Effect of the bentonite application on the cadmium mobility in an Argisol
Aiming to evaluate the effect of doses of bentonite (0, 30 and 60 t ha-1) in the mobility of cadmium on an Argisol, tests of mobility in soil columns with different cadmium concentrations (50, 250 and 450 mg kg-1 of soil) and steady state flux, were conducted, determining its flux density and percolation velocity. The cadmium was dislocated by pulse, the solution containing the cadmium initially infiltrated into the soil for a given time period and afterwards the soil was lixiviated with distilled water. Leachates were collected every 10 minutes during 80 minutes of water percolation. The solutions percolated, expressed in pore volumes, were 6.33, 2.28 and 1.93 for the 0, 30 and 60 t ha-1 of bentonite, respectively, being one pore volume equal to 1.22 cm³. The concentration of cadmium was measured by atomic absorption spectrophotometry. At the end of the experiment, the columns were dismounted and the concentrations of cadmium in the soil at different depths (0-10, 10-20, 20-30 e 30-40 cm) were also determined. The results showed that the flux density and velocity of water percolation of the water solution were significantly reduced by the addition of bentonite to the soil. The levels of cadmium in the soil did not affect these mobility parameters. Increasing doses of bentonite favored the adsorption of cadmium in the soil.
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Instituto de Pesquisas Ambientais em Bacias Hidrográficas
2012
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oai:scielo:S1980-993X20120002000032014-09-16Effect of the bentonite application on the cadmium mobility in an ArgisolTito,Gilvanise AlvesChaves,Lúcia Helena GarófaloGuerra,Hugo Orlando Carvallo heavy metal miscible displacement clay mineral Aiming to evaluate the effect of doses of bentonite (0, 30 and 60 t ha-1) in the mobility of cadmium on an Argisol, tests of mobility in soil columns with different cadmium concentrations (50, 250 and 450 mg kg-1 of soil) and steady state flux, were conducted, determining its flux density and percolation velocity. The cadmium was dislocated by pulse, the solution containing the cadmium initially infiltrated into the soil for a given time period and afterwards the soil was lixiviated with distilled water. Leachates were collected every 10 minutes during 80 minutes of water percolation. The solutions percolated, expressed in pore volumes, were 6.33, 2.28 and 1.93 for the 0, 30 and 60 t ha-1 of bentonite, respectively, being one pore volume equal to 1.22 cm³. The concentration of cadmium was measured by atomic absorption spectrophotometry. At the end of the experiment, the columns were dismounted and the concentrations of cadmium in the soil at different depths (0-10, 10-20, 20-30 e 30-40 cm) were also determined. The results showed that the flux density and velocity of water percolation of the water solution were significantly reduced by the addition of bentonite to the soil. The levels of cadmium in the soil did not affect these mobility parameters. Increasing doses of bentonite favored the adsorption of cadmium in the soil.info:eu-repo/semantics/openAccessInstituto de Pesquisas Ambientais em Bacias HidrográficasRevista Ambiente & Água v.7 n.2 20122012-06-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1980-993X2012000200003en10.4136/ambi-agua.901 |
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Tito,Gilvanise Alves Chaves,Lúcia Helena Garófalo Guerra,Hugo Orlando Carvallo |
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Tito,Gilvanise Alves Chaves,Lúcia Helena Garófalo Guerra,Hugo Orlando Carvallo Effect of the bentonite application on the cadmium mobility in an Argisol |
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Tito,Gilvanise Alves Chaves,Lúcia Helena Garófalo Guerra,Hugo Orlando Carvallo |
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Tito,Gilvanise Alves |
title |
Effect of the bentonite application on the cadmium mobility in an Argisol |
title_short |
Effect of the bentonite application on the cadmium mobility in an Argisol |
title_full |
Effect of the bentonite application on the cadmium mobility in an Argisol |
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Effect of the bentonite application on the cadmium mobility in an Argisol |
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Effect of the bentonite application on the cadmium mobility in an Argisol |
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effect of the bentonite application on the cadmium mobility in an argisol |
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Aiming to evaluate the effect of doses of bentonite (0, 30 and 60 t ha-1) in the mobility of cadmium on an Argisol, tests of mobility in soil columns with different cadmium concentrations (50, 250 and 450 mg kg-1 of soil) and steady state flux, were conducted, determining its flux density and percolation velocity. The cadmium was dislocated by pulse, the solution containing the cadmium initially infiltrated into the soil for a given time period and afterwards the soil was lixiviated with distilled water. Leachates were collected every 10 minutes during 80 minutes of water percolation. The solutions percolated, expressed in pore volumes, were 6.33, 2.28 and 1.93 for the 0, 30 and 60 t ha-1 of bentonite, respectively, being one pore volume equal to 1.22 cm³. The concentration of cadmium was measured by atomic absorption spectrophotometry. At the end of the experiment, the columns were dismounted and the concentrations of cadmium in the soil at different depths (0-10, 10-20, 20-30 e 30-40 cm) were also determined. The results showed that the flux density and velocity of water percolation of the water solution were significantly reduced by the addition of bentonite to the soil. The levels of cadmium in the soil did not affect these mobility parameters. Increasing doses of bentonite favored the adsorption of cadmium in the soil. |
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Instituto de Pesquisas Ambientais em Bacias Hidrográficas |
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2012 |
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AT titogilvanisealves effectofthebentoniteapplicationonthecadmiummobilityinanargisol AT chavesluciahelenagarofalo effectofthebentoniteapplicationonthecadmiummobilityinanargisol AT guerrahugoorlandocarvallo effectofthebentoniteapplicationonthecadmiummobilityinanargisol |
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