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Preparation of Iron-Pillared Bentonite/Oyster Shell Composite and Phosphate Adsorption in Water

Zhijian Zhou1, Jie Yan1,*, Xinxiang Du1, Qiulin Xu1, Zijun Wu2, Jinlan Yang3, Xitong Fang1, Qiuling Zhong2, Qiaoguang Li1,*

1 College of Chemistry and Chemical Engineering, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
2 College of Light Industry and Food Science, Zhongkai University of Agriculture and Engineering, Guangzhou, 510225, China
3 Building Energy Efficiency Research Institute, Guangdong Provincial Academy of Building Research Group Co, Ltd., Guangzhou, 510500, China

* Corresponding Authors: Jie Yan. Email: email; Qiaoguang Li. Email: email

Journal of Renewable Materials 2023, 11(9), 3501-3515. https://doi.org/10.32604/jrm.2023.027852

Abstract

Iron-pillared bentonite (FB) was prepared by Fe(III) modified bentonite, and then the composites (FB-OS) were prepared by iron-pillared bentonite and oyster shell powder. The composites were characterized by FTIR, SEM, TGA, and EDS, and the phosphorus removal test was carried out. The results showed that FB-OS contained a large amount of CaO. Its structure was compact, but there were gaps in it. The maximum bending stress and compressive strength were 43.7 N and 0.927 MPa, respectively. The phosphorus removal test showed that the phosphorus removal rate of FB-OS was more than 90%, and measured the maximum adsorption capacity was 48.31 mg/g. A large amount of spherical products were produced on the surface and inside of FB-OS after phosphorus removal, it was speculated that spherical products were amorphous calcium phosphate in the paper. Analysis indicated that there was chemical adsorption during phosphorus removal. The kinetic equation of phosphorus adsorption by FB-OS was (R2 = 0.995). The adsorption rate was mainly controlled by outer film diffusion and intraparticle diffusion.

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Preparation of Iron-Pillared Bentonite/Oyster Shell Composite and Phosphate Adsorption in Water

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APA Style
Zhou, Z., Yan, J., Du, X., Xu, Q., Wu, Z. et al. (2023). Preparation of iron-pillared bentonite/oyster shell composite and phosphate adsorption in water. Journal of Renewable Materials, 11(9), 3501-3515. https://doi.org/10.32604/jrm.2023.027852
Vancouver Style
Zhou Z, Yan J, Du X, Xu Q, Wu Z, Yang J, et al. Preparation of iron-pillared bentonite/oyster shell composite and phosphate adsorption in water. J Renew Mater. 2023;11(9):3501-3515 https://doi.org/10.32604/jrm.2023.027852
IEEE Style
Z. Zhou et al., "Preparation of Iron-Pillared Bentonite/Oyster Shell Composite and Phosphate Adsorption in Water," J. Renew. Mater., vol. 11, no. 9, pp. 3501-3515. 2023. https://doi.org/10.32604/jrm.2023.027852



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