Abstract In this paper, diatomite/nano titanium dioxide composite (DNTD) was used as adsorbent to remove iodate from aqueous solution under different conditions. The maximum distribution coefficient could be up to 370 mL g −1 in acidic environment. The sorption speed is very fast and satisfies the pseudo-second-order equation. The sorption isotherm is well described by the Freundlich model. The sorption process is spontaneous and exothermic. Iodate was adsorbed by the silicon hydroxyl group of DNTD according to the characterization results. DNTD is a promising material for the treatment of iodine pollution in the environment. Graphic abstract The diatomite/nano TiO 2 composite has a complex pore structure. It adsorbs iodate quickly and efficiently. Iodate is adsorbed by the Si–OH group and reduced under the catalysis of nano TiO 2 . It has great potential in the treatment of iodine pollution.

中文翻译：

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以硅藻土/纳米二氧化钛复合材料为吸附剂去除水溶液中的碘酸盐

摘要 本文以硅藻土/纳米二氧化钛复合材料（DNTD）为吸附剂，在不同条件下去除水溶液中的碘酸盐。在酸性环境中最大分配系数可达370 mL g -1 。吸附速度很快，满足伪二阶方程。Freundlich 模型很好地描述了吸附等温线。吸附过程是自发的和放热的。根据表征结果，碘酸盐被DNTD的硅羟基吸附。DNTD是一种很有前景的环境碘污染处理材料。图形摘要 硅藻土/纳米TiO 2 复合材料具有复杂的孔结构。它可以快速有效地吸附碘酸盐。碘酸盐被Si-OH基团吸附并在纳米TiO 2 的催化下被还原。