MOE Key Laboratory of Yellow River and Huai River Water Environmental and Pollution Control, Henan Key Laboratory for Environmental Pollution Control, School of Environment, Henan Normal University, Xinxiang, 453007, Henan, People's Republic of China.
Department of Environment Engineering, Yellow River Conservancy Technical Institute, Kaifeng Key Laboratory of Green Coating Materials, Kaifeng, 475004, Henan, People's Republic of China.
Environ Sci Pollut Res Int. 2019 Nov;26(32):33427-33439. doi: 10.1007/s11356-019-06511-1. Epub 2019 Sep 14.
The efficient removal of heavy metals from aqueous environment is imperative and challenging. A novel ternary composite constructed of diaminopyridine polymers, graphene oxide, and ferrite magnetic nanoparticles was designed by a facile in situ polymerization strategy for the removal of Pb(II) from aqueous solution. Detailed characterization of morphological, chemical, and magnetic properties was employed systematically to confirm the formation of the composite material. Batch adsorption experiment studies suggested that the composite was an excellent adsorbent for Pb(II) which was easily collected after use via exposure to an external magnetic field for 30 s. The effects of different parameters such as solution pH, adsorbent dosage, contact time, initial Pb(II) concentration, temperature, and co-existing ions were examined. The maximum adsorption capacity at pH = 5 was estimated to be 387.2 mg g at 298 K by the Langmuir isotherm model, accompanied by favorable adsorption recyclability according to the investigation of regeneration experiments. Thermodynamic studies revealed that the Pb(II) adsorption via our ternary composite was endothermic and spontaneous. The corresponding removal performance for effluent containing Pb(II) from the battery industry was successfully examined. The present results indicated that our designed adsorbent is beneficial to the practical Pb(II) removal in wastewater purification.
从水环境中高效去除重金属是当务之急，也是一项具有挑战性的任务。本研究通过简便的原位聚合策略设计了一种由二氨基吡啶聚合物、氧化石墨烯和铁氧体磁性纳米粒子组成的新型三元复合材料，用于从水溶液中去除 Pb(II)。系统地采用形态、化学和磁性特性的详细表征来确认复合材料的形成。批量吸附实验研究表明，该复合材料是一种优异的 Pb(II)吸附剂，使用后通过暴露于外部磁场 30 s 即可轻松收集。考察了不同参数（如溶液 pH 值、吸附剂用量、接触时间、初始 Pb(II)浓度、温度和共存离子）的影响。通过 Langmuir 等温模型估算，在 pH = 5 和 298 K 下，最大吸附容量为 387.2 mg g，根据再生实验的研究，吸附具有良好的可回收性。热力学研究表明，我们的三元复合材料通过吸附 Pb(II)是吸热和自发的。成功检验了该复合材料对来自电池行业含 Pb(II)废水的去除性能。研究结果表明，所设计的吸附剂有利于实际废水净化中的 Pb(II)去除。
