Removal of Pb(II) from Aqueous Solutions with Manganese Oxide-Modified Diatomite

Figure 7

FT-IR spectra of natural diatomite, Mn/diatomite, Mn/diatomite after Pb(II) adsorption, and MnO₂: (a) wavenumber region 4000-400 cm^-1; (b) wavenumber region 600-400 cm^-1.

(a)

(b)