摘要：Shells are waste in the aquaculture industry. Due to its rich natural porous surface and biological activity, it has good adsorption. Shells can effec-tively reduce the content of various pollutants in wa-ter. In this paper, the oyster shell powder was modi-fied with Fe;O4, and the microstructure before and after modification was analyzed by SEM. The results show that the shell powder modified with Fe;O4im-proves the porosity. Through the adsorption kinetics and thermodynamics study, it is found that the ab-sorption of nitrogen and phosphorus by Fe;O. mod-ified shell powder conforms to the quasi-first-order kinetic model and Freundlich model.Optimization of parameters were carried out. The nitrogen adsorp-tion capacity of Fe3O4 modified shell powder reached 126.01 mg/g, while the phosphorus adsorp-tion capacity also reached 85.34 mg/g, which is su-perior to the unmodified oyster shell powder.
