Adsorption of mixtures of cyanotoxins onto sediment as a dominant mechanism in the elimination of cyanotoxins from the aqueous phase has not been extensively investigated. The aim of this study was to investigate adsorption and desorption behavior of six microcystins including microcystin (MC)-LR, RR, YR, LY, LW and LF and cylindrospermopsin (CYN) on natural sediment. Freundlich and Langmuir isotherms could be fitted for MC-LR, RR, YR and CYN. Sorption kinetics showed immediate rapid adsorption for all cyanotoxins: CYN, MCLW and MCLF were adsorbed 72.6%, 56.7% and 55.3% respectively within 2 h. Results of desorption experiments demonstrated that less than 9% of cyanotoxins desorbed from sediment within 96 h. Adsorption of cyanotoxins onto three fractionated sediments particles, clay-silt (<75 μm), find sand (75-315 μm) and coarse sand (315-2000 μm) demonstrated that adsorption capacity of coarse sand fraction for all the tested cyanotoxins was less than 4% of the clay-silt fraction. Results of this study revealed that there is a potential for cyanotoxins to accumulate in the sediments of lakes, as well as in drinking water treatment plants. Monitoring programs must consider cyanotoxins in the particulate phase to avoid largely underestimating toxin concentrations following their release from blooms.
Download full-text PDF |
Source |
|---|---|
| http://dx.doi.org/10.1016/j.toxicon.2015.06.007 | DOI Listing |
Publication Analysis
Top Keywords
Similar Publications
Role of surface functional groups in the adsorption behavior of microcystin-LR on graphene surfaces.
Chemosphere
April 2025
1 Ohio University, 171 Stocker, Department of Chemical and Biomolecular Engineering, Ohio University, Athens, OH 45701, United States of America. Electronic address:
Biochars are good adsorbents for removing microcystin from water but the molecular interactions responsible for microcystin adsorption are not understood. In this work, adsorption behavior of microcystin-LR (MC-LR) on three model surfaces that mimic biochar (bare graphene, graphene with ammonium, and with phosphate functional groups) is studied using well-tempered metadynamics in atomistic simulations. MC-LR is found to strongly adsorb on all the three surfaces.
View Article and Find Full Text PDFGold nanoparticles supported onto zwitterionic polymer capillary monoliths meant for efficient enrichment of microcystins in water.
Talanta
May 2025
Key Laboratory for Analytical Science of Food Safety and Biology, College of Chemistry, Fuzhou University, Fuzhou, 350116, China; International (HongKong Macao and Taiwan) Joint Laboratory on food safety and environmental analysis, Fuzhou, 350116, Fuzhou University, China; Engineering Technology Research Center on Reagent and Instrument for Rapid Detection of Product Quality and Food Safety, Fuzhou, 350116, China. Electronic address:
The release of microcystin (MCs) in aquatic ecosystems poses a substantial risk to the safety of irrigation and drinking water. In view of the challenges associated with monitoring MCs in water bodies, given their low concentration levels (μg/L to ng/L) and the presence of diverse matrix interferences, there is an urgent need to develop an efficient, cost-effective and selective enrichment technique for MCs prior to its quantification. In this work, a gold nanoparticles (AuNPs)-functionalized zwitterionic polymer monolith was described and further applied for the affinity enrichment of MCs.
View Article and Find Full Text PDFCoupling effect of cyanobacterial blooms with migration and transformation of typical pollutants in lake or reservoir: Enhanced or decreased?
Environ Res
February 2025
State Key Laboratory of Environment Criteria and Risk Assessment, Chinese Research Academy of Environmental Sciences, Beijing, 100012, China. Electronic address:
Eutrophication of lake and reservoir caused by cyanobacterial harmful algal blooms (cyanoHABs) become a global ecological problem because of massive destruction of ecosystems, which have attracted attentions widely. In addition to the production of cyanotoxins by certain bloom-forming species, there may also be direct or indirect interactions between cyanobacteria blooms and various pollutants in lakes or reservoirs. Based on bibliometrics, 19110 papers in Web of Science (WOS) and 2998 papers in the China National Knowledge Infrastructure (CNKI) on eutrophication and cyanobacterial blooms in lakes and reservoirs were analyzed, which showed that research on this topic has been ongoing for nearly 80 years with a gradual increase in its popularity.
View Article and Find Full Text PDFInvestigation of adsorption parameters of saxitoxin onto loblolly pine-derived biochar synthesized at various pyrolysis temperature.
Chemosphere
February 2025
Department of Chemistry and Chemical Engineering, Florida Institute of Technology, 150 West University Boulevard, Melbourne, FL, 32901, USA. Electronic address:
This study highlights the use of loblolly pine derived biochar for the removal of harmful algal bloom toxin, Saxitoxin (STX), from water. Biochar samples were prepared at varying pyrolysis temperatures (400, 600 and 800 °C) for 60 min. As pyrolysis temperature increases, enhancement in surface porosity was observed (S = 7.
View Article and Find Full Text PDFEffects of cyanotoxins on nitrogen transformation in aquaculture systems with microplastics coexposure: Adsorption behavior, bacterial communities and functional genes.
Sci Total Environ
December 2024
Key Laboratory of Aquatic Resources Conservation and Development Technology Research, College of Life Sciences, Huzhou University, Huzhou City, Zhejiang Province 313000, China.
Article Synopsis
- Microcystin-LR (MC-LR) and microplastics (MPs) are emerging pollutants in freshwater aquaculture that can affect nitrogen cycles and microbial communities.
- This study explored the effects of traditional (polystyrene) and biodegradable (polylactic acid) microplastics when co-exposed with MC-LR in simulated aquaculture environments.
- Results indicated that combined pollution significantly disrupted nitrogen transformation processes and altered microbial community dynamics, with the combination of polystyrene and MC-LR presenting the highest risk.
Want AI Summaries of new PubMed Abstracts delivered to your In-box?
Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!