To make full use of natural waste, a novel Mg-Al mixed oxide adsorbent was synthesized by the dip-calcination method using the fluff of the chinar tree (FCT) and an Mg(II) and Al(III) chloride solution as raw materials. The adsorbents were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared (FT-IR) spectroscopy, and X-ray photoelectron spectroscopy (XPS). The effects of the Mg/Al molar ratio and calcination temperature on the performance of the novel Mg-Al mixed oxide adsorbent were investigated. The optimized Mg-Al mixed oxide adsorbent had a Langmuir adsorption capacity of 53 mg/g. This adsorption capacity was higher than that of the separate Mg oxide and Al oxide. The synergy between Mg and Al is beneficial to the adsorption performance of the material. The fluoride adsorption capacity of the optimized Mg-Al mixed oxide adsorbent is only slightly affected by ions such as Cl⁻, NO₃⁻, SO₄²⁻, Na⁺, and K⁺ and is excellent for use in recycling and real water. The hydroxyl groups on the surface of the Mg-Al mixed oxide adsorbent play a key role in the adsorption of fluorine. The as-obtained novel Mg-Al mixed oxide adsorbent is an efficient and environmentally friendly agent for fluoride removal from drinking water.

中文翻译：

---

使用FCT模板合成的Mg-Al混合氧化物吸附剂，用于去除饮用水中的氟化物。

为了充分利用自然废物，以浸没树毛（FCT）和氯化镁（II）和氯化铝（III）为原料，通过浸渍煅烧法合成了新型镁铝混合氧化物吸附剂。 。通过X射线衍射（XRD），扫描电子显微镜（SEM），傅里叶变换红外（FT-IR）光谱和X射线光电子能谱（XPS）对吸附剂进行表征。研究了Mg / Al摩尔比和煅烧温度对新型Mg-Al混合氧化物吸附剂性能的影响。优化的Mg-Al混合氧化物吸附剂的Langmuir吸附容量为53 mg / g。该吸附能力高于单独的氧化镁和氧化铝的吸附能力。镁和铝之间的协​​同作用有利于材料的吸附性能。^-，NO ₃ ^-，SO ₄ ^2-，钠⁺，和K ⁺和是极好的在循环和实际水的使用。Mg-Al复合氧化物吸附剂表面的羟基在氟的吸附中起关键作用。所获得的新型Mg-Al混合氧化物吸附剂是一种高效，环保的饮用水中氟化物去除剂。