The literature on this topic actually is quite abundant, even when aspen is used as active species. Some references can be found in particular in:

O. Peter Abioye (2011). Biological Remediation of Hydrocarbon and Heavy Metals Contaminated Soil, Soil Contamination, MSc Simone Pascucci (Ed.), ISBN: 978-953-307-647-8, InTech, Available from:

http://www.intechopen.com/books/soil-contamination/biological-remediation-of-hydrocarbon-and-heavymetals-contaminated-soil

Dear Vadim,

Thank you for response.  

Thanks