Author:
Ali Shimaa M.,El Mansop Mohamed A.,Galal Ahmed,Abd El Wahab Soha M.,El-Etr Wafaa M. T.,Zein El-Abdeen Hanaa A.
Abstract
AbstractLaFeO3/biochar composite is prepared by cellulose-modified microwave-assisted method at 450 °C. The structure is identified by Raman spectrum which, consists of characteristics biochar bands and octahedral perovskite chemical shifts. The morphology is examined by scanning electron microscope (SEM); two phases are observed, rough microporous biochar and orthorhombic perovskite particles. The BET surface area of the composite is 57.63 m2/g. The prepared composite is applied as a sorbent for the removal of Pb2+, Cd2+, and Cu2+ions from aqueous solutions and wastewater. The adsorption ability reaches a maximum at pH > 6 for Cd2+, and Cu2+ions, and is pH-independent for Pb2+ions adsorption. The adsorption follows pseudo 2nd order kinetic model, Langmuir isotherm for Pb2+ions, and Temkin isotherms for Cd2+, and Cu2+ions. The maximum adsorption capacities,qm, are 606, 391, and 112 mg/g for Pb2+, Cd2+, and Cu2+ions, respectively. The electrostatic interaction is responsible for the adsorption of Cd2+, and Cu2+ions on LaFeO3/biochar composite. In case of Pb2+ions form a complex with the surface functional groups of the adsorbate. LaFeO3/biochar composite shows high selectivity for the studied metal ions and excellent performance in real samples. The proposed sorbent can be easily regenerated and effectively reused.
Publisher
Springer Science and Business Media LLC
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献