首页|Insight into the adsorption behavior and mechanism of trace impurities from H2O2 solution on functionalized zirconia by tuning the structure of amino groups
Insight into the adsorption behavior and mechanism of trace impurities from H2O2 solution on functionalized zirconia by tuning the structure of amino groups
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Primary,secondary and tertiary amino-functio-nalized 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.
Key Laboratory for Green Chemical Technology of Ministry Education,School of Chemical Engineering and Technology,Tianjin University,Tianjin 300072,China
Haihe Laboratory of Sustainable Chemical Transformations,Tianjin 300192,China
State Key Laboratory of Safety and Control for Chemicals
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