Algal Research-Biomass Biofuels and Bioproducts最新文献

{"title":"Comparative analysis of endogenous phytohormone profilings in different life stages of Haematococcus pluvialis by targeted metabolomics","authors":"Yang Sun ,&nbsp;Yun Li ,&nbsp;Jing Zhang ,&nbsp;Jiaji Zhang ,&nbsp;Wenjie Yan ,&nbsp;Xu Gao","doi":"10.1016/j.algal.2025.104283","DOIUrl":"10.1016/j.algal.2025.104283","url":null,"abstract":"<div><div>Phytohormones play a crucial role in the growth and production of commercial microalgae, and are closely associated with their life stages. In the study, targeted metabolomics analysis was performed by liquid chromatography-tandem mass spectrometry (LC-MS/MS) to investigate the phytohormone profiles of four life stages (zoospores, ZP; palmella, PL; palmella cell in transition to aplanospore, PAL; aplanospore, AL) of <em>Haematococcus pluvialis</em>. A total of 18 phytohormones were identified and quantified, including 4 auxins, 8 cytokinins (CKs), 2 jasmonates, 2 growth inhibitors, 1 abscisic acid (ABA), and 1 salicylic acid (SA). Indole-3-acetic acid (IAA) was the major auxin, with the highest content observed at the PL stage when biomass accumulation reaches its highest peak. <em>Cis</em>-zeatin (cZ) and <em>cis</em>-zeatin riboside (cZR) were the two predominant CKs, which increased significantly at the AL stage. Similarly, abscisic acid (ABA) content was the highest at the AL stage, which was associated with the accumulation of astaxanthin. The results provide important basic information for the development of plant growth regulators in the production of <em>H. pluvialis</em>.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104283"},"PeriodicalIF":4.5,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145010396","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":"Cell aggregation and temperature regulation mitigate Poterioochromonas predation on fast-growing cyanobacteria","authors":"Bin Long ,&nbsp;Ana Ramos ,&nbsp;Joshua S. Yuan ,&nbsp;Susie Y. Dai","doi":"10.1016/j.algal.2025.104285","DOIUrl":"10.1016/j.algal.2025.104285","url":null,"abstract":"<div><div>Cyanobacteria are promising for sustainable bioproduction but are vulnerable to predation, particularly by the mixotrophic protist <em>Poterioochromonas</em>, which threatens large-scale cultivation. This study investigates the predation susceptibility of three fast-growing cyanobacterial strains—<em>Synechococcus elongatus</em> UTEX 2973 (S2973), <em>Synechococcus elongatus</em> PCC 11801 (S11801), and <em>Synechococcus</em> sp. PCC 11901 (S11901)—to <em>Poterioochromonas</em> sp. CCMP 2740, using a reproducible predator-prey model. Grazing experiments, microscopy, and growth measurements revealed that while all strains were susceptible, S11801 and S11901 exhibited significantly higher resistance than S2973. This resistance was linked to their natural formation of microcolonies, which offered spatial protection and size exclusion against the predator. Engineering S2973 to aggregate enhanced its predation tolerance, confirming cell aggregation as a protective mechanism. Additionally, increasing temperature to 38 °C effectively eliminated the predator while supporting robust cyanobacterial growth, presenting a practical control strategy. These findings offer valuable insights for strain selection and predator management in cyanobacterial biomanufacturing, highlighting cell aggregation as an innate defense and temperature regulation as a practical control method.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104285"},"PeriodicalIF":4.5,"publicationDate":"2025-08-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145018962","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":"Chlorella supplementation diminishes cardiovascular risk factors in adults: A GRADE-assessed systematic review and meta-analyses of randomized clinical trials","authors":"Hamidreza Shiri ,&nbsp;Abdolkarim Talebi Taheri ,&nbsp;Ali Akbar Soleimani ,&nbsp;Mohammad Hadi Nematollahi ,&nbsp;Reza Meshkani ,&nbsp;Ghodratollah Panahi ,&nbsp;Ozra Tabatabaei-Malazy ,&nbsp;Bagher Larijani","doi":"10.1016/j.algal.2025.104281","DOIUrl":"10.1016/j.algal.2025.104281","url":null,"abstract":"<div><h3>Background</h3><div>Cardiovascular disease (CVD) poses significant health challenges and life-threatening risks worldwide. Reducing risk factors for CVD has led to a decrease in its prevalence. Chlorella, a green alga, has beneficial cardiometabolic effects.</div></div><div><h3>Methods</h3><div>Systematic searches were performed in Web of Science, Scopus, and PubMed/Medline through January 10, 2025, to identify relevant randomized controlled trials (RCTs) according to the PRISMA checklist and PICOS criteria (Population: adults &gt;18 years, Intervention: chlorella, Comparison: placebo/control, Outcomes: BMI, weight, hs-CRP, FBG, HOMA-IR, insulin, TG, TC, HDL<img>C, LDL-C, SBP, DBP, and Study: RCTs). A meta-analysis was conducted using random-effects models. The GRADE framework was used to assess evidence certainty.</div></div><div><h3>Results</h3><div>In the 25 studies (33 effect sizes), chlorella supplementation improved dyslipidemia (TC: WMD = −5.26 mg/dl, <em>P</em> &lt; 0.001; LDL-C: WMD = −7 mg/dl, <em>P</em> &lt; 0.001; HDL<img>C: WMD = 2.34 mg/dl, <em>P</em> = 0.006), enhanced insulin sensitivity (HOMA-IR: WMD = −0.31, <em>P</em> = 0.004), lowered blood pressure (SBP: WMD = −3.68 mmHg, <em>P</em> = 0.005; DBP: WMD = −2.04 mmHg, <em>P</em> = 0.04), diminished anthropometric measures (weight: WMD = −1.37 kg, <em>P</em> = 0.001; BMI: WMD = −0.25 kg/m², <em>P</em> &lt; 0.001), and reduced inflammation (hs-CRP: WMD = −0.74 mg/dl, <em>P</em> &lt; 0.001). Chlorella supplementation did not affect TG, FBG, and insulin levels. GRADE analysis showed low-quality evidence for hs-CRP and FBG, high-quality evidence for TC, LDL-C, and BMI, and moderate-quality evidence for other parameters.</div></div><div><h3>Conclusions</h3><div>This systematic review and meta-analysis demonstrate that chlorella supplementation improves blood pressure, anthropometric measures, insulin sensitivity, inflammatory markers, and dyslipidemia, which may help lower CVD risk in adults. However, more studies are needed to confirm these facts.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104281"},"PeriodicalIF":4.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931972","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":"Genomic complexity and evolutionary diversification of a novel cyanobacterium from coral reef ecosystems","authors":"Haiyan Li ,&nbsp;Wenjie Shi ,&nbsp;Leyao Zeng ,&nbsp;Jianhua Kang ,&nbsp;Kieng Soon Hii ,&nbsp;Hala F. Mohamed ,&nbsp;Renhui Li ,&nbsp;Zhaohe Luo","doi":"10.1016/j.algal.2025.104280","DOIUrl":"10.1016/j.algal.2025.104280","url":null,"abstract":"<div><div>Heterocyte-forming cyanobacteria play a critical role in carbon, oxygen, and nitrogen cycling in coral reef ecosystems. Despite their ecological significance and biomedical potential, our understanding of reef-associated cyanobacteria remains limited. This study described <em>Aliinostoc maniaoense</em> sp. nov., a novel heterocyte-forming cyanobacterium isolated from a tropical coral reef in the South China Sea. Morphologically, <em>A. maniaoense</em> exhibited filaments with loose structural arrangement, gas vesicle-bearing motile hormogonia, and cylindrical or irregularly shaped akinetes, distinguishing it from other members of the genus. Phylogenetic analyses confirmed its placement within <em>Aliinostoc</em> and demonstrated significant genetic divergence from previously described species. Genomic analysis revealed a complete nitrogen fixation gene cluster, whose phylogeny suggested ancient rearrangement or horizontal acquisition, likely reflecting ecological adaptation and the selective advantage of biological nitrogen fixation in nutrient-poor coral reef habitats. Additionally, <em>A. maniaoense</em> possessed an unusually high number of ribosomal operons, with notable variations in 16S<img>23S internal transcribed spacer (ITS) secondary structures, highlighting the complexity of ITS-based taxonomy in cyanobacteria. In vitro bioactivity assays demonstrated potent cytotoxic effects against several cancer cell lines, underscoring its biomedical potential. Moreover, genome mining revealed biosynthetic gene clusters for nocuolin A and heterocyst glycolipids along with several uncharacterized secondary metabolite pathways, suggesting promising ecological and biotechnological applications. These findings expanded our understanding of cyanobacterial diversity in coral reefs and emphasized the importance of integrating morphological, molecular, and genomic approaches for accurate species classification and functional characterization.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104280"},"PeriodicalIF":4.5,"publicationDate":"2025-08-30","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144988072","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":"Distinct mRNA and miRNA responses in Chlamydomonas reinhardtii reveal particle-specific adaptive mechanisms to ZnO nanoparticles and ZnO bulk","authors":"Monika Damyanov ,&nbsp;Martina Kolackova ,&nbsp;Vladimira Tarbajova ,&nbsp;Zuzana Bytesnikova ,&nbsp;Nikola Vintrlikova ,&nbsp;Pavel Svec ,&nbsp;Jana Pekarkova ,&nbsp;Petr Urbis ,&nbsp;Jana Havrankova ,&nbsp;Samuel Zachej ,&nbsp;Dominik Pinkas ,&nbsp;Vlada Filimonenko ,&nbsp;Lukas Richtera ,&nbsp;Andrea Ridoskova ,&nbsp;Dalibor Huska","doi":"10.1016/j.algal.2025.104266","DOIUrl":"10.1016/j.algal.2025.104266","url":null,"abstract":"<div><div>We investigated the adaptive responses of <em>Chlamydomonas reinhardtii</em> to ZnO nanoparticles (ZnO NPs) and ZnO bulk (ZnO Bulk) using integrated physiological, transcriptomic, and miRNA analyses. Cryo-TEM and AAS showed that ZnO NPs accumulated at higher levels and were more widely distributed in cells, whereas ZnO Bulk formed larger intracellular structures. Both materials activated oxidative stress defenses and metal homeostasis, but Bulk uniquely induced strong DNA repair, protein folding, and cell cycle pathways, indicating sustained cellular stress. Small RNA profiling revealed broader miRNA modulation under Bulk exposure, targeting genes linked to chromatin regulation, signaling, and stress adaptation. However, the absence of consistent inverse miRNA–mRNA correlations suggests that miRNAs act mainly as modulators, with transcriptional and proteomic reprogramming driving the primary response. These findings highlight how particle size and aggregation state shape both transcriptional and post-transcriptional regulation in algal stress adaptation, providing new insight into microalgal resilience to engineered ZnO materials.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104266"},"PeriodicalIF":4.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996661","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":"One-pot green synthesis of platinum nanoparticles (Pt-NPs) using Sargassum polyphyllum extract displays nanodrug prospects against human cervical, breast, and colon cancer cells","authors":"Sabiha Mahmood Ansari ,&nbsp;Quaiser Saquib ,&nbsp;Hend Awad Alwathnani ,&nbsp;Sulaiman Ali Alharbi ,&nbsp;Mohammed Rafi Shaik ,&nbsp;Mufsir Kuniyil ,&nbsp;Syed Farooq Adil ,&nbsp;Maqsood Ahmad Siddiqui ,&nbsp;Javed Ahmad ,&nbsp;Rizwan Wahab ,&nbsp;Sheikh Fayaz Ahmad ,&nbsp;Abdulaziz Ali Al-Khedhairy","doi":"10.1016/j.algal.2025.104278","DOIUrl":"10.1016/j.algal.2025.104278","url":null,"abstract":"<div><div>Fabrication of nanoparticles (NPs) via green method has superseded the chemical procedures owing to its inherent features of biocompatibility and environment safety. From this perspective we used <em>Sargassum polyphyllum</em>, a marine brown macroalgae, preserving unique phytochemicals and growing under stress-tolerant environmental settings. We aimed for synthesizing platinum NPs (Pt-NPs) using extracellular extract of <em>S. polyphyllum</em> and evaluated its in vitro anticancer efficacy against human breast (MCF-7), cervical (HeLa), and colon (HT-29) cancer cells. Pt-NPs formation confirmed by color change with simultaneous disappearance of SPR band at 258.4 nm. TEM and SEM analysis exhibited rough surfaced aggregated clusters of pleomorphic spheroidal particles having an average size of 4.7 ± 0.01 nm. The hydrodynamic properties of Pt-NPs showed small (90.65 d.nm) and large (367.7 d.nm) peaks in DLS and a zeta (<em>ζ)-</em>potential of −43.6 mV. MTT and NRU assays exhibited cytotoxic effects in MCF-7, HeLa, and HT-29 cells after Pt-NPs exposure for 24 h. Flow cytometric analysis of Pt-NPs-treated cells caused dysfunction of mitochondrial membrane potential (<em>ΔΨm</em>), greater levels of intracellular ROS, NO, esterase, and Ca²⁺ influx. Pt-NPs induced nuclear DNA damage and triggered apoptotic cell death in the cancer cells. Subsequently immunofluorescence has affirmed cytoplasmic localization of p53 in Pt-NPs treated cancer cells. qPCR array of 84 genes demonstrated the activation of myriad genes pertaining to human cancer pathway in the exposed cells. On the whole Pt-NPs has demonstrated its anticancer efficacy in the order of HeLa&gt;MCF-7 &gt; HT-29 cells indicating its prospective as a nanodrug derived through eco-friendly approach.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104278"},"PeriodicalIF":4.5,"publicationDate":"2025-08-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144931971","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":"Exploring activated carbon-based microalgae residue to improve CO2 adsorption performance","authors":"Low Yi Chian ,&nbsp;Umi Fazara Md Ali ,&nbsp;Farihahusnah Hussin ,&nbsp;Mohamed Kheireddine Aroua ,&nbsp;Naimah Ibrahim ,&nbsp;Mohd Azmier Ahmad","doi":"10.1016/j.algal.2025.104271","DOIUrl":"10.1016/j.algal.2025.104271","url":null,"abstract":"<div><div>The rising atmospheric carbon dioxide (CO₂) levels have driven interest in Carbon Capture and Storage (CCS) technologies. Adsorption technology has gained significant attention because of its cost-effectiveness, high efficiency, and scalability. This study focused on producing activated carbon from <em>Nannochloropsis gaditana</em> microalgal residue (post-lipid extraction) using a one-step KOH activation and carbonization method. The resulting activated carbon was characterized using scanning electron microscopy combined with energy-dispersive X-ray spectroscopy (SEM-EDX) to examine the surface morphology, Brunauer-Emmett-Teller (BET) analysis to determine the surface area and porosity, and Fourier Transform Infrared Spectroscopy (FTIR) to identify the surface functional groups. CO₂ adsorption performance was evaluated at different temperatures (25, 40, and 55 °C) and inlet feed flow rates (200 and 400 mL/min). The kinetics of CO₂ adsorption and regeneration of activated carbon were examined. SEM results showed successful activation of the microalgae-residue with mesopores and micropores, while EDX showed an increase in carbon content in the activated carbon compared to raw microalgae residue. BET result showed that the prepared activated carbon has a surface area of 296.96 m2/g, average pore diameter of 2.26 nm and total pore volume of 0.17 cm3/g. The presence of oxygen-containing surface functional groups such as hydroxyl (OH) and carbonyl (C=O) in activated carbon were confirmed by FTIR spectroscopy. The highest adsorption capacity of 0.55 mmol/g was obtained at 25 °C and 400 mL/min. The longest breakthrough time (7 min) was observed at 25 °C and 200 mL/min. In this study, CO₂ adsorption followed pseudo-first-order kinetics, and a regeneration study showed good stability of activated carbon over four cycles.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104271"},"PeriodicalIF":4.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895442","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":"Pancreatin digestion of B-phycoerythrin from Porphyridium purpureum releases chromopeptides with inhibitory activity towards SARS-CoV-2 main protease","authors":"Nikola Gligorijević ,&nbsp;Jelena Radović ,&nbsp;Milica Radibratović ,&nbsp;Marija Đorđević ,&nbsp;Dušan Spasić ,&nbsp;Olgica Nedić ,&nbsp;Milan Nikolić ,&nbsp;Simeon Minić","doi":"10.1016/j.algal.2025.104274","DOIUrl":"10.1016/j.algal.2025.104274","url":null,"abstract":"<div><div>Unique features of covalently attached tetrapyrrole chromophores give phycobiliproteins (PBPs) remarkable optical and bioactive properties with significant potential for application in the food industry, medicine, and biotechnology. This study investigated the potential of chromopeptides, released upon enzymatic digestion of major PBPs from cyanobacteria <em>Limnospira platensis</em> (C-Phycocyanin) and red microalgae <em>Porphyridium purpureum</em> (B-Phycoerythrin), to inhibit the main protease (M^pro) of SARS-CoV-2 virus. The digest obtained by pancreatin digestion of B-Phycoerythrin exhibits the highest inhibitory activity with estimated IC₅₀ values in the low micromolar range. Mass spectrometry was used to determine the sequence of RP-HPLC-purified chromopeptides, and small peptides (2–7 amino acid residues) were identified. The inhibitory activity of purified chromopeptides confirmed that chromopeptides are the major components in B-Phycoerythrin digest and are responsible for M^pro inhibition. The binding of chromopeptides to M^pro was evaluated using molecular docking, while molecular dynamics simulations were employed to propose a plausible mechanism of M^pro inhibition.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104274"},"PeriodicalIF":4.5,"publicationDate":"2025-08-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895443","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":"Isolation, identification and optimization of culture condition of freshwater microalgae in Northwestern Ontario, Canada for sustainable lipid and biomass production","authors":"Janak Raj Khatiwada ,&nbsp;Ou Li ,&nbsp;Chonlong Chio ,&nbsp;Rishnika Boteju ,&nbsp;Dhanushya Thilagam Jeyakumar ,&nbsp;Chao Liu ,&nbsp;Sarita Shrestha ,&nbsp;Wensheng Qin","doi":"10.1016/j.algal.2025.104264","DOIUrl":"10.1016/j.algal.2025.104264","url":null,"abstract":"<div><div>Native freshwater microalgae play a crucial role in biofuel production due to their unique characteristics and environmental suitability. This study investigated the diversity of microalgae species in various freshwater ecosystems across Northwestern Ontario, Canada and isolated microalgae species with higher biomass and lipid production capacity. Among the 75 strains, a total of five microalgae strains with higher lipid production and growth were identified using molecular and morphological approaches. Among four different photoperiods, 16L:8D light/dark cycle produced significantly higher biomass and lipids for <em>Chlorella sorokiniana, Chlorella vulgaris</em>, and <em>Chlamydomonas</em> sp. The results indicated a rich diversity of microalgae species from the region of Northern Ontario, with promising lipid accumulation isolates with high biomass productivity. This study highlighted the potential for utilizing native microalgae strains as the source of renewable lipids and biomass for biofuel and biomolecule production.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104264"},"PeriodicalIF":4.5,"publicationDate":"2025-08-21","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144895445","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":"Challenges and ecological implications of residual PAC and SPFS coagulants in harmful algal bloom control","authors":"Yanyan Zhou ,&nbsp;Fangqi Liu ,&nbsp;Sujie Shan ,&nbsp;Songqi Liu ,&nbsp;Xiaokai Zhang ,&nbsp;Christina Lopez ,&nbsp;Boling Li ,&nbsp;Dapeng Li","doi":"10.1016/j.algal.2025.104272","DOIUrl":"10.1016/j.algal.2025.104272","url":null,"abstract":"<div><div>This study examines the impact of micro-coagulants, which refer to residual coagulants remaining in the water after treatment, on algal blooms, particularly in controlling harmful algal blooms (HABs) caused by cyanobacteria such as <em>Microcystis</em> spp. Using sodium polyferric sulfate (SPFS) and polyaluminum chloride (PAC) as model coagulants, we evaluated their effects at varying concentrations on algal growth, nutrient dynamics, and community structure. Results revealed that low concentrations of coagulants promoted <em>Microcystis</em> growth and microcystin production, likely due to trace elements serving as essential micronutrients and highlighting an overlooked ecological risk of coagulant discharge. On the contrary, high concentrations effectively inhibit the proliferation of cyanobacterial by reducing bioavailable nitrogen and phosphorus, promoting nutrient flocculation, and promoting the growth of green algae and diatoms rather than cyanobacteria. High concentration coagulants also increase dissolved oxygen and pH values, further supporting non-toxic algal species. This study emphasizes the dual role of coagulants in HABs management: while high concentrations mitigate HABs, residual coagulants discharged into natural water bodies need to be further considered in environmental management to prevent unexpected ecological impacts.</div></div>","PeriodicalId":7855,"journal":{"name":"Algal Research-Biomass Biofuels and Bioproducts","volume":"91 ","pages":"Article 104272"},"PeriodicalIF":4.5,"publicationDate":"2025-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144893403","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}