Table A1.

Permeate flow observed during the batch-mode studies with three different membranes (NF270, NFX, NFDL) and mine waters “A” (0.384 g/L as Cl⁻, 1.02 g/L as SO₄²⁻, 0.107 g/L as Na⁺, 0.142 g/L as Mg²⁺, 0.312 g/L as Ca²⁺) and “B” (33.2 g/L as Cl⁻, 0.937 g/L as SO₄²⁻, 19.5 g/L as Na⁺, 0.990 g/L as Mg²⁺, 0.771 g/L as Ca²⁺).

Recovery, %	Volume Reduction Fraction	Permeate Flux, dm3/m2·h
		“A”			“B”
		NF270	NFX	NFDL	NF270	NFX	NFDL
10%	1.11	273	62	206	76	64	67
20%	1.25	264	59	223	71	61	68
30%	1.43	255	56	211	71	58	61
40%	1.67	247	56	204	62	56	56
50%	2.00	223	56	187	55	50	53
60%	2.50	211	28	169	49	45	51
70%	3.33	185	-	154	39	41	50
80%	5.00	145	-	120	25	35	46
90%	10.0	65	-	-	76	29	42