The release of pharmaceutical products, especially antibiotics, into natural waters has become one of the main environmental concerns in recent years. Amoxicillin (AMX) is widely used in the treatment of human infections and is commonly detected in domestic and industrial wastewater. This work aims to study the elimination of AMX using functional water-soluble polymers (FSP) assisted by ultrafiltration membranes through the washing and enrichment method. For this, three polymers with different charge ratios (cationic:anionic) of 2:1 (FSP-1), 1:2 (FSP-2) and 1:1 (FSP-3) were synthesized. Polymers were synthesized by radical polymerization and characterized by FTIR and ${}^1$H-NMR spectroscopy. Removal studies were carried out evaluating variables such as pH, ionic strength, concentration of FSP and AMX. Through the washing method, it was found that the conditions with the highest removal efficiency for FSP-1 was 97% at pH 11.0, molar ratio (40:1), and 100 mg L${}^{-1}$AMX, FSP-2 of 72% at pH 3.0, molar ratio (40:1), and 40 mg L${}^{-1}$ of AMX; while FSP-3 was 82% at pH 7.0, molar ratio (100:1), and 40 mg L${}^{-1}$ of AMX. Meanwhile, the maximum removal capacity obtained by the enrichment method was 705.8, 385.3, and 397.8 mg g${}^{-1}$ FSP-1, FSP-2 and FSP-3, respectively. The results suggest that FSPs coupled to ultrafiltration membranes are an alternative for the environmental remediation of antibiotic-type contaminants such as AMX.

近年来，将药物特别是抗生素释放到天然水中已成为主要的环境问题之一。阿莫西林（AMX）被广泛用于人类感染的治疗，通常在生活和工业废水中被检测到。这项工作旨在研究使用功能性水溶性聚合物（FSP）通过洗涤和富集方法辅助超滤膜来消除AMX。为此，合成了具有不同的电荷比（阳离子：阴离子）为2：1（FSP-1），1：2（FSP-2）和1：1（FSP-3）的三种聚合物。通过自由基聚合合成聚合物，并通过FTIR和${}^{\mathrm{1个}}$1 H-NMR光谱。进行了去除研究，以评估变量，例如pH，离子强度，FSP和AMX的浓度。通过洗涤方法，发现在pH 11.0，摩尔比（40：1）和100 mg L的条件下，FSP-1去除效率最高的条件为97％。${}^{-\mathrm{1个}}$AMX，FSP-2在pH 3.0下为72％，摩尔比（40：1）和40 mg L${}^{-\mathrm{1个}}$的AMX；而FSP-3在pH 7.0，摩尔比（100：1）和40 mg L的条件下为82％${}^{-\mathrm{1个}}$AMX。同时，通过富集方法获得的最大去除量为705.8、385.3和397.8 mg g${}^{-\mathrm{1个}}$FSP-1，FSP-2和FSP-3。结果表明，与超滤膜偶联的FSP是环境修复抗生素型污染物（例如AMX）的替代方法。