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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: email

(This article belongs to the Special Issue: Porous Materials for Sustainable Development)

Journal of Renewable Materials 2023, 11(5), 2209-2232. https://doi.org/10.32604/jrm.2023.025241

Abstract

To address the serious pollution of heavy metals in AMD, the difficulty and the high cost of treatment, Fe3O4-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 Fe2+ to Fe3+ and water bath temperature on the removal of AMD by Fe3O4-L prepared by chemical co-precipitation method were analyzed. Static adsorption experiments were conducted on Cu2+, Zn2+ and Pb2+ using Fe3O4-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 Fe2+ to Fe3+ are larger. Obtained by response surface optimization analysis, the optimum conditions for the preparation of Fe3O4-L were a particle size of 250 mesh, a total Fe concentration of 0.5 mol/L, and a molar ratio of Fe2+ to Fe3+ of 1:2. Under these conditions, the removal rates of Cu2+, Zn2+, and Pb2+ were 94.52%, 88.49%, and 96.69% respectively. The adsorption of Cu2+, Zn2+ and Pb2+ by Fe3O4-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 Fe3O4-L for Cu2+ and Zn2+ is endothermic, while that for Pb2+ is exothermic. Fe3O4-L can still maintain a high adsorption capacity after five cycles of adsorption-desorption experiments. Cu2+, Zn2+ and Pb2+ mainly exist as CuFe2O4, Zn(OH)2, ZnFe2O4 and PbS after being adsorbed by Fe3O4-L, which is the result of the combination of physical diffusion, ion exchange and surface complexation reaction.

Graphical Abstract

Optimization of Preparation of Fe<sub>3</sub>O<sub>4</sub>-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions

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APA Style
Di, J., Sun, X., Zhang, S., Dong, Y., Yuan, B. (2023). Optimization of preparation of fe<sub>3</sub>o<sub>4</sub>-l by chemical co-precipitation and its adsorption of heavy metal ions. Journal of Renewable Materials, 11(5), 2209-2232. https://doi.org/10.32604/jrm.2023.025241
Vancouver Style
Di J, Sun X, Zhang S, Dong Y, Yuan B. Optimization of preparation of fe<sub>3</sub>o<sub>4</sub>-l by chemical co-precipitation and its adsorption of heavy metal ions. J Renew Mater. 2023;11(5):2209-2232 https://doi.org/10.32604/jrm.2023.025241
IEEE Style
J. Di, X. Sun, S. Zhang, Y. Dong, and B. Yuan "Optimization of Preparation of Fe<sub>3</sub>O<sub>4</sub>-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions," J. Renew. Mater., vol. 11, no. 5, pp. 2209-2232. 2023. https://doi.org/10.32604/jrm.2023.025241



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