Algal Research-Biomass Biofuels and Bioproducts最新文献

{"title":"Transformation of seaweed waste into valuable phycocolloids able of reducing the arsenic, mercury and vanadium toxicity in aqueous solutions","authors":"Angela Macrì ,&nbsp;Eleonora Agostino ,&nbsp;Damiano Spagnuolo ,&nbsp;Domenico Trombetta ,&nbsp;Antonella Smeriglio ,&nbsp;Antonio Spanò ,&nbsp;Marina Morabito ,&nbsp;Giuseppa Genovese ,&nbsp;Maria Teresa Caccamo ,&nbsp;Salvatore Magazù ,&nbsp;Marco Sebastiano Nicolò ,&nbsp;Vincenzo Zammuto ,&nbsp;Concetta Gugliandolo","doi":"10.1016/j.algal.2025.104002","DOIUrl":"10.1016/j.algal.2025.104002","url":null,"abstract":"<div><div>Heavy metal pollution is a major environmental and human concern. The conversion of invasive macroalgae biomass, usually treated as waste, into high-valuable and eco-friendly products, is gaining growing interest in removing heavy metals (HMs). In this study, phycocolloids (PCs) extracted by a microwave-assisted method from <em>Agardhiella subulata</em> (κ-carrageenan), <em>Sargassum muticum</em> (alginate) and <em>Ulva ohnoi</em> (ulvan) were preliminary evaluated for their ability to reduce the toxicity of arsenite (As(III)), mercury (Hg(II)) and vanadate (V(V)), using inhibition assays of bioluminescence and viability of the marine diatom <em>Phaeodactylum tricornutum</em>. Although all PCs (1000 μg mL⁻¹) slightly reduced As(III) toxicity (≤10 %), all strongly reduced V(V) toxicity (≥70 %), only ulvan was also able to reduce more than twofold the Hg(II) toxicity. To investigate the mechanisms involved in the toxicity reduction, PCs were evaluated for: i) the ability to adsorb As(III), Hg(II) and V(V), and ii) the interaction between PCs functional groups and HMs. PCs adsorbed Hg(II) more efficiently than V(V) or As(III), being ulvan the most efficient in adsorbing Hg(II) (74 %), while alginate and κ-carrageenan were more efficient in adsorbing V(V) (40 %). Interestingly, after reaching the maximum adsorption capacity (30 min), Hg(II) and V(V) remained adsorbed to the PCs for a long time(over 240 min). As resulted by ATR-FTIR analysis, the biosorption mechanisms were mainly attributed to electrostatic interactions between Hg(II) and the functional groups (–COOH and C<img>O) of ulvan, whereas specific binding sites of alginate and κ-carrageenan complexed V(V). Although the adsorption of V(V) by ulvan was negligible, the spectra indicated that vanadate was chemically reduced to a lesser toxic form. Our results suggest that these PCs, extracted by an eco-friendly procedure, could be used to develop new strategies to remediate Hg(II) and V(V) pollution and simultaneously counteract their harmful effects in aquatic environments.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 104002"},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143642185","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feasibility of using freshwater microalgae to remove triclosan from aqueous media","authors":"Ana Gisell Pazmino-Sosa ,&nbsp;Jean-François Blais ,&nbsp;Pascale Champagne","doi":"10.1016/j.algal.2025.104001","DOIUrl":"10.1016/j.algal.2025.104001","url":null,"abstract":"<div><div>Triclosan, [5-chloro-2-(2,4-dicholophenoxy)phenol] (TCS), a broad-spectrum antimicrobial agent found in many personal care products, has raised concerns due to its presence in the environment. TCS has been associated to harmful effects, including oxidative damage in golfish cells, increased lipid peroxidation in clams, and disruption of the hypothalamic-pituitary-gonadal axis in Catla fish, and its potential contribution to antimicrobial resistance. This study evaluates the feasibility of using two freshwater microalgae species to remove TCS from aqueous media by 1) determining the toxicity of TCS on algal cultures, 2) evaluating their potential to remove TCS, and 3) identifying the TCS degradation kinetics. The toxicity test assessed various concentrations of TCS (0.06, 0.10, 0.20, 0.30, 1 mg L⁻¹) on <em>Chlorella vulgaris</em> and <em>Scenedesmus obliquus</em> growth. Results showed that <em>C. vulgaris</em> was entirely inhibited by concentrations exceeding 0.10 mg L⁻¹. In comparison, <em>S. obliquus</em> tolerated up to 0.30 mg L⁻¹ after six days of lag phase, but 1 mg L⁻¹ was toxic for both species. The removal efficiency achieved by <em>S. obliquus</em> was between 79 % and 94 % across all concentrations tested, while <em>C. vulgaris</em> achieved 70–95 % removal only in concentrations lower than 0.10 mg L⁻¹. The degradation kinetics revealed that the TCS half-life in wastewater was 1.3 days when <em>S. obliquus</em> was present, highlighting its potential to enhance pollutant removal. This study provides insights into the use of <em>S. obliquus</em> for removing contaminants from natural environments, contributing to understanding TCS dynamics in ecosystems with the presence of microalgae.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 104001"},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143739297","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}

{"title":"Photosynthetic advantage promotes Microcystis competitiveness against Scenedesmus: Synchronized dynamics and structure shifts in symbiotic microbiomes","authors":"Zeshuang Wang,&nbsp;Zhaowen Hu,&nbsp;Zengling Ma,&nbsp;He Zhang,&nbsp;Peng Xiao,&nbsp;Siyu Yang,&nbsp;Jun Zuo,&nbsp;Renhui Li","doi":"10.1016/j.algal.2025.104000","DOIUrl":"10.1016/j.algal.2025.104000","url":null,"abstract":"<div><div><em>Microcystis</em> threaten aquatic ecosystems because of its low nutritional value and cyanotoxin production. While its stress-induced photosynthetic enhancement under nutrient limitation is recognized, the role of interspecific competition in driving photo-physiological adaptation remains unclear. Field observations reveal synchronized restructuring of <em>Microcystis</em>-associated symbiotic microbiomes with algal dominance shifts, while their dynamics in laboratory competition systems remain poorly understood. We investigated <em>Microcystis aeruginosa</em>–<em>Scenedesmus obliquus</em> interactions under controlled competition, revealing: (1) <em>S. obliquus</em> presence triggered <em>M. aeruginosa</em> photosynthetic upregulation; (2) the specific growth rates and carrying capacities of both algae were mutually inhibited, with <em>M. aeruginosa</em> exerting a stronger inhibitory effect on <em>S. obliquus</em> than vice versa; (3) the structure and composition of the symbiotic microbial community changed in tandem with the increasing dominance of <em>M. aeruginosa</em>; (4) the relative abundance of bacteria associated with <em>M. aeruginosa</em>, including <em>Rhodobacter</em>, <em>Porphyrobacter</em>, and <em>Methylophilus</em>, gradually increased in parallel with the dominance of <em>M. aeruginosa</em>. These results indicate that enhanced photosynthesis facilitates the competitive advantage of <em>M. aeruginosa</em> over <em>S. obliquus</em> and emphasize the synchronized dynamics of the symbiotic microbial community, resembling patterns observed in natural waters. Our findings provide insights into cyanobacterial succession, informing bloom prediction and microbial management strategies.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 104000"},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629431","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}

{"title":"Constructing a stable mannitol biosynthetic pathway in cyanobacteria via the introduction of heterologous mannitol dehydrogenase","authors":"Jiahui Sun ,&nbsp;Xiangyi Yuan ,&nbsp;Jinhui Tang ,&nbsp;Huili Sun ,&nbsp;Guodong Luan ,&nbsp;Xuefeng Lu","doi":"10.1016/j.algal.2025.103998","DOIUrl":"10.1016/j.algal.2025.103998","url":null,"abstract":"<div><div>Mannitol, a valuable sugar alcohol, finds extensive application in food and medicine industries. The advancements of synthetic biology technology have unlocked the potential of cyanobacteria for directly converting CO₂ into mannitol. Previously, attempts have been made to engineer mannitol synthesizing cyanobacteria strains by introducing a heterologous pathway consisting of mannitol-1-phosphate dehydrogenase (Mtld) and mannitol-1-phosphatase (M1Pase). However, the recombinant strains generally encountered stability and yield issues. In this work, an alternative mannitol synthesizing pathway in which a heterologous mannitol dehydrogenase (Mdh) that converts fructose into mannitol was engineered and evaluated in <em>Synechococcus elongatus</em> PCC 7942, and photosynthetic cell factories simultaneously producing mannitol and fructose were constructed. A salt stress-induced cultivation method was initially used to achieve stable mannitol synthesis by leveraging the property of mannitol as a compatible solute under salt stress. The engineered strain exhibited an improved mannitol yield of 0.95 g/L, accompanied by the synthesis of 1.05 g/L fructose during a 15-day cultivation process under hypersaline induction. By inductively controlling the upstream sucrose metabolism, salt-independent mannitol-fructose co-production can be realized in long-term cultivation. This led to the accumulation of 0.7 g/L mannitol and 0.27 g/L fructose in the recombinant strain, with no spontaneous mutations observed in the mannitol biosynthesis operon during a 31-day cultivation process. This study represents the first instance of constructing a cyanobacterial mannitol cell factory employing the Mdh-driven pathway. The findings in this work provided new strategies for engineering efficient and stable photosynthetic cell factories of mannitol in future, also sheds light on the plasticity of cyanobacterial sugar metabolism networks.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103998"},"PeriodicalIF":4.6,"publicationDate":"2025-03-13","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143629488","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}

{"title":"Harnessing the potential of Chlorella vulgaris in salmon industry wastewater treatment: The role of salinity type in optimizing biorefinery processes","authors":"Cynthia Urrutia Molina ,&nbsp;María Eugenia González Quijón ,&nbsp;Erwin Yañez ,&nbsp;Claudio R. Navarro ,&nbsp;Camilo Rodríguez-Villegas ,&nbsp;David Silva","doi":"10.1016/j.algal.2025.103999","DOIUrl":"10.1016/j.algal.2025.103999","url":null,"abstract":"<div><div>The increasing demand for sustainable wastewater treatment solutions has led to the exploration of microalgae-based systems, which offer dual benefits of pollutant removal and biomass valorization. This study investigates the potential of <em>Chlorella vulgaris</em> cultivated in mixed salmon industry wastewater with varying salinity conditions (synthetic, natural, and industrial sources) for bioremediation and bio-crude oil production. The removal efficiencies for heavy metals reached 64.63 % for Cu in RM treatment, 32.76 % for Zn in RN treatment, and 9.43 % for Pb in YR treatment. Regarding nutrient uptake, YR demonstrated the highest efficiency, removing 75.44 % of N and 16.54 % of PO₄^{3<strong>−</strong>}<strong>.</strong> These results demonstrate the capability of microalgae to remediate wastewater under different saline conditions. Confocal Laser Scanning Microscopy (CLSM) analysis revealed significant lipid accumulation. The highest relative mean fluorescence intensity was recorded for the YR treatment (2624 ± 806 AU), followed by RM (1468 ± 2160 AU) and RN (1396 ± 1276 AU), confirming the influence of salinity on lipid biosynthesis. The bio-crude oil yield obtained from HTL of microalgal biomass ranged from 3.15 % to 10.26 % for RN and RM, respectively, showing an effect of the salinity conditions and nutrient availability in the culture medium. These results are indicative of its potential, which could be applicable to food or biofuel products developed in support of a circular bioeconomy in the salmon industry. Future research should focus on refining the process conditions to maximize energy recovery and resource efficiency in large-scale applications.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103999"},"PeriodicalIF":4.6,"publicationDate":"2025-03-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143636437","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}

{"title":"Lighting strategy drives removal of ammonia nitrogen and phosphate in microalgae-bacteria consortia under tetracycline hydrochloride exposure","authors":"Jingshen Zhang ,&nbsp;Shuangxi Li ,&nbsp;Huiling Lu ,&nbsp;Liandong Zhu ,&nbsp;Fengchang Wu","doi":"10.1016/j.algal.2025.103989","DOIUrl":"10.1016/j.algal.2025.103989","url":null,"abstract":"<div><div>Microalgae and bacteria interactions play an important role in nutrient absorption and utilization. Lighting strategies are extremely crucial factors for the interaction of microalgae-bacteria consortia for the deep treatment of swine wastewater containing antibiotics. In this study, a co-culture system of <em>Chlorella sorokiniana</em> and <em>Paracoccus pantotrophus</em> was constructed to explore the effects of lighting strategy and tetracycline hydrochloride (TCH) on ammonia nitrogen (NH₄⁺-N) and phosphates removal. The results showed that the co-culture system overtly increased the removal of NH₄⁺-N and phosphate, with the maximum removal efficiencies of 85.75 % and 75.5 %, respectively. The photosynthetic activity (F_v/fm) of <em>C. sorokiniana</em> in the co-culture system was measured by a handheld algal fluorescence meter, and the value increased from 0.47 to 0.61 in comparison to the monoculture. Under complete darkness, the NH₄⁺-N removal efficiency was only 67.46 %, while the light/dark ratio increase from 12:12 to 24:0 promoted the NH₄⁺-N removal efficiency to a maximum of 87.66 %. Meanwhile, the activities of glutamate synthase (GS) and glutamine synthetase (GOGAT) assayed according to the enzyme activity detection kit were the highest with 8696 and 411 U/g prot, respectively. When TCH concentration increased from 0.5 to 2.0 mg/L, the NH₄⁺-N removal efficiency decreased from 84.07 % to 71.48 %, which might be due to the toxic effect of TCH on bacteria, leading to a decrease in the activities of GOGAT and GS in the co-culture system. In addition, the co-culture system also had a well removal on TCH, with the maximum removal efficiency reaching 93.33 %. The co-culture system performed well in the removal of pollutants (NH₄⁺-N, PO₄⁺-P and TCH), which provided a feasible and sustainable technology for the advanced treatment of swine wastewater.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103989"},"PeriodicalIF":4.6,"publicationDate":"2025-03-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619126","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}

{"title":"Heat shock transcription factor PtHSFA1b plays a critical role in the synthesis of fucoxanthin by modulating the expression of ZEP1 in Phaeodactylum tricornutum","authors":"Mange Yu ,&nbsp;Hejing Zhao ,&nbsp;Mengjie Jin ,&nbsp;Tianyu Hu ,&nbsp;Shixia Liu ,&nbsp;Jilin Xu ,&nbsp;Xiaohui Li","doi":"10.1016/j.algal.2025.103990","DOIUrl":"10.1016/j.algal.2025.103990","url":null,"abstract":"<div><div>Fucoxanthin, a pigment of substantial economic importance, has an understudied transcriptional regulatory mechanism in its biosynthetic pathway. In this study, we identified the heat shock transcription factor PtHSFA1b through a yeast one-hybrid screen as a key regulator that binds to the <em>ZEP1</em> promoter. Functional analysis revealed that overexpression of <em>PtHSFA1b</em> significantly increased fucoxanthin content, while gene editing of <em>PtHSFA1b</em> led to its reduction. Further investigation demonstrated that PtHSFA1b mediates fucoxanthin biosynthesis by binding to the <em>ZEP1</em> promoter and directly activating its expression. Genetic studies confirmed that the regulation of fucoxanthin by PtHSFA1b is ZEP1 function-dependent. These findings provide new insights into the transcriptional regulation of fucoxanthin synthesis, offering a foundation for further exploration of its biosynthetic mechanisms.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103990"},"PeriodicalIF":4.6,"publicationDate":"2025-03-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143610088","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}

{"title":"Critical assessment of several filamentous algae as bioeconomic energy under different culture conditions","authors":"Ting Zhang ,&nbsp;Jijian Long","doi":"10.1016/j.algal.2025.103992","DOIUrl":"10.1016/j.algal.2025.103992","url":null,"abstract":"<div><div>This study systematically investigated the growth characteristics, cellular morphology, and intracellular biochemical profiles of four Trentepohliaceae strains, while concurrently examining the physiological responses of <em>Tribonema</em> sp. FACHB-1786 to varying light intensities, nitrogen sources and concentrations. Comprehensive compositional analysis through GC–MS and HPLC revealed that oleic acid (C18:1) predominated the fatty acid profile, accounting for approximately 50 % of total fatty acids, with β-carotene representing 50 %–60 % of the total pigment content in Trentepohliaceae strains. The biodiesel production potential of <em>Tribonema</em> sp. FACHB-1786 was rigorously evaluated using established fuel quality parameters, demonstrating favorable lipid characteristics for renewable energy applications. Notably, the strain exhibited significant eicosapentaenoic acid (EPA) accumulation, reaching 15.6 % of total fatty acids during peak lipid production. As a clinically validated omega-3 polyunsaturated fatty acid, EPA demonstrates dual functionality in therapeutic applications through its hypolipidemic effects and immunomodulatory properties. This substantial EPA content positions <em>Tribonema</em> sp. as a promising candidate for nutraceutical development and functional food formulations. The experimental data suggest optimized cultivation strategies for enhancing both biodiesel precursors and high-value metabolites in algal biotechnology applications. The dual-output potential (bioenergy and nutraceuticals) demonstrated in this study presents a compelling case for integrated biorefinery approaches in microalgal biomass utilization.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103992"},"PeriodicalIF":4.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143747039","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}

{"title":"Application of microalgae in remediation of heavy metal-contaminated soils and its stimulatory effect on wheat growth","authors":"Jia Liu ,&nbsp;Yajing Liu ,&nbsp;Han Jiang ,&nbsp;Xiaokun Yang ,&nbsp;Xiaowen Zhang ,&nbsp;Yukun Wu ,&nbsp;Naihao Ye ,&nbsp;Chengwei Liang","doi":"10.1016/j.algal.2025.103995","DOIUrl":"10.1016/j.algal.2025.103995","url":null,"abstract":"<div><div>Heavy metal pollution has emerged as a significant threat to global soil environments, adversely impacting crop safety and human health. This study investigates the potential of microalgae as an environmental bioremediation tool and plant growth regulator. By examining the effects of four living microalgae species—<em>Anabaena azotica</em>, <em>Anabaena variabilis</em>, <em>Chlorella vulgaris</em>, and <em>Scenedesmus obliquus</em>—on cadmium (Cd) levels in soil and wheat, we assessed their ability to enhance soil fertility and promote wheat growth under varying cell number treatments. Our findings revealed that all four microalgae effectively reduced soil exchangeable Cd and limited Cd accumulation in wheat roots and stems. Remarkably, significant remediation effects were observed even at low-dose treatments, indicating that effective bioremediation does not solely rely on high concentrations. Additionally, the treatments notably increased soil organic matter, alkali-hydrolyzable nitrogen, available phosphorus, and available potassium. The pot experiments demonstrated that microalgae treatments significantly enhanced wheat root lengths, seedling growth, biomass, chlorophyll content, as well as soluble sugars and proteins. Importantly, low-dose treatment with <em>A. azotica</em> surpassed high-dose effects on wheat growth, highlighting the cost-effectiveness and practicality of low-dose applications. This study offers a scientific foundation for further exploring the role of microalgae in remediating heavy metal pollution and promoting crop development.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103995"},"PeriodicalIF":4.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143619124","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}

{"title":"Bio-sorption of metformin from aqueous solution using algae-based as effective biosorbents: Process optimization, kinetic, and isotherm studies","authors":"Farzad Hashemzadeh ,&nbsp;Seyed Hamed Derakhshandeh ,&nbsp;Mohammad Ali Niroomand","doi":"10.1016/j.algal.2025.103996","DOIUrl":"10.1016/j.algal.2025.103996","url":null,"abstract":"<div><div>The use of algae-based biosorbents to remove pollutants is one of the effective methods for the purification of contaminated water which has received great attention. Here, we used a blue-green algae <em>Spirulina platensis</em> (SP) in three different forms pure SP, KCl-modified SP, and H₃PO₄-modified SP as biosorbents for the removal of metformin from aqueous environments. The removal experiments of metformin using prepared biosorbents were monitored by various parameters such as pH of the media, contact time, sorbent dosage, and initial concentration of metformin. Adsorption kinetics and isotherms of metformin molecules onto all three biosorbents followed the pseudo-second-order and Langmuir models. Based on the Langmuir model, the maximum adsorption capacity of metformin onto SP, SP/KCl, and SP/H₃PO₄ was determined as 43.12, 44.64, and 48.54 mg/g, respectively. Green and environmentally friendly nature, cost-effective, easy preparation, good adsorption capacity, high fidelity, and recyclability are some of the prominent characteristics of the introduced biosorbents, which can act as a universal device for water and sewage treatment. A notable benefit of the bio compound of SP/H₃PO₄ is its optimal use as phosphorus fertilizer before the adsorption of metformin or after the desorption of adsorbed metformin.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"88 ","pages":"Article 103996"},"PeriodicalIF":4.6,"publicationDate":"2025-03-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143593646","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}