Journal of Chemical Technology & Biotechnology最新文献

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Chiral separation of terbutaline by supercritical fluid chromatography with peaks purity determination by UPLC‐MS and modeling for chiral recognition mechanism 用超临界流体色谱法对特布他林进行手性分离,用 UPLC-MS 测定峰纯度,并建立手性识别机制模型
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-15 DOI: 10.1002/jctb.7621
Imran Ali, Syed Dilshad Alam, R. Raja, Arvind K. Jain, Mohd Mustaqeem, Marcello Locatelli, H. Aboul‐Enein, Kareem Yusuf
{"title":"Chiral separation of terbutaline by supercritical fluid chromatography with peaks purity determination by UPLC‐MS and modeling for chiral recognition mechanism","authors":"Imran Ali, Syed Dilshad Alam, R. Raja, Arvind K. Jain, Mohd Mustaqeem, Marcello Locatelli, H. Aboul‐Enein, Kareem Yusuf","doi":"10.1002/jctb.7621","DOIUrl":"https://doi.org/10.1002/jctb.7621","url":null,"abstract":"Terbutaline is the drug of choice for asthma patients but it exist in racemic mixture. (R)‐(‐)‐terbutaline is 200 times more active than (S)‐(+)‐terbutaline and it is not advisable to prescribe racmix xiture due to certain side effects of (S)‐(+)‐terbutaline. Therefore, fast, effective and reproducible separation method is the need of today.Chiral separation was achieved on Chiralpak IE and Chiralpak IG columns (250 mm x 4.6 mm, 5 μm) using CO2‐MeOH (60:40) with 0.2% triethylamine mobile phase. The flow was 1.0 mL/min with detection at 223 nm using a PDA detector. The values of retention, separation and resolution factors were in the range of 1.88 to 2.38, 1.14 to 1.26 and 0.91 to 1.17; with best separation with Chiralpak IE. The tailing factors and number of theoretical plates were in the range of 1.0 to 1.23 and 487 to 3699. The purity of the separated peaks was determined by UPLC‐MS; indicating 100% purity of the peaks. The chiral recognition was determined by modeling with binding affinities ‐5.0 and ‐6.0 of S‐ and R‐enantiomers; indicating S‐enantiomers elution first followed by R‐enantiomers. The major forces responsible for the chiral resolution were hydrogen bonding and π‐π interactions.Due to the great demand for optically active pure drugs and high economic pressure on analytical techniques, the chiral separation of terbutaline was achieved on inexpensive supercritical fluid chromatography. The reported method may be used to prepare optically active pure terbutaline drugs (R‐enantiomers) at a pilot scale.This article is protected by copyright. All rights reserved.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"43 11","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139775673","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis of palladium nanoparticles utilizing biotemplates and investigation of their synergistic catalytic performance 利用生物模板合成钯纳米颗粒并研究其协同催化性能
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-15 DOI: 10.1002/jctb.7602
Wei Xie, Miaomiao Chen, Chao Wu
{"title":"Synthesis of palladium nanoparticles utilizing biotemplates and investigation of their synergistic catalytic performance","authors":"Wei Xie, Miaomiao Chen, Chao Wu","doi":"10.1002/jctb.7602","DOIUrl":"https://doi.org/10.1002/jctb.7602","url":null,"abstract":"Palladium nanoparticles can act as a shuttle to accelerate the extracellular electron transfer (EET) by exoelectrogens. Through the EET process, microorganisms drive the redox cycle of many substances. The palladium nanoparticle has a variety of catalytic activities and activities can be significantly improved by combining with the active effects of microorganisms.In this study, Staphylococcus saprophyticus JJ‐1 was utilized as a biological template carrier to synthesize palladium nanoparticles that were immobilized on the bacterial surface. The morphology and composition of palladium were characterized by various techniques including transmission electron microscopy, energy‐dispersive X‐ray spectroscopy, X‐ray diffraction, X‐ray photoelectron spectroscopy, and Fourier transform infrared spectroscopy. Furthermore, the hydrogenation activity of the synthesized Pd was tested at room temperature and atmospheric pressure using methyl orange as a model pollutant. Electrochemical characterization was carried out by cyclic voltammetry and potentiostatic measurements. The research demonstrated that palladium nanoparticles acted as both electronic mediators and catalysts in the dye reduction process, while S. saprophyticus JJ‐1 contributed to stabilizing nanoparticles and electrochemical activity. The synergistic effect between these two components significantly enhances MO degradation efficiency.This study presented an energy‐saving method to synthesize an integrated catalyst based on the synergistic interaction between biomass and nanoparticles, offering a novel approach for developing environmentally friendly, cost‐effective, and efficient integrated catalysts. © 2024 Society of Chemical Industry (SCI).","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"18 18","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139776094","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Enhancing Bioelectricity Generation from Wastewater in Microbial Fuel Cells Using Carbon Nanomaterials 利用碳纳米材料提高微生物燃料电池中废水的生物发电量
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-15 DOI: 10.1002/jctb.7620
Y. Attia, M. Samer, Mahmoud S.M. Mohamed, Mohamed Salah, Elshaimaa Moustafa, Randa M. Abdel Hameed, Hassan Elsayed, E. Abdelsalam
{"title":"Enhancing Bioelectricity Generation from Wastewater in Microbial Fuel Cells Using Carbon Nanomaterials","authors":"Y. Attia, M. Samer, Mahmoud S.M. Mohamed, Mohamed Salah, Elshaimaa Moustafa, Randa M. Abdel Hameed, Hassan Elsayed, E. Abdelsalam","doi":"10.1002/jctb.7620","DOIUrl":"https://doi.org/10.1002/jctb.7620","url":null,"abstract":"Background: Microbial fuel cells (MFCs) offer a promising approach for treating wastewater and generating electrical energy simultaneously. However, their implementation in wastewater treatment plants is hindered by the limited electricity generation, often attributed to the electrolyte's high resistance. This study aimed to improve bioelectricity generation in MFCs by adding nanomaterials to the electrolyte to enhance conductivity.Results: Three types of nanomaterials, carbon nanotubes (CNTs), graphitic carbon nitride (g‐C3N4), and reduced graphene oxide (r‐GO), were synthesized and addition to the electrolyte at a concentration of 50 mg in 1.5 L. MFC performance was evaluated, employed a Hydraulic Retention Time (HRT) of 140 h, and compared to a control with no nanomaterials added. The addition of nanomaterials significantly improved MFC performance. Compared to the control, the MFCs with CNTs, g‐C3N4, and r‐GO exhibited: Higher voltage: 1.301 V (CNTs), 1.286 V (g‐C3N4), 1.280 V (r‐GO) vs. 0.570 V (control), Increased power density: 14.11 mW/m3 (CNTs), 13.78 mW/m3 (g‐C3N4), 13.66 mW/m3 (r‐GO) vs. 2.71 mW/m3 (control), Enhanced areal power density: 21.06 mW/m2 (CNTs), 20.57 mW/m2 (g‐C3N4), 20.39 mW/m2 (r‐GO) vs. 4.04 mW/m2 (control), and Improved coulombic efficiency: 19.43% (CNTs), 19.19% (g‐C3N4), 19.11% (r‐GO) vs. 8.54% (control).Conclusion: Incorporating nanomaterials into the MFC electrolyte significantly increased bioelectricity generation by 5.21 times and coulombic efficiency by 2.28 times compared to the control. This improvement is attributed to the high specific surface area of the nanomaterials, which facilitates the adhesion and growth of microorganisms around the anode, enhancing direct electron transfer.This article is protected by copyright. All rights reserved.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"20 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139776136","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A novel approach to Hg2+ determination in water samples using carbon dots based on paper and fluorescence digital image analysis 利用碳点纸和荧光数字图像分析测定水样中 Hg2+ 的新方法
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-13 DOI: 10.1002/jctb.7618
M. V. Maia, W. Suarez, Vagner Bezerra dos Santos, Severino Carlos Bezerra de Oliveira, João Paulo Barbosa de Almeida
{"title":"A novel approach to Hg2+ determination in water samples using carbon dots based on paper and fluorescence digital image analysis","authors":"M. V. Maia, W. Suarez, Vagner Bezerra dos Santos, Severino Carlos Bezerra de Oliveira, João Paulo Barbosa de Almeida","doi":"10.1002/jctb.7618","DOIUrl":"https://doi.org/10.1002/jctb.7618","url":null,"abstract":"This work proposes the use of a simple inexpensive method for the hydrothermal synthesis of fluorescent carbon dots nanoparticles (CDs) from rice starch aimed at the determination of Hg2+ in water. The proposed method involved using a paper‐based analytical device coupled to a 3D plate, with a UV‐LED chamber and a smartphone for the acquisition and analysis of the fluorescence digital images of the CDs.The size of the carbon dots ranged from 0.5 to 3 nm, with an average particle size of approximately 1 nm. The functionalization of carbon dots with methimazole allowed a high selective for Hg2+ determination. The results obtained showed a linear response R2 of 0.997 and Hg2+ concentration in the range of 0.5 to 45.0 μΜ with a LOD and LOQ of 0.23 and 0.62 μmol L‐1, respectively. The results of the study show that there are no significant differences, at 95% confidence level, between the data obtained from the application of the proposed method and the reference method.The proposed method is in line with the principles of green chemistry, as it involves the use of renewable sources for starch extraction and a hydrothermal synthesis process that does not employ toxic reagents. In addition, the method employs only 15 μL of reagent/sample.This article is protected by copyright. All rights reserved.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"9 5","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139780563","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of pore size distribution of biomass activated carbon adsorbents on the adsorption capacity 生物质活性炭吸附剂孔径分布对吸附容量的影响
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-13 DOI: 10.1002/jctb.7617
Qiren Wang, Tingyu Li, Haodong Tian, Die Zou, Jia Zeng, Shuang Chen, Hongmei Xie, Guilin Zhou
{"title":"Effect of pore size distribution of biomass activated carbon adsorbents on the adsorption capacity","authors":"Qiren Wang, Tingyu Li, Haodong Tian, Die Zou, Jia Zeng, Shuang Chen, Hongmei Xie, Guilin Zhou","doi":"10.1002/jctb.7617","DOIUrl":"https://doi.org/10.1002/jctb.7617","url":null,"abstract":"In order to investigate the correlation between the pore size distribution of biomass activated carbon adsorbents (BACAs) and VOCs (Volatile Organic Compounds) adsorption/desorption performance. four BACAs with same specific surface area but different pore size distribution were prepared under different experimental conditions and processes.The impact of the pore size distribution of BACAs on the adsorption/desorption performance of benzene, toluene and xylene was investigated. The results indicated that the adsorption ability of the prepared BACAs for benzene, toluene, and xylene was mostly affected by the pore size distributed in 2.60 ~ 3.25 nm, 2.68 ~ 3.35 nm and 4.20 ~ 4.90 nm, respectively, when the studied BACAs had similar specific surface area (SBET ≈ 1080 m2/g). However, the desorption amount of adsorbed benzene molecules mainly relies on the pore structure of the BACAs with the pore size distributed in 3.95 ~ 4.60 nm.The pore structures of BACAs distributed in different pore size ranges have various effects on the phenyl VOCs adsorption capacity. Benzene adsorption on the BACAs were mainly affected by the microporous structures. The pore structure with larger pore size was more favorable for the desorption of the adsorbed toluene and xylene molecules compared to the adsorbed benzene molecules. Benzene, toluene, and xylene had low residual rates in the studied activated carbon adsorbents to show superior regenerative properties. This work could provide an important reference for the design, preparation, and selection of activated carbon adsorbents for the adsorption capacity of benzene, toluene, and xylene.This article is protected by copyright. All rights reserved.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"53 21","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139779973","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
The correlation between the iodine value of coconut shell carbon and their reaction performance for NO2 to NO 椰壳碳的碘值与其将二氧化氮转化为氮氧化物的反应性能之间的相关性
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-13 DOI: 10.1002/jctb.7619
Shifang Mu, Hongliang Wang, Yan Wang, Junchao Gu, Yujing Weng, Qi Sun, Yulong Zhang
{"title":"The correlation between the iodine value of coconut shell carbon and their reaction performance for NO2 to NO","authors":"Shifang Mu, Hongliang Wang, Yan Wang, Junchao Gu, Yujing Weng, Qi Sun, Yulong Zhang","doi":"10.1002/jctb.7619","DOIUrl":"https://doi.org/10.1002/jctb.7619","url":null,"abstract":"The precise detection of NO2 requires the conversion of NO2 to NO using a molybdenum conversion furnace. Currently, molybdenum wire is utilized as the conversion agent for the molybdenum furnace; however, the high operating temperature of the molybdenum wire can inadvertently convert NH3 in industrial exhaust gas to NO, potentially impacting the accuracy of the detection process. Consequently, there is a pressing need to develop low‐temperature conversion agents. The study aims to establish a correlation between the iodine value, which characterizes the liquid‐phase adsorption properties of activated carbon, and its capacity for NO2 conversion, with the potential to provide valuable theoretical insights supporting the development of commercial molybdenum furnace conversion agents.The iodine value of coconut shell carbon is closely related to their reaction performance for NO2 to NO among three samples with different iodine values. AC‐900, AC‐1200, and AC‐1500 exhibit notable NO2 to NO conversion capabilities. Specifically, AC‐900 demonstrates significantly superior reaction performance compared to AC‐1200 and AC‐1500. Under conditions of 175 °C and 1 L/min, the NO2 conversion rates for AC‐900, AC‐1200, and AC‐1500 are measured at 97.3%, 88.2%, and 86.4%, respectively. Furthermore, the evaluation of AC‐1200 and AC‐1500 at different flow rates at 125 °C reveals a decrease in NO2 conversion with increasing gas flow rate. AC‐1200 exhibits better reaction performance compared to AC‐1500.The structure‐activity relationship between iodine value of coconut shell carbon and their performance for NO2 to NO is revealed. The capacity of activated carbon to convert NO2 is significantly influenced by the presence of oxygen functional groups and the proportion of micropores. The content of micropores and oxygen‐containing functional groups, especially phenolic hydroxyl groups, decreases with the increase of iodine value, leading to a decrease in the reaction performance of the conversion agent.This article is protected by copyright. All rights reserved.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"7 8","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139780445","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Amine‐modified acid‐activated attapulgite as efficient and stable adsorbents for CO2 capture from flue gas 胺改性酸活性阿塔蓬石作为高效稳定的吸附剂用于捕集烟气中的二氧化碳
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-13 DOI: 10.1002/jctb.7586
Zhong He, Wenjie Liu, Kun Han, Jiangjun Hu
{"title":"Amine‐modified acid‐activated attapulgite as efficient and stable adsorbents for CO2 capture from flue gas","authors":"Zhong He, Wenjie Liu, Kun Han, Jiangjun Hu","doi":"10.1002/jctb.7586","DOIUrl":"https://doi.org/10.1002/jctb.7586","url":null,"abstract":"Fossil fuel power plants are the primary contributors to carbon dioxide (CO2) emissions, necessitating effective and stable methods for adsorbing CO2 from flue gas under diverse conditions. Achieving this remains challenging due to the complexity of flue gas compositions and the prolonged operation of adsorption processes.This study focuses on enhancing CO2 adsorption in flue gas using attapulgite (ATP), activated by acid and modified with tetraethylenepentamine (TEPA) via an impregnation method. Characterization through X‐ray diffraction, Fourier transform infrared spectroscopy, scanning electron microscopy, thermogravimetric analysis, and N2 adsorption–desorption revealed that acidic treatment removed impurities, enhancing BET (Brunauer–Emmett–Teller) surface area. TEPA modification significantly increased CO2 adsorption capacity by providing more active sites. Notably, 30TEPA/HATP exhibited the best performance at 3.28 mmol g−1. Optimal CO2 adsorption occurred at 60 °C in simulated flue gas, with water improving amine utilization. Furthermore, 30TEPA/HATP demonstrated consistent CO2 adsorption capacity (3.04 mmol g−1) across concentrations (10–20 vol%) and maintained stability after ten cycles, experiencing only a 7.0% decrease.The findings underscore the success of low‐cost ATP, modified with TEPA, in achieving excellent CO2 capture and stability under diverse flue gas conditions. This material holds promise for practical engineering applications in mitigating carbon emissions from fossil fuel power plants. © 2024 Society of Chemical Industry (SCI).","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology & Biotechnology","volume":"117 49","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139781005","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Synthesis and functionalization of carbon nanostructures in a single‐step CVD process through the implementation of a recycled precursor 通过使用循环前驱体,在一步 CVD 工艺中合成碳纳米结构并使其功能化
Journal of Chemical Technology & Biotechnology Pub Date : 2024-02-09 DOI: 10.1002/jctb.7604
Cintya Arroyo-Arroyo, F. G. Granados‐Martínez, L. Domratcheva‐Lvova, O. Hernández‐Cristóbal, N. Flores‐Ramírez, S. R. Vasquez‐Garcia
{"title":"Synthesis and functionalization of carbon nanostructures in a single‐step CVD process through the implementation of a recycled precursor","authors":"Cintya Arroyo-Arroyo, F. G. Granados‐Martínez, L. Domratcheva‐Lvova, O. Hernández‐Cristóbal, N. Flores‐Ramírez, S. R. Vasquez‐Garcia","doi":"10.1002/jctb.7604","DOIUrl":"https://doi.org/10.1002/jctb.7604","url":null,"abstract":"Recycled materials are a major research topics of the new era to relieve pressure on raw material extraction from our planet and reduce its pollution levels. This has helped us to reinvent our relationship with nature, and to commit ourselves to a sustainable economic and social reconstruction. An excellent option to add value to waste while protecting the environment is the synthesis of carbon nanostructures (CNSs) using a recycled material as a precursor. In this research, the synthesis and functionalization of CNSss in a single‐step chemical vapour deposition (CVD) process was carried out using a recycled precursor. The methanol fraction is waste from the distillation process in the production of alcoholic beverages. The synthesis temperatures were 750, 800 and 850 °C.As a result, carbon nanotubes, carbon nanoribbons and carbon nanobeads with diameters <100 nm and widths <500 nm were obtained. The crystal size of CNSs decreased with increasing synthesis temperature, from 20 to 12 nm. RAMAN spectra revealed the high degree of graphitization and the presence of different types of nanostructures. Carbonyl (CO) and hydroxide (‐OH) stretching of the carboxylic acid were present in all samples.The results obtained shown that the CNSs synthetized are functionalized in a single‐step CVD process using the methanolic fraction as a precursor. © 2024 Society of Chemical Industry (SCI).","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology &amp; Biotechnology","volume":" 24","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139790076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of iron powder on hydrogen sulfide reduction and phosphate removal in semi‐continuous anaerobic digestion treating primary sludge 铁粉对处理初级污泥的半连续厌氧消化中硫化氢还原和磷酸盐去除的影响
Journal of Chemical Technology &amp; Biotechnology Pub Date : 2024-02-07 DOI: 10.1002/jctb.7594
Seung‐Jun Oh, Seung‐Han Ha, Eui Jeong Noh, Seung Gu Shin, Johng‐Hwa Ahn
{"title":"Effect of iron powder on hydrogen sulfide reduction and phosphate removal in semi‐continuous anaerobic digestion treating primary sludge","authors":"Seung‐Jun Oh, Seung‐Han Ha, Eui Jeong Noh, Seung Gu Shin, Johng‐Hwa Ahn","doi":"10.1002/jctb.7594","DOIUrl":"https://doi.org/10.1002/jctb.7594","url":null,"abstract":"To our best knowledge, no experimental study has previously investigated the simultaneous effects of adding Fe powder for the decrease of hydrogen sulfide (H2S) in biogas and the removal of phosphate (PO4‐P) in continuous anaerobic digestion (AD). This study investigated the effects of iron (Fe) powder (5 g L−1) in AD to remove H2S and PO4‐P. A comparative experiment was conducted using two semi‐continuous‐flow anaerobic digesters treating primary sludge at decreasing hydraulic retention times (HRTs) of 20 to 10 days.The addition of Fe powder to AD removed > 98% of H2S at all HRTs, and removed 64–72% of PO4‐P, with the highest removal efficiency at HRT = 10 d. The addition of Fe powder to AD had no noticeable effect on biogas production or pH, but it increased the CH4 content (62.7–66.0% in Fe‐treated vs 58.2–60.4% in the Control) partly due to the greater presence of Methanoregulaceae. The relative abundance of the microbial groups was more affected by HRT than by the addition of Fe powder. The presence of Fe powder notably increased the abundance of Spirochaetaceae and Syntrophaceae.As shown, the addition of Fe powder can improve the management of both H2S in the biogas and PO4‐P in the digested sludge in the AD system. © 2024 Society of Chemical Industry (SCI).","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology &amp; Biotechnology","volume":"271 10","pages":""},"PeriodicalIF":0.0,"publicationDate":"2024-02-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139857637","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Complete wastewater discoloration by a novel peroxidase source with promising bioxidative properties 一种具有良好生物氧化特性的新型过氧化物酶源完成废水变色
Journal of Chemical Technology &amp; Biotechnology Pub Date : 2021-08-27 DOI: 10.21203/rs.3.rs-846230/v1
Natalia Klanovicz, F. Stefanski, A. F. Camargo, W. Michelon, H. Treichel, A. C. Teixeira
{"title":"Complete wastewater discoloration by a novel peroxidase source with promising bioxidative properties","authors":"Natalia Klanovicz, F. Stefanski, A. F. Camargo, W. Michelon, H. Treichel, A. C. Teixeira","doi":"10.21203/rs.3.rs-846230/v1","DOIUrl":"https://doi.org/10.21203/rs.3.rs-846230/v1","url":null,"abstract":"\u0000 The occurrence of micropollutants in aqueous matrices has become a global concern and a challenge for wastewater treatment plants. Monitoring their toxicity has shown that these compounds, even at low concentrations, pose risks to human and environmental health. Therefore, our study aimed to prospect immobilization strategies for non-commercial oxidoreductase enzymes and insert them in the context of pollutant remediation. The enzymatic extract was obtained by submerged fermentation of the fungus Trichoderma koningiopsis in an alternative substrate, consisting of fresh microalgal biomass from the phycoremediation process. The immobilization efficiency of peroxidase (POD) was evaluated by monitoring the residual activity (RA) and the discoloration potential (DP) of a synthetic dye solution. Concomitantly, the catalytic properties of free POD were explored, and the most promising storage strategy to maintain the enzymatic activity was studied. Guaiacol peroxidase from T. koningiopsis expressed specific activity of up to 7801.1 U mg− 1 in the free form, showing stability when subjected to up 80°C in a pH range between 4.0–8.0. Furthermore, the bioproduct immobilized on magnetic nanoparticles expressed up to 688% RA and 100% DP. An increase in the RA of the enzyme, both in free and immobilized form, was also observe after storage for up to 8 months. The synthesized magnetic nanozymes showed good reusability, maintaining 13546.4 U mg− 1 after ten cycles and removing 93% of color in a second batch. Toxicological evaluation with Allium cepa indicated that the enzymatic process of color removal with immobilized POD, despite maintaining unwanted cytotoxic effects, was essential to eliminate genotoxic effects. In this sense, the immobilization processes of T. koningiopsis peroxidase presented in our work are promising for the enzyme market and for the wastewater treatment sector.","PeriodicalId":306678,"journal":{"name":"Journal of Chemical Technology &amp; Biotechnology","volume":"135 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126984423","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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