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Descripción
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| Pressure to use dispersive soils has increased worldwide, soil conservation against erosion is crucial and water contamination by eroded materials is a relevant problem. Then, research on organic and inorganic conditioners for reducing soils¿ particles dispersion, improving soils? properties as structure and permeability, and reducing water sources contamination is necessary. Effects of a Cardon Dato (Stenocereus griseus (Haw.) F. Buxb) mucilage (CD), FeCl3.6H2O and AlCl3.6H2O, on flocculating suspensions and arrangement of suspended particles from a Spain kaolin were studied. Suspensions were treated with the following solutions: 50 mg L-1 CD; 30 mg L-1 CD; 10 mg L-1 CD; 3 cmol+ kg-1 Fe+3 ; 3 cmol+ kg-1 Al+3; 1.5 cmol+ kg-1 Fe+3 + 1.5 cmol+ kg-1 Al+3; 50 mg L-1 CD + 1.5 cmol+ kg-1 Fe+3; 50 mg L-1 CD + 1.5 cmol+ kg-1 Al+3; 50 mg L-1 CD + 1.5 cmol+ kg-1 Fe+3 + 1.5 cmol+ kg-1 Al+3; 5 mg L-1 CD + 1.5 cmol+ kg-1 Fe+3 + 1.5 cmol+ kg-1 Al+3; distilled water; 10 mg L-1 of PAM. Concentration of particles in suspension (CPS), an index of solutions turbidity and volume of flocculated particles (VFP), an index of particles¿ array were determined. CD and the kaolin were characterized. Composition of CD was: ramnose, arabinose, galactose, galactopiranose, uronic acids, carboxylic, aldoxes and alcoholic groups. Composition of kaolin was: 55% clay and 45% silt and kaolinite its main mineral. 50 mg L-1 CD produced the lowest CPS among all treatments and the higher VFP among solo CD treatments, with minimum effects on solutions¿ pH and electric conductivity. VFP of CD treatments resulted larger than VFP of mineral treatments, effect that could be explained by mucilage¿s solutions higher swelling capacity which results in a more open,card-house type structure of the particles that CD bonds together. | |
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Internacional
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Si |
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Nombre congreso
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EUROSOIL |
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Tipo de participación
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960 |
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Lugar del congreso
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Viena |
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Revisores
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Si |
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ISBN o ISSN
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978-3-902382-05-4 |
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DOI
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Fecha inicio congreso
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25/08/2008 |
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Fecha fin congreso
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29/08/2008 |
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Desde la página
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342 |
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Hasta la página
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342 |
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Título de las actas
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EUROSOIL 2008 |