%0 Journal Article 
%A Díaz Sanz, Jesús
%T Bioremediation of urban soils polluted with non-conventional petroleum in the Canadian context
%D 2015
%U http://hdl.handle.net/10017/25998
%X 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.


%K Urban soils
%K Non-conventional crude petroleum
%K Bioremediation
%K Natural attenuation
%K Biostimulation
%K Suelos urbanos
%K Petróleo crudo no convencional
%K Biorremediación
%K Atenuación natural
%K Bioestimulación
%K Sols urbains
%K Pétrole brut non conventionnel
%K Bioremédiation
%K Atténuation naturelle
%K Biostimulation
%K Medio Ambiente
%K Environmental science
%~ Biblioteca Universidad de Alcala