Fate and Distribution of Heavy Metals in Wastewater Irrigated Calcareous Soils

Figure 3

Relative distribution of Zn, Cd, and Ni in WD1 and ZR1 soils amended or nonamended with 3% hydrous ferric oxide (HFO). Mean values followed by the same letter within a column are not different at 𝑃<0.05 by 𝑡-test. F1: soluble and exchangeable; F2: carbonate bound; F3: Fe/Mn oxide; F4: organic bound; F5: residual.

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