The Effect of Dissolved Humic Acids on Aluminosilicate Formation and Associated Carbon Sequestration
Joint Authors
Phillips, Brian L.
Rouff, Ashaki A.
Cochiara, Stacey G.
Nagy, Kathryn L.
Source
Applied and Environmental Soil Science
Issue
Vol. 2012, Issue 2012 (31 Dec. 2012), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2012-03-15
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Earth Science , Water and Environment
Abstract EN
Allophane and imogolite neogenesis in soils may occur in the presence of organic matter.
To understand this process under conditions relevant to soils, the influence of dissolved organic carbon (DOC) as humic acid (HA), on aluminosilicate formation was studied at 25C∘, pH 6, and low-DOC concentrations.
For solutions with initial Al/Si ratios of 1–2.1, and 0–6 mg/L DOC, precipitates recovered after 20 h had Al/Si ratios of 2.2–2.7.
The formation of allophane, imogolite-like material, and aluminosilicate gel was confirmed by XRD, FTIR, and NMR.
The effect of DOC was to produce a small, but systematic increase in imogolite-like Si in the precipitate, and a decrease in the formation of aluminosilicate gel.
Results suggest that the presence of DOC as HA slows the otherwise rapid polymerization of Al and Si at low temperature, and may also promote the formation of imogolite.
The high C content of these precipitates indicates that this process may facilitate the sequestration of organic matter, slowing C cycling in soils.
American Psychological Association (APA)
Rouff, Ashaki A.& Phillips, Brian L.& Cochiara, Stacey G.& Nagy, Kathryn L.. 2012. The Effect of Dissolved Humic Acids on Aluminosilicate Formation and Associated Carbon Sequestration. Applied and Environmental Soil Science،Vol. 2012, no. 2012, pp.1-12.
https://search.emarefa.net/detail/BIM-471655
Modern Language Association (MLA)
Rouff, Ashaki A.…[et al.]. The Effect of Dissolved Humic Acids on Aluminosilicate Formation and Associated Carbon Sequestration. Applied and Environmental Soil Science No. 2012 (2012), pp.1-12.
https://search.emarefa.net/detail/BIM-471655
American Medical Association (AMA)
Rouff, Ashaki A.& Phillips, Brian L.& Cochiara, Stacey G.& Nagy, Kathryn L.. The Effect of Dissolved Humic Acids on Aluminosilicate Formation and Associated Carbon Sequestration. Applied and Environmental Soil Science. 2012. Vol. 2012, no. 2012, pp.1-12.
https://search.emarefa.net/detail/BIM-471655
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-471655