FeOOH and FeOOH@ZnO were prepared by hydrothermal synthesis, and their structures and adsorption properties toward S2− were studied. The results showed that too high hydrothermal temperature was not conducive to the adsorption of S2−. However, using sodium dodecyl sulfate (SDS) for FeOOH preparation and adding nanometer ZnO (FeOOH@ZnO) could significantly improve the adsorption of S2− by FeOOH, and adsorption removal rate was close to 90.0% and adsorption amount was 87.5 mg·g−1. The structural analysis showed that the modification of FeOOH by SDS and the addition of nano-ZnO resulted in the reduction in size of the FeOOH particles, forming amorphous inclusion structure with ZnO present inside and FeOOH outside. The specific surface area of FeOOH@ZnO was found to be higher than that of FeOOH. Therefore, it is beneficial to the adsorption of S2−. XPS fitting results showed that ferrous deposits appeared in the process of adsorption of S2− by FeOOH@ZnO, and it was considered that the oxygen of Fe = O was replaced with sulfur.

中文翻译：

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水热法合成 FEOOH 和 FEOOH@ZNO 及 S2- 在废水中的吸附

采用水热合成法制备了FeOOH和FeOOH@ZnO，研究了它们的结构和对S2-的吸附性能。结果表明，过高的水热温度不利于S2-的吸附。然而，使用十二烷基硫酸钠（SDS）制备FeOOH并添加纳米ZnO（FeOOH@ZnO）可以显着提高FeOOH对S2-的吸附，吸附去除率接近90.0%，吸附量为87.5 mg·g- 1. 结构分析表明，SDS对FeOOH的改性和纳米ZnO的加入导致FeOOH颗粒尺寸减小，形成内ZnO外FeOOH的非晶包体结构。发现 FeOOH@ZnO 的比表面积高于 FeOOH。因此，有利于 S2- 的吸附。