Open Access
ARTICLE
Optimization of Preparation of Fe3O4-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions
Junzhen Di, Xueying Sun*, Siyi Zhang, Yanrong Dong, Bofu Yuan
College of Civil Engineering, Liaoning Technical University, Fuxin, 123000, China
* Corresponding Author: Xueying Sun. Email:
(This article belongs to this Special Issue: Porous Materials for Sustainable Development)
Journal of Renewable Materials 2023, 11(5), 2209-2232. https://doi.org/10.32604/jrm.2023.025241
Received 30 June 2022; Accepted 16 August 2022; Issue published 13 February 2023
Abstract
To address the serious pollution of heavy metals in AMD, the difficulty and the high cost of treatment, Fe
3O
4-L was prepared by the chemical co-precipitation method. Based on the single-factor and RSM, the effects of particle size, total Fe concentration, the molar ratio of Fe
2+ to Fe
3+ and water bath temperature on the removal of AMD by Fe
3O
4-L prepared by chemical co-precipitation method were analyzed. Static adsorption experiments were conducted on Cu
2+, Zn
2+ and Pb
2+ using Fe
3O
4-L prepared under optimal conditions as adsorbents. The adsorption properties and mechanisms were analyzed by combining SEM-EDS, XRD and FTIR for characterization. The study showed that the effects of particle size, total Fe concentration and the molar ratio of Fe
2+ to Fe
3+ are larger. Obtained by response surface optimization analysis, the optimum conditions for the preparation of Fe
3O
4-L were a particle size of 250 mesh, a total Fe concentration of 0.5 mol/L, and a molar ratio of Fe
2+ to Fe
3+ of 1:2. Under these conditions, the removal rates of Cu
2+, Zn
2+, and Pb
2+ were 94.52%, 88.49%, and 96.69% respectively. The adsorption of Cu
2+, Zn
2+ and Pb
2+ by Fe
3O
4-L prepared under optimal conditions reached equilibrium at 180 min, with removal rates of 99.99%, 85.27%, and 97.48%, respectively. The adsorption reaction of Fe
3O
4-L for Cu
2+ and Zn
2+ is endothermic, while that for Pb
2+ is exothermic. Fe
3O
4-L can still maintain a high adsorption capacity after five cycles of adsorption-desorption experiments. Cu
2+, Zn
2+ and Pb
2+ mainly exist as CuFe
2O
4, Zn(OH)
2, ZnFe
2O
4 and PbS after being adsorbed by Fe
3O
4-L, which is the result of the combination of physical diffusion, ion exchange and surface complexation reaction.
Graphical Abstract
Keywords
Cite This Article
Di, J., Sun, X., Zhang, S., Dong, Y., Yuan, B. (2023). Optimization of Preparation of Fe
3O
4-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions.
Journal of Renewable Materials, 11(5), 2209–2232.