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掺镍 ZnFe2O4 复合材料的制备及其除藻性能

邓冬祝 李铃 曹传麒 廖丹伶 莫创荣 李雪棠

邓冬祝, 李铃, 曹传麒, 等. 掺镍 ZnFe2O4 复合材料的制备及其除藻性能[J]. 复合材料学报, 2023, 42(0): 1-10.
引用本文: 邓冬祝, 李铃, 曹传麒, 等. 掺镍 ZnFe2O4 复合材料的制备及其除藻性能[J]. 复合材料学报, 2023, 42(0): 1-10.
DENG Dongzhu, LI Ling, CAO Chuanqi, et al. Preparation of nickel-doped ZnFe2O4 composites and their algal removal properties[J]. Acta Materiae Compositae Sinica.
Citation: DENG Dongzhu, LI Ling, CAO Chuanqi, et al. Preparation of nickel-doped ZnFe2O4 composites and their algal removal properties[J]. Acta Materiae Compositae Sinica.

掺镍 ZnFe2O4 复合材料的制备及其除藻性能

基金项目: 国家自然科学基金 (基金号:22065003)
详细信息
    通讯作者:

    莫创荣,博士,副教授,硕士生导师,研究方向为高级氧化 E-mail: mochuangrong@163.com

  • 中图分类号: X524;TB332

Preparation of nickel-doped ZnFe2O4 composites and their algal removal properties

Funds: National Natural Science Foundation of China (No.22065003)
  • 摘要: 水体富营养化导致的有害藻华(HABs)爆发日益严重,对水环境和人类健康构成了巨大的威胁。本文采用简单的水热法制备了磁性可回收的镍掺杂 ZnFe2O4(Ni-ZFO)吸附剂,用于去除水体中的铜绿微囊藻。通过 SEM、XRD、EDS、XPS 和 VSM 对材料进行了表征。在 30 分钟内,Ni-ZFO 复合材料的藻细胞去除率最高可达 99.09%,在 25℃、pH= 3-8 的条件下,去除率保持在 90.41% 以上。此外,Ni-ZFO的饱和磁化强度为67.93 emu/g,比ZnFe2O4(ZFO)高10.74 emu/g,便于回收利用。吸附过程中藻胆蛋白含量并未增加,藻细胞在吸附过程中不会破裂,这就避免了藻毒素进入水环境而造成的二次污染。经过4次循环使用后除藻率仍保持在75%以上。本文合成的 Ni-ZFO 吸附剂对藻细胞具有较强的去除效率,且不会造成二次污染,在缓解水体富营养化的实际应用中显示出巨大的潜力,同时也充实了改性ZFO在吸附领域的应用。

     

  • 图  1  (a-b) ZFO 的扫描电镜图; (c-d) Ni-ZFO 的扫描电镜图; (e-h) 元素(O、Fe、Ni、Zn)的 EDS 图谱

    Figure  1.  (a-b) The SEM plot of the ZFO; (c-d) The SEM plot of the Ni-ZFO; (e-h) EDS patterns of elements (O, Fe, Ni, Zn)

    图  2  ZFO、Ni-ZFO 的 XRD 图谱

    Figure  2.  XRD patterns of ZFO, Ni-ZFO

    图  3  Ni-ZFO 使用前后的傅立叶变换红外光谱图

    Figure  3.  FTIR profiles of Ni-ZFO before and after use

    图  4  Ni-ZFO 的XPS 光谱: (a) survey; (b) C 1 s; (c) O 1 s; (d) Fe 2p; (e) Ni 2p; (f) Zn 2p。

    Figure  4.  The XPS spectra of survey(a), C 1 s(b), O 1 s(c), Fe 2p(d), Ni 2p(e), Zn 2p (f) for Ni-ZFO

    图  5  ZFO、Ni-ZFO 的磁滞回归线

    Figure  5.  Hysteresis regression line of ZFO, Ni-ZFO

    图  6  Ni-ZFO (a)、ZFO (b)的氮吸附-解吸和孔径分布

    Figure  6.  Nitrogen adsorption-desorption and pore size distribution of Ni-ZFO (a), ZFO (b)

    图  7  (a) Ni-ZFO 、ZFO除藻率对比图;(b) Ni-ZFO 吸附剂用量对除藻率的影响;(c) pH 对Ni-ZFO除藻率的影响;(d) 藻密度对Ni-ZFO除藻率的影响;(e) 温度对Ni-ZFO除藻率的影响;(f) 转速对Ni-ZFO除藻率的影响

    Figure  7.  (a) Comparison of algal removal rates of Ni-ZFO and ZFO; (b) Effect of Ni-ZFO adsorbent dosage on algae removal rate; (c) Effect of pH on the Algae Removal Rate of Ni-ZFO; (d) Effect of Algae Density on the Algae Removal Rate of Ni-ZFO; (e) Effect of Temperature on the Algae Removal Rate of Ni-ZFO; (f) Effect of Speed on the Algae Removal Rate of Ni-ZFO

    图  8  除藻过程中藻细胞溶液的 OD620

    Figure  8.  OD620 of algal cell solution during algal removal

    图  9  Ni-ZFO吸附后藻絮体液态扫描电镜观察

    Figure  9.  Scanning electron microscope observation of the liquid state of algal flocs after Ni-ZFO adsorption

    图  10  (a)Ni-ZFO的阴离子干扰实验;(b)Ni-ZFO的循环实验

    Figure  10.  (a)Anion interference experiment of Ni-ZFO; (b)Cycle experiment of Ni-ZFO

    图  11  Ni-ZFO的Zeta电位图

    Figure  11.  Zeta potential diagram of Ni-ZFO

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  • 收稿日期:  2023-10-30
  • 修回日期:  2023-11-27
  • 录用日期:  2023-12-01
  • 网络出版日期:  2023-12-25

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