TY - JOUR
T1 - Influence of catclaw Mimosa monancistra on the dissipation of soil PAHs
AU - Álvarez-Bernal, D.
AU - Contreras-Ramos, S.
AU - Marsch, R.
AU - Dendooven, L.
N1 - Funding Information:
The authors thank M. Luna-Guido, J. González-Castañeda and J.M. Ceballos for technical assistance. This research was funded by the Department of Biotechnology and Bioengineering, Cinvestav. R. Marsch, S. Contreras-Ramos, and D. Álvarez-Bernal received grant-aided support from Consejo Nacional de Ciencia y Tecnología (CONACyT), México.
PY - 2007/3
Y1 - 2007/3
N2 - Phytoremediation is a cost-effective biotechnology for decontamination of polycyclic aromatic hydrocarbons (PAHs)-polluted soils. A greenhouse experiment was conducted to determine the growth of Mimosa monancistra, a N2-fixing leguminous plants, and its capacity to remove phenanthrene, anthracene, and benzo(a)pyrene (BaP) from soil. The PAHs decreased shoot and root dry biomass of M. monancistra 2.7- and 3.9-fold, respectively, compared to uncontaminated soil and inhibited nodule formation. The removal of phenanthrene and anthracene was similar in vegetated and unvegetated soil, but the dissipation of BaP was significantly faster in vegetated soil as compared to unvegetated soil after 14, 56, 70, and 90 d. After 90 d, dissipation of BaP was 96% in vegetated soil and 87% in unvegetated soil. Nitrification and ammonification were not affected by the addition of PAHs as concentrations of NH4+, NO2-, and NO3- were similar in contaminated and uncontaminated vegetated soil. Growth of M. monancistra was inhibited by contamination with hydrocarbons, but removal of BaP was accelerated in the rhizosphere.
AB - Phytoremediation is a cost-effective biotechnology for decontamination of polycyclic aromatic hydrocarbons (PAHs)-polluted soils. A greenhouse experiment was conducted to determine the growth of Mimosa monancistra, a N2-fixing leguminous plants, and its capacity to remove phenanthrene, anthracene, and benzo(a)pyrene (BaP) from soil. The PAHs decreased shoot and root dry biomass of M. monancistra 2.7- and 3.9-fold, respectively, compared to uncontaminated soil and inhibited nodule formation. The removal of phenanthrene and anthracene was similar in vegetated and unvegetated soil, but the dissipation of BaP was significantly faster in vegetated soil as compared to unvegetated soil after 14, 56, 70, and 90 d. After 90 d, dissipation of BaP was 96% in vegetated soil and 87% in unvegetated soil. Nitrification and ammonification were not affected by the addition of PAHs as concentrations of NH4+, NO2-, and NO3- were similar in contaminated and uncontaminated vegetated soil. Growth of M. monancistra was inhibited by contamination with hydrocarbons, but removal of BaP was accelerated in the rhizosphere.
KW - Nitrogen mineralization
KW - Phytoremediation
KW - Plant development
KW - Polycyclic aromatic hydrocarbons (PAHs)
UR - http://www.scopus.com/inward/record.url?scp=34247352106&partnerID=8YFLogxK
U2 - 10.1080/15226510701232690
DO - 10.1080/15226510701232690
M3 - Artículo
C2 - 18246717
SN - 1522-6514
VL - 9
SP - 79
EP - 90
JO - International Journal of Phytoremediation
JF - International Journal of Phytoremediation
IS - 2
ER -