Vadose zone is an important channel for sulfonamide contamination into groundwater, and the processes of adsorption and migration in the vadose zone are complicated. In this study, we focused on three sulfonamide antibiotics (sulfamethoxazole, sulfamethazine and sulfamethoxypyridazine) in the groundwater of Limin drinking water resource in northeastern China and assessed their migration potential in aquifers. Analysis was based on adsorption batch tests, a column experiment. Some key influencing factors including pH, iron, manganese and ammonia were considered. The results showed that the concentration of sulfamethoxypyridazine in groundwater is higher, ranging between 7 and 30 ng/L, the concentrations of sulfamethoxazole and sulfamethazine are relatively lower and no more than 1 ng/L. The adsorption capacity of the three antibiotics on vadose zone materials shows the following order: sulfamethoxypyridazine > sulfamethazine > sulfamethoxazole. Furthermore, for the three sulfonamides, the adsorption is higher in the medium of 0–20 cm (finer particle size, higher clay content and lower sand content) than that in 80–100 cm. Coexisting ions (iron, manganese and ammonia) promote the adsorption of sulfonamides, and the adsorption of sulfonamides decreases as the water pH increases. The column experiment also shows that the three sulfonamides have strong migration abilities and pose a considerable risk to groundwater.

渗流带是磺胺污染地下水的重要通道，渗流带的吸附和迁移过程复杂。在这项研究中，我们重点研究了东北东北利民饮用水源地地下水中的三种磺胺类抗生素（磺胺甲恶唑，磺胺二甲嘧啶和磺胺甲氧基哒嗪），并评估了它们在含水层中的迁移潜力。分析基于吸附分批测试，柱实验。考虑了一些关键的影响因素，包括pH，铁，锰和氨。结果表明，地下水中磺胺甲氧基哒嗪的浓度较高，在7〜30 ng / L之间，磺胺甲恶唑和磺胺二甲基嘧啶的浓度相对较低，不超过1 ng / L。三种抗生素在渗流区材料上的吸附能力显示以下顺序：磺胺甲氧基哒嗪>磺胺二甲嘧啶>磺胺甲恶唑。此外，对于三种磺酰胺，在0–20 cm的介质（更细的粒径，更高的粘土含量和更低的砂含量）中的吸附比在80–100 cm的介质中更高。共存离子（铁，锰和氨）促进磺酰胺的吸附，并且磺胺的吸附随着水pH值的增加而降低。柱实验还表明，三种磺酰胺类均具有很强的迁移能力，并对地下水构成相当大的风险。比80–100厘米的粘土含量高，沙含量低）。共存离子（铁，锰和氨）促进磺酰胺的吸附，并且磺胺的吸附随着水pH值的增加而降低。柱实验还表明，三种磺酰胺类均具有很强的迁移能力，并对地下水构成相当大的风险。比80–100厘米的粘土含量高，沙含量低）。共存的离子（铁，锰和氨）促进磺酰胺的吸附，并且磺胺的吸附随着水pH值的增加而降低。柱实验还表明，三种磺酰胺类均具有很强的迁移能力，并对地下水构成相当大的风险。