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Biosorption of tetracycline antibiotics by Lactarius deliciosus biomass 美味乳酸菌生物量对四环素类抗生素的吸附
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-10-10 DOI: 10.1080/00986445.2023.2266684
Aslı Göçenoğlu Sarıkaya, Bilgen Osman, Elif Tümay Özer
ABSTARCTIn this study, Lactarius deliciosus biomass was used as a biosorbent for the biosorption of three tetracycline antibiotics, chlortetracycline (CTC), doxycycline (DC), and tetracycline (TC), from aqueous solution. The biomass was characterized by Fourier Transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effect of biosorbent amount (0.01–0.1g), pH (3.0–8.0), initial antibiotic concentration (30–300 mg/L for CTC and DC, and 5–50 mg/L for TC), contact time (2–120 min), and temperature (7 °C, 16 °C, 25 °C) were investigated. The maximum biosorption amount of CTC, DC, and TC was 216.4 ± 4.2 mg/g (pH 4.0), 121.2 ± 6.2 mg/g (pH 3.0), and 23.2 ± 2.1 mg/g (pH 7.0) at 25 °C, respectively. The biosorption amount of tetracyclines decreased with increasing temperature demonstrating that the biosorption processes were exothermic. The biosorptions of tetracyclines were favorable with negative ΔG° values for all temperatures. CTC and DC biosorption processes were well fitted to the pseudo-second-order kinetic and Freundlich isotherm models. TC biosorption data obeyed the pseudo-first-order kinetic model. Tap and drinking water samples spiked with tetracyclines were used as real samples for biosorption. The results showed that L. deliciosus biomass could be effectively used as a biosorbent for tetracycline antibiotics with high adsorption capacities.Keywords: BiosorptionbiomassLactarius deliciosusremovaltetracyclinesthermodynamic Disclosure statementThe authors confirm that this article content has no conflict of interest.Data availabilityThe authors declare that the data supporting the findings of this study are available within the paper and supporting information.Additional informationFundingThis work was supported by the Research Foundation of Bursa Uludag University (Project No: FHIZ-2021-590).
摘要本研究以deliciosus的生物量作为生物吸附剂,从水溶液中吸附3种四环素类抗生素:氯四环素(CTC)、强力霉素(DC)和四环素(TC)。利用傅里叶红外光谱(FTIR)和扫描电镜(SEM)对生物量进行了表征。考察了生物吸附剂用量(0.01 ~ 0.1g)、pH(3.0 ~ 8.0)、初始抗生素浓度(CTC和DC为30 ~ 300 mg/L, TC为5 ~ 50 mg/L)、接触时间(2 ~ 120 min)和温度(7℃、16℃、25℃)对细菌生长的影响。在25℃条件下,CTC、DC和TC的最大生物吸附量分别为216.4±4.2 mg/g (pH 4.0)、121.2±6.2 mg/g (pH 3.0)和23.2±2.1 mg/g (pH 7.0)。四环素类药物的生物吸附量随着温度的升高而降低,表明生物吸附过程是放热的。在所有温度下,四环素类药物的生物吸附均为负ΔG°。CTC和DC生物吸附过程均符合拟二级动力学和Freundlich等温线模型。TC吸附数据符合准一级动力学模型。自来水和饮用水样品加入四环素作为实际样品进行生物吸附。结果表明,松茸菌生物量具有较高的吸附能力,可作为四环素类抗生素的生物吸附剂。关键词:生物吸附生物质美味乳酸菌去除四环素热力学公开声明作者确认本文内容无利益冲突。数据可得性作者声明,支持本研究结果的数据在论文和支持信息中是可用的。本研究由Bursa Uludag大学研究基金会资助(项目编号:FHIZ-2021-590)。
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引用次数: 0
Crystal violet adsorption onto modified biosorbent prepared from agricultural waste: kinetics, isotherm and thermodynamic studies 由农业废弃物制备的改性生物吸附剂对结晶紫的吸附:动力学、等温线和热力学研究
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-10-10 DOI: 10.1080/00986445.2023.2266677
Betul Tuba Gemici
AbstractThe present study investigated crystal violet removal by modifying the chestnut shell with a chemical activation method. For this purpose, H2SO4 and NaOH pretreatments were applied to the chestnut shell and the pretreatment method that gave the best performance under the same conditions was determined. The best adsorption efficiency was achieved with the NaOH pretreatment (99.06%) and the crystal violet adsorption reached equilibrium within 60 min. After selecting the best chemical activation method, the modified chestnut shell was characterized before and after adsorption (FTIR and SEM). Furthermore, the effects of parameters such as pH, initial crystal violet concentration, adsorbent dosage, temperature, and contact time were observed. Moreover, isotherm, kinetics and thermodynamics of the adsorption process were researched in detail. The best results were obtained with the Langmuir isotherm model (R2=0.99) and the pseudo-second-order kinetic model (R2=0.99). Thermodynamic parameters showed that the adsorption process is spontaneous, endothermic and feasible.Keywords: Adsorptioncrystal violetisothermkineticsmodified chestnut shellthermodynamic Authors’ contributionsB.T.G. conducted all the experiments and data analyses and prepared original draft.Disclosure statementThe author declares that there is no conflict of interest.
摘要本文研究了化学活化法修饰板栗壳去除结晶紫的方法。为此,对板栗壳进行了H2SO4和NaOH预处理,确定了在相同条件下性能最佳的预处理方法。NaOH预处理达到最佳吸附效率(99.06%),结晶紫吸附在60 min内达到平衡。选择最佳化学活化方法后,对改性板栗壳吸附前后进行了表征(FTIR和SEM)。考察了pH、结晶紫初始浓度、吸附剂用量、温度、接触时间等参数对吸附效果的影响。并对吸附过程的等温线、动力学和热力学进行了详细研究。Langmuir等温线模型(R2=0.99)和拟二级动力学模型(R2=0.99)得到的结果最好。热力学参数表明,吸附过程是自发的、吸热的、可行的。关键词:吸附;结晶;紫;负责所有实验和数据分析,并撰写初稿。披露声明作者声明不存在利益冲突。
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引用次数: 0
Interaction of sodium alginate biopolymer with sodium dodecyl sulfate in aqueous medium and different additive solutions at several temperatures 海藻酸钠生物聚合物与十二烷基硫酸钠在水介质和不同添加剂溶液中不同温度下的相互作用
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-30 DOI: 10.1080/00986445.2023.2255530
Afia Abida Sultana, Md. Habibur Rahman, Md. Tuhinur R. Joy, Shahed Rana, Javed Masood Khan, Dileep Kumar, Anis Ahmad, Md. Anamul Hoque, Mohammad Majibur Rahman, Shariff E. Kabir
AbstractInteractions between sodium dodecyl sulfate (SDS) and sodium alginate (NaAlg) in aq. salts/hydrotrope (HDT) media have been investigated using conductivity method with changing the micellar parameters (e.g., critical micelles concentration (CMC), extent of micelle ionization (α), and bound counterions (β)) and thermodynamics of the micellization of SDS + NaAlg mixtures. CMC values and α were assessed from the plots of conductivity versus [SDS]. The micellization of SDS + NaAlg was enhanced in aq. electrolyte and aq. HDTs media. The formation of SDS + NaAlg micelles was found to happen delayed with an increase in temperature in water and aq. 10% (w/w) glycerol (GLY) solution, while in other employed solvents, micelle creation was observed to favor with an upsurge of working temperature. Thermodynamics of SDS + NaAlg mixtures were computed from temperature dependency of CMC. The values of ΔG0m were found negative for all the experiments, thereby, examined. The values of ΔHm0 in the micellization of SDS + NaAlg mixtures in H2O, H2O + sodium acetate (NaOAc), H2O + sodium benzoate (NaBenz), and H2O + 4-amino benzoic acid (4-ABA) media were observed positive, and, hence, the process was endothermic in these solvents. Micellization of SDS + NaAlg was exothermic in 10% (w/w) glycerol (GLY) solutions at all temperatures and in H2O + NaCl at 298.15 and 303.15 K. The values of ΔHm0 and ΔSm0 for SDS + NaAlg show that the hydrophobic, van der Waals and exothermic interactions are the driving forces between SDS and NaAlg in electrolytes and HDT media.Keywords: CMChydrophobic interactionhydrotropessodium alginatesodium dodecyl sulfatethermodynamics Data availability statementOur data are provided as electronic supplementary material.Disclosure statementNo potential conflict of interest was reported by the authors.Additional informationFundingResearchers Supporting Project number (RSP2023R360), King Saud University, Riyadh, Saudi Arabia.
摘要采用电导率法研究了十二烷基硫酸钠(SDS)和海藻酸钠(NaAlg)在水盐/水相(HDT)介质中通过改变胶束参数(如临界胶束浓度(CMC)、胶束电离程度(α)和结合反离子(β))和SDS + NaAlg混合物胶束热力学的相互作用。通过电导率与[SDS]对照图评估CMC值和α值。SDS + NaAlg在aq电解质和aq HDTs介质中的胶束化增强。在水和10% (w/w)甘油(GLY)溶液中,SDS + NaAlg胶束的形成随着温度的升高而延迟,而在其他溶剂中,随着工作温度的升高,胶束的形成有利于SDS + NaAlg胶束的形成。从CMC的温度依赖性出发,计算了SDS + NaAlg混合物的热力学。ΔG0m的值在所有实验中均为负值,因此进行了检查。SDS + NaAlg混合物在H2O、H2O +乙酸钠(NaOAc)、H2O +苯甲酸钠(NaBenz)和H2O + 4-氨基苯甲酸(4-ABA)介质中胶束的ΔHm0值均为正,因此在这些溶剂中胶束过程为吸热过程。SDS + NaAlg在10% (w/w)甘油(GLY)溶液和298.15和303.15 K的H2O + NaCl溶液中均发生放热胶束化。SDS + NaAlg的ΔHm0和ΔSm0值表明,在电解质和HDT介质中,疏水、范德华和放热相互作用是SDS与NaAlg相互作用的驱动力。关键词:甲基疏水相互作用亲水海藻酸钠十二烷基硫酸钠热力学数据可用性声明我们的数据作为电子补充材料提供。披露声明作者未报告潜在的利益冲突。资助研究人员支持项目编号(RSP2023R360),沙特阿拉伯利雅得沙特国王大学。
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引用次数: 2
Modeling of a bubble column for CO 2 removal by absorption with NaOH 用NaOH吸附去除co2的气泡塔模型
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-28 DOI: 10.1080/00986445.2023.2261105
Johan Michelson, Päivi Mäki-Arvela, Pasi Rajala, Markus Hallapuro, Daniel Schmid, Oskar Karlström, Johan Wärnå, Dmitry Yu Murzin
AbstractCO2 capture experiments were carried out in a small-scale bubble column reactor using alkaline solutions of sodium hydroxide. The results of the experiments show that a higher NaOH content in the liquid phase and elevated CO2 concentrations in the gas mixture led to a higher CO2 removal efficiency. A mathematical model was developed to describe the CO2 absorption as a function of CO2 gas inlet and OH- concentrations at low CO2 and OH- concentrations. The CO2 uptake at high OH- concentrations (high pH) was accurately predicted by the model, whereas the CO2 uptake at lower OH- concentrations could not be predicted with the same accuracy.Keywords: CO2 removalNaOHabsorption isothermpH dependencemodellingbubble column Disclosure statementNo potential conflict of interest was reported by the authors.
摘要采用碱性氢氧化钠溶液,在小型泡塔反应器中进行了co2捕集实验。实验结果表明,液相中NaOH含量越高,混合气中CO2浓度越高,CO2去除率越高。建立了一个数学模型,描述了低CO2和低OH浓度下CO2气体入口和OH-浓度对CO2吸收量的影响。该模型能准确预测高OH-浓度(高pH)下的CO2吸收量,而较低OH-浓度下的CO2吸收量则不能达到相同的预测精度。关键词:CO2去除naoh吸附等温线h依赖性模型气泡柱披露声明作者未报告潜在利益冲突。
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引用次数: 0
Effect of storage time and temperature on the stability and rheological properties of starch-soluble dietary fiber nanocomposite stabilized emulsion 贮藏时间和温度对淀粉溶性膳食纤维纳米复合稳定乳稳定性和流变性质的影响
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-28 DOI: 10.1080/00986445.2023.2261099
Yvonne Maphosa, Daniel I. Ikhu-Omoregbe, Oladayo Adeyi, Victoria A. Jideani
AbstractNanocomposites are a promising material for the stabilization and rheology modification of food emulsions due to their unique physicochemical properties. The effects of storage time and temperature on the rheological and stability properties of Bambara groundnut starch-soluble dietary fiber nanocomposite (STASOL) stabilized emulsions were evaluated. Emulsions were formulated with orange oil (30%), water (50%) and STASOL (20%). The backscattering profile of emulsions stored at 5 and 45 °C showed the least and most separation between scans, respectively. On day 20, the emulsions stored at 45 °C had completely separated into two layers. The viscosity of emulsions stored at 20 and 45 °C decreased after the third day while that of emulsions stored at 5 °C had significantly (p < 0.05) decreased after nine days. Time and temperature both played a major role in the destabilization of emulsions, with those stored at 5 and 45 °C showing the least and most destabilization over time, respectively.Keywords: Bambara groundnutemulsionsnanocompositerheologystability Authors’ contributionsYvonne Maphosa: conceived and designed the experiments; performed the experiments; analyzed and interpreted the data; authored the paper. Daniel Ikhu-Omoregbe: conceived and designed the engineering experiments; interpreted the data; proofread the paper. Oladayo Adeyi: conceived and designed the engineering experiments; interpreted the data; authored part of the paper. Victoria Jideani: conceived and designed the experiments; analyzed and interpreted the data; contributed reagents, materials and analysis tools.Disclosure statementThe authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.Additional informationFundingThis work was supported by the South African National Research Foundation, the Cape Peninsula University of Technology Vice Chancellor’s Fund and the Cape Peninsula University of Technology Research Fund.
摘要纳米复合材料以其独特的物理化学性质,在食品乳剂的稳定和流变改性方面具有广阔的应用前景。研究了贮藏时间和温度对班巴拉花生淀粉溶性膳食纤维纳米复合材料(STASOL)稳定乳剂流变学和稳定性的影响。用橙油(30%)、水(50%)和STASOL(20%)配制乳剂。在5°C和45°C下储存的乳剂的后向散射曲线分别显示出扫描间隔最小和最大。在第20天,在45℃下储存的乳剂完全分离成两层。20°C和45°C条件下乳剂的黏度在第3天后降低,5°C条件下乳剂的黏度在第9天后显著降低(p < 0.05)。时间和温度对乳剂的不稳定性都起着重要的作用,在5°C和45°C下储存的乳剂随着时间的推移,其不稳定性分别最小和最大。关键词:班巴拉地面纳米乳液纳米复合材料流变稳定性作者贡献syvonne Maphosa:构思和设计实验;进行实验;分析和解释数据;撰写论文。Daniel Ikhu-Omoregbe:构思和设计工程实验;解释数据;校对论文。Oladayo Adeyi:构思和设计工程实验;解释数据;撰写了部分论文。Victoria Jideani:构思和设计实验;分析和解释数据;提供试剂、材料和分析工具。披露声明作者声明,他们没有已知的竞争经济利益或个人关系,可能会影响本文所报道的工作。本研究得到了南非国家研究基金会、开普半岛科技大学副校长基金和开普半岛科技大学研究基金的支持。
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引用次数: 0
Bubble behavior in a vacuum fluidized bed 真空流化床中的气泡行为
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-27 DOI: 10.1080/00986445.2023.2261100
Hengzhi Chen, Wangyang Zou
AbstractBubble behavior in a vacuum fluidized bed was investigated in this work. Experimental results showed that bubble diameter and rise velocity increased with declining the pressure, whereas bubble density decreased. The evolution of bubble density with bed height could be divided into three stages on the basis of the corresponding net-coalescence rates. The decrease in bubble density in the bottom region accelerated as the pressure decreased, whereas the increase in bubble density in the top region was gentle. Increasing the vacuum degree enlarged the variation in bubble size, resulting in the decline of operating stability in the fluidized bed. A new correlation that considered the effect of operating pressure on bubble behaviors exhibited accurate prediction in the vacuum fluidized bed. Bubble velocity was proportional to bubble diameter for small bubbles, and bed structure obviously affected the rise velocity of large bubbles. The distribution of the bubble aspect ratio was positively skewed and many bubbles had a tendency to become slender as the operating pressure decreased.Keywords: Bubble behaviorcoalescence ratedigital image processingvacuum fluidized bed Disclosure statementNo potential conflict of interest was reported by the authors.
摘要本文对真空流化床中的气泡行为进行了研究。实验结果表明,随着压力的降低,气泡直径和上升速度增大,气泡密度减小。根据净聚结速率,气泡密度随层高的演化可分为三个阶段。随着压力的减小,底部气泡密度的减小速度加快,而顶部气泡密度的增大较为平缓。真空度的增大增大了气泡尺寸的变化,导致流化床运行稳定性下降。在真空流化床中,考虑了操作压力对气泡行为的影响,建立了一个新的关系式,对气泡行为进行了准确的预测。小气泡的气泡速度与气泡直径成正比,床层结构对大气泡的上升速度影响明显。气泡长径比的分布呈正偏态,随着操作压力的降低,许多气泡有变细的趋势。关键词:气泡行为聚结率数字图像处理真空流化床披露声明作者未报告潜在利益冲突。
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引用次数: 0
Study on adsorption of methylene blue by modified peanut shell: adsorption kinetics, thermodynamics, isotherm properties 改性花生壳对亚甲基蓝的吸附研究:吸附动力学、热力学和等温性质
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-19 DOI: 10.1080/00986445.2023.2255533
Qing-Zhou Zhai
AbstractIn order to study the adsorption effect of peanut shell as adsorbent on dye wastewater in industry, the optimum adsorption conditions of peanut shell for methylene blue were explored in this article. The decolorized peanut shell was activated by zinc chloride and the adsorption rate of methylene blue dye was improved. Through the research of different conditions such as pH value, contact time, adsorption temperature, initial dye concentration and adsorbent dosage, the optimal adsorption conditions of methylene blue dye were obtained. The adsorption effect achieved was the best at pH 10. Kinetics, thermodynamics, adsorption isotherm properties of the adsorption of methylene blue onto the peanut shell activated by zinc chloride were studied. The adsorption satisfied the Freundlich isothermal adsorption equation and the adsorption process was exothermic. The present adsorption system is a heterogeneous adsorption. The adsorption of methylene blue onto peanut shell accorded with a quasi-second-order adsorption kinetics. This adsorption was a physicochemical adsorption. Finally, the involved adsorption materials prepared were characterized by scanning electron microscopy, X-ray diffraction and infrared spectroscopy. This method can effectively adsorb the methylene blue pollutants in water and solves the problem of the environmental pollution caused by the direct discharge of dye wastewater, which has certain economic and social benefits.Keywords: Adsorptionisothermkinetic propertymethylene bluepeanutshellthermodynamic propertyzinc chloride modification Availability of data and materialsThe datasets used or analyzed during the current study are available from the corresponding author on reasonable request.Authors’ contributionQ.-Z. Zhai conceived and designed the experiments. The experiments were performed by Q.-Z. Zhai. Data was analyzed by Q.-Z. Zhai. The manuscript was written by Q.-Z. Zhai. The manuscript was reviewed and corrected by Q.-Z. Zhai.Consent for publicationAll authors have read this manuscript and consent for publication.Disclosure statementThe authors declare no competing interests.Additional informationFundingThe authors thank the financial support “Research on the Adsorption of Water and Soil Pollutants Heavy Metals and Harmful Dyes by Waste Tea and Peanut Shell” by the Natural Science Foundation of Jilin Provincial Science and Technology Department from the Science and Technology Development Program of Jilin Province, China (20220101096JC/611220683029/KYC-JC-XM-2022−111).
摘要为了研究花生壳作为吸附剂对工业染料废水的吸附效果,探讨了花生壳对亚甲基蓝的最佳吸附条件。用氯化锌活化脱色花生壳,提高了亚甲基蓝染料的吸附率。通过对pH值、接触时间、吸附温度、染料初始浓度、吸附剂用量等不同条件的研究,得到了亚甲基蓝染料的最佳吸附条件。pH值为10时吸附效果最佳。研究了氯化锌活化花生壳吸附亚甲基蓝的动力学、热力学和吸附等温线性质。吸附符合Freundlich等温吸附方程,吸附过程为放热吸附。目前的吸附体系为非均相吸附。亚甲基蓝在花生壳上的吸附符合准二级吸附动力学。这种吸附是一种物理化学吸附。最后用扫描电镜、x射线衍射和红外光谱对所制备的吸附材料进行了表征。该方法能有效吸附水中的亚甲基蓝污染物,解决了染料废水直接排放造成的环境污染问题,具有一定的经济效益和社会效益。关键词:吸附,等温动力学性质,亚甲基蓝,花生壳,热力学性质,氯化锌改性,数据和材料的可用性,本研究中使用或分析的数据集,应合理要求,可从通讯作者处获得。作者的contributionQ.-Z。翟构思并设计了这些实验。实验由Q.-Z进行。翟。数据由Q.-Z分析。翟。手稿是q - z写的。翟。稿子由Q.-Z审阅和修改。翟。所有作者都已阅读本文并同意发表。披露声明作者声明无利益竞争。吉林省科技发展计划项目(20220101096JC/611220683029/KYC-JC-XM-2022−111)资助“废茶和花生壳对水土污染物重金属和有害染料的吸附研究”。
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引用次数: 0
Low carbon steel corrosion inhibition using environment-friendly Solanum Lycopersicum extract in monoprotic and diprotic acidic medium 环保番茄茄提取物在单、双质子酸性介质中对低碳钢的缓蚀作用
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-11 DOI: 10.1080/00986445.2023.2255545
Priya Vashishth, Bindu Mangla, Himanshi Bairagi, Rajni Narang, Sudhish Kumar Shukla
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引用次数: 1
Curcuminoid extraction from rhizomes of Curcuma longa via aqueous two phases system 双水相萃取法提取姜黄根茎中的姜黄素
4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-09-09 DOI: 10.1080/00986445.2023.2253159
Pinutta Kasemwattanarot, Naphaphan Kunthakudee, Boonta Chutvirasakul, Prakorn Ramakul
The extraction of curcuminoids [curcumin (C21H20O6, CUR), demethoxycurcumin (C20H18O5, DMC), and bisdemethoxycurcumin (C19H16O4, BDMC)] from Curcuma longa rhizomes was investigated using an aqueous two-phase system (ATPS) with ethanol/salt. The optimized conditions for the extraction process were determined by a central composite design to be an ethanol concentration of 13.6%, an ammonium sulfate concentration of 33.2%, and a temperature of 66.8 °C. Under these conditions, the highest yield of 97.9% was achieved, accompanied by a notable antioxidant activity of 84.38%. The experimental data exhibited good agreement with a second-order kinetic model, as confirmed by the evaluation of the coefficient of determination (R2), normalized standard deviation, and average relative error.
采用乙醇/盐双水相体系(ATPS)研究了姜黄根茎中姜黄素[姜黄素(C21H20O6, CUR),去甲氧基姜黄素(C20H18O5, DMC),双去甲氧基姜黄素(C19H16O4, BDMC)]的提取工艺。通过中心复合设计确定了提取工艺的最佳条件为乙醇浓度13.6%,硫酸铵浓度33.2%,温度66.8℃。在此条件下,产率达到97.9%,抗氧化活性达到84.38%。通过测定系数(R2)、标准化标准差和平均相对误差,证实了实验数据与二级动力学模型吻合较好。
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引用次数: 0
Fabrication, characterization and corrosion inhibition properties of SCW-based ZnO nanofluids SCW基ZnO纳米流体的制备、表征及缓蚀性能
IF 2.5 4区 工程技术 Q2 Chemical Engineering Pub Date : 2023-08-23 DOI: 10.1080/00986445.2023.2249403
Mesut Ozdincer, S. Durmuş
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引用次数: 0
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