RT info:eu-repo/semantics/masterThesis
T1 Bioremediation of urban soils polluted with non-conventional petroleum in the Canadian context
A1 Díaz Sanz, Jesús
K1 Urban soils
K1 Non-conventional crude petroleum
K1 Bioremediation
K1 Natural attenuation
K1 Biostimulation
K1 Suelos urbanos
K1 Petróleo crudo no convencional
K1 Biorremediación
K1 Atenuación natural
K1 Bioestimulación
K1 Sols urbains
K1 Pétrole brut non conventionnel
K1 Bioremédiation
K1 Atténuation naturelle
K1 Biostimulation
K1 Medio Ambiente
K1 Environmental science
AB The increase of transport of non-conventional crude petroleum in Canada is associated with risks of spills. Accidental spills such as in Lac-Megantic revealed a lack of understanding of its biodegradation during soil treatment. The present work studied the feasibility of bioremediation methods in affected urban soils by non-conventional petroleum. Soil with similar composition to the affected soils in Lac-Megantic was sampled in Quebec City and presented a high content in heavy metals (3 mg Cd kg-1 soil). Natural attenuation and biostimulation were applied to representative soil samples (polluted in laboratory with Alberta´s Tar Sands Petroleum) at 20ºC and 5ºC for 31 days. Total petroleum hydrocarbons (TPH) determined the extent of degradation.Respirometric analyses and plate-counting of colony-forming units (CFU) monitored microbial activity. Results showed 20% TPH removal for both methods at 20ºC. At 5ºC biostimulation had 12% and natural attenuation 2%. For the studied experimental conditions the following strategies are recommended in restoration of soil ecosystems (1) no treatment of biostimulation at temperate temperatures and (2) amendment of N and P fertilizers to improve microorganisms degradation at temperatures < 10ºC.
YR 2015
FD 2015
LK http://hdl.handle.net/10017/25998
UL http://hdl.handle.net/10017/25998
LA eng
NO 47 p.
DS MINDS@UW
RD 19-abr-2024