3.1.3. Other mineral element and trace metal changes
Concentrations of the other selected mineral elements and
trace metals within the soils are summarized in Table 2. The sludge
layers (Sl) with the 30S and 60S treatments exhibited higher TM
concentrations compared to the underlying horizons. Cu, Zn and
Cd concentrations in the Ts layer increased significantly due to the
SS application. For the same horizon, the mineral element (K, Mg
and Mn) and Pb concentrations exhibited no significant differences
among the 0S, 30S and 60S treatments.