Antibiotic contamination in wastewater is an urgent environmental and public health concern because conventional treatment methods are ineffective in completely removing these pollutants. Iron-modified biochar, synthesized from agricultural waste, is proposed as an efficient and sustainable media for removal of ciprofloxacin and amoxicillin from wastewater. Iron-modified biochar was synthesized using a simple pyrolysis process with corn and ferrous sulfate as feedstock. Adsorbents were characterized by fourier transform infrared spectroscopy, X-Ray diffraction, and scanning electron microscopy. Removal performance of antibiotics was evaluated under different conditions, including antibiotic dosage, concentration of hydrogen peroxide, pH, and amount of humic acid. The results demonstrated high removal efficiencies of 87% for ciprofloxacin and 83% for amoxicillin within 25 min. Mechanistic studies revealed the generation of hydroxyl radicals (^•OH) and singlet oxygen (¹O₂), and confirmed the activation of hydrogen peroxide in the system. These findings highlight the potential of iron-modified biochar as a sustainable and effective catalyst for antibiotic removal, offering a promising solution for reducing pharmaceutical contamination in wastewater.

废水中的抗生素污染是一个紧迫的环境和公共卫生问题，因为传统的处理方法无法有效地完全去除这些污染物。从农业废弃物合成的铁改性生物炭被提议作为一种高效且可持续的介质，用于从废水中去除环丙沙星和阿莫西林。铁改性生物炭是以玉米和硫酸亚铁为原料，使用简单的热解工艺合成的。通过傅里叶变换红外光谱、X 射线衍射和扫描电子显微镜对吸附剂进行表征。评估不同条件下抗生素的去除性能，包括抗生素剂量、过氧化氢浓度、pH 值和腐植酸量。结果表明，环丙沙星在 25 分钟内的去除效率高达 87%，阿莫西林的去除效率高达 83%。机理研究揭示了羟基自由基 （^•OH） 和单线态氧 （¹O₂） 的产生，并证实了系统中过氧化氢的激活。这些发现强调了铁改性生物炭作为可持续和有效抗生素去除催化剂的潜力，为减少废水中的药物污染提供了一种有前途的解决方案。