fig4
![Selective recovery of Pb(II) from a waste electrolyte via ion flotation with iminodiacetic acid-functionalized graphene oxide as a nanocollector](https://image.oaes.cc/4cb72069-28e0-48f7-a6e5-8a7219a15289/4852.fig.4.jpg)
Figure 4. Pb(II) adsorption on IDA@GO and GO as a function of pH (Pb(II) concentration of 50 mg/L, GO and IDA@GO concentration of 100 mg/L and reaction time of 120 min). IDA@GO: Iminodiacetic acid-functionalized graphene oxide; GO: graphene oxide.