,&nbsp;Danielli Andrea Nardino,&nbsp;Vitor Viganô Oliveira,&nbsp;Marcelo de Jesus Corte Rosalém,&nbsp;Rúbia Michele Suzuki","doi":"10.1002/jctb.7682","DOIUrl":"10.1002/jctb.7682","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>This article aims to fit kinetic models of the passion fruit seed drying process, in addition to mathematical modeling using traditional models and fractional calculus of the extraction of lipids from the seeds.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Regarding the drying process, it was found that the model that best suited the two drying temperatures employed was the fractional order one.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Analysis showed that for both drying conditions the value of parameter <i>α</i> was greater than 1, indicating that the profile that occurs for the seeds is superdiffusion. Regarding the mathematical fits of oil extraction, it was found that the two models that presented the best fits for the lipid extraction kinetics were hyperbolic and fractional order. Regarding the fractional order model, as the value of parameter <i>α</i> was lower than 1, it can be seen that the process again does not follow Fick's law, and in this case a subdiffusion process occurs. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"141116845","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":"Performance evaluation of Bi/Zn-impregnated commercial TiO2 nanoparticles for photocatalytic nitrobenzene decomposition","authors":"Saurav Mishra,&nbsp;Nandana Chakinala,&nbsp;Anand G. Chakinala,&nbsp;Praveen K. Surolia","doi":"10.1002/jctb.7666","DOIUrl":"10.1002/jctb.7666","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Commercial TiO₂ nanoparticles were subjected to modification through Bi and Zn metal doping. The resulting catalysts were comprehensively characterized, and their performance was then reviewed for removal of model pollutant nitrobenzene in water.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>Amidst the synthesized catalysts, the co-doping of Bi/Zn (0.25:0.75 wt%) demonstrated the best photocatalytic degradation activity, achieving 95% degradation within 90 min of reaction time, with 2.99 × 10⁻² min⁻¹ rate constant value. The involvement of different radicals during the degradation process was elucidated by employing appropriate radical scavengers. Furthermore, the degradation results were investigated applying the first-order kinetic model, leading to the determination of reaction rate constants and initial rates of the degradation process.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>An improved photocatalytic activity was observed with metal doping due to the synergistic effect of doped metals with commercial TiO₂ and profound charge transfer among them. It was observed that performance was increased with temperature rise in the practical range of application, that is, 5–20 °C. This behavior was due to high rate of movement of charge carriers. Further, involvement and functioning of various radical species such as h⁺, OH⁻ and O₂⁻ in nitrobenzene degradation were successfully established using appropriate radical scavengers. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-05-17","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140965837","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":"Naturally derived organic biochar as an alternative to commercially activated carbon in the oxygen removal of seafood processing wastewater","authors":"Rajendiran Dhinesh,&nbsp;Satyapriyan Aruna,&nbsp;D. Manikandavelu,&nbsp;Krishnan Ravaneswaran,&nbsp;Subramoniapillai Sethulekshmi Kirthiga,&nbsp;Khalid A. Al-Ghanim,&nbsp;Chinnaperumal Kamaraj","doi":"10.1002/jctb.7664","DOIUrl":"10.1002/jctb.7664","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The seafood processing industries are tremendously increasing in numbers which eventually discharge a large quantity of wastewater with a high range of biochemical oxygen demand (BOD) and chemical oxygen demand (COD), directly into the aquatic environment. A high level of BOD and COD in wastewater pertains to a higher level of pollution which must be reduced to prevent hazardous impacts on ecosystems. The main objective of the research aimed to develop cost-effective biochar and to remove BOD and COD from processing wastewater using two natural biomasses: water hyacinth and sugarcane bagasse.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>NaOH-treated and non-treated biochar for both water hyacinth as well as sugarcane bagasse were prepared through the process of pyrolysis carried out at 600 °C with three different residence times of 30, 45 and 60 min. The wastewater was initially analyzed for BOD and COD levels. The results showed that among all the groups of biochars, the water hyacinth NaOH-treated biochar pyrolyzed at 600 °C for 60 min exhibited significantly (<i>P</i> &lt; 0.05) higher levels of reduction in BOD (86.6 ± 0.03%) and COD (94.3 ± 0.05%) at a residence time of 60 min in D2 (0.5 g (250 mL)⁻¹). The maximum removal efficiency was observed for water hyacinth NaOH-treated biochar pyrolyzed at 600 °C for 60 min.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>The removal efficiencies of organic load revealed that the treated biochars exhibited a better reduction of nutrients. The biochar efficiencies when compared with those of activated carbon exhibited a higher removal level. The present research can be used to reduce BOD and COD levels in wastewater treatments. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140942028","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":"Nutrient recovery from manure digestate by using waste magnesite powder and bone meal as sustainable substitutes for struvite precipitation","authors":"Feride Ece Kutlar,&nbsp;Iskin Engin,&nbsp;Yasemin Dilsad Yilmazel","doi":"10.1002/jctb.7661","DOIUrl":"10.1002/jctb.7661","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>Struvite (MgNH₄PO₄.6H₂O) precipitation is a sustainable approach that can offer simultaneous removal/recovery of nutrients from biogas plant effluents. However, most biogas plant effluents contain a higher molar concentration of nitrogen (N) than magnesium (Mg) and phosphorus (P). Therefore, the external addition of Mg²⁺ and phosphate (PO₄^3-) salts is needed to maximize the recovery. In this study, Mg-rich waste magnesite powder and P-rich bone meal were used as sustainable additives. The Box–Behnken design was applied to determine optimum conditions of process parameters (pH, Mg:N and P:N molar ratios) to maximize ammonium-nitrogen (NH₄-N), PO₄-P and Mg²⁺recoveries.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>NH₄-N, PO₄-P and Mg²⁺ recoveries were in the ranges 78.5%–96.9%, 69.2%–96.3% and 75.1%–99.9%, respectively. The actual and predicted values showed significant consistency, indicating that the model is satisfactory. Under optimum conditions (pH = 9.0, Mg:N = 2.2, P:N = 1.8), 97.8 ± 0.1% NH₄-N, 96.6 ± 0.31% PO₄-P and 84.4 ± 0.9% Mg²⁺ recovery were attained. The X-ray diffraction results confirmed the sole presence of struvite crystals. Scanning electron microscopy images showed irregular prismatic orthorhombic crystals and amorphous material depositions on precipitates of ~25 μm crystal size. The product was 49% struvite with 15.2% P content. The heavy metal content was lower than regulatory limits.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Even though waste material and industrial by-products have been used as additives in this process, high NH₄-N and PO₄-P recoveries were recorded under optimum conditions. These results are promising and illustrate a powerful example of industrial symbiosis, and the precipitate containing struvite can serve as a valuable product. © 2024 The Authors. <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":null,"pages":null},"PeriodicalIF":3.4,"publicationDate":"2024-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://onlinelibrary.wiley.com/doi/epdf/10.1002/jctb.7661","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140840787","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":"Valorization of guabirobeira leaf extracts (Campomanesia xanthocarpa) through pressurized liquid extraction and aqueous infusion: assessment of phytochemical composition, antibacterial, and antioxidant activities","authors":"Lucíola Bagatini,&nbsp;Bruno Fischer,&nbsp;Giovana Paula Zandoná,&nbsp;Liziane Schittler Moroni,&nbsp;Alexander Junges,&nbsp;Aniela Pinto Kempka,&nbsp;Cesar Valmor Rombaldi","doi":"10.1002/jctb.7663","DOIUrl":"10.1002/jctb.7663","url":null,"abstract":"<div>\u0000 \u0000 \u0000 <section>\u0000 \u0000 <h3> BACKGROUND</h3>\u0000 \u0000 <p>The leaves of guabirobeira contain important phenolic and flavonoid compounds, known for their antioxidant, anti-inflammatory, antibacterial, and antinociceptive activities. The purpose of this work was to obtain extracts from guabirobeira leaves through aqueous infusion and pressurized liquid extraction with water, ethanol, and a combination of water–ethanol (ratio 1:1, v/v; PLE-W:E). Subsequently, we used liquid chromatography coupled with mass spectrometry to identify the chemical compounds, and to study the antioxidant activity in rat brain cells; thiobarbituric acid reactive substances (TBARS) and reactive oxygen species (ROS) antibacterial activity against Gram-negative and Gram-positive bacteria were also seen.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> RESULTS</h3>\u0000 \u0000 <p>According to the findings, all four extracts contained a significant amount of phytochemical compounds. Among them, the PLE-W:E extract showed a higher concentration of flavonoids, demonstrating significant antioxidant activity in <i>in vitro</i> assays of TBARS and ROS in rat brain cells. It also exhibited antibacterial activity against both Gram-positive and Gram-negative bacteria.</p>\u0000 </section>\u0000 \u0000 <section>\u0000 \u0000 <h3> CONCLUSION</h3>\u0000 \u0000 <p>Guabirobeira leaf extracts hold promise as a potential source of bioactive compounds. These extracts can be applied across various sectors, including cosmetics and skincare products, pharmaceuticals, food and beverages, natural preservatives, and functional materials. By exploring these potential applications, valuable contributions can be made to the field of sustainable chemistry and pharmacy, furthering the utilization of guabirobeira leaf extracts in diverse industries. This approach also aligns with the promotion of environmentally friendly and sustainable practices. © 2024 Society of Chemical Industry (SCI).</p>\u0000 </section>\u0000 </div>","PeriodicalId":15335,"journal":{"name":"Journal of chemical technology and biotechnology","volume":null,"pages":null},"PeriodicalIF":2.8,"publicationDate":"2024-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"140804836","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}