AI 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.
Article Abstract
The petroleum industry generates a range of wastes which is often are disposed in soil close to the well location, negatively affecting soil and water quality. The objective of this study was to evaluate the solubility and map the spatial variability of barium in a potentially contaminated area. The study area consisted of a petroleum well-drilling waste disposal site located in the municipality of Mato Rico-PR. A large georeferenced sampling grid was organized. Soil samples were collected at depths of 30, 60, 90, and 120 cm for determination of the "pseudo-total" concentrations and geochemical fractionation of barium. The barium concentrations showed spatial dependence, which permitted the use of geostatistical interpolators. Regarding depth, the depth of 0-30 cm showed the largest contaminated area; however, higher concentrations of barium were found at the depth of 60-90 cm. The results of geochemical fractionation showed that the analyzed samples contained percentages higher than 99% in the non-labile fraction (residual). These results indicate clearly that the barium was in a condition of low solubility, even for samples that had the highest concentrations, presenting low-environmental risk.
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| http://dx.doi.org/10.1007/s10661-018-6566-x | DOI Listing |
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