Algal Research-Biomass Biofuels and Bioproducts最新文献_第2页

Multivariate optimization of selective pressurized liquid extraction for bioactive all-trans fucoxanthin and its isomers from Undaria pinnatifida 裙带菜中生物活性全反式岩藻黄素及其异构体的多因素优选

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-10-01 DOI: 10.1016/j.algal.2025.104336

Paula Garcia-Oliveira , Jesus Simal-Gandara , Lucía Cassani

{"title":"Multivariate optimization of selective pressurized liquid extraction for bioactive all-trans fucoxanthin and its isomers from Undaria pinnatifida","authors":"Paula Garcia-Oliveira , Jesus Simal-Gandara , Lucía Cassani","doi":"10.1016/j.algal.2025.104336","DOIUrl":"10.1016/j.algal.2025.104336","url":null,"abstract":"<div><div>This study aimed to develop an efficient and sustainable method to recover both all-<em>trans</em> fucoxanthin (FX) and its <em>cis</em> isomers from <em>Undaria pinnatifida</em> (UP). Pressurized liquid extraction (PLE) conditions (time, temperature, and ethanol in ethyl acetate) were optimized using multivariate analysis to maximize FX yield. Temperature notably influenced extraction, with <em>cis</em> and <em>trans</em> isomers showing similar thermal stability. Ethyl acetate showed higher selectivity than ethanol for isolating FX isomers. The optimal PLE conditions were: 115 °C, 100 % ethyl acetate, and 1 min. The recovery of FX isomers was further enhanced by performing three extraction cycles, resulting in a twofold increase in all-<em>trans</em> and <em>cis</em> isomers. The FX-rich extract showed antioxidant capacity, anti-inflammatory properties, and potent anticancer effects against lung carcinoma NCI-H460 and breast adenocarcinoma MCF-7 cell lines. To our knowledge, this is the first systematic evaluation of <em>cis</em>-FX extraction from UP using PLE. Overall, this study provides an innovative, standardized approach for selectively extracting bioactive FX isomers, unlocking their health potential and advancing sustainable valorization of brown algae.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104336"},"PeriodicalIF":4.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216378","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Online monitoring system for microalgal bioprocesses: Model-based quantification of photosynthetic activity using pulse amplitude modulation fluorometry and rapid light curves 微藻生物过程在线监测系统：利用脉冲幅度调制荧光法和快速光曲线对光合活性进行基于模型的量化

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-10-01 DOI: 10.1016/j.algal.2025.104230

Lucas Ringleben , Michael Pfaff

{"title":"Online monitoring system for microalgal bioprocesses: Model-based quantification of photosynthetic activity using pulse amplitude modulation fluorometry and rapid light curves","authors":"Lucas Ringleben , Michael Pfaff","doi":"10.1016/j.algal.2025.104230","DOIUrl":"10.1016/j.algal.2025.104230","url":null,"abstract":"<div><div>Microalgae biotechnology has significant potential, particularly with respect to circular bioeconomy and biorefinery concepts. To fully exploit this potential, efficient bioprocessing strategies are required in order to achieve high product yields. In this context, microalgal bioprocess monitoring is crucial to ensure an efficient microalgal cultivation and in turn achieve higher productivity. This study focuses on the design, construction, automation, experimental testing and implementation of an online monitoring system based on a pulse amplitude modulation (PAM) fluorometer using rapid light curves (RLCs) for model-based quantification of microalgal photosynthetic activity as an indicator of biomass quality. The first step was to design and construct a flow-through cell including its mounting to ensure reproducible measurements. Next, a protocol was programmed to automate the measurement procedure and allow online monitoring of microalgae cultivations in photobioreactors. The system was then tested using the microalga <em>Microchloropsis salina</em> at optical densities ranging from about 1 to 23 corresponding to biomass concentrations from about 0.25 to 5.00 g L<sup>−1</sup>. At distinct concentrations within this range, RLCs were determined and mathematical models describing light limitation and inhibition of the photosynthetic system were applied to the data in order to identify RLC model parameters and to determine the most appropriate models. Finally, the system was implemented via its bypass in a photobioreactor operating in batch and turbidostatic mode, with the RLC model parameters monitored online. As a major result, the study showed that pH stress can be detected by RLC model parameters shifts. Overall, the study demonstrated the system's capability to monitor photosynthetic activity online, offering valuable applications in microalgal biotechnology and bioprocess engineering.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104230"},"PeriodicalIF":4.5,"publicationDate":"2025-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216495","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Microwave-assisted pyrolysis of Spirulina platensis with activated carbon as absorber: Product yield dynamics and fuel properties 以活性炭为吸收体的平螺旋藻微波辅助热解：产物产率动态及燃料特性

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-24 DOI: 10.1016/j.algal.2025.104329

Joshua Earl I. Fung, Rowena B. Carpio, Jewel A. Capunitan, Monet Concepcion M. Detras

{"title":"Microwave-assisted pyrolysis of Spirulina platensis with activated carbon as absorber: Product yield dynamics and fuel properties","authors":"Joshua Earl I. Fung, Rowena B. Carpio, Jewel A. Capunitan, Monet Concepcion M. Detras","doi":"10.1016/j.algal.2025.104329","DOIUrl":"10.1016/j.algal.2025.104329","url":null,"abstract":"<div><div>This study investigates the microwave-assisted pyrolysis (MAP) of <em>Spirulina platensis</em> using activated carbon as a microwave absorber, focusing on the effects of microwave power and exposure time on product yields and characteristics. The maximum bio-oil yield (14.42 % ± 0.335 %) was obtained at 600 W for 10 min, and the highest biochar yield (49.39 % ± 1.09 %) at 450 W for 5 min. Statistical analysis confirmed significant main and interaction effects influencing the product yield distribution. The resulting bio-oil and biochar exhibited HHVs of 29.89 MJ/kg and 23.92 MJ/kg, respectively, with corresponding energy recoveries of 19.70 % and 54.01 %, respectively. However, energy consumption ratio indicated that, under the tested conditions, MAP was not energetically favorable when evaluated solely on the basis of biochar and bio-oil. The biochar displayed energy characteristics similar to sub-bituminous coal. FTIR analysis revealed functional groups relevant to fuel chemistry, while fuel property estimates predicted that the bio-oil met EN 14214 and ASTM <span><span>D6751</span><svg><path></path></svg></span> standards for iodine value, cetane number, and kinematic viscosity. GC–MS profiling showed a highly polyunsaturated fatty acid content of the bio-oil. These results highlight the potential of <em>S. platensis</em>-derived bio-oil and biochar as sustainable alternatives to conventional fuels and valuable bioproducts.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104329"},"PeriodicalIF":4.5,"publicationDate":"2025-09-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154763","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Innovative strategies for enhancing microalgae-based biohydrogen production: A review 加强微藻生物制氢的创新策略综述

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-23 DOI: 10.1016/j.algal.2025.104325

Kyle John Pillay, Neeraj Kumar Singh, Santhosh Pillai

{"title":"Innovative strategies for enhancing microalgae-based biohydrogen production: A review","authors":"Kyle John Pillay, Neeraj Kumar Singh, Santhosh Pillai","doi":"10.1016/j.algal.2025.104325","DOIUrl":"10.1016/j.algal.2025.104325","url":null,"abstract":"<div><div>Microalgae are a promising renewable feedstock for sustainable biohydrogen (bio<img>H<sub>2</sub>) production due to their high growth rates, carbon fixation ability, growth adaptivity to various aquatic environments, low nutritional requirements, and minimal land use. However, low hydrogen yields and high production costs remain major challenges to their commercial viability. Recent advances in this field have focused on enhancing hydrogen yields through optimised cultivation techniques, pretreatment strategies, and integrated bioelectrochemical systems. Therefore, this review summarises current research on microalgae-based bio-H<sub>2</sub> production, highlighting novel pretreatment methods, genetic engineering, microbial immobilisation, and hybrid bio-H<sub>2</sub> fermentation systems to display novel strategies for increasing bio-H<sub>2</sub> yield. Furthermore, this review focuses on innovative reactor designs, such as microbial electrolysis cells (MECs) and hybrid systems fed with microalgae hydrolysate, to enhance bio-H<sub>2</sub> yields, thereby positioning microalgae as a key player in transitioning to a sustainable hydrogen economy.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104325"},"PeriodicalIF":4.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154663","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Assessing different methods to preserve biochemical fractions in microalgal biomass for commercial applications 评估商业应用中保存微藻生物质生化组分的不同方法

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-23 DOI: 10.1016/j.algal.2025.104330

Alla Silkina , José Ignacio Gayo-Peláez , Kam W. Tang

{"title":"Assessing different methods to preserve biochemical fractions in microalgal biomass for commercial applications","authors":"Alla Silkina , José Ignacio Gayo-Peláez , Kam W. Tang","doi":"10.1016/j.algal.2025.104330","DOIUrl":"10.1016/j.algal.2025.104330","url":null,"abstract":"<div><div>Different methods exist for preserving microalgal biomass, but their relative effectiveness in maintaining the integrity of key biochemical constituents over an extended period of time remains unclear. This study compared the performance of different methods (refrigeration, freezing, freeze-drying, spray-drying, and oven-drying) for preserving different biochemical fractions (carbohydrates, lipids, proteins, chlorophyll <em>a</em> and carotenoids) of two commercially important microalgal species, <em>Scenedesmus (Tetradesmus) obliquus</em> and <em>Chlorella vulgaris</em>, over 43 days. Results show compound-specific and species-specific differences in degradation. In this study, carbohydrates in <em>S. obliquus</em> were best preserved by freezing, lipids by spray-drying, and proteins by freeze-drying. In contrast, carbohydrates and lipids in <em>C. vulgaris</em> were best preserved by oven-drying, and proteins by spray-drying. A decision chart based on different percent loss values aid operators to select the optimal preservation method, especially in cases where microalgal biomass is to be used to extract multiple chemical fractions. Beyond biochemical integrity, industrial-scale operations must also consider factors such as capital investment, energy consumption, labor and material costs, processing time and material loss. For example, oven-drying is inexpensive but has a long processing time, whereas spray-drying, while requiring higher capital and skill investment, has a fast throughput that may be more preferable in a competitive commercial space. This article provides practical recommendations for selecting appropriate preservation methods for algal biomass in both commercial and laboratory contexts, based on which a decision chart was formulated to aid operators in choosing the most appropriate preservation method.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104330"},"PeriodicalIF":4.5,"publicationDate":"2025-09-23","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154664","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The establishment of a microalgae-bacteria co-culture system for real anaerobic digestion piggery effluent treatment 建立微藻-细菌共培养系统，实现猪场污水的厌氧消化处理

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-22 DOI: 10.1016/j.algal.2025.104321

Yu Zhang , Jinrui Gao , Yu Qin, Shuangyu Li, Yibo Wang, Songsong Ji, Zhongliang Sun, Liqin Sun

{"title":"The establishment of a microalgae-bacteria co-culture system for real anaerobic digestion piggery effluent treatment","authors":"Yu Zhang , Jinrui Gao , Yu Qin, Shuangyu Li, Yibo Wang, Songsong Ji, Zhongliang Sun, Liqin Sun","doi":"10.1016/j.algal.2025.104321","DOIUrl":"10.1016/j.algal.2025.104321","url":null,"abstract":"<div><div>A microalgae-bacteria co-culture system was established by combining in-situ activated sludge bacteria (<em>ASB</em>) with <em>Chlorella vulgaris</em> (<em>C. vulgaris</em>) for the treatment of real anaerobic digestion piggery effluent (ADPE). The results suggest that the optimal strategy for establishing the co-culture system is an initial inoculation with <em>ASB</em> for one day, followed by <em>C. vulgaris</em>, with an inoculation ratio of 1:1. Subsequently, a custom-designed <em>C. vulgaris</em>-<em>ASB</em> biofilm photobioreactor was employed for scale-up testing under semi-continuous operation. This photobioreactor demonstrated competitive performance in treating ADPE, achieving removal efficiencies of approximately 60 %, 70 %, 98 % and 66 % for total phosphorus (TP), total nitrogen (TN), ammonia nitrogen (NH<sub>4</sub><sup>+</sup>-H) and chemical oxygen demand (COD), respectively. Interestingly, a higher renewal rate of ADPE contributed to more efficient COD removal, which is typically considered the most challenging parameter in wastewater treatment. Benefiting from the effective COD reduction, the effluent under 30 % renewal conditions met the discharge standards for pollutants from livestock and poultry breeding (GB18596–2022, China). Microbiome analysis reveals that higher ADPE renewal rates were correlated with increased microbial biodiversity. This study highlights the great potential of the <em>C. vulgaris-ASB</em> consortia system to treat real ADPE while simultaneously facilitating microalgal biomass recovery.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104321"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117893","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Sustainable valorization of treated wastewater with the green microalga Monoraphidium minutum for valuable products 绿色微藻对处理过的废水的可持续增值，以获得有价产品

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-22 DOI: 10.1016/j.algal.2025.104319

Zakaria Tazart , Ranya Saidi , Abdallah Oukarroum

{"title":"Sustainable valorization of treated wastewater with the green microalga Monoraphidium minutum for valuable products","authors":"Zakaria Tazart , Ranya Saidi , Abdallah Oukarroum","doi":"10.1016/j.algal.2025.104319","DOIUrl":"10.1016/j.algal.2025.104319","url":null,"abstract":"<div><div>This study evaluates the potential of <em>Monoraphidium minutum</em>, a microalgal strain isolated from a Moroccan coastal wetland, for biomass production and wastewater treatment. Unlike previous studies, this research explores the growth of the organism in treated wastewater (TWW) at varying dilution levels, assessing its role in nutrient removal and biochemical accumulation. Experimental cultures were conducted over ten days in BG11 (control), 100 % TWW, 100 % seawater (SW), and three TWW-SW mixtures (75 %, 50 %, 25 %). Growth, biochemical composition (lipids, proteins, pigments), photosynthetic efficiency, and nutrient removal were analyzed. Results show that 100 % TWW supported the highest biomass (140 × 10<sup>5</sup> cells/mL in flasks, 200 × 10<sup>5</sup> cells/mL in a photobioreactor). Lipid content peaked at ~30 %, with a fatty acid profile rich in palmitic and oleic acids, emphasizing its biofuel potential. Carotenoid accumulation and photosynthetic efficiency were highest in 100 % TWW. Nutrient removal exceeded 96 % for nitrogen and 98 % for phosphorus. These findings confirm the feasibility of <em>M. minutum</em> for wastewater bioremediation and bioresource recovery, positioning TWW as a sustainable and cost-effective medium for microalgae cultivation and biofuel production.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104319"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145117892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Toxicity and photoprotective properties of mycosporine-like amino acids from the cyanobacterium Sphaerospermopsis torques-reginae 球形蓝藻中真菌孢素样氨基酸的毒性和光保护特性

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-22 DOI: 10.1016/j.algal.2025.104326

Vanessa Geraldes , Fernanda Rios Jacinavicius , Larissa Souza Passos , Marli Fátima Fiore , Erick Leite Bastos , Ernani Pinto

{"title":"Toxicity and photoprotective properties of mycosporine-like amino acids from the cyanobacterium Sphaerospermopsis torques-reginae","authors":"Vanessa Geraldes , Fernanda Rios Jacinavicius , Larissa Souza Passos , Marli Fátima Fiore , Erick Leite Bastos , Ernani Pinto","doi":"10.1016/j.algal.2025.104326","DOIUrl":"10.1016/j.algal.2025.104326","url":null,"abstract":"<div><div>Natural pigments and mycosporine-like amino acids (MAAs) derived from cyanobacteria and marine algae are emerging as promising candidates for biocompatible and eco-friendly sunscreens. In this study, three MAAs - mycosporine-glycine-alanine (MGA), shinorine, and porphyra-334 - were isolated from fresh cultures of the cyanobacterium <em>Sphaerospermopsis torques-reginae</em> (ITEP-024 strain) using semi-preparative HPLC-DAD and characterized by LC-HRMS-QTOF. Cytotoxicity assays confirmed that pure MAAs (0.5 to 5 μM in water) were non-toxic to human dermal fibroblast (HDFa) cells. Although <em>S. torques-reginae</em> naturally produces MAAs, their biosynthesis is significantly upregulated under ultraviolet (UV) light exposure. Among the tested compounds, shinorine provided superior protection against UV-B-induced photodamage compared to benzophenone, a commonly used chemical sunscreen. These findings highlight the potential of MAAs from <em>S. torques-reginae</em> as safer and more effective natural alternatives to conventional sunscreens, offering enhanced photoprotection with reduced environmental impact.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104326"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154577","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Application of selenium-enriched biomass from a microalgal consortium cultivated in domestic wastewater as a biofertilizer: effect of selenium supplementation 在生活污水中培养的富硒微藻生物量作为生物肥料的应用：硒补充的效果

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-22 DOI: 10.1016/j.algal.2025.104320

Ana Maria Murillo , Amulya Kotamraju , Piet N.L. Lens , Ivet Ferrer , Enrica Uggetti , Etiele Greque de Morais

{"title":"Application of selenium-enriched biomass from a microalgal consortium cultivated in domestic wastewater as a biofertilizer: effect of selenium supplementation","authors":"Ana Maria Murillo , Amulya Kotamraju , Piet N.L. Lens , Ivet Ferrer , Enrica Uggetti , Etiele Greque de Morais","doi":"10.1016/j.algal.2025.104320","DOIUrl":"10.1016/j.algal.2025.104320","url":null,"abstract":"<div><div>Microalgae offer a sustainable and versatile solution for addressing both environmental pollution and micronutrient deficiencies, such as selenium (Se) scarcity. By coupling wastewater treatment with microalgae cultivation, it is possible to recover resources with minimal energy input while producing selenium-enriched biomass suitable for high-value applications in agriculture and animal nutrition. The objective of this study was to use microalgae derived from remediating Se laden wastewaters as a potential Se-rich resource to enrich crops with Se to secure its adequate supply in Se deficient regions. The microalgae were grown on urban wastewater enriched with 500 μg/L Se (IV) and showed Se accumulation of 42.4 mg/kg <sub>biomass</sub> and an average Se(IV) removal efficiency of 48 %. The Se enriched microalgae were tested at different concentrations (0–100 mg/L) on soil for the cultivation of the Asiatic leaf vegetable pak choi. Plant growth parameters like the leaf number, root length and shoot height, fresh and dry weight were evaluated. Se-enriched biomass increased pak choi shoot and root lengths to 20 cm and 30 cm, respectively. This suggests that microalgae cultivated in the presence of wastewater containing Se can serve as a biofertilizer to enhance the growth and Se content of a plant, thus offering dual benefits of Se rich wastewater remediation and use of microalgae enriched with Se as biofertilizer for biofortification of food crops in regions that are deficient in Se.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104320"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154578","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Next-generation tribology: Evaluating hybrid nano-additive enhanced Botryococcus braunii microalgal lubricants 新一代摩擦学：评价混合纳米添加剂增强的布朗杆菌微藻润滑油

IF 4.5 2区生物学

Algal Research-Biomass Biofuels and Bioproducts Pub Date : 2025-09-22 DOI: 10.1016/j.algal.2025.104317

Priyanka Singh , Nathi Ram Chauhan

{"title":"Next-generation tribology: Evaluating hybrid nano-additive enhanced Botryococcus braunii microalgal lubricants","authors":"Priyanka Singh , Nathi Ram Chauhan","doi":"10.1016/j.algal.2025.104317","DOIUrl":"10.1016/j.algal.2025.104317","url":null,"abstract":"<div><div>This study investigates the physicochemical and tribological performance of <em>Botryococcus braunii</em> microalgae-based bio-nanolubricants enhanced with hybrid nano-additives such as graphene oxide (GO), titanium oxide (TO), aluminium oxide (AO), and multiwalled carbon nanotubes (MWCNTs) using oleic acid as a surfactant. Eight formulations were prepared and evaluated for stability, thermal properties, and lubrication performance. Eta potential and particle size analysis confirmed strong colloidal stability and uniform dispersion of nanoparticles. FTIR spectra indicated strong CH₂/CH₃ stretching and carbonyl peaks, reflecting the presence of long-chain fatty acids and low oxidation products compared to conventional 20 W-40 oil. Physicochemical analysis confirmed improved viscosity, thermal stability, flash point, and pour point, with all samples remaining stable without phase separation for 72 h. Tribological testing using a Pin-on-Disc Tribometer under loads of 20, 80, 140, and 200 N showed that <em>B. braunii</em> oil with hybrid nanoadditives (GO + MWCNTs) exhibited the lowest coefficient of friction of 0.277 at 200 N, minimal wear scar diameter 0.89 mm and specific wear rate 0.0027 × 10<sup>−3</sup> mm<sup>3</sup>/N-m, outperforming all other formulations compared to conventional lubricant 20 W-40. Morphological analysis confirmed smoother contact surfaces with minimal grooves. GC–MS analysis revealed a high proportion of C<sub>17</sub>–C<sub>19</sub> fatty acid methyl esters (FAMEs), enhancing oxidation stability and lubricity. <em>B. braunii</em> oil with hybrid nanoadditives (GO + MWCNTs) stands out as a renewable, sustainable, and high-performance lubricant. Its superior tribological behavior demonstrates the potential of microalgae-based bio-nanolubricants to replace petroleum-based oils, offering both environmental benefits and reliable mechanical protection in industrial applications.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104317"},"PeriodicalIF":4.5,"publicationDate":"2025-09-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154662","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0