Sorption of paralytic shellfish toxins (PSTs) in algal polysaccharide gels

Sorption mechanics of the paralytic shellfish toxins (PSTs), saxitoxin (STX) and neo-saxitoxin (neo-STX), on algal polysaccharide gels was characterized using surface chemistry models. Refined (RC), semi-refined (SRC) carrageenan and alginate showed sorption of STX and neo-STX. The sorption of PSTs...

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Bibliographic Details
Published in:Algal research (Amsterdam) 2020-01, Vol.45, p.101655, Article 101655
Main Authors: Olano, Dave Eldon B., Salvador-Reyes, Lilibeth A., Montaño, Marco Nemesio E., Azanza, Rhodora V.
Format: Article
Language:English
Subjects:
Agar
Algal polysaccharides
Alginate
Carrageenan
Paralytic shellfish toxins
Saxitoxin
Sorption
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Summary:Sorption mechanics of the paralytic shellfish toxins (PSTs), saxitoxin (STX) and neo-saxitoxin (neo-STX), on algal polysaccharide gels was characterized using surface chemistry models. Refined (RC), semi-refined (SRC) carrageenan and alginate showed sorption of STX and neo-STX. The sorption of PSTs on RC, SRC and alginate was affected by contact time and in part, temperature. From surface chemistry models, alginate followed a spontaneous endothermic physical monolayer sorption of STX and neo-STX. SRC and RC favoured the concurrence of physical and chemical monolayer sorption, being endothermic for SRC and exothermic for RC. •Sorption of STX and neo-STX in agar, alginate and carrageenan were evaluated.•Alginate and carrageenan, but not agar, showed sorption of STX and neo-STX.•Sorption of PSTs was affected by contact time and in part, temperature.•Alginate showed spontaneous endothermic physical monolayer sorption of STX and neo-STX.•Carrageenans favoured the concurrence of spontaneous physical and chemical monolayer sorption.
ISSN:2211-9264
2211-9264
DOI:10.1016/j.algal.2019.101655