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Química Nova

Print version ISSN 0100-4042


LIMA, Erica Souto Abreu et al. Barium absorption by rice plants (Oryza sativa L.) and mobility in soil treated with barite under different redox potential conditions. Quím. Nova [online]. 2012, vol.35, n.9, pp.1746-1751. ISSN 0100-4042.

Two parallel tests were carried out to evaluate barium solubility in soils treated with barite under reducing conditions: one in leaching columns and another with potted plants cultivated with rice. Soils were treated with three doses of barite and kept at two humidity levels. The reduction (-200 mV) condition promoted an increase in barium in the geochemical fraction of higher liability, higher concentrations of barium in the leached extracts, and higher absorption by rice plants. As a result of increased uptake and accumulation of barium, the plants showed stunted growth

Keywords : contamination; leaching; redox potential.

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