Abstract With Miyi diatomite as the carrier and ferric nitrate as the modification agent, nano-micron vanadium adsorbent was prepared in the study. Then the adsorption properties of the prepared adsorbent were characterized by XRD, XRF, SEM, and ICP-OES analysis. The effects of adsorption time, initial pH value and initial vanadium concentration on VO3− adsorption performance were studied and the adsorption mechanism was discussed. The adsorption of VO3− on Miyi diatomite was significantly improved by the modification with ferric nitrate. The adsorption process of VO3− on nano-micron vanadium adsorbent was in accordance with Langmuir isothermal equation and quasi-second-order kinetic model. The saturated adsorption capacity was 43.38 mg/g. The adsorption capacity was higher in the weak acid environment and peaked at pH = 4.

中文翻译：

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用于VO3−吸附的纳米级钒吸附剂的制备

摘要 本研究以米易硅藻土为载体，硝酸铁为改性剂，制备了纳米级钒吸附剂。然后通过XRD、XRF、SEM和ICP-OES分析表征制备的吸附剂的吸附性能。研究了吸附时间、初始pH值和初始钒浓度对VO3−吸附性能的影响，讨论了吸附机理。硝酸铁修饰显着提高了米易硅藻土对VO3−的吸附。VO3−在纳米钒吸附剂上的吸附过程符合Langmuir等温方程和准二级动力学模型。饱和吸附容量为43.38mg/g。在弱酸性环境中吸附容量较高，在 pH=4 时达到峰值。