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Updated: Aug 7, 2026

Early Detection of Cyanobacterial Blooms and Associated Cyanotoxins using Fast Detection Strategy
Published on: February 25, 2021
Neurotoxic and hepatotoxic cyanotoxins removal by nanofiltration
Margarida Ribau Teixeira1, Maria João Rosa
1CIMA, Centre of Marine and Environmental Research, Faculty of Marine Sciences and Environment, University of Algarve, Campus de Gambelas, 8005-139 Faro, Portugal. mribau@ualg.pt
Abstract:
This study investigates the influence of chemical feed characteristics on nanofiltration performance for cyanotoxins removal, namely the neurotoxic anatoxin-a (alkaloid of 166 g/mol, positively charged) and the hepatotoxic microcystins (cyclic peptides of approximately 1,000 g/mol, negatively charged). Results indicate that NF membranes are an effective barrier against anatoxin-a and microcystins in drinking water. Anatoxin-a and especially microcystins were almost completely removed, regardless of the variations in feed water quality (natural organic matter and competitive toxin), the water recovery rate and the pH values. Anatoxin-a removal was governed by electrostatic interactions and steric hindrance, whereas for microcystins the latter was the main mechanism. In turn, fluxes were significantly impacted by background organics and, especially, inorganics (pH, calcium).
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