Table 3.

Aqueous concentrations of metals (μg/l)) after initial leaching tests.

Material	Cd	Cr	Cu	Ni	Pb	Zn
LTU-TOP	<0.05	1.63	4.64	1.07	1.34	3.76
Hekla	<0.05	<0.5	10.01*	2.44	1.93	15.6*
Hekla-B	<0.05	<0.5	7.68*	1.985	1.34	13.1*
DWA	<0.05	<0.5	<1	<0.5	<0.2	<2
DWA-chalk	<0.05	<0.5	<1	<0.5	<0.2	<1
Hasselfors	<0.05	<0.5	4.4	<0.5	0.45	3.19
NC-USA	<0.05	<0.5	1.72	<0.5	0.88	<2
KB-OHIO	<0.05	<0.5	3.27	2.17	<0.1	<2
BN-OHIO	<0.05	<0.5	6.16	4	<0.2	<2
Orbicon	<0.05	<0.5	3.37	0.56	0.24	<2
Control	<0.05	<0.5	1.82	<0.5	<0.2	2.31

Values with < below detection limit. *significantly higher than control (one-way ANOVA with Tukeys comparison).