文章摘要
陈 苗, 胡春华, 郭昌胜, 吴代赦, 徐 建.磁性Fe3O4纳米颗粒的制备及其催化降解水中磺胺甲恶唑研究Journal of Water Resources and Water Engineering[J].,2018,29(5):46-52
磁性Fe3O4纳米颗粒的制备及其催化降解水中磺胺甲恶唑研究
Synthesis of Fe3O4 magnetic nanoparticles and its application in catalytic degradation of sulfamethoxazole in water
  
DOI:10.11705/j.issn.1672-643X.2018.05.08
中文关键词: 磁性Fe3O4纳米颗粒  磁性材料  磺胺甲恶唑  降解机制  水处理
英文关键词: magnetic nano-Fe3O4  magnetic material  sulfamethoxazole  degradation mechanism  water treatment
基金项目:国家自然科学基金项目( 51208482)
Author NameAffiliation
CHEN Miao1,2, HU Chunhua1, GUO Changsheng2, WU Daishe1, XU Jian2 (1.南昌大学 资源环境与化工学院鄱阳湖环境与资源利用教育部重点实验室 江西 南昌 330031 2.中国环境科学研究院 环境基准与风险评估国家重点实验室 北京 100012) 
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中文摘要:
      旨在构建一种高效绿色的去除水环境中磺胺甲恶唑(SMZ)的方法。采用溶剂热法制备了Fe3O4磁性纳米颗粒,并利用XRD、磁滞回线、SEM及TEM对Fe3O4颗粒进行了物相和形貌的表征。研究了SMZ在纳米Fe3O4和H2O2构成的非均相Fenton体系中的催化氧化特征,并考察了pH值、H2O2初始浓度及催化剂用量对SMZ催化氧化的影响。结果表明:制备的Fe3O4纳米颗粒呈微球形,具有很强的顺磁性,平均粒径约250 nm,能够有效地活化H2O2产生·OH并高效降解SMZ。在25 ℃,pH=3,Fe3O4用量为1.0 g/L,H2O2浓度为5.0 μL/mL时,所建立Fe3O4-H2O2氧化体系能在5 min内几乎完全降解20 mg/L的SMZ。循环实验表明,所制备的Fe3O4磁性纳米颗粒具有较好的稳定性。该实验结论可为水体中SMZ的去除提供一定的理论参考。
英文摘要:
      This paper aims to establish a efficient and green method to remove sulfamethoxazole (SMZ) in water environment. The Fe3O4 magnetic nanoparticles were synthesized via a solvothermal method, and the structure and morphology of the prepared materials were characterized by a series of techniques including XRD, magnetic performance testing, SEM and TEM. The catalytic oxidation characteristics of SMZ in the heterogeneous Fenton system of Fe3O4-H2O2, as well as the influences of the variables such as pH value, H2O2 concentration and catalyst dosage on the degradation processes were investigated. The results showed that the prepared Fe3O4 nanoparticles were microspherical with an average particle size of about 250 nm, it has strong paramagnetism and could effectively activate H2O2 to produce ·OH, which could degrade SMZ efficiently. In the Fe3O4-H2O2 oxidation system, 20 mg/L of SMZ was almost completely degraded within 5 min under the condition of pH at 3, and a Fe3O4 dosage of 1.0 g/L and a H2O2 dosage of 5.0 μL/mL at 25 ℃. The cycle experiments showed that the synthesized samples possessed the excellent stability. The experimental results in this study could provide some theoretical references for SMX removal in the aqueous environment.
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