Insight into the adsorption behavior and mechanism of trace impurities from H2O2 solution on functionalized zirconia by tuning the structure of amino groups
Yu Meng , Yitong Wang , Guozhu Li , Guozhu Liu , Li Wang
Front. Chem. Sci. Eng. ›› 2024, Vol. 18 ›› Issue (5) : 56
Insight into the adsorption behavior and mechanism of trace impurities from H2O2 solution on functionalized zirconia by tuning the structure of amino groups
Primary, secondary and tertiary amino-functionalized zirconia (ZrO2−NH2, ZrO2−NH and ZrO2−N) was synthesized by the postgrafting method for the adsorption removal of typical metallic ions, phosphate and total oxidizable carbon from a real H2O2 solution. ZrO2−NH2, ZrO2−NH and ZrO2−N exhibited similar pore sizes and sequentially increased zeta potentials. The adsorption results of single and binary simulated solutions showed that the removal efficiency increased in the order of Fe3+ > Al3+ > Ca2+ > Na+. There is competitive adsorption between metallic ions, and Fe3+ has an advantage over the other metals, with a removal efficiency of 90.7%. The coexisting phosphate could promote the adsorption of metallic ions, while total oxidizable carbon had no effect on adsorption. The adsorption results of the real H2O2 solution showed that ZrO2−NH2 exhibited the best adsorption affinity for metallic ions, as did phosphate and total oxidizable carbon, with a total adsorption capacity of 120.9 mg·g–1. Density functional theory calculations revealed that the adsorption process of metallic ions involves electron transfer from N atoms to metals and the formation of N-metal bonds.
adsorption / metallic ion / phosphate / total oxidizable carbon / zirconia / H2O2
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Higher Education Press
Supplementary files
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