Journal ArticleDOI
XANES Investigation of Phosphate Sorption in Single and Binary Systems of Iron and Aluminum Oxide Minerals
TLDR
Adsorption isotherms and XANES data showed evidence for precipitation in goethite/boehmite mixtures, suggesting that mineral interactive effects on PO4 sorption were minimal, but sorption in ferrihydrite/non-xl Al-hydroxide systems and a lack ofXANES evidence for rain indicated that mineral interactions inhibited precipitation in these binary mixtures.Abstract:
Phosphate sorption on Fe- and Al-oxide minerals helps regulate the solubility and mobility of P in the environment. The objective of this study was to characterize phosphate adsorption and precipitation in single and binary systems of Fe- and Al-oxide minerals. Varying concentrations of phosphate were reacted for 42 h in aqueous suspensions containing goethite, ferrihydrite, boehmite, or noncrystalline (non-xl) Al-hydroxide, and in 1:1 (by mass) mixed-mineral suspensions of goethite/boehmite and ferrihydrite/non-xl Al-hydroxide at pH 6 and 22 °C. X-ray absorption near edge structure (XANES) spectroscopy was used to detect precipitated phosphate and distinguish PO4 associated with Fe(III) versus Al(III) in mixed-mineral systems. Changes in the full width at half-maximum height (fwhm) in the white-line peak in P K-XANES spectra provided evidence for precipitation in Al-oxide single-mineral systems, but not in goethite or ferrihydrite systems. Similarly, adsorption isotherms and XANES data showed evidence fo...read more
Citations
More filters
Book ChapterDOI
Analysis of Soils and Minerals Using X-ray Absorption Spectroscopy
TL;DR: X-ray absorption spectroscopy (XAS) has been applied to numerous problems in soil science, mineralogy, and geochemistry as mentioned in this paper, which can be collected on heterogeneous mixtures of gases, liquids, and/or solids with little or no sample pretreatments, making it ideally suited for soils and many other systems.
Journal ArticleDOI
Development of polymer-based nanosized hydrated ferric oxides (HFOs) for enhanced phosphate removal from waste effluents.
Bingjun Pan,Jun Wu,Bingcai Pan,Lu Lv,Weiming Zhang,Lili Xiao,Xiaoshu Wang,Xiancong Tao,Shourong Zheng +8 more
TL;DR: Tests indicate that phosphate retention by HFO-201 from the synthetic waters results in the significant decrease of P from 2mg/L to less than 0.01 mg/L, and that satisfactory performance of the hybrid adsorbent is mainly attributed to the specific affinity of HFO toward phosphate.
Journal ArticleDOI
Phosphate adsorption on hydroxyl–iron–lanthanum doped activated carbon fiber
TL;DR: In this paper, Lanthanum was mixed with iron to obtain the composite metallic (hydr)oxide which are doped onto activated carbon fiber (ACF), named as ACF-LaFe, for phosphate adsorption.
Book ChapterDOI
Phosphate Reaction Dynamics in Soils and Soil Components: A Multiscale Approach
Yuji Arai,Donald L. Sparks +1 more
TL;DR: In this article, the retention/release mechanisms of soil phosphorus (P) chemistry have been investigated using macroscopic to more recent molecular-scale approaches, including inner-sphere complexation and intra-and interparticle diffusion.
Journal ArticleDOI
Selective adsorption of phosphate from seawater and wastewater by amorphous zirconium hydroxide.
TL;DR: The effect of pH on phosphate adsorption from seawater showed that the uptake of phosphate increased with an increase in pH up to 6, and then decreased sharply with a further increase in acidity of the solution.
References
More filters
Journal Article
X-ray absorption : principles, applications, techniques of EXAFS, SEXAFS, and XANES
TL;DR: Theory of X-ray Absorption Spectroscopy (EXAFS) is described in this paper, where the authors present an experimental setup of EXAFS with Synchrotron Radiation.
Journal ArticleDOI
Soil phosphorus saturation degree: Review of some indices and their suitability for P management in Québec, Canada
Suzanne Beauchemin,R. R. Simard +1 more
TL;DR: In this paper, the authors reviewed different indices that have been proposed to estimate the degree of soil P saturation and the relationships between soil saturation degree and P solubility. And they discussed their suitability as environmental indicators for P management in the province of Quebec, Canada, and proposed the ratio of Mehlich-III extractable P to Al (M3P/AlM3) as an alternative.
Journal ArticleDOI
XAFS study of adsorbed and mineral forms of phosphate
TL;DR: Phosphorus KXANES spectra for Fe-phosphates were characterized by a unique pre-edge feature near -3 eV (relative energy) that increased in intensity with increasing mineral crystallinity and was very weak for phosphate adsorbed on goethite.
Journal ArticleDOI
Migration of phosphate into aggregated particles of ferrihydrite
TL;DR: In this article, the slow reaction of phosphate with aggregated particles of ferrihydrite, after initial rapid phosphate sorption, was investigated by measuring the changes, with time and temperature, in the amount of phosphate sorbed, and the extractability of the sorbed phosphate.
Journal ArticleDOI
Describing the effect of time on sorption of phosphate by iron and aluminium hydroxides
TL;DR: In this article, the effect of time on phosphate sorption was examined by plotting the sorption data according to different, simple, kinetic equations such as the first order, second order, the parabolic diffusion equation, the Elovich equation and the modified Freundlich equation.
Related Papers (5)
ATHENA, ARTEMIS, HEPHAESTUS: data analysis for X-ray absorption spectroscopy using IFEFFIT.
Bruce Ravel,Matthew Newville +1 more
ATR-FTIR Spectroscopic Investigation on Phosphate Adsorption Mechanisms at the Ferrihydrite-Water Interface
Yuji Arai,Donald L. Sparks +1 more