Petrochemicals Department, Egyptian Petroleum Research Institute, Cairo, Egypt.
Physics Department, Faculty of Science, Tanta University, Tanta, Egypt.
Environ Sci Pollut Res Int. 2020 Jun;27(16):19038-19048. doi: 10.1007/s11356-018-3557-y. Epub 2018 Nov 7.
The efficiency of the as-prepared MgCoFeO spinel nanoparticles for adsorption of crude oil from aqueous solution was improved by blending them with chitosan hydrogel (CH) prepared using epichlorohydrin as cross-linker resulting (CH/MgCoFeO) nanocomposites. MgCoFeO nanocrystals was prepared by the chemical co-precipitation method and characterized by using X-ray diffraction (XRD), infrared spectroscopy (FT-IR), scanning electron microscope (SEM), transmission electron microscope (TEM), and differential thermal analysis (DTA)/thermogravimetric analysis (TGA). DTA/TGA results showed that the net weight loss of the samples heated from room temperature up to 1000 °C lies in the range 2.2-26.5% weight, where the maximum weight loss appeared at 100 °C and 614 °C. The blending nanocomposites prepared, were characterized by FT-IR and SEM micrographs. The effect of the nanoparticles ratio on the water uptake of nanocomposites and their capability to adsorb the crude oil was estimated by the gravimetric method. TEM results showed that the average nanoparticle size (Z) of MgCoFeO is 30.06 nm and the SEM illustrated the presence of a very clear and rough layer of pores which are homogenously arranged structures that could play an important role in the adsorption and stability of crude oil on polymers. The adsorption ability of crude oil from waste water on the CH/MgCoFeO nanocomposites hydrogel was reported and it was found that the CH/MgCoFeO with 95/5% ratio showed the improvement in the oil adsorption (72.5%) than the 0/100% one (50.2%). As a consequence, it is highly suggested that the potential of blending CH with MgCoFeO to obtain CH/MgCo75Fe2O for enhancing crude oil adsorption in oily waste water treatment with a low cost.
用氯化环氧丙烷作为交联剂制备壳聚糖水凝胶（CH），并将其与尖晶石纳米粒子（MgCoFeO）共混，提高了其从水溶液中吸附原油的效率。采用化学共沉淀法制备 MgCoFeO 纳米晶，并采用 X 射线衍射（XRD）、红外光谱（FT-IR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和差示热分析（DTA）/热重分析（TGA）对其进行了表征。DTA/TGA 结果表明，从室温加热到 1000°C 的样品的净失重率在 2.2-26.5%重量之间，最大失重出现在 100°C 和 614°C。用 FT-IR 和 SEM 显微照片对共混纳米复合材料进行了表征。通过重量法估计了纳米粒子比例对纳米复合材料吸水量及其吸附原油能力的影响。TEM 结果表明，MgCoFeO 的平均纳米颗粒尺寸（Z）为 30.06nm，SEM 图说明了存在非常清晰和粗糙的多孔层，这些孔均匀排列的结构在聚合物上吸附和稳定原油方面起着重要作用。报道了 CH/MgCoFeO 纳米复合材料水凝胶从废水中吸附原油的能力，发现 95/5%比例的 CH/MgCoFeO 比 0/100%的 CH/MgCoFeO 对原油的吸附能力提高了（72.5%）。因此，强烈建议将 CH 与 MgCoFeO 混合以获得 CH/MgCo75Fe2O，从而以低成本提高含油废水处理中对原油的吸附能力。
