工业水处理 ›› 2023, Vol. 43 ›› Issue (9): 110-118. doi: 10.19965/j.cnki.iwt.2022-1039

• 试验研究 • 上一篇    下一篇

磁性催化剂制备及其在臭氧催化氧化+磁分离工艺中的研究

于金旗1,2,3(), 孙磊1,2,3, 黄光华1,2, 田彩星1,2, 张鹤清1,2,3(), 佟庆远1   

  1. 1. 中建环能科技股份有限公司,四川 成都 610045
    2. 中国建筑生态环境工程研究中心(水环境技术与装备),北京 100037
    3. 中建环能(北京)环保有限公司,北京 100043
  • 收稿日期:2023-07-01 出版日期:2023-09-20 发布日期:2023-09-25
  • 作者简介:

    于金旗(1988— ),硕士研究生,高级工程师。电话:18519734377,E-mail:

    张鹤清,博士,教授级高级工程师。E-mail:

  • 基金资助:
    住建部研究开发项目(2021-K-129); 中国建筑股份有限公司科技研发计划(CSCEC-2021-Z-52); 北京市科协金桥工程种子资金资助项目(ZZ22003)

Preparation of magnetic catalyst and its application in ozone catalytic oxidation combined with magnetic separation process

Jinqi YU1,2,3(), Lei SUN1,2,3, Guanghua HUANG1,2, Caixing TIAN1,2, Heqing ZHANG1,2,3(), Qingyuan TONG1   

  1. 1. CSCEC SCIMEE Sci. & Tech. Co. ,Ltd. ,Chengdu 610045,China
    2. CSCEC Eco-Engineering Research Center(Water Environment Technology and Equipment),Beijing 100037,China
    3. CSCEC SCIMEE (Beijing) Environmental Protection Co. ,Ltd. ,Beijing 100043,China
  • Received:2023-07-01 Online:2023-09-20 Published:2023-09-25

摘要:

以粉末活性炭(PAC)为载体,通过改进一种简易、可大批量生产的方法,制备出新型磁性催化剂(Y x Fe3- x O4/PAC)。采用SEM、XRD、BET、FT-IR、VSM等表征方法对新制备的磁性催化剂进行分析,结果显示,该类磁性催化剂具有微小颗粒状、质量轻、负载过渡金属元素均匀、比表面积大(624.33 m2/g)、介孔结构(平均孔径为3.20 nm)、富含表面羟基基团以及超顺磁性易于磁回收(饱和磁化强度为13.26 emu/g)等特点。通过研究臭氧催化氧化结合磁分离工艺去除亚甲基蓝(MB)效果实验发现,当x=0.3时,磁性催化剂(Y0.3Fe2.7O4/PAC)具有最佳的吸附、催化氧化效果,且重复性和稳定性好;当重复使用5次后,其MB吸附去除率稳定在37.9%,催化氧化去除速率约是单独臭氧氧化的1.7倍;同时,当外加磁场强度大于0.2 T时,磁性催化剂回收率可大于98%,利用超磁分离设备即可将其回收。

关键词: 磁性催化剂, 流化床反应器, 臭氧催化氧化, 磁分离

Abstract:

In this paper,a new type of magnetic catalyst(Y x Fe3- x O4/PAC) was prepared by improving a simple and mass production method based on PAC. SEM,XRD,BET,FT-IR,VSM and other characterization methods were used to analyze the newly prepared magnetic catalyst. The results showed that the magnetic catalyst had the characteristics of small,granular,light weight,uniform load of transition metal elements,large specific surface area(624.33 m2/g),mesoporous structure(average pore size 3.20 nm),rich in surface hydroxyl groups,and easy magnetic recovery(saturation magnetization 13.26 emu/g).By investigating the removal effect of MB by ozone catalytic oxidation combined with magnetic separation process,it was found that when x=0.3,the magnetic catalyst(Y0.3Fe2.7O4/PAC) had the best adsorption and catalytic oxidation effect,and had good repeatability and stability. When the magnetic catalyst was repeated for 5 times,the MB adsorption removal rate was stable at 37.9%,and the catalytic oxidation removal rate was about 1.7 times that of ozonation alone. At the same time,when the applied magnetic field strength was greater than 0.2 T,the recovery rate of the magnetic catalyst could be more than 98%,which could be recovered by using the super-magnetic separation equipment.

Key words: magnetic catalyst, fluidized bed reactor, ozone catalytic oxidation, magnetic separation

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