A high-efficiency graphene oxide-terminated hyperbranched amino polymer-carboxymethyl cellulose ternary nanocomposite (GO-HBP-NH₂-CMC) was fabricated for adsorbing heavy metals from aqueous solutions. The adsorbent was characterized by SEM, FT-IR, Raman, and XPS analyses showing its porous architecture, rough surface, abundant N- and O-containing functional groups providing enhanced binding ability towards Pb²⁺ and Cu²⁺. Experimental adsorption data fitted well to the pseudo-second-order kinetics and Langmuir isotherm models, indicating the adsorption of GO-HBP-NH₂-CMC towards Pb²⁺ and Cu²⁺ being a chemical and monolayer process. The maximum adsorption capacities of GO-HBP-NH₂-CMC for Pb²⁺ and Cu²⁺ at 25 °C comprised 152.86 and 137.48 mg/g, respectively. The laboratory-scale experimental study into the Pb²⁺ and Cu²⁺ adsorption in a fixed-bed column was undertaken. Effects of flow rate, bed depth and influent metals concentration on the adsorption performance were assessed. Experimental data successfully correlated with the Adams-Bohart, Thomas and Yoon-Nelson models with the R² exceeding 0.79. Density functional theory calculation was adopted to study interactions between functional groups at GO-HBP-NH₂-CMC and heavy metals showing OH, NH₂ and COOH moieties in GO-HBP-NH₂-CMC being more likely to bind Pb²⁺ rather than Cu²⁺, while the binding abilities of -CONH- towards Pb²⁺ and Cu²⁺ were similar.

制备了一种高效氧化石墨烯封端的超支化氨基聚合物-羧甲基纤维素三元纳米复合材料（GO-HBP-NH ₂ -CMC），用于从水溶液中吸附重金属。通过SEM，FT-IR，拉曼和XPS分析对吸附剂进行了表征，表明吸附剂具有多孔结构，粗糙的表面，丰富的N和O官能团，从而增强了与Pb ²⁺和Cu ^2+的结合能力。实验吸附数据很好地拟合了拟二级动力学和Langmuir等温模型，表明GO-HBP-NH ₂ -CMC对Pb ²⁺和Cu ²⁺的吸附是化学和单层过程。GO-HBP-NH的最大吸附量25°C下Pb ²⁺和Cu ^2+的₂ -CMC分别为152.86和137.48 mg / g。对固定床色谱柱中的Pb ²⁺和Cu ²⁺吸附进行了实验室规模的实验研究。评估了流速，床深度和进水金属浓度对吸附性能的影响。实验数据与R ²超过0.79的Adams-Bohart，Thomas和Yoon-Nelson模型成功关联。采用密度泛函理论计算研究GO-HBP-NH ₂ -CMC上的官能团与GO-HBP-NH中显示OH，NH ₂和COOH部分的重金属之间的相互作用₂ -CMC更可能结合Pb ²⁺而不是Cu ²⁺，而-CONH-对Pb ²⁺和Cu ²⁺的结合能力相似。