Oxidation of some phenolic compounds with Cu(III)

Chandra, Sudhir; Yadava, K. L.

doi:10.1016/0026-265x(70)90165-7

Cited by 18 publications

(5 citation statements)

References 5 publications

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“…Different from Fe 2þ , Cu 2þ is more stable to activate PS, although at a lower reaction rate. Notably, the generated Cu 3þ is unstable and could oxidize FLU and reproduce Cu 2þ , which can further participate in activating PS (Chandra and Yadava, 1970;Liu et al, 2012). Similar findings were also reported during PS degradation of propachlor (Liu et al, 2012), carbamazepine (Rao et al, 2014) and diuron (Tan et al, 2012).…”

Section: Ps Oxidation Of Flu By Common Activation Methodssupporting

confidence: 77%

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

et al. 2015

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Section: Ps Oxidation Of Flu By Common Activation Methodssupporting

confidence: 77%

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

et al. 2015

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“…It is thus inferred the interaction between Cu(II) and PS leads to the formation of a weak bond at the surface of the CuO-Fe 3 O 4 (eqs and ), accompanied by the generation of Cu(III) and SO 4 •– radicals. The formed Cu(III) is unstable in the absence of strong chealting anions , and could result in the formation of HO • via eq …”

Section: Resultsmentioning

confidence: 99%

“…•− radicals. The formed Cu(III) is unstable in the absence of strong chealting anions 33,35 and could result in the formation of HO • via eq 9. (8)…”

Section: Environmental Science and Technologymentioning

confidence: 99%

Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe₃O₄: Mechanism, Stability, and Effects of pH and Bicarbonate Ions

Yang

Chen

et al. 2015

Environ. Sci. Technol.

670

167

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Magnetic CuO-Fe3O4 composite was fabricated by a simple hydrothermal method and characterized as a heterogeneous catalyst for phenol degradation. The effects of pH and bicarbonate ions on catalytic activity were extensively evaluated in view of the practical applications. The results indicated that an increase of solution pH and the presence of bicarbonate ions were beneficial for the removal of phenol in the CuO-Fe3O4 coupled with persulfate (PS) process. Almost 100% mineralization of 0.1 mM phenol can be achieved in 120 min by using 0.3 g/L CuO-Fe3O4 and 5.0 mM PS at pH 11.0 or in the presence of 3.0 mM bicarbonate. The positive effect of bicarbonate ion is probably due to the suppression of copper leaching as well as the formation of Cu(III). The reuse of catalyst at pH0 11.0 and 5.6 showed that the catalyst remains a high level of stability at alkaline condition (e.g., pH0 11.0). On the basis of the characterization of catalyst, the results of metal leaching and EPR studies, it is suggested that phenol is mainly destroyed by the surface-adsorbed radicals and Cu(III) resulting from the reaction between PS and Cu(II) on the catalyst. Taking into account the widespread presence of bicarbonate ions in waste streams, the CuO-Fe3O4/PS system may provide some new insights for contaminant removal from wastewater.

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“…(47)) Cu 2 + SO •-4 and the limited oxidizability of due to its instability. pollutants, but the reaction time (66 h) in a PS/ system was much longer than Cu 2 + that in PS/ZVC/US system (1 h) [68].…”

Section: Cu 2 +mentioning

confidence: 90%

“…S12, suggesting that •O has low chemical reactivity with BPAF and could even impede the formation of •OH. Work of this kind studying the influence of DO has already been done by C. Tan et al [66], in which DO competed with antipyrine for and thus SO •-Since is relatively stable, it will gradually diffuse into the solution, which In addition, the generation of -which is unstable but might be another Cu 3 + potential oxidant for the degradation of organic pollutants-serves as another oxidation mechanism to reinforce BPAF degradation [68]. To further investigate the contribution of a homogeneous catalyst to the degradation and reaction mechanisms, the concentration of the leached was first determined.…”

Section: Influence Of Coexisting Inorganic Anionsmentioning

confidence: 99%

Ultrasound-enhanced zero-valent copper activation of persulfate for the degradation of bisphenol AF

Wang

Cao

Han

et al. 2019

Chemical Engineering Journal

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Ultrasound (US) was introduced into a persulfate (PS) / zero-valent copper (ZVC) system for the degradation of bisphenol AF (BPAF). In this system, ZVC worked as a catalyst to activate PS. Compared with the PS/ZVC process, the degradation rate of BPAF in the PS/ZVC/US system raised significantly from 59.8% to 97.0% due to a synergistic interaction between sonolysis and a heterogeneous reaction. When ultrasound was 120 W at 20 kHz and initial BPAF concentration was 20 mol/L, the BPAF could be completely removed after a 60-min reaction with 0.5 g/L ZVC, 1 mM PS. According to kinetics research, the decomposition of BPAF in a PS/ZVC/US system could be separated into two stages with a demarcation point after about 20 min of reaction via pseudo-first-order rate constants (). A Quantitative analytical k obs modeling for the study of main radicals was established, and the result indicated was the predominant radical in acidic conditions and both •OH and SO •-4 SO •-4 were the predominant radicals in relative basic conditions. Moreover, the effects of initial persulfate dosage, initial BPAF concentration, and coexisting inorganic anions on BPAF degradation were evaluated. A high-accuracy mass spectrometer was used to study the oxidation process and potential activities were deduced. Finally, the possible reaction mechanisms in the PS/ZVC/US system is proposed that the surface heterogeneous catalysis was the key step to activate PS. This work will promote the understanding of the utilization of ZVC in advanced oxidation and also the key role of in activating PS. Cu +

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Oxidation of some phenolic compounds with Cu(III)

Cited by 18 publications

References 5 publications

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe₃O₄: Mechanism, Stability, and Effects of pH and Bicarbonate Ions

Ultrasound-enhanced zero-valent copper activation of persulfate for the degradation of bisphenol AF

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Oxidation of some phenolic compounds with Cu(III)

Cited by 18 publications

References 5 publications

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

Degradation of flumequine in aqueous solution by persulfate activated with common methods and polyhydroquinone-coated magnetite/multi-walled carbon nanotubes catalysts

Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe3O4: Mechanism, Stability, and Effects of pH and Bicarbonate Ions

Ultrasound-enhanced zero-valent copper activation of persulfate for the degradation of bisphenol AF

Contact Info

Product

Resources

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Heterogeneous Degradation of Organic Pollutants by Persulfate Activated by CuO-Fe₃O₄: Mechanism, Stability, and Effects of pH and Bicarbonate Ions