- Polymeric and inorganic sorbents as a green option to recover critical raw materials at trace levels from sea saltwork bitterns(2023-01-05) Cortina, José Luis; Chemical Engineering Department, Escola d'Enginyeria de Barcelona Est (EEBE), Universitat Politècnica de Catalunya (UPC)-BarcelonaTECH; Barcelona Research Center for Multiscale Science and Engineering; CETaqua-Cortina, José Luis