Fig. 4: Characterization of prepared slow-release nano fulvic-like acid fertilizer (SRNFF).
From: Waste milk humification product can be used as a slow release nano-fertilizer
Scanning electron microscopy (SEM) images of (A) freeze-dried waste milk (WM), (B) product, (C) attapulgite (ATP) and (D) SRNFF. E Fourier transform infrared spectrometer (FTIR) spectra and (F) X-ray diffraction (XRD) patterns of product, ATP and SRNFF. Humification conditions: [persulfate potassium]0 = 80 g/L, [KOH]0 = 80 g/L, ambient temperature = 22 ± 1 oC, reaction time = 1 h. Each experiment was performed three times independently with similar results. Source data are provided as a Source Data file.
