| Effects of dissolved organic carbon on phosphate retention on two calcareous soils. | |
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MedLine Citation:
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PMID: 15631513 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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To evaluate the effects of dissolved organic carbon (DOC) on phosphate retention (including both sorption and/or precipitation reactions) on soils, experiments were performed by using two typical calcareous soils from southeastern Spain (Calcic Regosol and Luvic Xerosol) and two different types of DOC: (1) extracts from a commercial peat (DOC-PE) and (2) high-purity tannic acid (DOC-TA). The experiments were carried out from a 0.01 M CaCl2 aqueous medium at 25 degrees C. The results obtained show that the presence of both DOC-PE and DOC-TA, over a concentration range of 15 (DOC-15) to 100 (DOC-100) mg L(-1), produces in all cases a decreasing amount of phosphate retained in the soils studied, the decrease observed being higher when DOC-PE is used as source of DOC. The values of the decrease observed when DOC-PE was added ranged between 19.9% (DOC-15) and 15.6% (DOC-100) for the Calcic Regosol and between 17.3% (DOC-70, DOC-100) and 14.6% (DOC-15) for the Luvic Xerosol. The variation observed when DOC-TA was added ranged between 8.5% (DOC-100) and 0.5% (DOC-35) for the Calcic Regosol and between 7.0% (DOC-100) and 1.0% (DOC-15) for the Luvic Xerosol. |
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Authors:
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Manuel Fernández-Pérez; Francisco Flores-Céspedes; Emilio González-Pradas; María Delores Ureña-Amate; Matilde Villafranca-Sánchez; María Socías-Viciana; Susana Pérez-García |
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Publication Detail:
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Type: Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Journal of agricultural and food chemistry Volume: 53 ISSN: 0021-8561 ISO Abbreviation: J. Agric. Food Chem. Publication Date: 2005 Jan |
Date Detail:
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Created Date: 2005-01-05 Completed Date: 2005-03-02 Revised Date: 2008-11-21 |
Medline Journal Info:
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Nlm Unique ID: 0374755 Medline TA: J Agric Food Chem Country: United States |
Other Details:
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Languages: eng Pagination: 84-9 Citation Subset: IM |
Affiliation:
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Department of Inorganic Chemistry, University of Almería, La Cañada de San Urbano s/n, 04120 Almería, Spain. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adsorption Carbon / pharmacology* Chemistry, Physical Permeability Phosphates / analysis, chemistry* Physicochemical Phenomena Plants / metabolism Soil / analysis* Spain |
| Chemical | |
Reg. No./Substance:
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0/Phosphates; 0/Soil; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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