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Rapid synthesis of copper nanoparticles using Nepeta cataria leaves: An eco-friendly management of disease-causing vectors and bacterial pathogens 利用卡塔叶快速合成铜纳米颗粒:对致病媒介和细菌病原体的环保管理
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0022
M. Mani, Aruna Sharmili Sundararaj, K. Al-Ghanim, Shiny Punalur John, K. Elumalai, M. Nicoletti, M. Govindarajan
Abstract Insecticides kill mosquitoes but damage other animals including humans. Eco-friendly metal nanoparticles may be a plant-based pesticide for vector control. Here, the copper nanoparticles (Cu NPs) synthesized from Nepeta catarialeaves have been investigated for their antibacterial and larvicidal properties. Fourier transforms infrared spectroscopy demonstrated that biochemicals reduced and stabilized nanoparticles by shifting peaks from 1,049 to 1,492 cm−1, and ultraviolet–visible spectrometry proved that produced Cu NPs had a peak at 550 nm. Transmission electron microscopic and scanning electron microscope showed that the particles are spherical and 23–29 nm in size. X-ray diffraction analysis shows that Cu NPs are crystalline. At a 100 µg·mL−1 concentration, Cu NPs exhibited a higher percentage of inhibition in the order of Escherichia coli ≫ Enterococcus faecalis ≫ Staphylococcus aureus. The lethal concentration (LC50) of the Cu NPs against the larvae of Aedes aegypti, Anopheles stephensi, and Culex quinquefasciatus was determined to be 60.63, 56.58, and 54.32 µg·mL−1, respectively. This ground-breaking study describes the biological production of Cu NPs utilizing N. cataria leaf extract for the first time. Based on these findings, the bio-synthesized Cu NPs and the aqueous extract of N. cataria may provide a potential alternative method for managing these vector populations. Graphical abstract
摘要杀虫剂杀死蚊子,但会伤害包括人类在内的其他动物。环保金属纳米颗粒可能是一种用于病媒控制的植物杀虫剂。本文研究了由荆芥叶合成的铜纳米粒子(Cu-NPs)的抗菌和杀幼虫性能。傅立叶变换红外光谱表明,生物化学物质通过将峰值从1049移动到1492来还原和稳定纳米颗粒 cm−1,紫外-可见光谱法证明产生的Cu NP在550处具有峰值 nm。透射电子显微镜和扫描电子显微镜显示,颗粒为球形,23–29 纳米大小。X射线衍射分析表明Cu NPs是结晶的。在100 μg·mL−1浓度下,Cu NPs表现出更高的抑制率,其顺序为大肠杆菌、粪肠球菌、金黄色葡萄球菌。Cu NPs对埃及伊蚊、斯氏按蚊和致倦库蚊幼虫的致死浓度(LC50)分别为60.63、56.58和54.32 µg·mL−1。这项突破性的研究首次描述了利用卡塔叶提取物生物生产铜纳米粒子。基于这些发现,生物合成的Cu NPs和卡塔菌的水提取物可能为管理这些媒介种群提供一种潜在的替代方法。图形摘要
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引用次数: 1
Geranium leaf-mediated synthesis of silver nanoparticles and their transcriptomic effects on Candida albicans 天竺葵叶介导的纳米银合成及其对白色念珠菌的转录组效应
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8105
P. Serrano-Díaz, D. Williams, J. Vega-Arreguín, Ravichandran Manisekaran, Joshua A. Twigg, Daniel Morse, R. García-Contreras, M. C. Arenas-Arrocena, L. Acosta-Torres
Abstract Candida albicans is the most predominant fungal species isolated from medical devices, including catheters, heart valves, and dental prostheses. In recent years, it has been demonstrated to be resistant to many antifungals; therefore, silver nanoparticles (AgNPs) have been proposed as an alternative. But only a handful of research is contributed to omic-based studies to study the various impacts of AgNPs on Candida species and other microorganisms. Thus, the study aims to biosynthesize AgNPs using Pelargonium-hortorum leaf and test its antifungal, cytotoxicity, and global gene expression on Candida through transcriptomic profiling. The leaf-assisted AgNPs resulted in spherical shapes with a particle size of 38 nm. The anticandidal effect demonstrated that the Minimum inhibitory concentration was 25 μg·mL−1. Later, the cytotoxicity assay reported a moderate impact on the human gingival fibroblast cells. Finally, the transcriptomic analysis demonstrated the differential gene expression of 3,871 upregulated and 3,902 downregulated genes. Thus, proving the anticandidal effect of AgNPs on Candida through RNA-seq experiments and the regulated genes is highly important to cell wall integrity, adherence, and virulence.
摘要白色念珠菌是从医疗器械中分离出来的最主要的真菌,包括导管、心脏瓣膜和假牙。近年来,它已被证明对许多抗真菌药物具有耐药性;因此,银纳米粒子(AgNPs)已被提议作为一种替代方案。但只有少数研究参与了基于组学的研究,以研究AgNPs对念珠菌和其他微生物的各种影响。因此,本研究旨在利用短叶天竺葵叶生物合成AgNPs,并通过转录组学分析测试其对念珠菌的抗真菌、细胞毒性和全局基因表达。叶片辅助的AgNPs形成了粒径为38的球形 nm。抗癌作用表明,最小抑制浓度为25 μg·mL−1。随后,细胞毒性试验报告对人牙龈成纤维细胞有中度影响。最后,转录组学分析显示3871个上调基因和3902个下调基因的差异基因表达。因此,通过RNA-seq实验和调控基因证明AgNPs对念珠菌的抗癌作用对细胞壁完整性、粘附性和毒力非常重要。
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引用次数: 2
A thermo-tolerant cellulase enzyme produced by Bacillus amyloliquefaciens M7, an insight into synthesis, optimization, characterization, and bio-polishing activity 一种由解淀粉芽孢杆菌M7产生的耐热纤维素酶,对合成、优化、表征和生物抛光活性的深入研究
4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0127
Amr Fouda, Khalid Sulaiman Alshallash, Hossam Mohamed Atta, Mamdouh Salem El-Gamal, Mohamed Mostafa Bakry, Mohammed Ibrahim Alghonaim, Salem Salah Salem
Abstract In the current study, among 36 isolates, the bacterial strain M7 was selected as the highest cellulase producer and underwent traditional and molecular identification as Bacillus amyloliquefaciens M7. The productivity of the cellulase enzyme was optimized using the one-factor-at-a-time method. The optimization analysis showed that the best pH value for cellulase production was 7, in the presence of 1% bacterial inoculum size, 5 g·L −1 of carboxymethyl cellulose, 5 g·L −1 of peptone as nitrogen source, and incubation period of 24 h at a temperature of 35°C. The highest cellulase activity (64.98 U·mL −1 ) was obtained after optimizing conditions using BOX-Behnken Design. The maximum cellulase yield (75.53%) was obtained after precipitation by 60% ammonium sulfate, followed by purification by dialysis bag and Sephadex G-100 column chromatography. The purified cellulase enzyme was characterized by 6.38-fold enrichment, with specific activity (60.54 U·mg −1 ), and molecular weight of approximately 439.0 Da. The constituent of purified cellulase was 18 amino acids with high concentrations of 200 and 160 mg·L −1 for glycine and arginine, respectively. The purified cellulase enzyme was more stable and active at pH 8 and an incubation temperature of 50°C. The metal ions CaCl 2 , NaCl, and ZnO enhanced the activity of purified cellulase enzyme. Finally, the B. amyloliquefaciens M7-cellulase exhibits high bio-polishing activity of cotton fabrics with low weight loss (4.3%) which was attained at a maximum concentration (1%, v/v) for 90 min.
摘要本研究在36株分离菌株中,选择M7菌株作为纤维素酶产量最高的菌株,对其进行传统分子鉴定为解淀粉芽孢杆菌M7。采用单因子法优化纤维素酶的产率。优化分析表明,在细菌接种量为1%、羧甲基纤维素用量为5 g·L−1、蛋白胨用量为5 g·L−1的条件下,产酶的最佳pH值为7,培养时间为24 h,温度为35℃。采用BOX-Behnken设计优化条件后,获得最高的纤维素酶活性(64.98 U·mL−1)。经60%硫酸铵沉淀,透析袋纯化,Sephadex G-100柱层析,纤维素酶得率最高,为75.53%。纯化后的纤维素酶富集6.38倍,比活性为60.54 U·mg−1,分子量约为439.0 Da。纯化后的纤维素酶由18个氨基酸组成,其中甘氨酸和精氨酸的浓度分别为200和160 mg·L−1。纯化后的纤维素酶在pH为8、培养温度为50℃时具有较高的稳定性和活性。氯化钠、氯化钠和氧化锌等金属离子增强了纯化纤维素酶的活性。最后,解淀粉芽孢杆菌m7纤维素酶对棉织物的生物抛光活性高,失重率低(4.3%),最大浓度(1%,v/v)为90 min。
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引用次数: 0
An efficient and green synthesis of 2-phenylquinazolin-4(3H)-ones via t-BuONa-mediated oxidative condensation of 2-aminobenzamides and benzyl alcohols under solvent- and transition metal-free conditions 在无溶剂和过渡金属的条件下,通过t- buna介导2-氨基苯酰胺和苯甲醇的氧化缩合,高效、绿色地合成2-苯基喹唑啉-4(3H)- 1
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8148
Vy Nguyen, D. P. Tran, T. Nguyen, K. Nguyen, H. Le
Abstract Quinazolinone synthesis usually requires employing sensitive substrates, hazardous solvents, large excess oxidants, and expensive catalysts. In this study, an efficient and environmentally benign pathway was developed to synthesize 2-phenylquinazolin-4(3H)-one via oxidative coupling between commercially available and stable chemicals, including 2-aminobenzamide and benzyl alcohol without toxic oxidizing agents and transition-metal catalysts. A high yield of the desired product (up to 84%) was obtained at 120°C for 24 h in the presence of oxygen as a green oxidant and t-BuONa as a base. Importantly, the study scope was expanded toward successfully producing various 2-phenylquinazolin-4(3H)-one derivatives in moderate-to-good yields. Furthermore, control experiments proposed that the conversion involved the initial partial oxidation of benzyl alcohol to the benzaldehyde intermediate under basic conditions, followed by the condensation, intramolecular nucleophilic addition, and oxidative dehydrogenation to 2-phenylquinazolin-4(3H)-one.
摘要喹唑啉酮的合成通常需要使用敏感的底物、危险的溶剂、大量过量的氧化剂和昂贵的催化剂。在本研究中,开发了一种有效且环保的途径,通过市售和稳定的化学品(包括2-氨基苯甲酰胺和苯甲醇)之间的氧化偶联合成2-苯基喹唑啉-4(3H)-酮,而无需有毒氧化剂和过渡金属催化剂。在120°C下24小时内获得所需产物的高产率(高达84%) h,在作为绿色氧化剂的氧和作为碱的t-BuONa的存在下。重要的是,研究范围扩大到以中等至良好的产率成功生产各种2-苯基喹唑啉-4(3H)-酮衍生物。此外,对照实验表明,转化包括在碱性条件下苯甲醇初始部分氧化为苯甲醛中间体,然后缩合、分子内亲核加成和氧化脱氢为2-苯基喹唑啉-4(3H)-酮。
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引用次数: 0
Micro-impact-induced mechano-chemical synthesis of organic precursors from FeC/FeN and carbonates/nitrates in water and its extension to nucleobases 微冲击诱导FeC/FeN和碳酸盐/硝酸盐有机前驱体的机械化学合成及其向核碱基的延伸
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2023-0020
K. Kugimiya, Kenji Asai, T. Harada, Y. Furukawa, M. Naito
Abstract Much effort was taken to elucidate how organic precursors appeared in early Earth, and attention was paid to two impact experiments: hypervelocity impacts by a propellant gun which simulated meteorite collides to Earth forming fatty acids and amino acids from inorganics, and micro-impacts by a planetary ball-mill which formed ammonium and acetic acid from inorganics. Our extended study on micro-impacts showed the formation of carboxylic acids, amines, and amino acids from Fe3C/Fe4N, carbon, and carbonates/nitrates by milling up to 30 h at 40 G. Fe(CO2)2·2H2O accelerated the formation a step further. Cu addition caused superior capability to form amines and amino acids. Two reaction fields were disclosed. In the impact field, the hydration of ferrous materials generated hydrogen which hydrogenated inorganic carbons to organics and ferrous transient materials and, in the maturing field, hydrogenated materials were then transformed into complex organics. Iron and CO2 were presumably the key components in the Hadean Ocean. Discussions on the mechano-chemical reaction were extended to serpentinization coupled with diastrophism of oceanic crusts and further led to a depiction that organic precursors were formed by micro-impacts and frictions of rocks and sands (like milling-balls) due to tremors in crusts. It provides a new path on how organic precursors were formed on the aqua-planet Earth.
摘要:为了阐明地球早期有机前体的形成过程,本文着重进行了两个撞击实验:模拟陨石撞击地球产生无机物形成脂肪酸和氨基酸的推进剂枪的超高速撞击实验,以及模拟无机物形成铵和乙酸的行星球磨机的微撞击实验。我们对微冲击的扩展研究表明,在40 G下研磨30小时后,由Fe3C/Fe4N、碳和碳酸盐/硝酸盐形成羧酸、胺和氨基酸。Fe(CO2)2·2H2O进一步加速了形成。Cu的加入使其形成胺和氨基酸的能力更强。公开了两个反应场。在冲击场中,含铁材料水化产生氢,将无机碳氢化为有机物和含铁瞬态材料;在成熟场中,氢化后的材料转化为复杂有机物。铁和二氧化碳可能是冥古宙海洋的关键成分。对机械化学反应的讨论扩展到蛇纹石化和海洋地壳的地壳变形作用,并进一步提出了有机前体是由地壳震动引起的岩石和沙子的微冲击和摩擦(如磨球)形成的。它为研究有机前体如何在水行星地球上形成提供了一条新的途径。
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引用次数: 0
Transformation of eggshell waste to egg white protein solution, calcium chloride dihydrate, and eggshell membrane powder 蛋壳废弃物转化为蛋清蛋白溶液、二水氯化钙和蛋壳膜粉
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8151
I. Strelec, Marta Ostojčić, Mirna Brekalo, S. Hajra, Hoe-Joon Kim, J. Stanojev, Nikola Maravić, S. Budžaki
Abstract The present study investigated the possibility of complete utilization of eggshell waste (ESW) transforming it to adherent egg white protein solution, calcium chloride dihydrate, and eggshell membranes (ESM). Adherent egg white protein solution was obtained by washing ESW three times with distilled water at 25°C, followed by filtration, and analyzed for the protein content and lysozyme activity. ESM and calcium chloride were obtained simultaneously by the exposure of washed eggshells to 5% hydrochloric acid treatment at 25°C for 3 h, followed by separation by filtration. The separated ESM were washed, dried, and milled to powder and analyzed for protein and lipid content. The calcium chloride solution was exposed to the neutralization of excess hydrochloric acid by calcium hydroxide, followed by evaporation to one-tenth of volume. Calcium chloride crystals were precipitated from the concentrated solution with acetone, separated by filtration, dried at 110°C, and analyzed for chemical composition and purity. The obtained results revealed that 100 g of ESW can be transformed to 1.61 ± 0.34 g of adherent white proteins containing 485,821 U of lysozyme activity, 2.84 ± 0.16 g of ESM powder, and 108.74 ± 3.62 g of calcium chloride dihydrate of high purity.
摘要本研究探讨了蛋壳废物(ESW)完全利用的可能性,将其转化为粘附的蛋清蛋白溶液、二水合氯化钙和蛋壳膜(ESM)。用蒸馏水在25℃下洗涤三次得到附着的蛋清蛋白溶液,然后过滤,分析蛋白质含量和溶菌酶活性。将洗净的蛋壳置于5%盐酸中,25℃下处理3 h,同时得到ESM和氯化钙,然后过滤分离。分离的ESM洗涤,干燥,研磨成粉末,分析蛋白质和脂肪含量。氯化钙溶液用氢氧化钙中和过量的盐酸,然后蒸发至体积的十分之一。用丙酮从浓溶液中沉淀氯化钙晶体,过滤分离,在110℃下干燥,分析化学成分和纯度。结果表明,100 g ESW可转化为1.61±0.34 g溶菌酶活性为485,821 U的贴壁白色蛋白,2.84±0.16 g ESM粉末和108.74±3.62 g高纯度氯化钙二水合物。
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引用次数: 1
Green nanoarchitectonics of the silver nanocrystal potential for treating malaria and their cytotoxic effects on the kidney Vero cell line 治疗疟疾的银纳米晶体的绿色纳米结构及其对肾Vero细胞系的细胞毒性作用
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8111
A. Shater, Fayez M. Saleh, Zuhair M. Mohammedsaleh, H. Gattan, Bassam M. Al-ahmadi, N. Saeedi, M. Jalal, C. Panneerselvam
Abstract This study focused on testing manufactured silver nanoparticles (AgNPs) against the malaria pathogen Plasmodium falciparum and the malaria vector Anopheles stephensi using the plant filtrate from Madhuca longifolia. The M. longifolia leaf extracts were used to synthesize the AgNPs, which were then subjected to several physicochemical methods to determine their characteristics. To evaluate the effectiveness of the green produced AgNP therapy, the mosquitocidal activity of A. stephensi, cytotoxicity assay in Vero cells, and antiplasmodial activity assay were performed. The larval and pupal toxicity of biosynthesized AgNPs against the malarial vector A. stephensi is 90% promising in laboratory settings at low dosages (10 ppm). When tested on African green monkey kidney cells, the cytotoxic effect of biosynthesized materials was found to be inappropriately damaging up to 100 g·mL−1. The antimalarial efficacy of AgNPs was evaluated against P. falciparum strains. The parasites that were restrained by AgNPs at 100 ppm had the highest parasitemia restraint rate (80.4%). AgNPs then showed significant in vitro antimalarial activity against P. falciparum. Our findings suggested that the biosynthesized AgNPs might function as a novel antimalarial agent that is both safer for the environment and a barrier to infections spread by mosquitoes. Graphical abstract Illustration of AgNP synthesis in the fight against malaria.
摘要本研究重点测试了制造的银纳米颗粒(AgNPs)对疟疾病原体恶性疟原虫和疟疾媒介斯氏按蚊的抗药性,使用的是长叶马杜卡的植物滤液。用长叶M.longifolia叶提取物合成AgNPs,然后用几种物理化学方法测定其特性。为了评估绿色产生的AgNP治疗的有效性,进行了A.stephensi的杀蚊活性、Vero细胞的细胞毒性测定和抗疟原虫活性测定。生物合成的AgNPs对疟疾媒介斯氏疟原虫的幼虫和蛹毒性在低剂量的实验室环境中是90%有希望的(10 ppm)。当在非洲绿猴肾细胞上进行测试时,发现生物合成材料的细胞毒性效应不适当地破坏了多达100 g·mL−1。评价了AgNPs对恶性疟原虫株的抗疟作用。在100 ppm对疟原虫的抑制率最高(80.4%),AgNPs对恶性疟原虫具有显著的体外抗疟活性。我们的研究结果表明,生物合成的AgNPs可能是一种新型抗疟剂,对环境更安全,也是蚊子传播感染的屏障。AgNP合成在对抗疟疾中的图解。
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引用次数: 1
Quality of oil extracted by cold press from Nigella sativa seeds incorporated with rosemary extracts and pretreated by microwaves 用冷压榨法从黑草种子中提取精油,并加入迷迭香提取物,用微波预处理
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8149
Ali Ashrafi, S. Azadmard‐Damirchi, J. Hesari
Abstract Black cumin (Nigella sativa) seed (BS) oil has high a peroxide value (PV) and acid value (AV). In this study, BS was incorporated with different levels of rosemary extracts as a natural antioxidant source before and after pretreatment by microwaves. Based on the oil extraction yield (33%), PV (8.4 meq O2 per kg oil), and AV (3.2 mg KOH per gram oil), the optimum condition was determined as microwave radiation for 120 s and, after that, moisturizing by the extract at 4% level. AV and PV were lower, and chlorophylls, carotenoids, polyphenols, thymoquinone, and tocopherols content were higher in oil extracted from pretreated BS than oil extracted from control BS. Reduction and loss of bioactive components occurred in oil samples during the 120 days of storage; however, it was higher in the control sample. There were no significant differences (p < 0.05) in the fatty acid composition of oil samples; however, oxidation and reduction of linoleic acid in the control oil sample were higher (4.2%) than the oil extracted from pretreated BS (2.5%). In conclusion, the oil extracted from the pretreated BS had higher oil extraction yield, high bioactive components, and stability; therefore, microwave radiation and incorporation of rosemary extract before oil extraction from BS is suggested.
摘要黑孜然籽油具有较高的过氧化值(PV)和酸值(AV)。在本研究中,BS在微波预处理前后加入不同水平的迷迭香提取物作为天然抗氧化剂。基于采油产量(33%),PV(8.4 meq O2/kg油)和AV(3.2 mg KOH/g油),确定最佳条件为微波辐射120 s,然后用4%的提取物保湿。预处理BS提取的油中的AV和PV较低,叶绿素、类胡萝卜素、多酚、胸腺醌和生育酚含量高于对照BS提取的石油。在储存的120天内,石油样品中的生物活性成分减少和损失;然而,在对照样品中它更高。油样的脂肪酸组成无显著差异(p<0.05);但对照油样品中亚油酸的氧化还原率(4.2%)高于预处理BS提取的油(2.5%);因此,建议在从BS中提取油之前进行微波辐射并掺入迷迭香提取物。
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引用次数: 2
Exergy analysis of a conceptual CO2 capture process with an amine-based DES 胺基DES概念CO2捕获过程的火用分析
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8085
Emad Ali, M. Hadj-Kali, S. Mokraoui, R. Khan, Meshal Aldawsari, M. Boumaza
Abstract The energy efficiency of an absorption–desorption system for carbon dioxide capture from flue gas utilizing methyltriphenylphosphonium bromide-monoethanolamine (MEA) deep eutectic solvent is investigated in this article. According to the results, when the working pressure of the absorber column increases, the process becomes significantly exergy deficient, with an exergy loss of 7.63 MW compared to 5.7 MW for a normal MEA process. The majority of the exergy deficit is due to flue gas compression effort, which accounts for 99% of the total process exergy. The process’s exergy shortfall can be improved by lowering the absorber pressure from 10 to 3 atm, lowering the carbon dioxide removal efficiency from 90% to 60%, and increasing the solvent-to-gas ratio from 075 to 7.05. Furthermore, the incorporation of an energy recovery device could allow for an 80–90% reduction in the energy consumed by the gas compressor when running at 10 atm, from 5.7 to 1.2 MJ‧kg CO2 −1. With this adjustment, the deep eutectic solvent-based process can match or outperform the corresponding aqueous alkanolamine solvent-based process in terms of exergy destruction and specific energy consumption.
摘要本文研究了利用甲基三苯基溴化鏻单乙醇胺(MEA)深共晶溶剂从烟气中捕获二氧化碳的吸收-解吸系统的能量效率。结果表明,当吸收塔的工作压力增加时,该过程变得明显的火用不足,火用损失为7.63 MW与5.7相比 MW用于正常MEA工艺。大部分(火用)不足是由于烟气压缩作用造成的,烟气压缩作用占整个过程火用的99%。该工艺的火用不足可以通过将吸收器压力从10降低到3来改善 atm,将二氧化碳去除效率从90%降低到60%,并将溶剂与气体的比率从075提高到7.05。此外,能量回收装置的结合可以使气体压缩机在10℃运行时消耗的能量减少80-90% 大气压,从5.7到1.2 MJ·kg二氧化碳−1。通过这种调整,深度共晶溶剂基工艺在火用破坏和比能耗方面可以与相应的水性链烷醇胺溶剂基工艺相匹配或优于该工艺。
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引用次数: 0
Phosphorus removal by iron–carbon microelectrolysis: A new way to achieve phosphorus recovery 铁碳微电解除磷:一种实现磷回收的新途径
IF 4.3 4区 工程技术 Q2 CHEMISTRY, MULTIDISCIPLINARY Pub Date : 2023-01-01 DOI: 10.1515/gps-2022-8120
Chao Wang, Chang-Geun Wang, Mei Xu, Fanke Zhang
Abstract Iron–carbon microelectrolysis was employed to remove phosphorus in this study. The efficiency, mechanism, influence factors, and feasibility of actual wastewater were investigated. The results showed that iron–carbon microelectrolysis had an excellent phosphorus removal ability. When the initial concentration of PO 4 3 − {text{PO}}_{4}^{3-} –P was 19.44 mg·L−1, after 120 min reaction time, the remaining PO 4 3 − {text{PO}}_{4}^{3-} –P in wastewater was 4.65 mg·L−1, and the removal rate was 76.05%. The precipitate formed in the reaction was mainly ferric phosphate (FePO4), which had a high recovery value. There was a linear correlation between initial phosphorus concentrations and phosphorus removal velocity. As to actual wastewater, 88.37 ± 0.44%, 89.78 ± 1.88%, and 94.23 ± 0.16% phosphorus removal rates were achieved in the influent of municipal wastewater treatment plant, effluent of secondary sedimentation tank, and actual high salinity wastewater, respectively, after 120 min reaction time. This study provides a new method for phosphorus removal and recovery from wastewater. Graphical abstract Iron–carbon microelectrolysis has an excellent phosphorus removal ability. The precipitate formed in the reaction was mainly ferric phosphate (FePO4) which had a high recovery value.
摘要本研究采用铁碳微电解法去除磷。对实际废水的处理效率、机理、影响因素及可行性进行了探讨。结果表明,铁碳微电解具有良好的除磷能力。当PO 4.3−{text{PO}}_{4}^{3-} - p初始浓度为19.44 mg·L−1时,反应时间120 min后,废水中剩余PO 4.3−{text{PO}}_{4}^{3-} - p为4.65 mg·L−1,去除率为76.05%。反应生成的沉淀物主要为磷酸铁(FePO4),具有较高的回收价值。初始磷浓度与除磷速度呈线性相关。在实际废水中,经过120 min的反应时间,城市污水处理厂进水、二沉池出水和实际高盐度废水的除磷率分别为88.37±0.44%、89.78±1.88%和94.23±0.16%。本研究为废水除磷和回收提供了一种新的方法。铁碳微电解具有优异的除磷能力。反应生成的沉淀物主要为磷酸铁(FePO4),具有较高的回收率。
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引用次数: 0
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