We found a match
Your institution may have access to this item. Find your institution then sign in to continue.
- Title
Preparation of cobalt ferrite nanoparticles and application as peroxymonosulfate activators for the removal of Congo red.
- Authors
Zulhumar Musajan; Pengfei Xiao; Jing Zhao; Shuang Han; Qirui Wang
- Abstract
Persulfate-based advanced oxidation processes have been widely considered efficient remediation methods, and ferrite is a satisfactory activator of persulfate (PS) for the removal of environmental pollutants. Herein, cobalt ferrite nanoparticles (nano-CoFe2O4) were synthesized by the co-precipitation method and used to activate peroxymonosulfate (PMS) for the degradation of Congo red (CR) in aqueous solution. The results of characterization analysis showed that these nanoparticles exhibit an average crystallite size in the range of 13.96-25.17 nm, with a spherical structure, rich functional groups on their surfaces, and excellent magnetic and thermal stability. Furthermore, degradation experiments were designed to investigate the effects of a single factor, including the initial CR concentration, PMS concentration, catalyst dosage, initial pH and coexisting ions. The corresponding removal behaviour is in good agreement with the pseudo-first-order dynamics model. In addition, in the nano-CoFe2O4/PMS system, according to the identification results of reactive oxygen species, superoxide radical (•O2-) and singlet oxygen radical (1O2) species were the major active species that degraded CR, and the mechanism of PMS activation was comprehensively proposed. Meanwhile, after nano-CoFe2O4 was used five times continuously, the CR removal efficiency in the nano-CoFe2O4/PMS system decreased by only 7%, indicating that the prepared catalyst has excellent reusability. Therefore, the nano-CoFe2O4 synthesized in this research represents a novel, economical and efficient activator of PMS for the degradation of organic dyes in industrial wastewater.
- Subjects
CONGO red (Staining dye); POLLUTANTS; ORGANIC dyes; PEROXYMONOSULFATE; COBALT; FERRITES; REACTIVE oxygen species
- Publication
Desalination & Water Treatment, 2022, Vol 254, p274
- ISSN
1944-3994
- Publication type
Article
- DOI
10.5004/dwt.2022.28332