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Mobilidade de bário em solo tratado com sulfato de bário sob condição de oxidação e redução

2011; Brazilian Chemical Society; Volume: 34; Issue: 9 Linguagem: Inglês

10.1590/s0100-40422011000900012

1678-7064

Márcio Osvaldo Lima Magalhães, Nelson Moura Brasil do Amaral Sobrinho, Everaldo Zonta, Leilane da Silva Lima, Filipe Soares Diniz de Paiva,

Iron oxide chemistry and applications

OXIDATION AND REDUCTION. In order to evaluate possible solubility of BaSO 4 in soils under reducing conditions, column leaching assay was settled down, where the soil received three doses of BaSO 4 (100, 300 and 3000 mg kg -1 ) at two humidities.After reaching an Eh of -200 mV rainfall of 200 mm per day -1 was simulated.The condition of reduction led to the increased levels of barium in the fractions of higher lability and the highest levels of barium in the leachate extract, which were above the potability standards.Only 0.05% of barium in the column that received the highest dose was removed by leaching.