Research Article
Sorption of Sulfonamide Antibiotics to Soil Organic Sorbents: Batch Experiments with Model Compounds and Computational Chemistry
Table 3
Speciation data for the sulfonamides SAA, SPY, and SDT at the examined pH values (data calculated using
values from [
18]).
| | pH | Cation | Neutral | Anion | Zwitterion |
| SAA | 4.5 | 21.59 | 78.40 | 0 | 0.01 | 6.0 | 0.86 | 99.10 | 0 | 0.01 | 7.5 | 0.02 | 99.90 | 0.07 | 0.01 | SPY | 4.5 | 62.40 | 37.51 | 0.01 | 0.08 | 6.0 | 4.96 | 94.56 | 0.40 | 0.08 | 7.5 | 0.10 | 88.65 | 11.18 | 0.07 | SDT | 4.5 | 29.42 | 70.23 | 0.16 | 0.19 | 6.0 | 1.13 | 93.70 | 4.99 | 0.18 | 7.5 | 0.03 | 37.50 | 62.40 | 0.07 |
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