TY - JOUR
T1 - Eisenia fetida increased removal of polycyclic aromatic hydrocarbons from soil
AU - Contreras-Ramos, Silvia M.
AU - Álvarez-Bernal, Dioselina
AU - Dendooven, Luc
N1 - Funding Information:
We thank M. Luna-Guido and J.M. Ceballos-Ramirez for their technical assistance. The research was funded by the Department of Biotechnology and Bioengineering, Centro de Investigación y de Estudios Avanzados del IPN (Cinvestav) and Secretaría del Medio Ambiente y Recursos Naturales (SEMARNAT) project FOSEMARNAT-2004-01-219. S.M.C.-R. and D.A.-B. received grant-aided support from Consejo Nacional de Ciencia y Tecnología (CONACyT), México.
PY - 2006/6
Y1 - 2006/6
N2 - The removal of phenanthrene, anthracene and benzo(a)pyrene added at three different concentrations was investigated with or without earthworms (Eisenia fetida) within 11 weeks. Average anthracene removal by the autochthonous micro-organisms was 23%, 77% for phenanthrene and 13% for benzo(a)pyrene, while it was 51% for anthracene, 47% for benzo(a)pyrene and 100% for phenanthrene in soil with earthworms. At 50 and 100 mg phenanthrene kg-1 E. fetida survival was 91% and 83%, but at 150 mg kg-1 all died within 15 days. Survival of E. fetida in soil amended with anthracene ≤1000 mg kg-1 and benzo(a)pyrene ≤150 mg kg-1 was higher than 80% and without weight loss compared to the untreated soil. Only small amounts of PAHs were detected in the earthworms. It was concluded that E. fetida has the potential to remove large amounts of PAHs from soil, but more work is necessary to elucidate the mechanisms involved.
AB - The removal of phenanthrene, anthracene and benzo(a)pyrene added at three different concentrations was investigated with or without earthworms (Eisenia fetida) within 11 weeks. Average anthracene removal by the autochthonous micro-organisms was 23%, 77% for phenanthrene and 13% for benzo(a)pyrene, while it was 51% for anthracene, 47% for benzo(a)pyrene and 100% for phenanthrene in soil with earthworms. At 50 and 100 mg phenanthrene kg-1 E. fetida survival was 91% and 83%, but at 150 mg kg-1 all died within 15 days. Survival of E. fetida in soil amended with anthracene ≤1000 mg kg-1 and benzo(a)pyrene ≤150 mg kg-1 was higher than 80% and without weight loss compared to the untreated soil. Only small amounts of PAHs were detected in the earthworms. It was concluded that E. fetida has the potential to remove large amounts of PAHs from soil, but more work is necessary to elucidate the mechanisms involved.
KW - Autochthonous micro-organisms
KW - Eisenia fetida
KW - Polycyclic aromatic hydrocarbons
KW - Removal
KW - Toxicity and survival
UR - http://www.scopus.com/inward/record.url?scp=33645540557&partnerID=8YFLogxK
U2 - 10.1016/j.envpol.2005.08.057
DO - 10.1016/j.envpol.2005.08.057
M3 - Artículo
C2 - 16263200
SN - 0269-7491
VL - 141
SP - 396
EP - 401
JO - Environmental Pollution
JF - Environmental Pollution
IS - 3
ER -