Porous flowers-like magnesium oxide (MgO) was prepared using a facile and low-cost method. The structure, morphology and pore properties of prepared MgO were investigated. The results revealed that as-prepared MgO possesses hierarchical flowers-like structural features with a large surface area of 117.48 m² g⁻¹. Excellent adsorption capacity, towards phosphate and methyl orange, was exhibited by the fabricated MgO having an adsorption capacity of 724 mg g⁻¹ and 1715 mg g⁻¹ for phosphate and methyl orange respectively. The experimental data better fitted the pseudo-second-order and Freundlich isotherm model demonstrating multilayer adsorption of pollutants onto MgO adsorbent with endothermic nature. In five consecutive adsorptions/desorption cycles, the regenerated particles retained their adsorption performance. This work provides a pathway for the large-scale development of efficient adsorbent materials to overcome the sustainable problems.

多孔的花状氧化镁（MgO）使用简便且低成本的方法制备。研究了制备的MgO的结构，形貌和孔隙性质。结果表明，所制备的MgO具有分层的花状结构特征，具有117.48m ² g ^-1的大表面积。所制得的MgO具有724 mg g ^-1和1715 mg g ^-1的吸附能力，对磷酸盐和甲基橙表现出优异的吸附能力。分别用于磷酸盐和甲基橙。实验数据更好地拟合了伪二阶和Freundlich等温线模型，该模型证明了污染物在具有吸热特性的MgO吸附剂上的多层吸附。在五个连续的吸附/解吸循环中，再生颗粒保持了其吸附性能。这项工作为大规模开发有效的吸附材料提供了一条途径，以克服可持续性问题。