Chen Yi, Yin Ping, Dong Shuai, Wei Shiyue, Gu Jinchuan, Cen Wanglai
School of Food and Bioengineering, Civil Engineering and Architecture and Environment, Xihua University Chengdu 610039 PR China
Sichuan Rongxinkai Engineering Design Co.Ltd Chengdu 610039 PR China.
RSC Adv. 2022 Jul 19;12(32):20735-20745. doi: 10.1039/d2ra02970g. eCollection 2022 Jul 14.
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 (O), and increased electron transfer. Moreover, the outstanding degradation of AO7 in actual water indicated that the CNMO/PMS system was highly resistant to surrounding organic and inorganic compounds, and the CNMO exhibited extraordinarily high stability and recyclability. Thus, this study provides not only a new choice of PMS activator that offers low cost, and excellent and stable performance, but also a novel direction for the efficient utilization of low-grade manganese ore.
低成本、环保且高效的催化剂对于激活过一硫酸盐（PMS）以净化水至关重要。因此，我们研究了使用热活化天然低品位锰矿石（CNMO）作为一种有效的催化剂来激活PMS，以去除有害的偶氮染料酸性橙7（AO7）。由于电荷转移、孔径和酸性位点的增加，CNMO表现出比单独的纯组分物质或天然锰矿石（NMO）更有效的活化能力。阐明了PMS的活化机制，并指出AO7的降解是由单线态氧（O）和增加的电子转移引起的。此外，AO7在实际水中的出色降解表明CNMO/PMS系统对周围的有机和无机化合物具有高度抗性，并且CNMO表现出极高的稳定性和可回收性。因此，本研究不仅提供了一种低成本、性能优异且稳定的PMS活化剂的新选择，还为低品位锰矿石的高效利用提供了新的方向。
