Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles

Zhang, Jing; Sun, Bo; Huang, Youhua; Guan, Xiaohong

doi:10.1016/j.chemosphere.2015.06.088

Cited by 12 publications

(5 citation statements)

References 32 publications

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“…When 100 μM of KMnO 4 reacted with 10 μM of SMX for 30 min, less than 10% of SMX was oxidized (Figure A). This result is in accordance with previous study, that KMnO 4 alone could not effectively oxidize SMX . KMnO 4 has advantages on selectively attacking unsaturated bonds of emerging pollutants such as steroid estrogens and phenols .…”

Section: Resultssupporting

confidence: 93%

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Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Tian

Wang

Liu

et al. 2019

Environ. Sci. Technol.

145

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Sulfamethoxazole (SMX) is a broad-spectrum antibiotic and was largely used in breeding industry. The reaction rate of SMX with KMnO4 is slow, and the adsorption efficiency of biochar for SMX was inferior (less than 11% in 30 min). By adding biochar powder into SMX solution with the addition of permanganate, the oxidation ratio of SMX surged to 97% in 30 min, and over 58% of the total organic carbon (TOC) was simultaneously removed. KMnO4 interacted with biochar and resulted in the formation of highly oxidative intermediate manganese species, which transformed SMX into hydrolysis products, oxygen-transfer products, and self-coupling products. Brunauer–Emmett–Teller (BET) analysis showed that surface area, total pore volume, and micropore volume of biochar increased by 32.1%, 36.4%, and 80.6%, respectively, after reaction process. This in situ activation of biochar with KMnO4 enhanced its adsorption capacity and led to great improvement of TOC removal. Besides KMnO4 oxidation, biochar also enhanced TOC removal in Mn(III) oxidation (KMnO4+ bisulfite) and ozonization of SMX. Considering that KMnO4 could react with biochar and result in the formation of intermediate manganese species, while biochar can be simultaneously activated and exhibit high capacity for organic adsorption, the combination of biochar with the chemical/advanced oxidation could be a promising process for the removal of environmental pollutants.

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Section: Resultssupporting

confidence: 93%

“…This result is in accordance with previous study, that KMnO 4 alone could not effectively oxidize SMX. 23 KMnO 4 has advantages on selectively attacking unsaturated bonds of emerging pollutants such as steroid estrogens and phenols. 6 However, SMX is composed by benzene sulfinic part and oxazole part, and both of them are recalcitrant.…”

Section: Resultsmentioning

confidence: 99%

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Tian

Wang

Liu

et al. 2019

Environ. Sci. Technol.

145

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“…In addition, MnO 4 À can also oxidize organic micropollutants present in water and the oxidation reaction is selective depending on the electron density of certain moieties of a micropollutant. For example, the second-order rate constants (k) for the reactions of MnO 4 À with salbutamol and sulfamethoxazole were reported to be 283 and 0.11 M À1 s À1 at pH 7, respectively, which show a great difference (Rodríguez-Alvarez et al, 2015;Zhang et al, 2015). As the pH increased, even though the redox potential of Mn(VII) decreased, the reactivity of MnO 4 À toward phenol, lincomycin and sulfamethoxazole increased (Hu et al, 2010;Du et al, 2012;Gao et al, 2014), but the reactivity toward trimethoprim decreased (Hu et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Impact of humic acid on the degradation of levofloxacin by aqueous permanganate: Kinetics and mechanism

et al. 2017

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Levofloxacin (LF) is a frequently detected fluoroquinolone in surface water, and permanganate (MnO) is a commonly used oxidant in drinking water treatment. This study investigated the impact of humic acid (HA) on LF degradation by aqueous MnO from both kinetic and mechanistic aspects. In the absence of HA, the second-order rate constant (k) of LF degradation by MnO was determined to be 3.9 M s at pH 7.5, which increased with decreasing pH. In the presence of HA, the pseudo-first-order rate constant (k) of LF degradation at pH 7.5 was significantly increased by 3.8- and 2.8-fold at [HA]:[KMnO] (mass ratio) = 0.5 and 1, respectively. Secondary oxidant scavenging and electron paramagnetic resonance tests indicated that HA could form a complex with Mn(III), a strongly oxidative intermediate produced in the reaction of MnO with HA, to induce the successive formation of superoxide radicals (O) and hydroxyl radicals (OH). The resulting OH primarily contributed to the accelerated LF degradation, and the complex [HA-Mn(III)] could account for the rest of acceleration. The degradation of LF and its byproducts during MnO oxidation was mainly through hydroxylation, dehydrogenation and carboxylation, and the presence of HA led to a stronger destruction of LF. This study helps better understand the degradation of organic micropollutants by MnO in drinking water treatment.

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“…Figure shows that the electrodes prepared by electroplating were scanned by broad‐spectrum and narrow‐spectrum before and after annealing. The absorption peaks of the electron binding energy around 530 and 284 eV (1 eV = 1.602 × 10 −19 joule should attributed to O1s and Ru3d . The narrow scan spectrum of the Ru before annealing was fitted into three peaks.…”

Section: Resultsmentioning

confidence: 74%

“…The absorption peaks of the electron binding energy around 530 and 284 eV (1 eV = 1.602 × 10 −19 joule should attributed to O1s and Ru3d. [38] The narrow scan spectrum of the Ru before annealing was fitted into three peaks. After annealing, the binding energy of Ru at 287 eV was reduced, indicating the existence of an interaction between Ru and Ti.…”

Section: Xps Analysismentioning

confidence: 99%

Preparation and electrochemical performance of uniform RuO₂/Ti and RuO₂‐IrO₂/Ti electrode for electrolysis of NaCl solution

Ren

Liu

et al. 2019

Can J Chem Eng

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The electrochemical preparation of NaClO has been widely used for the production of industrial disinfectant. To reduce the cost of electrode preparation using the brushing method, this paper introduces a method for the electrodeposition for RuO2/Ti and RuO2‐IrO2/Ti preparation and NaCl solution electrolysis. The deposition of Ir improves the uniformity and stability of the RuO2/Ti electrode. The optimum preparation conditions and additive concentrations were investigated in detail through the orthogonal experiment. By adjusting the electroplating time, temperature and voltage, the electrode with a high content of available chlorine was synthesized successfully. The physicochemical properties of the as‐prepared RuO2/Ti and RuO2‐IrO2/Ti were determined by XRD, SEM‐EDS, and XPS, and the electrochemical performance and lifetime of the RuO2/Ti and RuO2‐IrO2/Ti was verified via an electrochemical workstation. Uniform and stable RuO2/TiO2 and RuO2‐IrO2/TiO2 were synthesized successfully for the electrolysis of the NaCl solution.

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Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles

Cited by 12 publications

References 32 publications

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Impact of humic acid on the degradation of levofloxacin by aqueous permanganate: Kinetics and mechanism

Preparation and electrochemical performance of uniform RuO₂/Ti and RuO₂‐IrO₂/Ti electrode for electrolysis of NaCl solution

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Catalyzing the oxidation of sulfamethoxazole by permanganate using molecular sieves supported ruthenium nanoparticles

Cited by 12 publications

References 32 publications

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Enhanced Permanganate Oxidation of Sulfamethoxazole and Removal of Dissolved Organics with Biochar: Formation of Highly Oxidative Manganese Intermediate Species and in Situ Activation of Biochar

Impact of humic acid on the degradation of levofloxacin by aqueous permanganate: Kinetics and mechanism

Preparation and electrochemical performance of uniform RuO2/Ti and RuO2‐IrO2/Ti electrode for electrolysis of NaCl solution

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Preparation and electrochemical performance of uniform RuO₂/Ti and RuO₂‐IrO₂/Ti electrode for electrolysis of NaCl solution