Abstract:
The process of pesticide removal from industrial wastewater
using which chemical, vacuum-chemical and Fenton's
reactions have been analyzed. Fenton process is attractive
alternative to conventional oxidation processes in effluent
treatment of recalcitrant compounds. The aim of this study is
to evaluate the efficiency of chemical, vacuum and Fenton
processes for the reduction of chemical oxygen demand in
wastewaters from pesticide industry. In this study wastewater
from pesticide industry was used. Whereas in the chemical
procedure [Ca(OH)2 and KMnO4], the chemical oxygen
demand removal efficiency is 94.9 %; in the vacuum-Ca(OH)2
+ KMnO4 system (with 250 mg/L KMnO4, 1 mL H2SO4, 5
mg/L polyelectrolyte and 2000 mg/L CaOH application) this
efficiency was 97.8 %; and a 99.8 % KOI removal efficiency
was obtained by the Fenton process (the optimum ratio of
[Fe2+] to [H2O2] was 1:1.56 (mM/mM), at pH 3.0).