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首页> 外文期刊>RSC Advances >Adsorption characteristics of metal–organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration
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Adsorption characteristics of metal–organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration

机译：金属有机骨架MIL-101（Cr）对磺胺甲恶唑的吸附特性及其过硫酸盐的氧化再生

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A metal–organic framework, MIL-101(Cr), was used to adsorb sulfamethoxazole (SMZ) in water and activated persulfate (PS) oxidation was investigated to regenerate SMZ-saturated MIL-101(Cr). Adsorption and oxidation were combined in this study. MIL-101(Cr) was characterized by SEM, BET, XPS and FT-IR analyses. Effects of various operating parameters on adsorption efficiency were studied. The dosages of persulfate for SMZ desorption and oxidation were investigated. The results showed that the recommended pH was 6–8 for SMZ adsorption and optimum MIL-101(Cr) dosage was 0.1 g L ~(?1) . SMZ adsorption by MIL-101(Cr) was a spontaneous process and nearly exothermic. Saturation adsorption capacity was achieved in 180 s and the adsorption followed the pseudo-second-order model. The maximum adsorption amount of MIL-101(Cr) to SMZ was 181.82 mg g ~(?1) (Langmuir). MIL-101(Cr) also showed good adsorption capacities for sulfachloropyridazine (SCP), sulfamonomethoxine (SMM), and sulfadimethoxine (SDM). Persulfate was helpful for SMZ desorption from the surface of saturated MIL-101(Cr) and sufficient persulfate could simultaneously oxidize the SMZ. XPS analysis showed that the structure of MIL-101(Cr) was stable after the persulfate oxidation process. Regenerated MIL-101(Cr) had the same level of adsorption capacity as fresh MIL-101(Cr). An adsorption–oxidation combined process may be set up based on the results. This study provides basic data for the deep treatment of organic micropollutants in urban water bodies.
机译：金属-有机骨架MIL-101（Cr）用于吸附水中的磺胺甲恶唑（SMZ），并研究了活化的过硫酸盐（PS）氧化来再生SMZ饱和的MIL-101（Cr）。在这项研究中结合了吸附和氧化。 MIL-101（Cr）通过SEM，BET，XPS和FT-IR分析表征。研究了各种操作参数对吸附效率的影响。研究了过硫酸盐对SMZ脱附和氧化的剂量。结果表明，SMZ吸附的推荐pH为6-8，MIL-101（Cr）的最佳添加量为0.1 g L〜（？1）。 MIL-101（Cr）对SMZ的吸附是一个自发过程，几乎是放热的。在180 s内达到饱和吸附容量，并且吸附遵循拟二级模型。 MIL-101（Cr）对SMZ的最大吸附量为181.82 mg g〜（？1）（Langmuir）。 MIL-101（Cr）还显示出对磺胺氯哒嗪（SCP），磺胺单甲恶碱（SMM）和磺胺二甲恶碱（SDM）的良好吸附能力。过硫酸盐有助于SMZ从饱和MIL-101（Cr）的表面脱附，足够的过硫酸盐可以同时氧化SMZ。 XPS分析表明，过硫酸盐氧化后，MIL-101（Cr）的结构稳定。再生的MIL-101（Cr）具有与新鲜MIL-101（Cr）相同的吸附能力。根据结果​​可以建立吸附-氧化联合过程。该研究为城市水体中有机微量污染物的深度处理提供了基础数据。

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