Cu (II) is one of the most harmful heavy metals in the environment, due to the hazardous effects to aquatic organisms, plants, animals, and human beings. In this work, a novel modified magnetic biochar (MBC@APTES-PAMAM) was prepared by PAMAM dendrimer for the removal of Cu (II). The analysis of structural properties identically demonstrated that the abundant -NH₂ groups were successfully loaded onto magnetic biochar surfaces. The sorption kinetics process of Cu (II) onto MBC@APTES-PAMAM was better fitted by the pseudo-second-order model. Langmuir isotherm model was better described for Cu (II) sorption process. MBC@APTES-PAMAM showed outstanding performances on Cu (II) removal, and the maximal adsorption amount was 251.81 mg/g. Adsorption experiment indicated that MBC@APTES-PAMAM had a higher Cu (II) removal efficiency under the pH range from 2 to 8. The adsorption capacity of Cu (II) onto MBC@APTES-PAMAM was decreased in the presence of competing ions. The existence of surfactant and humic acid had great influences on Cu (II) adsorption process. The Cu (II) adsorption mechanism was connected to the -NH₂ by complexation reaction, due to the increased electrostatic attraction and bridging influences. In addition, MBC@APTES-PAMAM also exhibited comparable removal performances for COD (70.82%), TN (71.10%), TP (100%), NH₃N (55.03%) and Cu (II) (99.68%) in the practical treatment of landfill leachate. Overall, MBC@APTES-PAMAM is a green, low-cost, and high efficiency adsorbent for Cu (II) removal.

铜（II）由于对水生生物，植物，动物和人类有害，因此是环境中最有害的重金属之一。在这项工作中，由PAMAM树枝状大分子制备了一种新型的改性磁性生物炭（MBC @ APTES-PAMAM），用于去除Cu（II）。结构性分析同样表明，-NH ₂含量丰富。小组成功地加载到磁性生物炭的表面上。拟二级模型较好地拟合了MBC @ APTES-PAMAM上Cu（II）的吸附动力学过程。Langmuir等温线模型对于Cu（II）吸附过程有更好的描述。MBC @ APTES-PAMAM在去除铜（II）方面表现出优异的性能，最大吸附量为251.81 mg / g。吸附实验表明，MBC @ APTES-PAMAM在2至8的pH范围内具有较高的Cu（II）去除效率。在竞争离子的存在下，MBC @ APTES-PAMAM对Cu（II）的吸附能力降低。表面活性剂和腐殖酸的存在对Cu（II）的吸附过程有很大的影响。Cu（II）的吸附机理与-NH _2有关通过络合反应，由于增加的静电引力和架桥影响。此外，MBC @ APTES-PAMAM还表现出可比的COD（70.82％），TN（71.10％），TP（100％），NH ₃ N（55.03％）和Cu（II）（99.68％）去除性能。垃圾渗滤液的实际处理。总体而言，MBC @ APTES-PAMAM是一种绿色，低成本，高效的吸附剂，用于去除Cu（II）。