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

20 July 2021, Version 1
Working Paper
This content is a preprint and has not undergone peer review at the time of posting.

Abstract

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.

Supplementary materials

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Version History

Jul 20, 2021 Version 1

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The content is available under CC BY 4.0 [opens in a new tab]

DOI

10.26434/chemrxiv-2021-1qw19
D O I: 10.26434/chemrxiv-2021-1qw19 [opens in a new tab]

Funding

FAPESP
2016/10636-8 and 2018/10104-1
CNPq
301743/2018-5

Author’s competing interest statement

The author(s) have declared they have no conflict of interest with regard to this content

Ethics

The author(s) declare that they have sought and gained approval from the relevant ethics committee/IRB for this research and its publication.

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