Klekotka Urszula, Zambrzycka-Szelewa Elżbieta, Satuła Dariusz, Kalska-Szostko Beata
Faculty of Chemistry, University of Bialystok, Ciołkowskiego 1K, 15-245 Białystok, Poland.
Faculty of Physics, University of Bialystok, Ciołkowskiego 1L, 15-245 Bialystok, Poland.
Materials (Basel). 2021 Sep 4;14(17):5069. doi: 10.3390/ma14175069.
In the presented paper, studies of magnetite nanoparticle stability in selected environmental solutions are reported. The durability tests were performed in four types of liquids: treated and untreated wastewater, river water, and commercial milk (0.5% fat). Nanoparticles before and after deposition in the testing conditions were measured by transmission electron microscopy, X-ray diffraction, infrared spectroscopy, and Mössbauer spectroscopy. The amount of Fe atoms transferred into the solutions was estimated on the basis of flame atomic absorption spectroscopy. The analysis of the obtained results shows good stability of the tested nanoparticles in all water solutions. They do not change their structure or magnetic properties significantly, which makes them a good candidate to be used as, for example, detectors of specific compounds or heavy metals. On the other hand, studies show that particles are stable in environmental conditions for a long period of time in an unchanged form, which can cause their accumulation; therefore, they may be hazardous to living organisms.
在本论文中，报道了对选定环境溶液中磁铁矿纳米颗粒稳定性的研究。耐久性测试在四种类型的液体中进行：经过处理和未经处理的废水、河水以及市售牛奶（脂肪含量0.5%）。通过透射电子显微镜、X射线衍射、红外光谱和穆斯堡尔光谱对测试条件下沉积前后的纳米颗粒进行了测量。基于火焰原子吸收光谱法估算了转移到溶液中的铁原子量。对所得结果的分析表明，所测试的纳米颗粒在所有水溶液中具有良好的稳定性。它们的结构或磁性没有明显变化，这使其成为例如用作特定化合物或重金属探测器的良好候选材料。另一方面，研究表明颗粒在环境条件下能长时间以不变的形式保持稳定，这可能导致其积累；因此，它们可能对生物体有害。
