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

• Main Authors: Marcio Osvaldo Lima Magalhães, Nelson Moura Brasil do Amaral Sobrinho, Everaldo Zonta, Leilane da Silva Lima, Filipe Soares Diniz de Paiva
• Format: Article
• Language: English
• Published: Sociedade Brasileira de Química 2011-09-01
• Series: Química Nova
• Subjects: soil contamination; redox potential; Ba
• Online Access: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422011000900012&lng=en&tlng=en

In order to evaluate possible solubility of BaSO4 in soils under reducing conditions, column leaching assay was settled down, where the soil received three doses of BaSO4 (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.