Abstract:Manganese-modified silicate ore showed remarkable catalytic oxidation activity for ciprofloxacin degradation and the corresponding mechanism was revealed.
“…This result suggests that OC was not efficiently decomposed in the ozone treatment [ 66 ], while CIP degraded through a large number of intermediates which were easily attacked directly by ozone. Such results were previously reported before in several studies [ 21 , 66 , 67 , 68 , 69 ]. Figure 5 (A) The removal of OC (left panel) and CIP (right panel) using the APO system and the FO system, and (B) the plot of C / C 0 of OC treated using the APO system (black squares) and the FO system (red circles) as a function of treatment time and the best fits of single exponential function.…”
“…This result suggests that OC was not efficiently decomposed in the ozone treatment [ 66 ], while CIP degraded through a large number of intermediates which were easily attacked directly by ozone. Such results were previously reported before in several studies [ 21 , 66 , 67 , 68 , 69 ]. Figure 5 (A) The removal of OC (left panel) and CIP (right panel) using the APO system and the FO system, and (B) the plot of C / C 0 of OC treated using the APO system (black squares) and the FO system (red circles) as a function of treatment time and the best fits of single exponential function.…”
“… 7 Combining ozone with the solid phase catalysts can accelerate the decomposition of ozone into hydroxyl radicals (·OH) and somehow overcome the limitations of ozonation alone. 8 It has relatively low energy demand and high degradation and mineralization effectiveness of some refractory organic pollutants in waters, thus becoming a research hot spot in the field of ozone oxidation. 7 So far, various solid catalysts have been reported including metal oxides, supported metals/metal oxides and some porous materials.…”
“…Ozonation studies using natural Mn ores were presented by Chen et al [ 165 ] and Van and Trinh [ 166 ]. In addition, Luo et al [ 167 ] employed a Mn-modified silicate ore as a catalyst in the ozonation reaction. The main results are presented below.…”
Section: Natural Mineral Catalystsmentioning
confidence: 99%
“…Luo et al [ 167 ] used a manganese modified silicate ore (MnSO by impregnation method) in the catalytic ozonation of ciprofloxacin (CIP). The characterization of the MnSO catalyst showed a homogeneously distributed MnOx (MnO 2 and Mn 2 O 3 ) over the surface of the silicate (SO) (13.35% wt / wt of Mn).…”
Ozone has been successfully employed in water treatment due to its ability to oxidize a wide variety of refractory compounds. In order to increase the process efficiency and optimize its economy, the implementation of heterogeneous catalysts has been encouraged. In this context, the use of cheap and widely available natural materials is a promising option that would promote the utilization of ozone in a cost-effective water treatment process. This review describes the use of natural clays, zeolites and oxides as supports or active catalysts in the ozonation process, with emphasis on the structural characteristics and modifications performed in the raw natural materials; the catalytic oxidation mechanism; effect of the operating parameters and degradation efficiency outcomes. According to the information compiled, more research in realistic scenarios is needed (i.e., real wastewater matrix or continuous operation in pilot scale) in order to transfer this technology to the treatment of real wastewater streams.
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