Fóris Tímea, Koska Péter, Ilosvai Ágnes Maria, Kristály Ferenc, Daróczi Lajos, Vanyorek László, Viskolcz Béla
Institute of Chemistry, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary.
Higher Education and Industrial Cooperation Centre, University of Miskolc, 3515 Miskolc-Egyetemváros, Hungary.
Int J Mol Sci. 2025 Jun 7;26(12):5467. doi: 10.3390/ijms26125467.
The removal of heavy metals from industrial wastewater remains a major environmental challenge, demanding efficient, sustainable solutions. This study explores the combined use of and amine-functionalized magnesium ferrite (MgFeO-NH) nanoparticles to remove cobalt ions from battery effluents. The research aims to explore the capacity of to adsorb heavy metals, followed by their separation using magnetic nanoparticles. Cobalt adsorption by was facilitated through the interaction of metal ions on the cell wall, achieving a removal efficiency of 96.44% within 30 min, which increased to 98.78% over 10 h. Amine-functionalized MgFeO nanoparticles, synthesized and characterized using HRTEM, FTIR, and VSM, displayed high surface reactivity due to the presence of -NH and -OH groups. At neutral pH, zeta potential measurements revealed a slightly negative charge (-5.6 ± 4.3 mV), while protonation at lower pH levels enhanced electrostatic interactions with the negatively charged algal biomass. Magnetic separation of the cobalt-adsorbed biomass achieved efficiencies ranging from 94.9% to 99.2% within 60 s, significantly outperforming conventional sedimentation methods. SEM and FTIR analyses confirmed the binding of nanoparticles to algal cell walls. The even distribution of MgFeO nanoparticles on algal surfaces was further validated by TEM imaging, and the strong magnetic properties of the nanoparticles enabled rapid and efficient separation under an external magnetic field.
从工业废水中去除重金属仍然是一项重大的环境挑战，需要高效、可持续的解决方案。本研究探索了[此处原文缺失相关物质]与胺功能化镁铁氧体（MgFeO-NH）纳米颗粒联合使用，以从电池废水中去除钴离子。该研究旨在探索[此处原文缺失相关物质]吸附重金属的能力，随后使用磁性纳米颗粒进行分离。[此处原文缺失相关物质]对钴的吸附通过金属离子与细胞壁的相互作用得以促进，在30分钟内实现了96.44%的去除效率，10小时内提高到98.78%。使用高分辨率透射电子显微镜（HRTEM）、傅里叶变换红外光谱（FTIR）和振动样品磁强计（VSM）合成并表征的胺功能化MgFeO纳米颗粒，由于存在-NH和-OH基团而显示出高表面反应性。在中性pH值下，zeta电位测量显示略带负电荷（-5.6±4.3 mV），而在较低pH值下的质子化增强了与带负电荷的藻类生物质的静电相互作用。吸附了钴的生物质的磁分离在60秒内实现了94.9%至99.2%的效率，明显优于传统的沉降方法。扫描电子显微镜（SEM）和傅里叶变换红外光谱（FTIR）分析证实了纳米颗粒与藻类细胞壁的结合。MgFeO纳米颗粒在藻类表面的均匀分布通过透射电子显微镜（TEM）成像进一步得到验证，并且纳米颗粒的强磁性使得在外部磁场下能够快速有效地分离。
