Agriculture and Food Chemistry

Mechanochemical synthesis of eco-friendly fertilizer from eggshell (calcite) and KH2PO4



The present article, based on reverse logistic, provides an environmentally beneficial and cost-effective method of producing calcium phosphate bioceramics (potassium calcium phosphates) aimed for soil conditioning, by a free-solvent mechanochemical process between eggshell waste and KH2PO4. The K3CaH(PO4)2 and possibly CaKPO4 phases formed provide better nutrient management of P, K and Ca, when applied in soil system the material first release K and form hydroxyapatite and important P and Ca bioavailable source at pH ~ 5, which comprises a large part of many countries soils.


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Supplementary material

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List of supplementary Tables, Figures and schemes
This file contains Materials and methods supplementary, Tables, and Figures.