In this study, nanoscale zero-valent iron has been prepared through the reduction method by sodium borohydride and then was used for removal of Cu(II) from aqueous solutions. The XRD analysis proved the high crystallinity of synthesized nZVI particles, and the calculated particle size was found to be 72 nm, which corresponds to a specific surface area of 10.68 m²/kg. The SEM analysis provided images about the morphologies of nZVI particles before/after Cu(II) adsorption, which revealed that the nZVI particles are spherical and tend to aggregate together in chain-like agglomerates. Besides, after Cu(II) adsorption, the SEM image evidenced a disparity in the structure of nZVI particles. The mineral composition of nZVI particles before/after Cu(II) adsorption was examined using XRF, which demonstrated that the nZVI particles were mainly composed of iron metal by up to 74.16%, and further proved the successful adsorption for Cu(II) onto nZVI particles. Kinetics, isotherms, and thermodynamics studies were showed that the adsorption process obeyed the pseudo-second-order, well-fitted to monolayer Langmuir isotherm with a maximum adsorption capacity of 54.35 mg/g, and have endothermic spontaneously nature, respectively. Both the released dissolved iron ions and the yielded turbidity that co-occurred along with the nZVI/Cu reaction were monitored. The dissolved iron concentrations recorded the highest value reached up to 106.3 mg/L at pH 1.0, while the turbidity dramatically increased to 32, and 35 NTU with increases in nZVI dosages and initial Cu(II) ion concentrations, respectively. Finally, some explanations have been suggested to represent the Cu(II) ion removal mechanisms onto nZVI particles.

在这项研究中，已经通过硼氢化钠的还原方法制备了纳米级零价铁，然后用于从水溶液中去除Cu（II）。X射线衍射分析证明合成的nZVI颗粒具有高结晶度，发现计算出的粒径为72 nm，对应于10.68 m ²的比表面积。/公斤。SEM分析提供了有关Cu（II）吸附之前/之后nZVI颗粒形态的图像，这表明nZVI颗粒是球形的，并且倾向于以链状团聚体的形式聚集在一起。此外，在Cu（II）吸附后，SEM图像证明了nZVI颗粒的结构存在差异。利用X射线荧光光谱仪检测了Cu（II）吸附前后nZVI颗粒的矿物组成，表明nZVI颗粒主要由铁金属组成，含量高达74.16％，进一步证明了Cu（II）在nZVI上的成功吸附。粒子。动力学，等温线和热力学研究表明，吸附过程遵循拟二级反应，非常适合单层Langmuir等温线，最大吸附量为54.35 mg / g，具有自发吸热特性，分别。监测释放的溶解的铁离子和与nZVI / Cu反应一起发生的产生的浊度。在pH 1.0时，溶解的铁浓度达到最高值，达到106.3 mg / L，而浊度随着nZVI剂量和初始Cu（II）离子浓度的增加而显着增加至32和35 NTU。最后，有人提出了一些解释来表示nZVI颗粒上的Cu（II）离子去除机理。和35 NTU分别增加nZVI剂量和初始Cu（II）离子浓度。最后，有人提出了一些解释来表示nZVI颗粒上的Cu（II）离子去除机理。和35 NTU分别增加nZVI剂量和初始Cu（II）离子浓度。最后，有人提出了一些解释来表示nZVI粒子上的Cu（II）离子去除机理。