Original ResearchPublished 20 July 2026Adsorption-membrane filtration hybrid method for separation of lithium from geothermal water and its reverse osmosis concentrate by spinel type λ-MnO 2Kamil Bostancı · Başak Sever · Esra Altıok · Yakubu Abdullahi Jarma · Nalan Kabay · Müşerref Arda · Syouhei Nishihama · Kazuharu YoshizukaFrontiers in Membrane Science and Technologydoi 10.3389/frmst.2026.1843267