Peraluminous granitoids within the Hangloa area, Adamawa-Yadé Domain, Cameroon: Petrogenesis and tectonic implication

Phosphorus recovery alternatives for sludge from chemical phosphorus removal processes – Technology comparison and system limitations

“…However, the quality of the end-product containing vivianite depends on the source material qualities, which is problematic due to the presence of heavy metals and other potential contaminants. Vivianite itself has been reported to have qualities as a slow-release fertilizer [59,60], so purifying it by another process step seems necessary for legislative requirement in agriculture applications and/or a positive image as a fertilizer. Vivianite can also have other uses, such as art pigments [61].…”

“…Still, a brief discussion is presented. Struvite and vivianite, if used as fertilizer, release P slowly [60,90]. Commercially available fertilizers manufactured from phosphate rock have high solubility to maximize the instantaneous P release and plant availability [91].…”