Effects of Long Term Hg Contamination on Soil Mercury Speciation and Soil Biological ActivitiesA. Piani, A. Acquavita, L. Catalano, M. Contin, G. Mattassi and M. De NobiliE3S Web of Conferences, 1 (2013) 08001DOI: https://doi.org/10.1051/e3sconf/20130108001