TY - JOUR
T1 - Bioremediation of polycyclic aromatic hydrocarbon-contaminated saline-alkaline soils of the former Lake Texcoco
AU - Betancur-Galvis, L. A.
AU - Alvarez-Bernal, D.
AU - Ramos-Valdivia, A. C.
AU - Dendooven, L.
N1 - Funding Information:
We thank Comisión Nacional de Agua for access to the former lake Texcoco and Marco Luna-Guido for technical assistance. L.A. B.-G. received grant-aided support from Secretaría de Relaciones Exteriores del Gobierno de México (SRE) and the Universidad de Antioquia (UdeA), Medellín, Colombia and D. A.-B. from Consejo Nacional de Ciencia y Tecnología (CONACyT, México). The research was funded by CONACyT project 39801-Z.
PY - 2006/3
Y1 - 2006/3
N2 - Polycyclic aromatic hydrocarbons (PAHs) such as phenanthrene, anthracene and Benzo[a]pyrene (BaP) are toxic for the environment. Removing these components from soil is difficult as they are resistant to degradation and more so in soils with high pH and large salt concentrations as in soil of the former lake Texcoco, but stimulating soil micro-organisms growth by adding nutrients might accelerate soil restoration. Soil of Texcoco and an agricultural Acolman soil, which served as a control, were spiked with phenanthrene, anthracene and BaP, added with or without biosolid or inorganic fertilizer (N, P), and dynamics of PAHs, N and P were monitored in a 112-day incubation. Concentrations of phenanthrene did not change significantly in sterilized Acolman soil, but decreased 2-times in unsterilized soil and >25-times in soil amended with biosolid and NP. The concentration of phenanthrene in unsterilized soil of Texcoco was 1.3-times lower compared to the sterilized soil, 1.7-times in soil amended with NP and 2.9-times in soil amended with biosolid. In unsterilized Acolman soil, degradation of BaP was faster in soil amended with biosolid than in unamended soil and soil amended with NP. In unsterilized soil of Texcoco, degradation of BaP was similar in soil amended with biosolid and NP but faster than in the unamended soil. It was found that application of biosolid and NP increased degradation of phenanthrene, anthracene and BaP, but to a different degree in alkaline-saline soil of Texcoco compared to an agricultural Acolman soil.
AB - Polycyclic aromatic hydrocarbons (PAHs) such as phenanthrene, anthracene and Benzo[a]pyrene (BaP) are toxic for the environment. Removing these components from soil is difficult as they are resistant to degradation and more so in soils with high pH and large salt concentrations as in soil of the former lake Texcoco, but stimulating soil micro-organisms growth by adding nutrients might accelerate soil restoration. Soil of Texcoco and an agricultural Acolman soil, which served as a control, were spiked with phenanthrene, anthracene and BaP, added with or without biosolid or inorganic fertilizer (N, P), and dynamics of PAHs, N and P were monitored in a 112-day incubation. Concentrations of phenanthrene did not change significantly in sterilized Acolman soil, but decreased 2-times in unsterilized soil and >25-times in soil amended with biosolid and NP. The concentration of phenanthrene in unsterilized soil of Texcoco was 1.3-times lower compared to the sterilized soil, 1.7-times in soil amended with NP and 2.9-times in soil amended with biosolid. In unsterilized Acolman soil, degradation of BaP was faster in soil amended with biosolid than in unamended soil and soil amended with NP. In unsterilized soil of Texcoco, degradation of BaP was similar in soil amended with biosolid and NP but faster than in the unamended soil. It was found that application of biosolid and NP increased degradation of phenanthrene, anthracene and BaP, but to a different degree in alkaline-saline soil of Texcoco compared to an agricultural Acolman soil.
KW - Agricultural soil
KW - Biosolid
KW - Dynamics
KW - Fertilizer
KW - Microcosms assays
KW - Sequestration
UR - http://www.scopus.com/inward/record.url?scp=33644849041&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2005.07.026
DO - 10.1016/j.chemosphere.2005.07.026
M3 - Artículo
C2 - 16154615
SN - 0045-6535
VL - 62
SP - 1749
EP - 1760
JO - Chemosphere
JF - Chemosphere
IS - 11
ER -