Fig. 4. Effect of pH on the semiquinone free radicals content of humic acid (HA) (–
–) and imazaquin (IM)–HA (–
–) complexes (HA = 0.8 g L-1 and IM = 30 mg L-1). Standard error bars are presented.
Fig. 4. Effect of pH on the semiquinone free radicals content of humic acid (HA) (––) and imazaquin (IM)–HA (––) complexes (HA = 0.8 g L-1 and IM = 30 mg L-1). Standard error bars are presented.