In this work, we synthesized a novel hydrogel based on poly(acrylamide) grafted Guar/locust bean gums, i.e. (GG/LBG-g-poly(AAm)) through free radical polymerization, aiming for the removal of malachite green (MG) dye from aqueous solutions. Response surface methodology and a full factorial rotatable central composite design were used to optimize various reaction parameters, enhancing the percentage swelling of the synthesized hydrogel. This optimization resulted in a notable increase in swelling capacity, reaching 1050%. The incorporation of acrylamide chains onto the guar/locust bean gum-based hybrid backbone, as well as crosslinking between different polymeric chains, was confirmed through various characterization techniques, including FTIR, TGA, XRD, FE-SEM, wettability studies, and zeta potential analysis. We evaluated the synthesized hydrogel adsorption performance for MG under specific conditions: pH (7.0), contact time (300 min), adsorbent dose (0.08 g), and dye concentration (50 mg/L). Under ambient conditions, GG/LBG-g-poly(AAm) demonstrated a maximum adsorption capacity of 52.96 mg g⁻¹, achieving a removal efficiency of 98%. The Freundlich model best described the adsorption data and followed pseudo-second-order kinetics, indicating a consistent agreement. Furthermore, the Dubinin-Radeshkovich isotherm and Elovich model perfectly depicted the chemisorption nature of the adsorption process. The synthesized GG/LBG-g-poly(AAm) demonstrates significant potential for effectively removing toxic dyes from wastewater.

在这项工作中，我们通过自由基聚合合成了一种基于聚丙烯酰胺接枝瓜尔豆/刺槐豆胶的新型水凝胶，即(GG/LBG-g-poly(AAm))，旨在去除孔雀石绿(MG)水溶液中的染料。使用响应面方法和全因子可旋转中心复合材料设计来优化各种反应参数，提高合成水凝胶的溶胀百分比。这种优化导致膨胀能力显着增加，达到 1050%。通过各种表征技术，包括 FTIR、TGA、XRD、FE-SEM、润湿性研究和 zeta 电位，证实了丙烯酰胺链在瓜尔胶/刺槐豆胶基混合主链上的结合，以及不同聚合物链之间的交联分析。我们评估了合成水凝胶在特定条件下对 MG 的吸附性能：pH (7.0)、接触时间 (300 分钟)、吸附剂剂量 (0.08 g) 和染料浓度 (50 mg/L)。在环境条件下，GG/LBG-g-poly(AAm)的最大吸附容量为52.96 mg g ^-1，去除效率为98%。 Freundlich 模型最好地描述了吸附数据并遵循伪二级动力学，表明一致的一致性。此外，Dubinin-Radeshkovich 等温线和 Elovich 模型完美地描述了吸附过程的化学吸附性质。合成的 GG/LBG-g-poly(AAm) 显示出有效去除废水中有毒染料的巨大潜力。