accumulation of heavy metals from contaminated soil to plants and evaluation of soil remediation by vermiculite.we evaluated the distribution of 15 metal ions, namely al, cd, cu, cr, fe, la, mn, ni, pb, sc, ti, v, y, zn and zr, in the soil of a contaminated site in piedmont (italy). this area was found to be heavily contaminated with cu, cr and ni. the availability of these metal ions was studied using tessier's sequential extraction procedure: the fraction of mobile species, which potentially is the most harmful for the environment, was much higher than that normally present in unpolluted soils. this soi ...201121055788
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