核壳结构的磁性铁锰复合氧化物对铅离子的吸附特性研究

通过共沉淀法制备了吸附剂--核壳结构的磁性铁锰复合氧化物,并应用于模拟废水中吸附Pb²⁺。通过调控磁性铁锰复合氧化物中铁和锰的比例、吸附时间和含Pb²⁺废水的pH值等参数,优化磁性铁锰复合氧化物对铅离子的吸附条件。研究结果表明,吸附条件为: 铁锰比3∶1、吸附时间60 min、pH=8,此时核壳结构的磁性铁锰复合氧化物对Pb²⁺的吸附量达到最大值24.99 mg/g。以Fe₃O₄为磁芯制备的磁性铁锰复合氧化物具有磁性,可通过磁性分离的方法瞬间从废水中分离出吸附剂,为该吸附剂的应用及回收利用提供了方便。

Adsorption Characteristics of Magnetic Fe-Mn Binary Oxides with Core-Shell Structure

An adsorbent, one magnetic Fe-Mn binary oxide with a core-shell structure, was prepared by the co-precipitationmethod, and was used to adsorb Pb2+ in the simulated wastewater. By regulating the ratio of iron to manganese in the magnetic Fe-Mn binary oxide, the adsorption time and the pH value of the Pb²⁺-containing wastewater, the adsorption conditions of Pb²⁺ onto the magnetic Fe-Mn binary oxide were optimized. The research results show that with the iron-manganese ratioof 3∶1, adsorption time of 60 min and pH of 8, the adsorption capacity of Pb²⁺ onto magnetic Fe-Mn binary oxide with a core-shell structure can maximally reach 24.99 mg/g. The Fe-Mn binary oxide prepared with Fe₃O₄ as the magnetic core, due to being magnetic, can separate the adsorbent from the wastewater instantly by magnetic separation, indicating the application and recycling of this adsorbent is feasible and convenient.