Fig. 4: Characterization of control products.
From: Transformation of siderite to goethite by humic acid in the natural environment
Representative SEM images of the synthesized siderite after reacting with H2O2 (a, b), H2O-DO (d) and HA-anaerobic (f); representative TEM (c) and HRTEM (e) images of the synthesized siderite after reacting with H2O2; (g) The XRD pattern of the synthesized siderite and the precipitates. Samples were freeze-dried for 12 h after 7 days of aging.
