Abstract:
In this study, the treatment of landfill leachate by sono (US) and photo (UV) based advanced oxidation processes (AOPs) was investigated in terms of % color and COD removal, together with electrical
energy per order. Experimental results showed that, the hybrid sono–photo–Fenton (US/UV/Fe2+/
H2
O2
) process has shown that higher removal of color (100%) and COD (96%) with required of low
electrical energy per order (0.71 kWh/m3
) than the other processes. The influence of various experimental parameters such as H2
O2
and Fe2+ concentration, COD concentration, solution pH, sonication
(US) and photo (UV) power on the % color and COD removal with electrical energy per order has
been studied to find out the optimum conditions leading to maximum % removal efficiency of hybrid
US/UV/Fe2+/H2
O2
process. The best results of US/UV/Fe2+/H2
O2 process of landfill leachate have
been obtained using 80 mM of H2
O2
, 40 mM of Fe2+, pH of 3, COD concentration of 2,000 ppm, sonication power of 100 W and UV power of 32 W and after 3 h of reaction time. The synergy index between
sonication (US) and photo–Fenton (UV/Fe2+/H2
O2
) process has been studied and critically reported.
Therefore, the combination of US and UV based AOPs has been proved to be efficient treatment techniques for removal of pollutant from industrial effluent and wastewater.
