Παρακαλώ χρησιμοποιήστε αυτό το αναγνωριστικό για να παραπέμψετε ή να δημιουργήσετε σύνδεσμο προς αυτό το τεκμήριο: https://hdl.handle.net/20.500.14279/1220
Τίτλος: Long-term phosphorus effects on evolving physicochemical properties of iron and aluminum hydroxides
Συγγραφείς: Harris, Willie G. 
O'Connor, George A. 
El-Shall, Hassan E. 
Makris, Konstantinos C. 
Major Field of Science: Natural Sciences
Field Category: Earth and Related Environmental Sciences
Λέξεις-κλειδιά: Iron and Al hydroxides;Stability;Heat incubations;Microporosity;Specific surface area
Ημερομηνία Έκδοσης: 15-Ιου-2005
Πηγή: Journal of Colloid and Interface Science, 2005, Volume 287, Issue 2, Pages 552–560
Volume: 287
Issue: 2
Start page: 552
End page: 560
Περιοδικό: Journal of Colloid and Interface Science 
Περίληψη: Iron (Fe) and aluminum (Al) hydroxides are highly reactive components in environmental processes, such as contaminant fate and transport. Phosphorus (P) sorption by these components can decrease environmental problems associated with excess accumulation of P in soils. The long-term stability of P sorbed by Fe/Al hydroxides is of major concern. Synthetic Fe and Al hydroxides coprecipitated with P (1:1 metal:P molar ratio) were incubated at 70 °C for 24 months to simulate natural long-term weathering processes that could influence the stability of sorbed P. Heat incubation (70 °C) of the untreated (no P) Al hydroxides resulted in drastic decreases (within the first month of incubation) in oxalate–Al extractability, specific surface area (SSA), and micropore volume with time. These changes were consistent with the formation of pseudoboehmite. Untreated Fe hydroxides showed no formation of crystalline components following heating (70 °C) for 24 months. Much smaller changes in oxalate-Al, P extractability, and SSA values were observed in the P-treated Al particles when compared with the untreated. Phosphorus treatment of both Fe and Al hydroxides stabilized the particle surfaces and prevented structural arrangements toward a long-range ordered phase. Slight reduction in SSA of the P-treated particles was related to dehydration phenomena during heating at 70 °C. Monitoring of physicochemical properties of the solids after heating at 70 °C for 2 years showed that sorbed P may be stable in the long-term. Understanding long term physicochemical properties may help engineers to optimize the Fe/Al hydroxides performance in several environmental/industrial applications.
URI: https://hdl.handle.net/20.500.14279/1220
ISSN: 00219797
DOI: http://dx.doi.org/10.1016/j.jcis.2005.02.011
Rights: © Elsevier Inc.
Type: Article
Affiliation: University of Texas 
University of Florida 
Publication Type: Peer Reviewed
Εμφανίζεται στις συλλογές:Άρθρα/Articles

CORE Recommender
Δείξε την πλήρη περιγραφή του τεκμηρίου

SCOPUSTM   
Citations

36
checked on 13 Φεβ 2018

Page view(s)

544
Last Week
2
Last month
28
checked on 14 Μαρ 2025

Google ScholarTM

Check

Altmetric


Όλα τα τεκμήρια του δικτυακού τόπου προστατεύονται από πνευματικά δικαιώματα