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首页> 外文期刊>Journal of Hazardous Materials >Enhancement of ionizing radiation-induced catalytic degradation of antibiotics using Fe/C nanomaterials derived from Fe-based MOFs
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Enhancement of ionizing radiation-induced catalytic degradation of antibiotics using Fe/C nanomaterials derived from Fe-based MOFs

机译：使用基于Fe的MOF的Fe / C纳米材料增强电离辐射诱导的抗生素催化降解

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摘要

In present work, we studied a novel Fe/C nanomaterial fabricated using Fe-based metal organic frameworks (MOFs) as precursors through thermal pyrolysis to catalyze gamma irradiation-induced degradation of antibiotics, cephalosporin C (CEP-C) and sulfamethazine (SMT) in aqueous solution. The MOFs-derived Fe/C nanomaterials (DMOFs) had the regular octahedrons structure of MOFs and contained element C, Fe and O, while Fe degrees with a fraction of Fe3O4 and Fe2O3 were identified. Results showed that DMOFs addition could accelerate the generation of OH during gamma irradiation, while the intermediates of bonds cleavages of antibiotic molecules and OH addition were identified. DMOFs were more effective to improve the decomposition of antibiotic having the higher adsorption capacity like SMT. The degradation rate of CEP-C and SMT increased by 1.3 times and 1.8 times, and TOC reduction at 1.0 kGy reached 42 % and 51 %, respectively by gamma/DMOFs treatment, while only 20.2 % (CEP-C) and 4.5 % (SMT) of TOC reduction were obtained by gamma-irradiation alone. The crystal structure, functional groups and magnetism of DMOFs changed slightly after gamma irradiation, which made it possible to be reused. DMOFs were promising to enhance the degradation of antibiotics during gamma irradiation.
机译：在目前的工作中，我们研究了一种以铁基金属有机骨架（MOFs）为前体通过热解作用催化催化伽马辐射诱导的抗生素，头孢菌素C（CEP-C）和磺胺二甲嘧啶（SMT）降解的新型Fe / C纳米材料。在水溶液中。来自MOF的Fe / C纳米材料（DMOF）具有MOF的规则八面体结构，并包含元素C，Fe和O，同时鉴定出Fe含量为Fe3O4和Fe2O3的一部分。结果表明，添加DMOFs可以加速γ射线辐照过程中OH的生成，同时鉴定了抗生素分子键裂解和OH添加的中间产物。 DMOF更有效地改善了SMT等具有较高吸附能力的抗生素的分解。通过γ/ DMOF处理，CEP-C和SMT的降解率分别提高了1.3倍和1.8倍，TOC在1.0 kGy下的降低分别达到42％和51％，而CEP-C和CMT分别仅为20.2％和4.5％（仅通过伽马射线辐照即可获得TOC降低的SMT。 γ射线辐照后，DMOF的晶体结构，官能团和磁性发生了轻微变化，从而可以重复使用。 DMOF有望在伽马射线照射期间增强抗生素的降解。

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  • 来源
    《Journal of Hazardous Materials》 |2020年第may5期|122148.1-122148.9|共9页
  • 作者

  • 作者单位

    China Univ Geosci Beijing Sch Water Resources & Environm Beijing 100083 Peoples R China;

    China Univ Geosci Beijing Sch Water Resources & Environm Beijing 100083 Peoples R China|Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol INET Beijing 100084 Peoples R China;

    Tsinghua Univ Collaborat Innovat Ctr Adv Nucl Energy Technol INET Beijing 100084 Peoples R China|Tsinghua Univ Beijing Key Lab Radioact Waste Treatment INET Beijing 100084 Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Ionizing radiation; MOFs; Antibiotics; Advanced oxidation; Wastewater treatment;

    机译：电离辐射;财政部;抗生素;高级氧化;废水处理;

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