Study on the Adsorption of Pb<sup>2+</sup> by D412 Resin

采用D412树脂吸附溶液中的Pb2+，重点探究了初始浓度、反应时间、pH以及其他离子对该树脂吸附Pb2+的影响。结果表明：该树脂最大吸附量约为186 mg/g，且在960 min内达到吸附平衡，pH为5或6时吸附性能最佳，且吸附性能几乎不受其他离子影响，具有一定的选择性吸附效果。通过对吸附行为的研究，该过程符合Langmuir吸附等温模型、准二级动力学模型。这为实际废水中Pb2+的分离富集提供了有益的理论参考。This study utilized D412 resin for the adsorption of Pb2+ from aqueous solutions. The effects of initial concentration, reaction time, pH, and coexisting ions on the adsorption efficiency of Pb2+ were systematically investigated. The results indicated that the maximum adsorption capacity of the resin reached approximately 186 mg/g, with adsorption equilibrium attained within 960 minutes. Optimal adsorption performance was observed at pH 5-6. Notably, the adsorption capacity remained largely unaffected by the presence of other ions, demonstrating favorable selective adsorption characteristics. Further analysis revealed that the adsorption process followed the Langmuir isotherm model and pseudo-second-order kinetic model. These findings provide valuable theoretical insights for the separation and enrichment of Pb2+ in practical wastewater treatment applications.