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硅藻土负载MnFe2O4纳米颗粒活化PMS降解金橙Ⅱ

张理军,  严群,  周子琳,  陈燕,  陈锦富

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文章导航 > 环境工程  > 2022 >  40(11): 61-68
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引用本文: 张理军, 严群, 周子琳, 陈燕, 陈锦富. 硅藻土负载MnFe2O4纳米颗粒活化PMS降解金橙Ⅱ[J]. 环境工程, 2022, 40(11): 61-68. doi: 10.13205/j.hjgc.202211009
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ZHANG Lijun, YAN Qun, ZHOU Zilin, CHEN Yan, CHEN Jinfu. NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 61-68. doi: 10.13205/j.hjgc.202211009
Citation: ZHANG Lijun, YAN Qun, ZHOU Zilin, CHEN Yan, CHEN Jinfu. NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS[J]. ENVIRONMENTAL ENGINEERING , 2022, 40(11): 61-68. doi: 10.13205/j.hjgc.202211009
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硅藻土负载MnFe2O4纳米颗粒活化PMS降解金橙Ⅱ

doi: 10.13205/j.hjgc.202211009

  • 1. 江西理工大学 资源与环境工程学院, 江西 赣州 341000;

  • 2. 江西理工大学 土木与测绘工程学院, 江西 赣州 341000;

  • 3. 江西理工大学 赣江流域水质安全保障工程技术研究中心, 江西 赣州 341000

详细信息
    作者简介:

    张理军(1997-),男,硕士,主要研究方向为水污染控制理论与污水资源化利用。995758417@qq.com

    通讯作者:

    严群(1973-),女,博士,副教授,主要研究方向为水污染控制理论与资源化。1068630@qq.com

NANOPARTICLES SUPPORTED BY DIATOMITE FOR REMOVAL OF ORANGE Ⅱ THROUGH ACTIVATING PMS

  • 1. School of Resources and Environmental Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;

  • 2. School of Civil and Surveying&Mapping Engineering, Jiangxi University of Science and Technology, Ganzhou 341000, China;

  • 3. Research Center for Water Quality Security Technology at Ganjiang River Basin, Jiangxi University of Science and Technology, Ganzhou 341000, China

摘要

    摘要
  • 摘要: 采用溶胶-凝胶法制备硅藻土/MnFe2O4复合型催化剂（DMF），以金橙Ⅱ为目标污染物，分析DMF活化过一硫酸盐（PMS）的性能和作用机制。结果表明：1） MnFe2O4颗粒均匀负载于硅藻土上，使DMF具有更好的分散性和活化性；2） DMF对PMS的活化能力优于单一MnFe2O4，DMF （1：1）/PMS体系降解金橙Ⅱ符合准一级动力学模型，且降解速率是MnFe2O4/PMS体系的2.16倍，0.5 g/L DMF和0.5 mmol/L PMS在40 min内对50 mg/L金橙Ⅱ降解率达到93.1%；3）反应体系中存在·OH、SO4-·、1O2、·O2- 4种活性物种，其中·OH和SO4-·起主导作用；4） DMF复合材料具有更好的结构稳定性，金属离子溶出量远低于MnFe2O4。研究结果可为新型高效PMS催化剂在处理工业废水的实际应用提供参考。
    Abstract: Diatomite/MnFe2O4 composite catalyst (DMF) was rationally synthesized by sol-gel method. The performance and reaction mechanism of DMF activated peroxymonosulfate (PMS) were degraded with orange Ⅱ as the target pollutant. The results showed that:1) MnFe2O4 particles were uniformly loaded on diatomite and DMF had better dispersion and stability; 2) DMF had a better catalytic activity to PMS than MnFe2O4 so that the degradation rate of DMF/PMS system for orange Ⅱ removal was 2.16 times that of MnFe2O4 system, the reaction process could be fitted by the pseudo-first-order kinetic pattern. A degradation rate of 93.1% could be achieved within 40 min for 50 mg/L AO2 by 0.5 g/L DMF and 0.5 mmol/L PMS; 3) there were four active radicals ·OH、SO4-·、1O2 and ·O2- in the reaction system, and OH and SO4- play the main role; 4) DMF had better structural stability and its metal ion dissolution was much lower than MnFe2O4. This study paved a way for the practical application of the new PMS activators in industrial wastewater treatment.
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    • 参考文献(29)
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