Margon A.,Arc Agricultural Research Council |
Sinicco T.,Arc Agricultural Research Council |
Mondini C.,Arc Agricultural Research Council |
Leita L.,Arc Agricultural Research Council
Fresenius Environmental Bulletin | Year: 2011
In this study we provided information about the fate of hexavalent chromium (Cr(VI)) in soil and the effect exerted by Cr(VI) towards native soil microbial biomass. Our results indicate that soil attenuates the occurrence of Cr(VI) at a relatively fast rate - Cr(VI) reduction was almost complete in about two weeks. Microbial biomass size (microbial biomass carbon, MBC) and activity (as CO 2-C evolution and enzymatic activities) were both affected by the presence of Cr(VI) in soil and did not fully recover concurrently with hexavalent chromium's complete disappearance. The addition of Cr(VI) to soil significantly reduced the arylsulphatase activity, which remained significantly impaired throughout the duration of the experiment and did not recover to initial values indicating its putative susceptibility towards the presence of Cr(III), too. βglucosidase activity, on the other hand, was much less affected by presence of Cr(VI) in soil and the adverse effect of chromium did not persist over time. In conclusion, our findings suggest that Cr(VI) pollution has a prolonged negative effect on soil microbial pool that persists even after its disappearance. © by PSP.