Herein, a novel magnetite core decorated with amine functionalized mesoporous silica include significant surface area (ca. 885 m² g⁻¹) has been successfully prepared. Cetyltrimethylammonium bromide as a pore-forming agent was eliminated from the structure through a combination of two methods (calcination and modified extraction via supercritical CO₂). This inventive strategy leads to form magnetic mesoporous silica microspheres that enhance the capacity of adsorption of Pb²⁺, (ca. 989 mg g⁻¹). In addition, the recycling of this adsorbent from aqueous medium using high gradient magnetic separation (HGMS) was also explored and for obtaining the efficiency of separation some tests were accomplished using different matrix geometries. The separation efficiency of adsorbent via fine-matrix was more successful than a coarse matrix. Utilizing a combined arrangement of a fine and a coarse matrix, the performance of the separation was increased considerably comparing the single-stage separation chamber. About 93% of the magnetic adsorbent could be separated when the flow rate and magnitude of the magnetic field were fixed at 7.2 mL s⁻¹ and 0.33 m T, respectively. Generally, this work was developed high efficient adsorbent for water treatment and well planned separation of adsorbent from treated water by HGMS that can be used in a large-scale.

在此，已经成功地制备了用胺官能化的介孔二氧化硅装饰的新颖的磁铁矿芯，其具有显着的表面积（约885m ² g ^-1）。通过两种方法（煅烧和通过超临界CO _2的改性萃取）的组合，从结构中消除了作为孔形成剂的十六烷基三甲基溴化铵。该发明策略导致形成磁性中孔二氧化硅微球，其增强了Pb ²⁺的吸附能力（约989 mg g ^-1）。此外，还探索了使用高梯度磁分离（HGMS）从水性介质中回收这种吸附剂的方法，并且为了获得分离效率，使用不同的基质几何形状完成了一些测试。吸附剂通过细基质的分离效率比粗基质更成功。与单级分离室相比，利用精细和粗糙基质的组合布置，可以大大提高分离性能。当磁场的流速和大小固定为7.2 mL s ^-1时，大约93％的磁性吸附剂可以分离。和0.33 m T，分别。通常，这项工作是开发用于水处理的高效吸附剂，并通过可大规模使用的HGMS精心计划地从处理后的水中分离吸附剂。