Publications by authors named "Marcio Osvaldo Lima Magalhaes"
Article Synopsis
- The petroleum industry produces various wastes that are often disposed of near well locations, leading to soil and water contamination.
- This study aimed to assess barium's solubility and its distribution in a contaminated site in Mato Rico, PR, by collecting soil samples at various depths.
- Findings revealed that while the top 0-30 cm had the largest contaminated area, the highest barium concentrations were actually found between 60-90 cm, with most barium being in a non-labile, low solubility form, indicating a low environmental risk.
Few studies have focused on the release of toxic elements from oil well drill cuttings and their effect on soil. The present study evaluated these effects using rice growth as the endpoint. Drill cuttings were collected from a Brazilian well and added in doses of 300, 3,000 and 6,000 mg kg(-1) soil, which was maintained at oxidized or reduced conditions.
View Article and Find Full Text PDFTwo assays were designed to obtain information about the influence of redox potential variations on barium mobility and bioavailability in soil. One assay was undertaken in leaching columns, and the other was conducted in pots cultivated with rice (Oryza sativa) using soil samples collected from the surface of Gleysol in both assays. Three doses of barium (100,300 mg kg(-1) and 3000 mg kg(-1)-soil dry weight) and two redox potential values (oxidizing and reducing) were evaluated.
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