Effluent treatment using electrochemically bleached seawater-oxidative degradation of pollutants.
Use of seawater electrolytically enriched with hypochlorite and the in situ generation of hypochlorite on the high seas, stand a good chance for disinfection and decrease of bio and non-biodegradable organics in effluent before discharged into estuaries and deep oceans. Enriched seawater effectively decreased the biological oxygen demand measured over 5 days (BOD) and chemical oxygen demand (COD) levels of semi-treated wastewater. The oxidative degradation of Brilliant Blue, a triaryl industrial dye by hypochlorite and electrolytically enriched seawater are compared at pH 6.5. Both had similar magnitude second-order rate constants (21+/-1M(-1)s(-1)) and procedure is feasible. Increase in acid concentration enhanced the reaction rate. With 1:1 and 1:100 molar ratios of dye to hypochlorite, the COD=140mgL(-1) of 1.0x10(-3)M dye reduced to 100 and 30mgL(-1) respectively.
Jonnalagadda
S B
SB
Department of Chemistry, University of Durban-Westville, P. Bag X54001, Durban 4000, South Africa.
Nadupalli
S
S