Table 2. Concentration of anions remaining in solution, expressed as mg L−1 and % of the initial concentration, following demineralization treatments.
Treatment | Chloride | Phosphate | Sulfate | Acetic acid | ||||
---|---|---|---|---|---|---|---|---|
mg L−1 | % | mg L−1 | % | mg L−1 | % | mg L−1 | % | |
DPM (no treatment)a | 659 | 100 | 1411 | 100 | 129 | 100 | 100 | 100 |
Amberlite MB20b | 96 | 14.5 | 284 | 20.1 | 3 | 2.3 | 86 | 86 |
Combined treatmentc | 63 | 9.5 | 0 | 0 | 0 | 0 | 91 | 91 |
Original DPM medium.
Treatment with the IEX resin Amberlite MB20 alone at pH 2.5.
Combined treatment: calcium-precipitation, acidification with Amberlite IR-120 and Amberlite MB20.