Effect of the restoration of a fluvisol contaminated with crude oil
Soils adjacent to oil facilities in Mexico have risk of being affected by leaks or spills of crude oil or its derivatives. Although the environmental legal framework established through the official Mexican standards, the maximum permissible levels of hydrocarbons in soil and guidelines for remediat...
| Autores: | , , , , , |
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| Tipo de recurso: | artículo |
| Estado: | Versión publicada |
| Fecha de publicación: | 2012 |
| País: | México |
| Institución: | UNIVERSIDAD NACIONAL AUTÓNOMA DE MÉXICO |
| Repositorio: | Revista Internacional de Contaminación Ambiental |
| Idioma: | español |
| OAI Identifier: | oai:ojs.pkp.sfu.ca:article/25347 |
| Acceso en línea: | https://www.revistascca.unam.mx/rica/index.php/rica/article/view/25347 |
| Access Level: | acceso abierto |
| Palabra clave: | basic infiltration bulk density soil compaction texture water retention compactación densidad aparente humedad infiltración básica retención de agua textura |
| Sumario: | Soils adjacent to oil facilities in Mexico have risk of being affected by leaks or spills of crude oil or its derivatives. Although the environmental legal framework established through the official Mexican standards, the maximum permissible levels of hydrocarbons in soil and guidelines for remediation, geochemical parameters used do not guarantee the recovery of the original soil conditions. The operation and resilience of altered properties of oil-contaminated soil and restored, require the measurement of the efficiency of commercial restoration using parameters that are not included in the NOM-138-SEMARNAT/SA1-2008. Therefore, the objective of this study was to identify the physical and chemical properties of the soil restored to demonstrate the recovery quality of the soil compared to the values corresponding to adjacent soil like taxonomically. We determined the amount of total petroleum hydrocarbons (TPH), eight physical and 10 chemical properties of a Fluvisol restored in an area of 0,85 ha and compared with values of samples collected in 0,377 ha of control adjacent Fluvisol. Samples were collected at two depths (0-15 and 15-30 cm). We identified significant differences (p <0,01) between both sites for TPH, penetration resistance, bulk density, moisture at field capacity, water retention, basic infiltration, clay and silt, also in potential of hydrogen, electrical conductivity, organic matter, total nitrogen, available phosphorus, exchangeable potassium, exchangeable calcium, exchangeable magnesium, exchangeable sodium, and cationic exchange capacity. Negative correlation was identified (p <0,01) between TPH with 10 physical and chemical variables highlighting basic infiltration (-0,926) and moisture at field capacity (-0,914), which demonstrates that the soil remains concerned restored. The correlation was positive and significant (p <0.01) between TPH with six physical and chemical variables excelling bulk density (0,935) and penetration resistance (0,928), which shows the origin of land degradation. The data show that soil quality continues modified, so that the chemical and physical restoration was not effective, and requires new restoration processes, preferably biological nature. This study provides information for the selection of physical and chemical indicators of soil to allow better monitoring of its restoration process, to consider restored. |
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