1. Layered MgAlFe hydrotalcite-like compounds for effectively degrading Malachite Green via Fenton oxidation.
- Author
-
Guo, Xiaojun, Zhang, Tong, Xu, Yanan, Jiang, Pinpin, Wang, Kebai, Zha, Fei, Tang, Xiaohua, and Tian, Haifeng
- Subjects
MALACHITE green ,WASTEWATER treatment ,IRON ,HETEROGENEOUS catalysts ,X-ray diffraction - Abstract
The development of heterogeneous Fenton catalysts with good performance and stability is a challenge in the field of wastewater treatment. In this work, MgAlFe hydrotalcite-like compounds (MgAlFe-HTLcs) were prepared by solid phase reaction at room temperature and modified via a hydrothermal process. The experimental results showed that MgAlFe-HTLcs had a good layered structure with the same proportion of iron and aluminium, 18 h of crystallisation time and 110°C of crystallisation temperature and the lamellar structure was more uniform by solid grinding. Furthermore, the addition of iron can activate H
2 O2 more effectively to generate active oxygen which is •OH. The degradation experiments demonstrated that nearly 99.0% degradation efficiency was achieved for 10 mg/L Malachite Green (MG) solution within 60 min at the conditions of 0.10 g·L−1 MgAlFe-HTLcs, 0.10 mol·L-1 H2 O2 and a natural pH of 6.3. Total organic carbon (TOC) removal reached 72.2% in a 70 min reaction. BET and XRD were measured to further discuss the stability and durability. Finally, a possible mechanism for the degradation of MG was presumed. [ABSTRACT FROM AUTHOR]- Published
- 2024
- Full Text
- View/download PDF