In this study, nanoscale zero-valent iron (NZVI) modified by ethylene glycol (EG), and then an aluminum hydroxide (Al(OH)3) film was wound on it to make a new material (EG-NZVI@Al(OH)3), it is used to remove sulfides in water and it has greatly improved the performance of sulfide removal. At different pH values, Al(OH)3 film can effectively improve the adsorption of sulfide by EG-NZVI @Al(OH)3. Al(OH)3 film can also enhance suspension stability and reduce NZVI corrosion in water. The scanning electron microscopy (SEM), transmission electron microscopy (TEM), X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) characterization methods were used to prove that the NZVI was successfully modified by EG and coated by Al(OH)3, achieved the role of protecting NZVI from being oxidized during preparation and drying, and enhanced suspension stability, chemical reactivity and longevity. The removal of sulfides in water by NZVI is mainly through the formation of surface complexes, iron mercapto oxide (FeOSH) and the precipitates of iron sulfide (FeS, FeS2, FeSn) adsorbed on the surface of NZVI. Al(OH)3 film is positively charged It will cause electrostatic adsorption and adsorption on sulfur ions. EG-NZVI@Al(OH)3 is used to remove sulfide from 2.5-50 mg/L aqueous solution. It shows the highest adsorption capacity is 175.5 mg/g. And the mechanism of adsorption is speculated.

中文翻译：

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通过乙二醇改性和Al（OH）3涂层NZVI制备新材料，以去除水中的硫化物。

在这项研究中，先用乙二醇（EG）修饰纳米级零价铁（NZVI），然后将氢氧化铝（Al（OH）3）膜缠绕在其上，制成新材料（EG-NZVI @ Al（OH） ）3），用于去除水中的硫化物，大大提高了硫化物的去除性能。在不同的pH值下，Al（OH）3薄膜可以有效地改善EG-NZVI @ Al（OH）3对硫化物的吸附。Al（OH）3膜还可以增强悬浮液稳定性并减少水中的NZVI腐蚀。使用扫描电子显微镜（SEM），透射电子显微镜（TEM），X射线衍射（XRD），傅里叶变换红外光谱（FT-IR）和X射线光电子光谱（XPS）表征方法来证明NZVI被EG成功修饰并被Al（OH）3包覆，发挥了保护NZVI在制备和干燥过程中不被氧化的作用，并增强了悬浮液的稳定性，化学反应性和寿命。NZVI去除水中的硫化物主要是通过形成表面配合物，巯基氧化铁（FeOSH）和吸附在NZVI表面的硫化铁沉淀（FeS，FeS2，FeSn）来实现的。Al（OH）3膜带正电，会引起静电吸附和硫离子吸附。EG-NZVI @ Al（OH）3用于去除2.5-50 mg / L水溶液中的硫化物。它显示出最高的吸附容量为175.5 mg / g。并推测了吸附机理。巯基氧化铁（FeOSH）和硫化铁的沉淀物（FeS，FeS2，FeSn）吸附在NZVI表面上。Al（OH）3膜带正电，会引起静电吸附和硫离子吸附。EG-NZVI @ Al（OH）3用于去除2.5-50 mg / L水溶液中的硫化物。它显示出最高的吸附容量为175.5 mg / g。并推测了吸附机理。巯基氧化铁（FeOSH）和硫化铁的沉淀物（FeS，FeS2，FeSn）吸附在NZVI表面上。Al（OH）3膜带正电，会引起静电吸附和硫离子吸附。EG-NZVI @ Al（OH）3用于去除2.5-50 mg / L水溶液中的硫化物。它显示出最高的吸附容量为175.5 mg / g。并推测了吸附机理。