Fig. 3
From: Transformation and fate of Fe(III) in petroleum-hydrocarbon-contaminated soil and groundwater
Relative proportions of Fe species present in soils which were sampled from a three-meter soil core. The three-meter soil core was taken \(\sim\)14.2 m from the injection point of the remedial solution, adjacent to one of the monitoring wells from which colloids were sampled. a Soil core taken before injection of the remedial solution (week-zero); b Soil core taken after 22.5 weeks of remedial solution injection. Species percentages were obtained from linear combination fitting (LCF) of Fe K-edge XANES. The blue bars, Fe(III)–OM, represent Fe(III)–organic matter coprecipitate