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. 2018 Jul 9;8:10363. doi: 10.1038/s41598-018-28568-7

Figure 1.

Figure 1

FTIR spectra of Fe-hydroxide (FH), humic acid (YHA and AHA), and HA/Fe coprecipitates containing (a) YHA and (b) AHA with initial C/(C + Fe) ratio of 0.17, 0.29, ad 0.33 (YFC17/29/33 and AFC17/29/33).