Transformation kinetics and pathways of tetracycline antibiotics with manganese oxide

Degradation of benzotriazole by a novel Fenton-like reaction with mesoporous Cu/MnO 2 : Combination of adsorption and catalysis oxidation

“…2(B)), showing that the intensity of Mn 3+ increased and that of Mn 4+ decreased after surface adsorption ( Table 1), suggesting that a surface redox reaction between BZA and MCM led to partial reduction of Mn 4+ to Mn 3+ . The oxidation of organic pollutants by MnO 2 has been reported previously [56,57]. Furthermore, three intermediates (B-1, B-2, and B-4) of the oxidation of BZA by Mn 4+ were identified by liquid chromatography-mass spectrometry (LC-MS/MS) in the preadsorption phase (Table S2 and Fig.…”

Sorption and desorption of tetracycline on layered manganese dioxide birnessite

“…The Mn 2? concentration after 4 h in equilibrium with TC at an initial concentration of 25 lM was 150 lM, and the TC concentration dropped from 25 to 5 lM in a previous study (Chen and Huang 2011). Similarly, for oxytetracycline degradation by MnO 2 , accompanying 23 lM of oxytetracycline degradation, 14 lM Mn 2?…”

“…For these reasons, many studies were conducted on their interactions with soils, iron oxides, and other clay minerals over the last 10 years (Figueroa et al 2004(Figueroa et al , 2010Figueroa and Mackay 2005;Karthikeyan 2005, 2008;Gu et al 2007;Chang et al 2009aChang et al , b, 2012Li et al 2010a, b). Although the removal of TC from water was via adsorption onto many types of the geologic solids, degradation of TC in the presence of manganese oxide was also attributed to one of the major mechanisms of TC removal (Chen and Huang 2011;.…”

“…The oxidation of As(III) by manganese oxide was an important reaction in both the natural cycling of As and the development of remediation technology for lowering As(III) concentration in drinking water (Mohan and Pittman 2007). Recently, studies have been conducted to investigate the birnessite-facilitated destruction of TC or ciprofloxacin (CIP) in aqueous solutions (Zhang and Huang 2005;Rubert and Pedersen 2006;Chen and Huang 2011;). An extensive decomposition of clindamycin and lincomycin in aqueous solution could be achieved using synthetic manganese dioxide (d-MnO 2 ) (Chen et al 2010).…”

Removal of tetracycline from water by Fe-Mn binary oxide

“…High performance liquid chromatography (HPLC) was used to analyze the TC concentration in water before and after the adsorption. Moreover, total organic carbon (TOC) was used to evaluate the removal of tetracycline, because some soluble metal-tetracycline could be formed after the adsorption (Gu and Karthikeyan, 2005) and the oxidation intermediate products might be released into water (Chen and Huang, 2011). In addition, a tetracycline removal mechanism was elucidated.…”