Thermal activation significantly improves the organic pollutant removal rate of low-grade manganese ore in a peroxymonosulfate system.

ABSTRACT: Low-cost, eco-friendly and effective catalysts are essential for activating peroxymonosulfate (PMS) to purify water. Hence, we investigated using thermal activation natural low-grade manganese ore (CNMO) as an effective catalyst to activate PMS for the removal of Acid Orange 7 (AO7), a harmful azo dye. CNMO exhibited a more effective activation ability than either the pure component substances alone or natural manganese ore (NMO), owing to its increased charge transfer, pore size and acidic sites. The activation mechanism of PMS was elucidated, and the degradation of AO7 was noted to have been caused by singlet oxygen (¹O₂), and increased electron transfer. Moreover, the outstanding degradation of AO7 in actual water indicated that the CNMO/PMS system was highly resis

SUBMITTER: Chen Y 

PROVIDER: S-EPMC9295551 | biostudies-literature | 2022 Jul

REPOSITORIES: biostudies-literature