Catalytic denitrification: direct and indirect removal of nitrates from potable water

摘要: Abstract A nitrate removal process that drastically reduces salt consumption and waste discharge has been developed on a bench scale. Nitrate is removed by chloride ion exchange, the strong-base anion resin completely regenerated at mild reaction conditions (i.e., ambient temperature, atmospheric pressure) in closed circuit containing single-flow fixed-bed reactor packed with Pd–Cu/γ-Al 2 O 3 catalyst. The combined treatment system avoids direct contact between denitrification water to be treated, minimizes operational problems associated each separate technique. No dissolution of Pd Cu metallic-phases was observed given operating conditions.