Effect of Fe/Al Hydroxides on Desorption of K+ and NH+4 from Two Soils and Kaolinite

doi:10.1016/S1002-0160(12)60082-4

Pedosphere

Volume 23, Issue 1, February 2013, Pages 81-87

https://doi.org/10.1016/S1002-0160(12)60082-4 Get rights and content

Abstract

Potassium (K) and nitrogen (N) are essential nutrients for plants. Adsorption and desorption in soils affect K⁺ and NH⁺₄ availabilities to plants and can be affected by the interaction between the electrical double layers on oppositely charged particles because the interaction can decrease the surface charge density of the particles by neutralization of positive and negative charges. We studied the effect of iron (Fe)/aluminum (Al) hydroxides on desorption of K⁺ and NH⁺₄ from soils and kaolinite and proposed desorption mechanisms based on the overlapping of diffuse layers between negatively charged soils and mineral particles and the positively charged Fe/Al hydroxide particles. Our results indicated that the overlapping of diffuse layers of electrical double layers between positively charged Fe/Al hydroxides, as amorphous Al(OH)₃ or Fe(OH)₃, and negatively charged surfaces from an Ultisol, an Alfisol, and a kaolinite standard caused the effective negative surface charge density on the soils and kaolinite to become less negative. Thus the adsorption affinity of these negatively charged surfaces for K⁺ and NH⁺₄ declined as a result of the incorporation of the Fe/Al hydroxides. Consequently, the release of exchangeable K⁺ and NH⁺₄ from the surfaces of the soils and kaolinite increased with the amount of the Fe/Al hydroxides added. The greater the positive charge on the surfaces of Fe/Al hydroxides, the stronger was the interactive effect between the hydroxides and soils or kaolinite, and thus the more release of K⁺ and NH⁺₄. A decrease in pH led to increased positive surface charge on the Fe/Al hydroxides and enhanced interactive effects between the hydroxides and soils/kaolinite. As a result, more K⁺ and NH⁺₄ were desorbed from the soils and kaolinite. This study suggests that the interaction between oppositely charged particles of variable charge soils can enhance the mobility of K⁺ and NH⁺₄ in the soils and thus increase their leaching lsos.

References (20)

J. Chorover et al.
Surface charge evolution of mineral-organic complexes during pedogenesis in Hawaiian basalt
Geochim. Cosmochim. Ac.
(2004)
T. Hou et al.
Interaction between electric double layers of kaolinite and Fe/Al oxides in suspensions
Colloid. Surface. A.
(2007)
T. Hou et al.
Interaction between electrical double layers of soil colloids and Fe/Al oxides in suspensions
J. Colloid Interf. Sci.
(2007)
J. Jiang et al.
Comparison of the surface chemical properties of four variable charge soils derived from quaternary red earth as related to soil evolution
Catena.
(2010)
J. Jiang et al.
Surface chemical properties and pedogenesis of tropical soils derived from basalts with different ages in Hainan, China
Catena.
(2011)
S.Z. Li et al.
Electrical double layers' interaction between oppositely charged particles as related to surface charge density and ionic strength
Colloid. Surface. A.
(2008)
N.P. Qafoku et al.
Variable charge soils: their mineralogy, chemistry and management
Adv. Agron.
(2004)
E. Tombácz et al.
The role of reactive surface sites and complexation by humic acids in the interaction of clay mineral and iron oxide particles
Org. Geochem.
(2004)
R.J. Atkinson et al.
Adsorption of potential-determining ions at the ferric oxide-aqueous electrolyte interface.
J. Phys. Chew
(1967)
G. Bellini et al.
Anion transport through columns of highly weathered acid soil: Adsorption and retardation
Soil Sci. Soc. Am.
(1996)

There are more references available in the full text version of this article.

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: Supported by the Knowledge Innovation Program Foundation of the Chinese Academy of Sciences (No. KZCX2-EW-405) and the National Natural Science Foundation of China (Nos. 40971135 and 40901110).

View full text

Effect of Fe/Al Hydroxides on Desorption of K+ and NH+4 from Two Soils and Kaolinite

Abstract

Geochim. Cosmochim. Ac.

Colloid. Surface. A.

J. Colloid Interf. Sci.

Catena.

Catena.

Colloid. Surface. A.

Adv. Agron.

Org. Geochem.

Adsorption of potential-determining ions at the ferric oxide-aqueous electrolyte interface.

J. Phys. Chew

Anion transport through columns of highly weathered acid soil: Adsorption and retardation

Soil Sci. Soc. Am.

Effect of Fe/Al Hydroxides on Desorption of K⁺ and NH⁺₄ from Two Soils and Kaolinite