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| Run order | Cat, ppm | Rec, mM | PR removal efficiency, % |
|---|---|---|---|
| 1 | 20 | 50 | 97 |
| 2 | 20 | 40 | 53 |
| 3 | 10 | 50 | 60 |
| 4 | 30 | 60 | 58 |
| 5 | 20 | 50 | 95 |
| 6 | 20 | 60 | 88 |
| 7 | 10 | 60 | 50 |
| 8 | 30 | 50 | 85 |
| 9 | 20 | 50 | 98 |
| 10 | 20 | 50 | 97 |
| 11 | 20 | 50 | 98 |
| 12 | 30 | 40 | 49 |
| 13 | 10 | 40 | 39 |
| 14 | 20 | 50 | 96 |
