Table 5 Composition for the feed solutions used in this work as measured by ion chromatography: synthetic hypersaline solution (Synthetic); synthetic solution after CaCO3 precipitation by basic treatment (Synthetic BT); real mine tailing wastewater (Real); real mine tailing wastewater after basic treatment (Real BT)

From: Turning mine-tailing streams into sources of water and mineral salts in a membrane-sustained circular scenario

Specie

Synthetic [mg/L]

Synthetic BT [mg/L]

Real [mg/L]

Real BT [mg/L]

Na+

58,266

53,549

48,731

51,630

Mg2+

7653

7570

6945

4930

Ca2+

1281

<0.1

1405

271

K+

18,999

16,863

13764

17,740

Cl−

170,511

155,931

170,494

157,651

SO42-

2499

1828

3709

5870

HCO3−

137

150

93

182

TDS

259,346

235,892

245,142

238,274

pH

7.4

7.7

7.5

7.8

density

1145

1163

1208

1202

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