Uddin Md Jamal, Jeong Yeon-Koo
Department of Environmental Engineering, Kumoh National Institute of Technology, 61 Daehak-ro, Gumi, Gyeongbuk, 39177, Republic of Korea.
Environ Sci Pollut Res Int. 2022 Feb;29(7):9422-9447. doi: 10.1007/s11356-021-17287-8. Epub 2021 Dec 1.
Nanoadsorbents having large specific surface area, high pore volume with tunable pore size, affordability and easy magnetic separation gained much popularity in recent time. Iron-based nanoadsorbents showed higher adsorption capacity for different pollutant removal from water among other periodic elements. Spinel ferrite nanomaterials among iron-bearing adsorbent class performed better than single iron oxide and hydroxides due to their large surface area, mesoporous pore, high pore volume and stability. This work aimed at focusing on water treatment using magnesium ferrite (MgFeO) nanomaterials. Synthesis routes, properties and pollutant adsorption were critically investigated to explore the performance of magnesium ferrite in water treatment. Structural and surface properties were greatly affected by the factors involved in different synthesis routes and iron and magnesium ratio. Complete removal of pollutants through adsorption was achieved using magnesium ferrite. Pollutant adsorption capacity of MgFeO and its modified forms was found several folds higher than FeO and FeO nanomaterials. In addition, MgFeO showed strong stability in water than other pure iron oxide and hydroxide. Modification with graphene oxide, activated carbon, biochar and silica was demonstrated to be beneficial for enhanced adsorption capacity. Complex formation was suggested as a dominant mechanism for pollutant adsorption. These nanomaterials could be a viable and competitive adsorbent for diverse pollutant removal from water.
具有大比表面积、高孔容且孔径可调、价格低廉以及易于磁分离的纳米吸附剂近年来广受欢迎。在其他周期元素中，铁基纳米吸附剂对水中不同污染物的去除表现出更高的吸附容量。含铁吸附剂类别中的尖晶石铁氧体纳米材料由于其大表面积、介孔孔道、高孔容和稳定性，比单一的铁氧化物和氢氧化物表现更好。这项工作旨在聚焦于使用镁铁氧体（MgFeO）纳米材料进行水处理。对合成路线、性质和污染物吸附进行了严格研究，以探索镁铁氧体在水处理中的性能。不同合成路线以及铁和镁比例所涉及的因素对结构和表面性质有很大影响。使用镁铁氧体通过吸附实现了污染物的完全去除。发现MgFeO及其改性形式的污染物吸附容量比FeO和FeO纳米材料高出数倍。此外，MgFeO在水中比其他纯铁氧化物和氢氧化物表现出更强的稳定性。已证明用氧化石墨烯、活性炭、生物炭和二氧化硅进行改性有利于提高吸附容量。提出络合物形成是污染物吸附的主要机制。这些纳米材料可能是用于从水中去除多种污染物的可行且有竞争力的吸附剂。
