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- Title
Effective activation of peroxymonosulfate by CoCr-LDH for removing organic contaminants in water: from lab-scale to practical applications.
- Authors
Dung, Nguyen Trung; Ha, Do Thi Hong; Thao, Vu Dinh; Thao, Nguyen Phuong; Lam, Tran Dai; Lan, Pham Thi; Trang, Tran Thi; Ngan, Le Viet; Nhi, Bui Dinh; Thuy, Nguyen Thi; Lin, Kun-Yi Andrew; Huy, Nguyen Nhat
- Abstract
In this study, CoCr layered double hydroxide material (CoCr-LDH) was prepared and used as an effective catalyst for peroxymonosulfate (PMS) activation to degrade organics in water. The prepared CoCr-LDH material had a crystalline structure and relatively porous structure, as determined by various surface analyses. In Rhodamine B (RhB) removal, the most outstanding PMS activation ability belongs to the material with a Co:Cr molar ratio of 2:1. The removal of RhB follows pseudo-first-order kinetics (R2 > 0.99) with an activation energy of 38.23 kJ/mol and efficiency of 98% after 7 min of treatment, and the total organic carbon of the solution reduced 47.2% after 10 min. The activation and oxidation mechanisms were proposed and the RhB degradation pathways were suggested with the key contribution of O2•- and 1O2. Notably, CoCr-LDH can activate PMS over a wide pH range of 4 – 9, and apply to a wide range of organic pollutants and aqueous environments. The material has high stability and good recovery, which can be reused for 5 cycles with a stable efficiency of above 88%, suggesting a high potential for practical recalcitrant water treatment via PMS activation by heterogeneous catalysts.
- Subjects
ORGANIC water pollutants; PEROXYMONOSULFATE; RHODAMINE B; HETEROGENEOUS catalysts; WATER purification
- Publication
Environmental Science & Pollution Research, 2024, Vol 31, Issue 18, p26773
- ISSN
0944-1344
- Publication type
Article
- DOI
10.1007/s11356-024-32776-2