Figure 3From: Assessing antibiotic sorption in soil: a literature review and new case studies on sulfonamides and macrolidesDistribution of sulfamethazine species by pH. Sulfamethazine is predominantly cationic below pH 1.62, neutral between pH 1.62 – 7.91, and anionic above pH 7.91. The chemical structures that represent the highest fraction of species is shown above the curve.Back to article page