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- W3055181844 abstract "Soluble and total extractable concentrations used for predicting contaminants' environmental fate may lead to uncertainties due to the lack of understanding of soil-contaminants interactions. The present study focuses on the influence of a controlled electric field on the distribution of polycyclic aromatic hydrocarbons in soil samples evaluated through a speciation scheme. Soil samples were spiked with 25,000 mg (hexadecane, phenanthrene, and pyrene 100:1:1 w/w) per kg of soil, and speciation of hydrocarbons was determined by employing a novel Sequential Solvent Extraction procedure, resulting in five fractions: soluble, pseudosoluble, desorbable, extractable, and sequestered. The distribution of hydrocarbons was then changed through the application of an electric field (72 h, 0.708 mA cm−2, 2.95 ± 0.13 V cm−1), which modified the interactions in the soil-water interface. The electrochemical treatment significantly increased the pyrene soluble, desorbable and sequestered fractions by 340, 1.3 and 19-fold (p < 0.05); the hexadecane soluble fraction increased in 6-fold (p < 0.05) and the phenanthrene desorbable fraction increased in 1.3-fold (p < 0.05). The use of the speciation scheme proposed in this study provides a wider view of hydrocarbons distribution in soils, rather than using water-soluble or total extractable concentrations. Finally, this speciation scheme is proposed as a tool to evaluate the environmental fate of organic contaminants in soils." @default.
- W3055181844 created "2020-08-24" @default.
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- W3055181844 date "2021-01-01" @default.
- W3055181844 modified "2023-10-15" @default.
- W3055181844 title "Sequential solvent extraction as a tool for evaluating hydrocarbons speciation in soil after electrochemical treatment" @default.
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- W3055181844 doi "https://doi.org/10.1016/j.scitotenv.2020.141802" @default.
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