Gum ghatti (Gg) and acrylamide (AAm) grafted copolymer [poly (Gg-AAm)] coated by zero valent iron (ZVI) was developed to remove toxic Congo red (CR) from waste water. Prepared composite, [poly (Gg-AAm)/ZVI] was characterized by FESEM, TEM, BET, FTIR and XRD. CR adsorption from water using [poly (Gg-AAm)/ZVI] was investigated and several parameters discussed, such as solution pH, contact time, dosage and temperature to find out removal efficiency of polymer composite. The kinetic data for the adsorption of CR followed the pseudo-second-order model and the Langmuir maximum adsorption capacity for CR at pH 7.0 were found to be 153.8, 200 and 250 mg/g at 25, 35 and 45 °C correspondingly. Desorption studies revealed that prepared composite can be used up to three cycles efficiently and thermodynamic parameters such as Gibbs free energy (ΔG⁰), enthalpy (ΔH⁰) and entropy (ΔS⁰) changes showed the adsorption of CR onto [poly (Gg-AAm)/ZVI] was feasible, spontaneous and endothermic.

开发了涂有零价铁（ZVI）的口香糖（Gg）和丙烯酰胺（AAm）接枝共聚物[poly（Gg-AAm）]，以去除废水中的有毒刚果红（CR）。通过FESEM，TEM，BET，FTIR和XRD对制备的复合物[聚（Gg-AAm）/ ZVI]进行表征。研究了使用[聚（Gg-AAm）/ ZVI]从水中吸附CR的方法，并讨论了溶液pH，接触时间，剂量和温度等几个参数，以求出聚合物复合材料的去除效率。遵循伪二级模型对CR的吸附动力学数据，在25、35和45°C下，Langmuir在pH 7.0时对CR的最大吸附容量分别为153.8、200和250 mg / g。解吸研究表明，制备的复合材料最多可有效使用三个循环，热力学参数例如吉布斯自由能（ΔG⁰），焓（ΔH ⁰）和熵（ΔS ⁰）变更显示CR吸附到[聚（GG-AAM）/ ZVI]是可行的，自发的和吸热的。