. 2011 Dec;41(4):303–315. doi: 10.1016/j.limno.2011.01.002

Table 1.

Major chemical constituents in the acid mining lake and the neutralized pit lake at 3 different depths (means of three measurements, if not stated otherwise; SO₄ in g L⁻¹, all other in mg L⁻¹).

	Acid mining lake			Neutralized lake
Depth	0–3 m	5 m	7–8 m	0–3 m	4–6 m	12–13 m
Fe	81 ± 30	95 ± 30^b	382 ± 133	0.63 ± 0.51	1.09 ± 0.38	1673 ± 547
SO₄	1.29 ± 0.27	1.64 ± 0.01^b	1.44 ± 087	0.45 ± 0.42	0.69 ± 0.44	3.33 ± 1.13
Mg	64^a	n.d.	133^a	29^a	46^a	57^a
Ca	198^a	n.d.	341^a	25^a	187^a	362^a
NO₃	0.46 ± 0.19	0.47 ± 0.22	0.53 ± 0.31	0.94 ± 0.57	4.02 ± 3.85	0.72 ± 0.30
NH₄	3.14 ± 0.09^c	3.18 ± 0.13^c	5.46 ± 0.16^c	0.54 ± 0.21^c	0.50 ± 0.17^c	2.58 ± 0.39^c
Mn	7.7 ± 1.8	8.3 ± 2.2^b	8.9 ± 1.0	1.6 ± 0.6	2.3 ± 0.9	6.6 ± 1.4
Al	14.4 ± 4.3	16.4 ± 3.4^b	5.3 ± 7.9	<0.03	0.15 ± 0.21	0.07 ± 0.01
Cu	0.04 ± 0.04	0.06 ± 0.06^b	<0.02	<0.02	<0.01	<0.02
Zn	0.49 ± 0.15	0.55 ± 0.15^b	0.23 ± 0.29	0.03 ± 0.02	0.05 ± 0.02	0.06 ± 0.02
Sr	0.863^a	n.d.	1.387^a	0.374^a	0. 498^a	3.506^a
Cd	<0.001	<0.003^b	<0.001	<0.002	<0.001	<0.001
Hg	<0.0002	<0.0002^b	<0.0002	<0.0002	<0.0002	<0.0002

Single measurement on September 10, 2009.

Measured on October 25, 2005 and April 1, 2008.

Measured on September 29 and October 25, 2005.