Original ResearchPublished 27 August 2026Phosphate-rich municipal wastewater treatment using magnetite nanoparticles dispersed oakwood biochar-assisted pretreatment followed by air-gap membrane distillationPrashan M. Rodrigo · Bishweshwar Pant · Sunith B. Madduri · Raghava R. KommalapatiFrontiers in Membrane Science and Technologydoi 10.3389/frmst.2026.1918400