Central Metallurgical Research and Development Institute, Helwan, 11421, Cairo, Egypt.
Sci Rep. 2022 Jun 30;12(1):11016. doi: 10.1038/s41598-022-15187-6.
In the current study, a simple dry coating method was utilized to fabricate a super-hydrophobic super-magnetic powder (ZS@BIF) for oily water purification using zinc stearate (ZS) and banded iron formation (BIF). The produced composite was fully characterized as a magnetic sorbent for oily water treatment. The results of X-ray diffraction diffractometer (XRD), Fourier transform infrared (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscope (SEM), energy-dispersive X-ray spectroscopy (EDS) and particle size analysis revealed the fabrication of homogenous hydrophobic-magnetic composite particles with core-shell structure. Contact angle and magnetic susceptibility results showed that 4 (BIF): 1 (Zs) was the ideal coverage ratio to render the core material superhydrophobic and preserve its ferromagnetic nature. The capability of the fabricated composite to sorb. n-butyl acetate, kerosene, and cyclohexane from oil-water system was evaluated. ZS@BIF composite showed a higher affinity to adsorb cyclohexane than n-butyl acetate and kerosene with a maximum adsorption capacity of about 22 g g and 99.9% removal efficiency. Moreover, about 95% of the adsorbed oils could be successfully recovered (desorbed) by rotary evaporator and the regenerated ZS@BIF composite showed high recyclability over ten repeated cycles.
在当前的研究中，利用硬脂酸锌（ZS）和鲕绿泥石（BIF）开发了一种简单的干法涂层技术，用于制备超疏水超顺磁粉末（ZS@BIF）来净化含油污水。所制备的复合材料被充分表征为一种用于处理含油污水的磁性吸附剂。X 射线衍射仪（XRD）、傅里叶变换红外光谱（FTIR）、X 射线光电子能谱（XPS）、扫描电子显微镜（SEM）、能谱仪（EDS）和粒径分析的结果表明，均匀的疏水-磁性复合粒子具有核壳结构。接触角和磁化率结果表明，4（BIF）：1（ZS）是赋予核材料超疏水性并保持其铁磁性的理想覆盖比。所制备的复合材料从油水体系中吸附正丁醇、煤油和环己烷的能力进行了评估。ZS@BIF 复合材料对环己烷的吸附亲和力高于正丁醇和煤油，最大吸附容量约为 22 g g，去除效率达 99.9%。此外，通过旋转蒸发器可以成功回收（解吸）吸附的约 95%的油，再生的 ZS@BIF 复合材料在十个重复循环中表现出良好的可循环性。
