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Adsorption characteristics of metal-organic framework MIL-101(Cr) towards sulfamethoxazole and its persulfate oxidation regeneration

机译：金属 - 有机框架MIL-101（CR）对磺胺甲恶唑的吸附特性及其过硫酸盐氧化再生

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摘要

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：金属有机框架Mil-101（Cr）用于在水中吸附磺胺甲恶唑（SMZ），并研究了活化的过硫酸盐（PS）氧化以再生SMZ饱和MIL-101（Cr）。在本研究中合并吸附和氧化。 MIL-101（CR）的特点是SEM，BET，XPS和FT-IR分析。研究了各种操作参数对吸附效率的影响。研究了SMZ解吸和氧化的过硫酸盐的剂量。结果表明，SMZ吸附的推荐pH为6-8，最佳MIL-101（CR）剂量为0.1g L-1。 MIL-101（CR）的SMZ吸附是一种自发过程，几乎放热。在180秒和吸附后达到饱和度吸附容量，然后遵循伪二阶模型。 MIL-101（CR）至SMZ的最大吸附量为181.82mg（1）（Langmuir）。 MIL-101（CR）还为磺氯哌啶（SCP），磺胺列甲酰胺（SMM）和磺酰嘧啶（SDM）显示出良好的吸附能力。过硫酸盐对从饱和MIL-101（Cr）表面的SMZ解吸有助于SMZ解吸，并且足够的过硫酸盐可以同时氧化SMZ。 XPS分析表明，过硫酸盐氧化过程后MIL-101（Cr）的结构稳定。再生MIL-101（CR）具有与新MIL-101（CR）的吸附容量相同。可以基于结果建立吸附 - 氧化组合过程。本研究提供了城市水体中有机微污染物深处的基本数据。

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  • 来源
    《RSC Advances》 |2018年第49期|共8页
  • 作者

    Huang Xiaoli; Hu Qi; Gao Lei; Hao Qirui; Wang Peng; Qin Dongli;

  • 作者单位

    Chinese Acad Fishery Sci Heilongjiang River Fisheries Res Inst Harbin 150070 Heilongjiang Peoples R China;

    Shenyang Pharmaceut Univ Sch Pharmaceut Engn Shenyang 110016 Liaoning Peoples R China;

    Chinese Acad Fishery Sci Heilongjiang River Fisheries Res Inst Harbin 150070 Heilongjiang Peoples R China;

    Chinese Acad Fishery Sci Heilongjiang River Fisheries Res Inst Harbin 150070 Heilongjiang Peoples R China;

    Chinese Acad Fishery Sci Heilongjiang River Fisheries Res Inst Harbin 150070 Heilongjiang Peoples R China;

    Chinese Acad Fishery Sci Heilongjiang River Fisheries Res Inst Harbin 150070 Heilongjiang Peoples R China;

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  • 正文语种 eng
  • 中图分类 化学;
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