@Article{jrm.2023.027852,
AUTHOR = {Zhijian Zhou, Jie Yan, Xinxiang Du, Qiulin Xu, Zijun Wu, Jinlan Yang, Xitong Fang, Qiuling Zhong, Qiaoguang Li},
TITLE = {Preparation of Iron-Pillared Bentonite/Oyster Shell Composite and Phosphate Adsorption in Water},
JOURNAL = {Journal of Renewable Materials},
VOLUME = {11},
YEAR = {2023},
NUMBER = {9},
PAGES = {3501--3515},
URL = {http://www.techscience.com/jrm/v11n9/53584},
ISSN = {2164-6341},
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 <img src="https://www.techscience.com/files/jrm/image/qt.png" width="100px"> (R<sup>2</sup> = 0.995). The adsorption rate was mainly controlled
by outer film diffusion and intraparticle diffusion.},
DOI = {10.32604/jrm.2023.027852}
}