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. 2022 Oct 25;12:17885. doi: 10.1038/s41598-022-22683-2

Figure 7.

Figure 7

(a) Zetapotential and (b) ATR-FTIR spectra of adsorbed orthophosphate, polyphosphates, and orthophosphate–polyphosphates at pH 7.0. Orthophosphate:polyphosphate ratios are presented in brackets. Reference ATR-FTIR spectra of free orthophosphate and polyphosphate solutions are presented as solid black lines. All ATR-FTIR spectra were recorded in a DIC 5 mg C L−1 electrolyte solution.