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Recent advances, challenges, and prospects of electrochemical water-splitting technologies for net-zero transition 电化学水分解技术的最新进展、挑战和展望
Cleaner Chemical Engineering Pub Date : 2023-10-13 DOI: 10.1016/j.clce.2023.100115
Hasan Ozcan , Rami S. El-Emam , Selahattin Celik , Bahman Amini Horri
{"title":"Recent advances, challenges, and prospects of electrochemical water-splitting technologies for net-zero transition","authors":"Hasan Ozcan ,&nbsp;Rami S. El-Emam ,&nbsp;Selahattin Celik ,&nbsp;Bahman Amini Horri","doi":"10.1016/j.clce.2023.100115","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100115","url":null,"abstract":"<div><p>This review paper presents state-of-the-art electrolytic-based hydrogen production technologies capable of helping to achieve the “net-zero” targets. It covers the recent advances in electrochemical water-splitting technologies, considering their maturity, durability, and operational aspects related to their near-term deployment. This paper aims to critically assess electrochemical technologies compatible with renewables, nuclear, or other clean energy sources with a high potential to be applied for green hydrogen production at scale. It also discusses the techno-economic aspects as well as the technological readiness of the potential carbon-free hydrogen production routes based on electrochemical approaches. With a comprehensive survey of the recent literature and extensive insight into current developments, the issues associated with deploying the electrolytic water splitting technologies are discussed, along with a review of their market readiness level to play a potential role in the transition journey from fossil fuel-based-economy into hydrogen-driven energy infrastructure. In addition, the paper provides insight into the legal strategies and the governmental incentives required to reach the so-called “net-zero” emission plans globally to enable green hydrogen for deep decarbonization of the industrial, transportation, and residential sectors. Near-term projects to deploy large-scale clean hydrogen production announced globally are also listed with their expected contribution toward the zero-emission targets. The result of this review shows that wind and solar photovoltaic energies, as the two most preferred renewable sources, can be used to drive Proton Exchange Membrane (PEM) and Alkaline Electrolysers (AE) at a cost range of USD 2 - 3 /kg of H<sub>2</sub>. This figure is expected to decrease by more than 40 % until 2030 if these electrolyzers can be deployed at a large scale.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"8 ","pages":"Article 100115"},"PeriodicalIF":0.0,"publicationDate":"2023-10-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49723170","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: 1
Evaluation of Yarrowia lipolytica potential for the biodegradation of poly(ethylene terephthalate) (PET) from mooring lines of Oil & Gas offshore platforms 石油和天然气海上平台系泊索中聚对苯二甲酸乙酯(PET)生物降解潜力的评价
Cleaner Chemical Engineering Pub Date : 2023-09-01 DOI: 10.1016/j.clce.2023.100109
Julio Cesar Soares Sales , Alanna Medeiros Botelho , Aparecida Selsiane Sousa Carvalho , Luan Giudicelli , Aline Machado de Castro , Bernardo Dias Ribeiro , Priscilla Filomena Fonseca Amaral , Maria Alice Zarur Coelho
{"title":"Evaluation of Yarrowia lipolytica potential for the biodegradation of poly(ethylene terephthalate) (PET) from mooring lines of Oil & Gas offshore platforms","authors":"Julio Cesar Soares Sales ,&nbsp;Alanna Medeiros Botelho ,&nbsp;Aparecida Selsiane Sousa Carvalho ,&nbsp;Luan Giudicelli ,&nbsp;Aline Machado de Castro ,&nbsp;Bernardo Dias Ribeiro ,&nbsp;Priscilla Filomena Fonseca Amaral ,&nbsp;Maria Alice Zarur Coelho","doi":"10.1016/j.clce.2023.100109","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100109","url":null,"abstract":"<div><p>Poly(ethylene terephthalate) (PET) is a widely used polyester with several applications, including offshore platforms and mooring lines of the Oil &amp; Gas industry. Due to the widespread use of PET and the growing concern about its environmental impact, biotechnology emerges as a potential solution to mitigate this problem. This work aims to evaluate, for the first time, the potential of <em>Y. lipolytica</em> IMUFRJ 50682 in the biodegradation of PET from waste mooring lines of Oil &amp; Gas offshore platforms. In this study, the biodegradation of PET from mooring lines by the yeast <em>Yarrowia lipolytica</em> was investigated through submerged cultivation or solid-state fermentation. After fermentation was complete, the biodegradation of PET sampled from the culture medium was evidenced by an increase in transmittance in areas related to the ester group detected through Attenuated Total Reflectance Fourier-Transform Infrared Spectroscopy (ATR-FTIR) for both culture strategies and all media tested. Besides, the crystallinity of PET increased by 79% and 72% after submerged cultivation using CSL-G + DMSO medium (2% corn steep liquor, 2% glycerol, and 5% Dimethyl sulfoxide) and after solid-state fermentation, respectively. Scanning electron microscopy revealed the formation of scratches and erosions on the polymer's surface after the microbial cultivation. The presence of PET monomer, terephthalic acid (TPA) (up to 142 µmol L <sup>−</sup> <sup>1</sup>), and some intermediates, such as bis(2-hydroxyethyl) terephthalate (BHET) and mono-(hydroxyethyl) terephthalate (MHET) in the medium after <em>Y. lipolytica</em> growth in the presence of PET proves that the polymer is being degraded. These results suggest a good biotechnological potential of <em>Y. lipolytica</em> for the depolymerization of PET from mooring lines.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"7 ","pages":"Article 100109"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49706272","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
Investigation of the corrosion inhibition performance of snail slime on the exposed surface of mild steel in acidic environment 酸性环境下蜗牛泥对低碳钢暴露表面缓蚀性能的研究
Cleaner Chemical Engineering Pub Date : 2023-09-01 DOI: 10.1016/j.clce.2023.100114
Ifeanyi Emmanuel Chukwunyere , Titus Chinedu Egbosiuba
{"title":"Investigation of the corrosion inhibition performance of snail slime on the exposed surface of mild steel in acidic environment","authors":"Ifeanyi Emmanuel Chukwunyere ,&nbsp;Titus Chinedu Egbosiuba","doi":"10.1016/j.clce.2023.100114","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100114","url":null,"abstract":"<div><p>Corrosion of metals is a major issue in various industries and the use of organic materials, especially plant extracts, as alternatives to toxic chemicals in corrosion inhibitors is gaining attention. However, the potential of animal products as corrosion inhibitors has not been fully explored. This study investigates the corrosion inhibiting potential of snail slime (SS) for mild steel in 0.5 M H<sub>2</sub>SO<sub>4</sub> solution using Gravimetric and electrochemical methods, including open circuit potential (OCP), potentiodynamic polarization (PDP), and electrochemical impedance spectroscopy (EIS). Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM) were used for material characterization. The results indicate that snail slime has a high inhibition efficiency of up to 92.75%, with inhibition efficiency decreasing as temperature and immersion time increase but it increased with higher inhibitor concentrations. Adsorption studies showed that snail slime exhibited strong adherence to the Langmuir and Temkin adsorption isotherms, indicating spontaneous adsorption on mild steel. The inhibition mechanism shows typical physical adsorption and follows first-order kinetics. While the EIS analysis indicated a charge transfer-controlled corrosion process with the highest inhibition efficiency of 81.74%, the PDP analysis revealed that snail slime acted as a mixed-type inhibitor with the highest inhibition efficiency of 81.98%. FTIR reveals the functional groups responsible for the inhibition exhibited by snail slime inhibitors, including C<img>H, O<img>H, C<img>O-O, C<img>Cl, and N<img>H. SEM shows that the inhibition of corrosion is due to the formation of an insoluble stable protective film on the sample surface by an adsorption process. These findings suggest that snail slime has significant potential as an eco-friendly alternative to synthetic corrosion inhibitors in industrial applications.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"7 ","pages":"Article 100114"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49706284","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: 1
Development of a novel, efficient and fast method for colorimetric detection of multiple Salmonella serovars based on aptamer-nanoparticle biosensor 基于适配体-纳米粒子生物传感器的多种沙门氏菌血清型比色检测新方法的建立
Cleaner Chemical Engineering Pub Date : 2023-09-01 DOI: 10.1016/j.clce.2023.100113
Verônica Wisineski Voltolini Neta , Alexsandra Valério , Karina Cesca , Vendelino Oenning Neto , Débora de Oliveira , Dachamir Hotza
{"title":"Development of a novel, efficient and fast method for colorimetric detection of multiple Salmonella serovars based on aptamer-nanoparticle biosensor","authors":"Verônica Wisineski Voltolini Neta ,&nbsp;Alexsandra Valério ,&nbsp;Karina Cesca ,&nbsp;Vendelino Oenning Neto ,&nbsp;Débora de Oliveira ,&nbsp;Dachamir Hotza","doi":"10.1016/j.clce.2023.100113","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100113","url":null,"abstract":"<div><p>In this research, the stability, specificity, and sensibility of a colorimetric detection method based on gold nanoparticles conjugated with aptamers for detection of <em>Salmonella enterica</em> serovar <em>Typhimurium</em> was investigated. The synthesis of gold nanoparticles by citrate reduction and conjugation with aptamers were studied to obtain high stability over time and to hinder inaccurate results. The reaction conducted at initial pH 5.0 and molar ratio 3.5:1 Na3Ct to HAuACl<sub>4</sub> produced stable, monodisperse and spherical particles, with a mean particle diameter of 18 nm. Gold nanoparticles showed stability upon salt exposure limited to 120 mmol/L, which was enhanced with aptamer conjugation to 700 mmol/L. Experiments with different microorganisms confirmed the biosensor specificity to <em>Salmonella</em>, with a detection limit of 10<sup>3</sup> CFU/mL for <em>S. Typhimurium,</em> as well as 10<sup>4</sup> CFU/mL for S. <em>minnesota</em>, S. <em>heidelberg</em>, and <em>Salmonella</em> spp. The assays carried out with artificially contaminated samples and environmental samples resulted in a detection time and detection limit identical to those obtained with pure samples. Results confirm that the biosensor synthesized is a great alternative for detection methods, making it possible to improve time and efficiency detection in the routine inspections as well as reduce costs.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"7 ","pages":"Article 100113"},"PeriodicalIF":0.0,"publicationDate":"2023-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49760742","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
Partial purification of crude lipase extract from Yarrowia lipolytica: Precipitation, aqueous two-phase systems (ATPS), and immobilization methods 解脂耶氏菌粗脂肪酶萃取物的部分纯化:沉淀法、水两相体系(ATPS)和固定化方法
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100105
Ana I.S. Brígida , Filipe S. Buarque , Vanessa L.R. Nogueira , Vânia M.M. Melo , Jose M. Guisán , Bernardo D. Ribeiro , Luciana R.B. Gonçalves , Maria A.Z. Coelho
{"title":"Partial purification of crude lipase extract from Yarrowia lipolytica: Precipitation, aqueous two-phase systems (ATPS), and immobilization methods","authors":"Ana I.S. Brígida ,&nbsp;Filipe S. Buarque ,&nbsp;Vanessa L.R. Nogueira ,&nbsp;Vânia M.M. Melo ,&nbsp;Jose M. Guisán ,&nbsp;Bernardo D. Ribeiro ,&nbsp;Luciana R.B. Gonçalves ,&nbsp;Maria A.Z. Coelho","doi":"10.1016/j.clce.2023.100105","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100105","url":null,"abstract":"<div><p>Efforts have been concentrated on developing alternative methods of enzyme purification that are less costly and highly efficient. In this work, we evaluated three different methods for lipase purification from Yarrowia lipolytica, such as precipitation using ammonium sulfate, ethanol, or acetone; aqueous two-phase systems (ATPS) based on polyethylene glycol (PEG) and potassium phosphate; and direct immobilization. It was impossible to obtain stable precipitates of the enzyme due to the low concentration of total protein and the presence of biosurfactant produced by the microorganism. Different mixture compositions were selected for the partitioning study. Three ATPS showed selective partitioning of the target enzymes, i.e., lipase and protease migrated to opposite phases. In the ATPS composed of 13 wt% PEG-4000 and 10 wt% salts, it was possible to achieve a purification factor for lipase of 4.2. Purification by immobilization performed by lipase-lipase interactions showed three lipases of distinct sizes in the crude extract. In the immobilization method by hydrophobic supports, phenyl-agarose and butyl‑agarose were more selective in immobilizing than octyl-agarose. In the ion exchange immobilization method, only the lipases identified at 66 kDa and 41 kDa have an attraction for DEAE-agarose (anionic) and sulfopropyl-agarose (cationic) matrices.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"6 ","pages":"Article 100105"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49706801","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: 2
Microstructure and mechanical performance of bamboo fiber reinforced mill-scale—Fly-ash based geopolymer mortars 竹纤维增强粉状粉煤灰基地聚合物砂浆的微观结构与力学性能
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100110
Roneh Glenn D. Libre Jr. , Julius L. Leaño Jr. , Luis Felipe Lopez , Carlo Joseph D. Cacanando , Michael Angelo B. Promentilla , Jason Maximino C. Ongpeng
{"title":"Microstructure and mechanical performance of bamboo fiber reinforced mill-scale—Fly-ash based geopolymer mortars","authors":"Roneh Glenn D. Libre Jr. ,&nbsp;Julius L. Leaño Jr. ,&nbsp;Luis Felipe Lopez ,&nbsp;Carlo Joseph D. Cacanando ,&nbsp;Michael Angelo B. Promentilla ,&nbsp;Jason Maximino C. Ongpeng","doi":"10.1016/j.clce.2023.100110","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100110","url":null,"abstract":"<div><p>Natural fiber reinforcement in cementitious matrices is being explored to provide an environment-friendly solution for lowering the overall carbon footprint of construction materials while giving the matrix much-needed tensile strength. Short bamboo fibers extracted from <em>Bambusa blumeana</em> or Kawayan tinik using 5% sodium hydroxide solution and treated with 10% aluminum sulfate solution are used to reinforce zero-cement geopolymer mortars. Bamboo fibers with varying lengths of 10 mm, 20 mm, and 30 mm are mixed with mill-scale – fly ash-based geopolymer in varying 0%, 0.5%, 1%, 1.5%, and 2% fiber loading per weight of specimen sample. Compressive strength and split tensile strength tests are administered to small cylinder samples, 50 mm in diameter by 100 mm in height, in accordance with ASTM C780. An optimum fiber length of 20 mm and fiber loading of 1.4% by weight is determined using Response Surface Methodology (RSM). The addition of bamboo fibers increased the unconfined compressive strength up to 292.41% compared to specimens without bamboo fibers. The split tensile strength also improved by up to a 355.82% increase compared to control samples. The corresponding high-strength and low-strength samples are also subjected to Fourier-transform Infrared Spectroscopy – Attenuated Total Reflectance (FTIR-ATR) to investigate and compare the stretching of bands between the raw materials and tested specimens. Scanning Electron Microscopy – Energy Dispersive X-Ray analysis (SEM-EDX) is used to show microscopic images and the elements present in the selected samples. The implications of the results on the material development of bamboo fiber-reinforced geopolymer mortar for construction are discussed.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"6 ","pages":"Article 100110"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49706979","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: 1
Extraction of methylcyclohexane−toluene mixture using imidazolium ionic liquids 咪唑离子液体萃取甲基环己烷-甲苯混合物
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100108
Elena Graczová , Dávid Molnár , Pavol Steltenpohl , Karel Řehák
{"title":"Extraction of methylcyclohexane−toluene mixture using imidazolium ionic liquids","authors":"Elena Graczová ,&nbsp;Dávid Molnár ,&nbsp;Pavol Steltenpohl ,&nbsp;Karel Řehák","doi":"10.1016/j.clce.2023.100108","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100108","url":null,"abstract":"<div><p>Separation of aromatics from non-aromatic hydrocarbons was exemplified assuming the liquid-phase extraction process for methylcyclohexane−toluene model mixture separation using the newly tested 1-ethyl-3-methylimidazolium bis(trifluoromethylsulfonyl)imide ([EMim][NTf<sub>2</sub>]) ionic liquid (IL). For this process a separation unit was proposed consisting of separation part represented by a counter-current extraction column and regeneration part including a vacuum evaporator and a vacuum distillation column. Separation of feed composed of 10 mole% of toluene in methylcyclohexane was considered in the designed separation unit. Designed separation efficiency of the unit was based on the following specifications: minimum methylcyclohexane and toluene content in the product streams of 99.5 mole% and the purity of regenerated extraction solvent recycled to the extraction column above 99 mole%.</p><p>Mathematical model of a counter-current extractor was compiled and its operation was simulated in the Matlab environment. In extractor simulations, proprietary phase equilibrium data were employed. Ternary liquid–liquid equilibrium (LLE) of the methylcyclohexane−toluene−[EMim][NTf<sub>2</sub>] system was estimated experimentally, from which the model parameters of the original NRTL equation were evauated and used for the ternary phase equilibrium description.</p><p>Aspen Plus was used to design a separation unit for the title hydrocarbons mixture separation, including the extraction solvent regeneration. Simulation of the proposed separation unit operation was focused not only on its separation efficiency but also on the evaluation of the unit energetic requirements.</p><p>Results of the unit design calculations (parameters of individual equipment, heat duties) obtained for the tested ionic liquid [EMim][NTf<sub>2</sub>] were confronted with the simulation results obtained for two ILs recommended in the literature for the non-aromatic–aromatic hydrocarbon mixture separation, namely 1‑butyl‑3-methylimidazolium tetracyanoborate [BMim][TCB] and 1-hexyl-3-methylimidazolium tetracyanoborate [HMim][TCB]. Based on the energetic analysis, the heat integration of the suggested separation unit was carried out for ionic liquid [HMim][TCB], which appeared to be the most efficient extraction solvent among those tested in this study, The heat integration resulted in about 71% reduction of the heat demand of the proposed separation unit.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"6 ","pages":"Article 100108"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49707013","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
Oil biodegradation studies with an immobilized bacterial consortium in plant biomass for the construction of bench-scale bioreactor 固定化菌群在植物生物质中降解油脂的实验研究
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100107
Rachel M. Ferreira , Bernardo D. Ribeiro , Danielle.M.A. Stapelfeldt , Rodrigo P. do Nascimento , Maria de.F.R. Moreira
{"title":"Oil biodegradation studies with an immobilized bacterial consortium in plant biomass for the construction of bench-scale bioreactor","authors":"Rachel M. Ferreira ,&nbsp;Bernardo D. Ribeiro ,&nbsp;Danielle.M.A. Stapelfeldt ,&nbsp;Rodrigo P. do Nascimento ,&nbsp;Maria de.F.R. Moreira","doi":"10.1016/j.clce.2023.100107","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100107","url":null,"abstract":"<div><p>Increasing exploration of natural sources and the development of new oil-derived technologies have caused environmental contamination. Thus, among the bioremediation strategies, biostimulation and bioaugmentation techniques have been the most used in the current literature. This study aimed to build a bench-scale bioreactor to promote degradation used ship engine lubricating oil using an immobilized bacterial consortium in <em>Salvinia</em> sp. (SS). For this purpose, bacterial strains were isolated from the hydrocarbon-contaminated moist soil in the marginal at Guanabara Bay, Rio de Janeiro, Brazil, followed by isolation, identification of microorganisms, and biodegradation tests. Then these microorganisms were immobilized in SS biomass. The bacterial consortium underwent biodegradation tests and bioreactor biodegradation on a bench scale. According to the results, the consortium of Bacteria like <em>Bacillus</em> could biodegrade 52.9% of the lubricating oil and 0.027 d <sup>−</sup> <sup>1</sup> degradation rate.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"6 ","pages":"Article 100107"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49707016","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
Enzymatic hydrolysis of carbohydrate-rich Chlorella vulgaris for third-generation bioethanol production by cellulase-recombinant yeast 纤维素酶重组酵母水解富含碳水化合物的小球藻生产第三代生物乙醇
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100111
Maria Augusta de Carvalho Silvello, Giovana Alves Gasparotto, Rosana Goldbeck
{"title":"Enzymatic hydrolysis of carbohydrate-rich Chlorella vulgaris for third-generation bioethanol production by cellulase-recombinant yeast","authors":"Maria Augusta de Carvalho Silvello,&nbsp;Giovana Alves Gasparotto,&nbsp;Rosana Goldbeck","doi":"10.1016/j.clce.2023.100111","DOIUrl":"https://doi.org/10.1016/j.clce.2023.100111","url":null,"abstract":"<div><p>This study developed a multienzyme preparation for the hydrolysis of microalgal biomass. Possible synergism between enzymes was investigated using carbohydrate-rich <em>Chlorella vulgaris</em> biomass. Under optimum experimental conditions, α-amylase (Termamyl®) at 0.05 g<sup>−1</sup> substrate and amyloglucosidase at 0.2 g<sup>−1</sup> substrate achieved a maximum reducing sugars yield of 5.639 ± 0.32 g L<sup>−1</sup> at a biomass loading of 10 g L<sup>−1</sup>. <em>Saccharomyces cerevisiae</em> JAYET cells modified with cellulase genes produced 8.015 g L<sup>−1</sup> ethanol from unenriched whole microalgal hydrolysate. With the developed enzyme preparation, no pretreatment was necessary to convert the carbohydrate-rich fraction of microalgal biomass into third-generation bioethanol.</p></div>","PeriodicalId":100251,"journal":{"name":"Cleaner Chemical Engineering","volume":"6 ","pages":"Article 100111"},"PeriodicalIF":0.0,"publicationDate":"2023-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49706954","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 review of the performance evaluation of thermoelectric nanostructure materials Bi2-xSbxTe3 (0.20≤X≤1.80) 热电纳米结构材料Bi2-xSbxTe3(0.20≤X≤1.80)性能评价综述
Cleaner Chemical Engineering Pub Date : 2023-06-01 DOI: 10.1016/j.clce.2023.100101
Hayati Mamur , Mehmet Ali Üstüner , Haluk Korucu , Mohammad Ruhul Amin Bhuiyan
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引用次数: 3
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