fig2

Figure 2. Zeta potentials of IDA@GO, IDA@GO-Pb(II) and IDA@GO-Pb(II)-CTAB. CTAB: Cetyl trimethyl ammonium bromide. IDA@GO: iminodiacetic acid-functionalized graphene oxide.
Figure 2. Zeta potentials of IDA@GO, IDA@GO-Pb(II) and IDA@GO-Pb(II)-CTAB. CTAB: Cetyl trimethyl ammonium bromide. IDA@GO: iminodiacetic acid-functionalized graphene oxide.
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