The removal of CAAs by iron increased first and then
decreased with increasing the DO concentration from 0 to7.09 mg/L. The susceptibility of CAA reduction improved by O2
followed the order of MCAA, DCAA, and lastly TCAA. As a
desirable CAA degradation product, AA was optimally transformed
at 1.52 mg/L DO. The variation of available reducing
agents and corrosion coatings was responsible for CAA removals
at various DO concentrations. Various CAA removal
mechanisms facilitate the preliminary prediction on the effect
of DO concentration on iron efficiency towards the treatment
of contaminants in surface water and wastewater