以木聚糖为原料，以丙烯酸、N-异丙基丙烯酰胺为功能单体，N，N'-亚甲基双丙烯酰胺为交联剂，在光引发剂安息香二甲醚紫外引发下，通过接枝聚合，制备水凝胶吸附剂。利用傅里叶变换红外光谱仪（FTIR）、扫描电子显微镜（SEM）分析水凝胶吸附剂的结构，并研究pH值、吸附剂用量、金属离子初始质量浓度、吸附时间对Cu^{2 +}吸附性能的影响。结果表明：Cu²⁺吸附量随Cu²⁺溶液pH值的增大而增大。当Cu²⁺浓度为300 mg/L，pH值为5.0时，对Cu^{2 +}的最大吸附容量为290 mg/g，吸附率达92%。水凝胶对Cu²⁺的吸附为离子交换机制，吸附行为符合动力学假二级模型。

Using xylan as the raw material, acrylic acid, N-isopropylacrylamide as functional monomers, and N, N'-methylenebisacrylamide as a crosslinking agent, hydrogel adsorbents were prepared through graft polymerization under ultraviolet initiation with photoinitiator benzoin dimethyl ether. The structure of the hydrogel adsorbent was analyzed using Fourier-transform infrared spectroscopy (FTIR) and scanning electron microscopy (SEM). The effects of pH value, adsorbent dosage, initial mass concentration of metal ions, and adsorption time on the adsorption performance of Cu²⁺ were studied. The results show that the adsorption capacity of Cu²⁺ increases with the increase of the pH of the Cu²⁺ solution. When the Cu²⁺ concentration is 300 mg/L and the pH value is 5.0, the maximum adsorption capacity for Cu²⁺ is 290 mg/g, with an adsorption rate of 92%. The adsorption of Cu²⁺ by the hydrogel follows an ion exchange mechanism, and the adsorption behavior conforms to the pseudo-second-order kinetic model.