Effect of application of phosphate and organic manure-based fertilizers on arsenic transformation in soil columns |
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Authors: | Luděk Sisr Martin Mihaljevič Vojtěch Ettler Ladislav Strnad Ondřej Šebek |
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Institution: | (1) Institute of Geochemistry, Mineralogy and Mineral Resources, Faculty of Science, Charles University, Albertov 6, 128 43 Prague, Czech Republic;(2) Dekonta a.s., Volutová 2523, 158 00 Prague, Czech Republic;(3) Laboratories of Geological Institutes, Faculty of Science, Charles University, Albertov 6, 128 43 Prague, Czech Republic |
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Abstract: | The mobility of arsenic in Cambisol under the influence of added barnyard manure and application of a phosphate solution to
the soil was described on the basis of column experiments. A soil sample containing 126 mg/kg total As and 3.72 mg/kg specifically-sorbed
As was extracted using demineralized water (DIW) or a 28 μmol/l phosphate solution in a column containing untreated soil and
in a column with added barnyard fertilizer. The pH, Eh, alkalinity, main components, including DOC, and selected trace elements
(Al, Mn, Pb, Cu, Zn, Cd, Cr, Co, Ni, Ba and As) were determined in the extracts. Hydrodynamic tests of the flow and transport
of the substances in the columns were carried out. The addition of barnyard manure was manifested in elevated concentrations
of the main inorganic components, DOC and Al and a decrease in the Eh value and Mn concentration. Application of a phosphate
solution was manifested in a decrease in the NO3 and SO4 concentrations, probably as a result of the effect of increased biological fixation. The As concentration in extracts varied
from 8.8 to 15.5 μg/l and was not dependent on the composition of the extracting solution or the addition of barnyard fertilizer. |
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Keywords: | Arsenic Barnyard manure Column experiment Phosphate fertilizer Soil |
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