Figure 3From: Preliminary assessment of the performance of oyster shells and chitin materials as adsorbents in the removal of saxitoxin in aqueous solutions Freundlich isotherms for the adsorption of STX onto chitin and OPS at 25°C with a pH of (A) 5.0 (p <0.05) and (B) 7.0 (p <0.05). Back to article page