A spectroscopic investigation of phosphate adsorption onto iron oxides

1996 ◽  
Vol 14 (3) ◽  
pp. 1357-1361 ◽  
Author(s):  
M. G. Nooney ◽  
T. S. Murrell ◽  
J. S. Corneille ◽  
E. I. Rusert ◽  
L. R. Hossner ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Spectroscopic Investigation ◽  
Phosphate Adsorption

Influence of organic matter on phosphate adsorption by aluminium and iron oxides in sandy soils

1990 ◽  
Vol 41 (3) ◽  
pp. 443-449 ◽  
Author(s):  
O. K. BORGGAARD ◽  
S. S. JDRGENSEN ◽  
J. P. MOBERG ◽  
B. RABEN-LANGE
Keyword(s):  
Organic Matter ◽  
Iron Oxides ◽  
Sandy Soils ◽  
Phosphate Adsorption

The Maximum of Phosphate Adsorption at pH 4.0: Why It Appears on Aluminum Oxides but Not on Iron Oxides

Langmuir ◽  
2009 ◽  
Vol 25 (8) ◽  
pp. 4450-4461 ◽  
Author(s):  
Xiao Huang ◽  
Gregory D. Foster ◽  
Robert V. Honeychuck ◽  
John A. Schreifels
Keyword(s):  
Iron Oxides ◽  
Phosphate Adsorption ◽  
Aluminum Oxides

Kinetics of phosphate adsorption on iron oxides formed under the influence of citrate

2000 ◽  
Vol 80 (3) ◽  
pp. 445-454 ◽  
Author(s):  
C. Liu ◽  
P. M. Huang
Keyword(s):  
Activation Energy ◽  
Citric Acid ◽  
Organic Acids ◽  
Surface Chemistry ◽  
Iron Oxides ◽  
Phosphate Adsorption ◽  
Exponential Factor ◽  
Structural Perturbation ◽  
Fe Oxides ◽  
The Impact

The influence of organic acids on the formation of Fe oxyhydroxides and oxides has been intensively studied. However, scant attention has been paid to the subsequent effect on surface chemistry of the Fe oxides formed. The kinetics and mechanisms of phosphate adsorption by the Fe oxides formed in the presence of citrate ligands at initial citrate/Fe(II) molar ratios (MR) of 0, 0.001, 0.01, and 0.1 were investigated using the conventional batch method. The adsorption studies were conducted at the initial phosphate concentration of 0.5 mM and pH 4.0 during the reaction period from 2 min to 56 h at 278, 288, 298, and 313 K. The results show that the phosphate adsorption followed multiple second-order kinetics and had two distinct rates in each reaction system. The amount, rate coefficient, activation energy and pre-exponential factor of phosphate adsorption by the Fe oxides formed greatly varied with their structural and surface properties. These properties, which included crystal structure, specific surface area, surface porosity, surface geometry, and point of zero salt effect (PZSE), differed significantly with the initial citrate/Fe(II) MR at which Fe oxides were formed. The results of this study have cast the light on the role of organic acids such as citric acid in influencing the surface chemistry of naturally occurring Fe oxides through fundamental structural perturbation and the impact on the dynamics of phosphate in terrestrial and aquatic environments. Key words: Kinetics, activation energy, pre-exponential factor, phosphate, iron oxides, citric acid, structural perturbation

Phosphate adsorption performance and mechanisms by nanoporous biochar–iron oxides from aqueous solutions

2020 ◽  
Vol 27 (22) ◽  
pp. 28132-28145
Author(s):  
Zhaoran Zhang ◽  
Haiqin Yu ◽  
Rixin Zhu ◽  
Xue Zhang ◽  
Liangguo Yan
Keyword(s):  
Aqueous Solutions ◽  
Iron Oxides ◽  
Phosphate Adsorption ◽  
Adsorption Performance

Sorption of Arsenite, Arsenate, and Thioarsenates to Iron Oxides and Iron Sulfides: A Kinetic and Spectroscopic Investigation

2013 ◽  
Vol 47 (11) ◽  
pp. 5652-5659 ◽  
Author(s):  
R.-M. Couture ◽  
J. Rose ◽  
N. Kumar ◽  
K. Mitchell ◽  
D. Wallschläger ◽  
...  
Keyword(s):  
Iron Oxides ◽  
Spectroscopic Investigation ◽  
Iron Sulfides

Influence of humic substances on phosphate adsorption by aluminium and iron oxides

Geoderma ◽  
2005 ◽  
Vol 127 (3-4) ◽  
pp. 270-279 ◽  
Author(s):  
O.K. Borggaard ◽  
B. Raben-Lange ◽  
A.L. Gimsing ◽  
B.W. Strobel
Keyword(s):  
Humic Substances ◽  
Iron Oxides ◽  
Phosphate Adsorption
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