Regranulated cork particles are by-products of cork stopper production, which present very high hydrophobicity and oil sorption capacity after thermal treatment [1]. These thermally treated granules have been used as absorbents in the remediation of oil spills under the commercial brand Corksorb (Corticeira Amorim, S.G.P.S.). Once saturated with oil, cork should be regenerated for cyclic reuse. For that, hydroc...