Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Interactions of Real Urine with Modified Palygorskite and Zeolite Focusing on Adsorption Mechanisms, Nutrient Bioavailability and Soil Conditioner Upgrade
Δημιουργός/Συγγραφέας:	Mitrogiannis, Dimitris Psychogiou, Maria Bourazas, Konstantinos [EL] Παλλές, Δημήτρης[EN] Palles, Dimitris [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Mavrogonatos, Constantinos Baziotis, Ioannis
Ημερομηνία:	2023
Γλώσσα:	Αγγλικά
ISSN:	0049-6979 1573-2932
DOI:	10.1007/s11270-023-06414-5
Περίληψη:	Nutrient recovery from urine can contribute to sustainable crop production. However, the efficient reuse of adsorbed nutrients depends on their bioavailability, a characteristic that is typically disregarded. In this study, Ca(OH)2-treated zeolite (CaT-Zeol) and palygorskite (CaT-Pal) were compared as one-time adsorbents of PO4-P and NH4-N in aqueous solutions and real human urine. Desorption tests were conducted to determine the real solid concentration of nutrients after adsorption in fresh (FU) and hydrolyzed urine (HU). They revealed that (i) CaT-Zeol immobilized more P (6.27–6.79 mg/g) than CaT-Pal (5.35–5.68 mg/g), and (ii) drying the loaded adsorbents at 35 or 105 °C slightly affected the total P desorption. Both materials adsorbed less P from the alkaline HU (1.92 mg/g CaT-Zeol and 0.50 mg/g CaT-Pal) than from the slightly acidic FU. The calcium-bound P predominated on the FU-loaded adsorbents, followed by the plant-available NaHCO3-P. Compared to the CaT-Pal (0.09–0.61 mg N/g), the desorption of plant-available NH4-N from the FU- and HU-loaded CaT-Zeol (1.72–8.07 mg N/g) was significantly higher. SEM–EDS analyses confirmed the formation of calcium phosphate phases on the FU-loaded adsorbents. The IR-ATR spectra indicated the NH4-N presence on the FU- and HU-loaded CaT-Zeol as well as the phosphate adsorption via ligand exchange on both geosorbents. In conclusion, both materials are better suited for P adsorption in FU than in HU, with CaT-Zeol being more effective than CaT-Pal as a dual adsorbent in FU and HU. The overall findings demonstrate the upgrade of both soil-friendly materials after adsorbing plant-available nutrients.
Τίτλος πηγής δημοσίευσης:	Water, Air, & Soil Pollution
Τόμος/Κεφάλαιο:	234
Τεύχος:	6
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry [EL] Φασματοσκοπία[EN] Spectroscopy
Λέξεις-Κλειδιά:	human urine phosphate ammonium palygorskite zeolite adsorption
Κάτοχος πνευματικών δικαιωμάτων:	© The Author(s), under exclusive licence to Springer Nature Switzerland AG 2023
Ηλεκτρονική διεύθυνση στον εκδότη (link):	https://doi.org/10.1007/s11270-023-06414-5
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο