Environmental context. Deionisation of salt waters is of increasing importance and interest mainly due to the scarcity of fresh water. In a single through pass capacitive deionisation, a relatively high electrosorption efficiency (25%) was observed. Simultaneously, a high disinfection efficiency (97%) was also obtained. This study shows that the new Ag@C/rGO electrodes are feasible for simultaneous deionisation and disinfection of saltwater as a potential source of drinking water.

Environmental context. Due to The Montreal Protocol, stratospheric ozone concentration is slowly regenerating, however, the recovery rate is slower than predicted by photochemical models. FTIR spectroscopy together with quantum chemical calculations confirmed that ozone reacts with halogenated acids adsorbed at the model aerosol surface. Reactions occur at low temperatures without photochemical activation with formation of halogen oxides that are known to promote catalytic cycles of ozone depletion.