Εξειδίκευση τύπου :	Άρθρο σε επιστημονικό περιοδικό
Τίτλος:	Phosphate recovery from real fresh urine by Ca(OH)2 treated natural zeolite
Δημιουργός/Συγγραφέας:	Mitrogiannis D. Psychoyou M. Koukouzas N. Tsoukalas N. [EL] Παλλές, Δημήτρης[EN] Palles, Dimitris [EL] Καμίτσος, Ευστράτιος Ι.[EN] Kamitsos, Efstratios I. Pantazidis A. Oikonomou G. Baziotis I.
Εκδότης:	Elsevier B.V.
Ημερομηνία:	2018
Γλώσσα:	Αγγλικά
ISSN:	1385-8947
DOI:	10.1016/j.cej.2018.04.102
Περίληψη:	Source-separation of urine can provide an alternative way for wastewater treatment and nutrients recovery by adsorbents which then can be applied in the agriculture as fertilizer. In this work, natural (NZ) and Ca(OH)2 treated zeolite (CaT-Z) were employed in batch tests for adsorption of phosphate phosphorus (P) from real fresh urine (FU). Total P removal was a simultaneous process of adsorption on NZ or CaT-Z surface and precipitation in the liquid phase as Ca-P and Mg-P containing precipitates. In the presence of CaT-Z, the contribution of adsorption on total P removal was higher than that of the liquid phase precipitation at all dilution ratios of FU with deionized water. Lower residual P concentrations in FU and more P bound on the adsorbent were observed for CaT-Z than for NZ. The sequential desorption study showed that 55.1–84.9% and 6.2–72.6% of total removed P was recovered from FU loaded CaT-Z and NZ, respectively. In less diluted FU, CaT-Z adsorbed much more P (up to 11.11 mg/g) than NZ due to the dominant contribution of inner-sphere complexation (ligand exchange). In more diluted FU, outer-sphere complexation was the major P adsorption mechanism accompanied by ligand exchange. Phosphorus removal by CaT-Z reached an equilibrium in 72–96 h. Bulk (XRD, IR-ATR) and in-situ (EPMA, SEM-EDS) analytical techniques clarified the adsorption mechanisms and confirmed the accommodation of Ca-P phases on NZ and CaT-Z. The results of the study suggested the suitable use of CaT-Z for simultaneous PO4-P and NH4-N recovery from human urine.
Τίτλος πηγής δημοσίευσης:	Chemical Engineering Journal
Τόμος/Κεφάλαιο:	347
Σελίδες:	618-630
Θεματική Κατηγορία:	[EL] Φυσική και θεωρητική χημεία[EN] Physical and theoretical chemistry
Λέξεις-Κλειδιά:	Human urine Ligand exchange Phosphate recovery Precipitation Zeolite
Αξιολόγηση από ομότιμους (peer reviewed):	Ναι
Κάτοχος πνευματικών δικαιωμάτων:	© 2018 Elsevier B.V.
Εμφανίζεται στις συλλογές:	Ινστιτούτο Θεωρητικής και Φυσικής Χημείας (ΙΘΦΧ) - Επιστημονικό έργο