Table 2.
Initial Condition Summary for Batch Kinetic (KE) and Isotherm (IE) Experimentsa
| design initial concentrations |
measured pH |
||||||
|---|---|---|---|---|---|---|---|
| experiment | anion(s) | length (days) | chloride (mM) | anion(s) | initial | final | design resin mass (g) |
| KE-N | nitrate | 7 | 5.0 | 8 mg N/L | 6.6–6.9 | 5.2–6.7 | 1.1 |
| KE-S | sulfate | 7 | 2.0 | 27 mg SO42−/L | 6.6–7.0 | 5.3–6.7 | 1.0 |
| KE-B | bicarbonate | 7 | 1.0 | 16 mg C/L | 6.1–8.3 | 4.8–7.6 | 1.0 |
| IE-N | nitrate | 3 | 5.0 | 5–15 mg N/L | 6.6–6.9 | 4.8–6.9 | 0.22–2.0 |
| IE-S-1 | sulfate | 4 | 2.0 | 27–54 mg SO42−/L | 5.9–7.5 | 3.7–7.8 | 0.35–2.0 |
| IE-S-2 | sulfate | 4 | 5.0 | 27–54 mg SO42−/L | 6.3–7.3 | 3.7–7.3 | 0.5–5.0 |
| IE-S-3 | sulfate | 7 | 2.0 | 175–275 mg SO42−/L | 6.3–6.7 | 3.3–4.4 | 0.5–2.8 |
| IE-B | bicarbonate | 5 | 1.0 | 1.9–39.1 mg C/L | 5.9–8.4 | 5.7–7.7 | 2.0 |
| bicarbonate | 45 mg C/L | ||||||
| IE-ALL | nitrate | ≥7 | 2.0 or 5.0 | 6 mg N/L | 6.7–8.4 | 2.6–8.4 | 1.0–4.0 |
| sulfate | 150 mg SO42−/L | ||||||
a
All experiments were conducted at 25 °C in a controlled temperature chamber where bottles were rotated at 30 rpm.