Influence of the addition of organic wastes on the metal contents of a soil
Conference contribution
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Abstract
A 3-step sequential extraction scheme for soil metals was used to detect possible changes in the composition of metal species caused by several composted residues added to soils: urban solid residues (USR), waste from paper industry (WPI), and residues of olive oil industry (OI). In the first two fractions of the extraction process (soluble in weakly acid solutions and reducible) changes by USR and/or WPI can be observed, while the oxidisable fraction is much less affected. The data suggest a definite mobilisation of Zn by USR, but in general the increase is caused by the contribution of the metals originally present in the composts. OI is the least effective in altering metal species.
Keywords
Acid Solution Metal Content Extraction Process Sequential Extraction Weakly Acid
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© Springer-Verlag Berlin Heidelberg 1999