Rate enhancing effect of bromide on the removal of ammonia at Ti/PbO2 anode.
Electrochemical oxidation of ammonium (NH4+) at Ti/PbO2 anode in chloride-free and chloride containing aqueous solutions was studied. The experimental results have shown that oxidation of NH4- is ensured only in the presence of chloride. The oxidation of NH4+ is found to follow pseudo first-order kinetics. Bromide in the electrolyte is found to cause substantial rate enhancing effect on the ammonium removal. The dependence of k on the current density as well as halide concentration is also discussed in this study.
Neti
Nageswara Rao
NR
National Environmental Engineering Research Institute, Nehru Marg, Nagpur--440020, India. wwtdiv@nagpur.dot.net.in
Killedar
Deepak
D
Kaul
Santosh Narain
SN
D000641:Ammonia / Q000737:chemistry / Q000302:isolation & purification*; D001965:Bromides / Q000737:chemistry*; D004396:Coloring Agents / Q000737:chemistry; D004563:Electrochemistry; D007700:Kinetics; D007854:Lead / Q000737:chemistry*; D010087:Oxides / Q000737:chemistry*; D014025:Titanium / Q000737:chemistry; D014865:Waste Disposal, Fluid / Q000379:methods*; D018508:Water Purification / Q000379:methods*
D001965:Bromides; D004396:Coloring Agents; D010087:Oxides; C009495:titanium dioxide; D007854:Lead; C047365:lead oxide; D000641:Ammonia; D014025:Titanium