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

Author(s)

Borges, Roger ^[1] ; Giroto, Amanda Soares ^[1] ; Klaic, Rodrigo ^{[1, 2]} ; Wypych, Fernando ^[3] ; Ribeiro, Caue ^[1]

Affiliation

^[1] Embrapa Instrumentat, 1452 XV Novembro St, BR-13560970 Sao Carlos, SP - Brazil

^[2] Univ Fed Sao Carlos, Dept Engn Quim, Rod Washington Luiz, Km 235, BR-13565905 Sao Carlos, SP - Brazil

^[3] Univ Fed Parana, Dept Quim, CP 19032, BR-81531980 Curitiba, PR - Brazil

• Document type: Journal article
• Source: ADVANCED POWDER TECHNOLOGY; v. 32, n. 11, p. 4070-4077, NOV 2021.
• Web of Science Citations: 0

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 a 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 similar to 5, which comprises a large part of many countries soils. (C) 2021 The Society of Powder Technology Japan. Published by Elsevier B.V. and The Society of Powder Technology Japan. All rights reserved. (AU)

• FAPESP's process: 16/10636-8 - From the cell factory to the Biodiesel-Bioethanol integrated biorefinery: a systems approach applied to complex problems in micro and macroscales
• Grantee: Roberto de Campos Giordano
• Support Opportunities: Program for Research on Bioenergy (BIOEN) - Thematic Grants
• FAPESP's process: 18/10104-1 - Nanocomposites Preparation from Urea modified with Glycerol for optimization of Process of Controlled Release of Nutrients
• Grantee: Amanda Soares Giroto
• Support Opportunities: Scholarships in Brazil - Post-Doctoral