Sorption-desorption kinetics and toxic cell concentration in marine phytoplankton microalgae exposed to Linear Alkylbenzene Sulfonate

► LAS toxicity varied among algal groups with green algae presenting the least sensitivity. ► LAS sorption on cells was rapid (steady state within 5 h) and Kss varied among algal groups. ► LAS depuration was rapid (a few hours) but a significant low LAS fraction was still sorbed after 24 h. ► Sorption isotherm presents a typical saturation pattern with differences among algal groups. ► LAS dose response toxic cell concentration illustrates polar narcotic effect.