In Situ Generated Colloid Transport of Cu and Zn in Reclaimed Mine Soil Profiles Associated with Biosolids Application

Table 4

Colloid bound metals extracted by ammonium acetate (NH₄⁺) and 1 M acid in mg L⁻¹ in selected samples, with letters representing differences at 0.01 between the extraction methods.

	Cu	Zn
	mg L^−1
NH4^+	0.003 b	0.261 a
HCl/HNO3	0.017 a	0.266 a
% Exchangeable	17.6	98.1