A new adsorbent, starch grafted polyacrylic acid copolymer with polyacrylamide (SG@AA-co-AM), was synthesized using free radical polymerization techniques. Proton nuclear magnetic resonance (¹H NMR), Fourier-transform infrared spectrophotometry (FTIR), X-ray diffraction analysis (XRD), thermogravimetric analysis (TGA), scanning electron microscopy (SEM), particle size distribution (PSD), and fluorescent electron microscopy (FEM) were employed to elucidate the structure, crystalline nature, thermal stability, and surface morphology of SG@AA-co-AM. SG@AA-co-AM was utilized as an adsorbent for the removal of Victoria green B (VGB) dye from wastewater. SG@AA-co-AM exhibited a removal percentage (% R) of 97.6% towards VGB under optimized conditions: a contact time of 30 min, temperature of 25 °C, adsorbent dose of 20 mg, pH of 8, concentration of dye solution of 20 ppm, and volume of dye solution of 30 mL. The point of zero charge (PZC) for SG@AA-co-AM was determined to be 5.2. Nonlinear pseudo-second-order (PSO) and Langmuir adsorption isotherm models best fitted to the experimental data, with regression coefficients (R²) of 0.95 and 0.99, respectively. The results confirmed the chemi-sorption and monolayer adsorption of VGB onto SG@AA-co-AM. Thermodynamic studies revealed that the adsorption of VGB onto SG@AA-co-AM is endothermic and spontaneous. Furthermore, the regeneration experiment showed a decline of 3.9% after five cycles, confirming the economical and reusable nature of SG@AA-co-AM.

采用自由基聚合技术合成了一种新型吸附剂——淀粉接枝聚丙烯酸与聚丙烯酰胺的共聚物(SG@AA-co-AM)。质子核磁共振 ( ¹ H NMR)、傅里叶变换红外分光光度法 (FTIR)、X 射线衍射分析 (XRD)、热重分析 (TGA)、扫描电子显微镜 (SEM)、粒度分布 (PSD) 和荧光分析采用电子显微镜（FEM）来阐明 SG@AA-co-AM 的结构、晶体性质、热稳定性和表面形貌。 SG@AA-co-AM 用作吸附剂，用于去除废水中的维多利亚绿 B (VGB) 染料。在优化条件下，SG@AA-co-AM 对 VGB 的去除率 (% R) 为 97.6%：接触时间 30 分钟，温度 25 °C，吸附剂剂量 20 mg，pH 8，染料浓度20 ppm 的溶液和 30 mL 的染料溶液体积。 SG@AA-co-AM 的零电荷点 (PZC) 确定为 5.2。非线性伪二阶 (PSO) 和 Langmuir 吸附等温线模型最适合实验数据，回归系数 (R ² ) 分别为 0.95 和 0.99。结果证实了 VGB 在 SG@AA-co-AM 上的化学吸附和单层吸附。热力学研究表明，SG@AA-co-AM 上 VGB 的吸附是吸热且自发的。此外，再生实验显示五个循环后下降了3.9%，证实了SG@AA-co-AM的经济性和可重复使用性。