Recovery of slow-release multi-nutrient matrix from dairy manure through acid-mediated mild hydrothermal treatment.

Λεπτομέρειες βιβλιογραφικής εγγραφής
Τίτλος:	Recovery of slow-release multi-nutrient matrix from dairy manure through acid-mediated mild hydrothermal treatment.
Συγγραφείς:	Devnath B; Department of Chemistry and Chemical Engineering, Florida Institute of Technology, 150 West University Boulevard, Melbourne 32901, FL, USA., Gao B; Department of Civil and Environmental Engineering, Rensselaer Polytechnic Institute, 4002 Jonsson Engineering Center, Troy 12180, NY, USA., Reza T; Department of Chemistry and Chemical Engineering, Florida Institute of Technology, 150 West University Boulevard, Melbourne 32901, FL, USA. Electronic address: treza@fit.edu.
Πηγή:	Waste management (New York, N.Y.) [Waste Manag] 2026 Sep 10; Vol. 224, pp. 115732. Date of Electronic Publication: 2026 Jul 15.
Τύπος έκδοσης:	Journal Article
Γλώσσα:	English
Στοιχεία περιοδικού:	Publisher: Pergamon Press Country of Publication: United States NLM ID: 9884362 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1879-2456 (Electronic) Linking ISSN: 0956053X NLM ISO Abbreviation: Waste Manag Subsets: MEDLINE
Imprint Name(s):	Original Publication: New York : Pergamon Press, c1989-
Ιατρικοί όροι (MeSH):	Manure/analysis , Nutrients/analysis , Waste Management*/methods, Nitrogen/analysis ; Phosphorus/analysis ; Fertilizers/analysis ; Soil/chemistry ; Metals, Heavy/analysis ; Animals ; Dairying ; Hydrogen-Ion Concentration
Περίληψη:	Global agriculture increasingly demands sustainable soil fertilization strategies that balance nutrient efficiency with the preservation of environmental safety. Here, we demonstrate a novel integrated approach coupling acid mediated mild hydrothermal treatment (HT) of dairy manure at 120, 140, 160 °C with alkaline precipitation to synthesize a slow-release multi-nutrient matrix (SRMNM) that achieves pH responsive controlled nutrient availability through inherent material properties. SEM-EDX, XRD, and FTIR analyses confirmed an amorphous, mineral-rich matrix of the produced SRMNM, achieving nitrogen content of 1.10-1.31%, phosphorus of 4.36-4.79%, and potassium of 6.74-7.09%. Micronutrient profiles included zinc (39.6-48.0 mg kg⁻¹), copper (71.4-76.3 mg kg⁻¹), and manganese (209-226 mg kg⁻¹), all within nutritional ranges for plant growth. The contrasting nutrient release profiles; near-complete retention (99.5-99.8%) in deionized water versus near-complete mobilization (70.8-98.6%) under citric acid extraction, supporting the slow-release potential of the recovered matrix, confirming that SRMNM resists nutrient loss in bulk soil while remaining bioavailable in the rhizosphere. All heavy metal concentrations remained below U.S. EPA biosolids standards (40 CFR 503.13) with limited bioavailability. This integrated approach uniquely valorizes dairy waste into a multi-nutrient matrix with slow-release potential combining amorphous mineral architecture with inherent pH-responsive nutrient bioavailability, advancing sustainable nutrient management in circular agricultural systems. (Copyright © 2026 The Author(s). Published by Elsevier Ltd.. All rights reserved.)
Competing Interests:	Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
Contributed Indexing:	Keywords: Acid leaching; Fertilizer; Hydrothermal carbonization; Manure; Nutrient Recovery
Substance Nomenclature:	0 (Manure) N762921K75 (Nitrogen) 27YLU75U4W (Phosphorus) 0 (Fertilizers) 0 (Soil) 0 (Metals, Heavy)
Entry Date(s):	Date Created: 20260715 Date Completed: 20260801 Latest Revision: 20260801
Update Code:	20260802
DOI:	10.1016/j.wasman.2026.115732
PMID:	42456596
Βάση Δεδομένων:	MEDLINE

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Περιγραφή
ISSN:	1879-2456
DOI:	10.1016/j.wasman.2026.115732