Perchlorate removal in Fe0/H2O systems: Impact of oxygen availability and UV radiation

► Removal of perchlorate in Fe0-only and Fe0/UV reactions under oxic and anoxic conditions. ► Oxic conditions are essential for efficient removal of perchlorate in Fe0-only reaction. ► Perchlorate removal was achieved by adsorption/co-precipitation reactions onto iron oxides. ► Fe0/UV reactions under oxic conditions produce OH radicals which inhibit the removal of perchlorate.