Sustainable remediation of diesel-contaminated soil by low temperature thermal treatment: Improved energy efficiency and soil reusability.
Chemosphere
; 241: 124952, 2020 Feb.
Article
en En
| MEDLINE
| ID: mdl-31627107
ABSTRACT
Thermal treatment can effectively remediate diesel-contaminated soil, but is considered unsustainable because of its energy-intensive nature and potential to damage soil properties. Here, we used low temperature thermal treatment (LTTT) as an energy-efficient technique to remediate diesel-contaminated soil. The impacts of LTTT on the physiochemical and ecological properties of soils were investigated to evaluate the reusability of heated soil. Heating at 250⯰C for 10â¯min reduced the concentration of the total petroleum hydrocarbons from 6271â¯mg/kg to 359⯠mg/kg, which is lower than the Chinese risk screening level of 826â¯mg/kg. After LTTT, most soil physiochemical properties were nearly unchanged, and the NO3--N and NH4+-N contents increased. Moreover, LTTT-remediated soil was favorable for the germination and early growth of wheat. The microbial community changed substantially, but recovered after being mixed with uncontaminated soil. Finally, exploration of the mechanisms of LTTT revealed that pyrolysis was the dominant mechanism of diesel removal. A biochar-like pyrolytic carbon was formed, which improved the soil reusability.
Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
2_ODS3
Problema de salud:
2_enfermedades_transmissibles
/
2_quimicos_contaminacion
Asunto principal:
Contaminantes del Suelo
/
Gasolina
/
Frío
/
Contaminación Ambiental
/
Restauración y Remediación Ambiental
Aspecto:
Determinantes_sociais_saude
Idioma:
En
Revista:
Chemosphere
Año:
2020
Tipo del documento:
Article
País de afiliación:
China