As a natural, non-toxic adsorbent, chitosan is well suited for the removal of heavy metals and antibiotics. In this study, chitosan was modified with polypropylene glycol and itaconic anhydride to improve the mechanical properties of chitosan, and the polypropylene glycol-itaconic anhydride-chitosan adsorbent was successfully prepared. The adsorbent was characterised and analysed by Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis and X-ray photoelectron spectroscopy (XPS). The effects of the different conditions on the adsorption of Pb2+ and cephalexin were investigated. The Langmuir adsorption isotherm model showed that the maximum adsorption capacities of Pb2+ and cephalexin could reach 431.73 mg g−1 and 153.72 mg g−1, respectively. The possible adsorption mechanism of Pb2+ and cephalexin was discussed.

中文翻译：

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新型改性壳聚糖的制备及其在去除铅和头孢氨苄中的应用

作为一种天然、无毒的吸附剂，壳聚糖非常适合去除重金属和抗生素。本研究通过聚丙二醇和衣康酸酐对壳聚糖进行改性，提高了壳聚糖的力学性能，成功制备了聚丙二醇-衣康酸酐-壳聚糖吸附剂。通过傅里叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、热重分析和X射线光电子能谱（XPS）对吸附剂进行了表征和分析。不同条件对Pb吸附的影响2+和头孢氨苄进行了研究。Langmuir 吸附等温线模型表明 Pb 的最大吸附容量2+头孢氨苄含量可达431.73 mg·g−1和 153.72 毫克克−1， 分别。Pb的可能吸附机理2+并讨论了头孢氨苄。