Natural diatomites: Efficient green catalyst for Fenton-like oxidation of Orange II

Inchaurrondo, Natalia; Font, Josep; Ramos, Cinthia Paula; Haure, Patricia M.

doi:10.1016/j.apcatb.2015.08.022

Cited by 78 publications

(24 citation statements)

References 71 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…After catalytic degradation for 10 min, the disappearance of peaks at 229 nm and 310 nm suggests breakage benzene ring and naphthalene structure of AO7. The absorbance of peak at 484 nm significantly declines with extending the reaction time, suggesting AO7 degradation via destruction of chromophore groups . The variation of absorption peak of chromophore groups is consistent with an obvious discoloration of AO7 solution with reaction time (the inset of Figure ).…”

Section: Resultssupporting

confidence: 66%

“…In Figure , absorption peaks at 230, 312, and 484 nm could be observed in the UV–vis spectrum of AO7. The absorption peak at 484 nm in the visible region corresponds to the chromophore containing azo bond, whereas the peaks at 230 nm and 312 nm in the ultraviolet region are assigned to the benzene ring and naphthalene structure . After catalytic degradation for 10 min, the disappearance of peaks at 229 nm and 310 nm suggests breakage benzene ring and naphthalene structure of AO7.…”

Section: Resultsmentioning

confidence: 99%

“…Also, the redshift of absorption peak of chromophore group agrees well with color change in the AO7 solution, and this may be attributed to adsorption or structure change in AO7 molecule in the presence of Cu/C composites. The absorption in the UV range is reduced but not disappears completely, indicating uncompleted destruction of degradation intermediates …”

Section: Resultsmentioning

confidence: 99%

“…The produced intermediates are decomposed into inorganic molecules such as NO 3 − , SO 4 2− , H 2 O, and CO 2 , and complete degradation of AO7 can be shown as Eq.

2 \equiv {Cu}^{0} + H_{2} O_{2} + 2 H^{+} \to 2 {Cu}_{ads}^{+} + 2 H_{2} normalO

{Cu}_{ads}^{+} + H_{2} O_{2} \to {Cu}_{ads}^{2 +} + • {OH}_{ads} + {OH}^{-}

{Cu}_{ads}^{2 +} + H_{2} O_{2} \to {Cu}_{ads}^{+} + • {OOH}_{ads} + H^{+}

C_{16} H_{11} N_{2} {NaO}_{4} normalS + 42 H_{2} O_{2} \to 16 {CO}_{2} + 46 H_{2} normalO + 2 {HNO}_{3} + {NaHSO}_{4}

…”

Section: Resultsmentioning

confidence: 99%

See 3 more Smart Citations

Copper/carbon composites from waste printed circuit boards as catalysts for Fenton‐like degradation of Acid Orange 7 enhanced by ultrasound

et al. 2019

View full text Add to dashboard Cite

A novel strategy of “waste treating waste” has been implemented in this work. Copper/carbon (Cu/C) composites prepared by the carbonization of waste printed circuit boards (PCBs) were used for the degradation of Acid Orange 7 (AO7). Catalytic degradation of AO7 was conducted by varying carbonization temperatures, catalyst dosage, H2O2 dosage, AO7 concentration, pH values, and anions. Ultrasound significantly improved AO7 degradation, obtaining 93.27% degradation within 90 min. We report that Cu/C composites show good catalytic activity in a broad pH range. Cu/C catalysts were characterized by multitechniques. Cu0 was the main active component for the generation of •OH that was the reactive oxidant for AO7 degradation. The plausible pathway and catalytic mechanism for AO7 degradation were proposed. The unique structure of Cu/C composites gave a combined mechanism of adsorption and catalysis. Cu/C composites showed superior durability for AO7 degradation. Using Cu/C composites as catalysts provides a green approach for wastewater treatment and waste management. © 2019 American Institute of Chemical Engineers AIChE J, 65: 1234–1244, 2019

show abstract

Section: Resultssupporting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…The produced intermediates are decomposed into inorganic molecules such as NO 3 − , SO 4 2− , H 2 O, and CO 2 , and complete degradation of AO7 can be shown as Eq.

2 \equiv {Cu}^{0} + H_{2} O_{2} + 2 H^{+} \to 2 {Cu}_{ads}^{+} + 2 H_{2} normalO

{Cu}_{ads}^{+} + H_{2} O_{2} \to {Cu}_{ads}^{2 +} + • {OH}_{ads} + {OH}^{-}

{Cu}_{ads}^{2 +} + H_{2} O_{2} \to {Cu}_{ads}^{+} + • {OOH}_{ads} + H^{+}

C_{16} H_{11} N_{2} {NaO}_{4} normalS + 42 H_{2} O_{2} \to 16 {CO}_{2} + 46 H_{2} normalO + 2 {HNO}_{3} + {NaHSO}_{4}

…”

Section: Resultsmentioning

confidence: 99%

See 2 more Smart Citations

Copper/carbon composites from waste printed circuit boards as catalysts for Fenton‐like degradation of Acid Orange 7 enhanced by ultrasound

et al. 2019

View full text Add to dashboard Cite

show abstract

“…The special supported catalysts with the highest performance effi ciency were produced at a calcination temperature of 400ºC. The catalyst preparations were characterized by SEM, EDX, and XRD [29][30].…”

Section: Characterization Of the Special Supported Catalysts With Thementioning

confidence: 99%

Efficiency Optimization of Pharmaceutical Wastewater Treatment by a Microwave-Assisted Fenton-Like Process Using Special Supported Catalysts

2016

Pol. J. Environ. Stud.

View full text Add to dashboard Cite

Surface-Functionalized Diatom Silica as a Bio-Absorbent for the Removal of Toxins from Water

Bhat

Uthappa

Kurkuri

2021

Nanotechnology in the Life Sciences

View full text Add to dashboard Cite

Natural diatomites: Efficient green catalyst for Fenton-like oxidation of Orange II

Cited by 78 publications

References 71 publications

Copper/carbon composites from waste printed circuit boards as catalysts for Fenton‐like degradation of Acid Orange 7 enhanced by ultrasound

Copper/carbon composites from waste printed circuit boards as catalysts for Fenton‐like degradation of Acid Orange 7 enhanced by ultrasound

Efficiency Optimization of Pharmaceutical Wastewater Treatment by a Microwave-Assisted Fenton-Like Process Using Special Supported Catalysts

Surface-Functionalized Diatom Silica as a Bio-Absorbent for the Removal of Toxins from Water

Contact Info

Product

Resources

About