Degradation of chlorpyrifos formulation in water by the UV/H2O2 process: Lumped kinetic modelling of total organic carbon removal

Lescano, Maia Raquel; López, Alejandro; Romero, Roberto L.; Zalazar, Cristina Susana

doi:10.1016/j.jphotochem.2020.112924

Cited by 20 publications

(4 citation statements)

References 47 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure b shows that the removal rate of phenol in lake water and tap water has slightly decreased. The main reason for this difference is that carbonate species (HCO 3 – , CO 3 2– ) and phosphate species (HPO 4 2– , PO 4 3– , H 2 PO 4 – ) in actual water samples can inhibit active free radicals, but the removal rates in these actual water bodies still exceed 99%. Surprisingly, the degradation rate of phenol in seawater by the SN 1 BC-800/PMS system can reach 99.34% within one min, and the removal efficiency is even superior to that in pure water.…”

Section: Resultsmentioning

confidence: 99%

See 1 more Smart Citation

Nitrogen-Doped Biochar for Enhanced Peroxymonosulfate Activation to Degrade Phenol through Both Free Radical and Direct Oxidation Based on Electron Transfer Pathways

Xie,

Zhang,

et al. 2024

Langmuir

View full text Add to dashboard Cite

Nowadays, super nitrogen-doped biochar (SNBC) material has become one of the most promising metal-free catalysts for activating peroxymonosulfate (PMS) to degrade organic pollutants. To understand the evolution of SNBC properties with fabrication conditions, a variety of SNBC materials were prepared and characterized by elemental analysis, N 2 adsorption−desorption, scanning electron microscopy, Fourier transform infrared spectroscopy, Raman spectroscopy, X-ray photoelectron spectroscopy, and X-ray diffraction. We systematically investigated the activation potential of these SNBC materials for PMS to degrade phenol. SN 1 BC-800 with the best catalytic performance was obtained by changing the activation temperatures and the ratio of biochar to melamine. The effects of catalyst dosage, the PMS concentration, pH, and reaction temperature on phenol degradation were studied in detail. In the presence of 0.3 g/L SN 1 BC-800 and 1 g/L PMS, the removal rate of 20 mg/L phenol could reach 100% within 5 min. According to electron paramagnetic resonance spectra and free radical quenching experiments, a nonfree radical pathway of phenol degradation dominated by 1 O 2 and electron transfer was proposed. More interestingly, the excellent catalytic performance of the SN 1 BC-800/PMS system is universally applicable in the degradation of other typical organic pollutants. In addition, the degradation rate of phenol is still over 80% after five reuses, which shows that the SN 1 BC-800 catalyst has high stability and good application prospects in environmental remediation.

show abstract

Section: Resultsmentioning

confidence: 99%

“…actual water samples can inhibit active free radicals, 50 but the removal rates in these actual water bodies still exceed 99%. Surprisingly, the degradation rate of phenol in seawater by the SN 1 BC-800/PMS system can reach 99.34% within one min, and the removal efficiency is even superior to that in pure water.…”

Section: So Oh Hsomentioning

confidence: 99%

Nitrogen-Doped Biochar for Enhanced Peroxymonosulfate Activation to Degrade Phenol through Both Free Radical and Direct Oxidation Based on Electron Transfer Pathways

Xie,

Zhang,

et al. 2024

Langmuir

View full text Add to dashboard Cite

show abstract

“…The FOK model showed that direct mineralization of Fampridine was inhibited by direct decomposition of Fampridine, which resulted in the formation of nonoxidizable organic compound intermediates [21,54]. Hence, the compatibility of experimental data was tested for the MFOK model for TOC removal of Fampridine onto Ag@Cu 2 O NP.…”

Section: Kinetic Study Base On Fok and Mfok Modelmentioning

confidence: 99%

Enhanced Photocatalytic activity of bio mediated Ag@Cu2O NPs towards Fampridine: Kinetic modelling and mechanistic pathways

ATTRI,

Garg,

Rata

et al. 2023

Preprint

View full text Add to dashboard Cite

To enhance the photocatalytic activity of Cu2O NPs, Tabernaemontana divaricate leaf extract was used to synthesise Ag@Cu2O NPs. UV-Vis, XPS, XRD, and HR-TEM were used to characterize Ag@Cu2O NPs. The mechanism of Ag+ binding onto Cu2O NPs showed that plant extract was fully saturated with flavonoids and can implant Ag on the Cu2O NPs. XPS spectra of Ag@Cu2O NPs showed a shift towards lower binding energy in Cu 2p peaks from 932 eV to 931 eV and 952 eV to 951 eV, which confirmed the formation of Ag@Cu2O NPs. HR-TEM investigation of Ag@Cu2O NPs indicated that the lattice distance was (d = 0.25 nm) which corresponds to the (111) plane of Ag, which demonstrated the fabrication of Ag@Cu2O NPs. The degradation efficiency of fampridine was enhanced to 95% with 97% COD removal and 75% TOC conversion after 210 min using Ag@Cu2O NPs as compared to Cu2O NPs. The MFOK model was well fitted for the TOC conversion of fampridine, with R2 = 0.99 in comparison to the FOK model. LC-MS spectra for the degradation of fampridine have shown ten intermediate fragments. Ag@Cu2O NPs that were synthesised effectively inhibited the bacterial pathogen.

show abstract

“…Several studies in the field of wastewater treatment report lumped kinetic models designed to simulate the experimental data obtained from global parameters such as TOC, COD, and ORP. 28,47,48 Different lumped models have been applied to describe the overall kinetics of Fenton, Fenton-like, and photo-Fenton processes. Some authors have considered parallel reaction pathways for the oxidation of the target substrate that lead either to a group of intermediate reaction products or directly to a group of end products.…”

Section: Reaction Chemistry and Engineering Papermentioning

confidence: 99%

Combining multivariate curve resolution and lumped kinetic modelling for the analysis of lignin degradation by copper-catalyzed Fenton-like systems

2022

View full text Add to dashboard Cite

show abstract

Degradation of chlorpyrifos formulation in water by the UV/H2O2 process: Lumped kinetic modelling of total organic carbon removal

Cited by 20 publications

References 47 publications

Nitrogen-Doped Biochar for Enhanced Peroxymonosulfate Activation to Degrade Phenol through Both Free Radical and Direct Oxidation Based on Electron Transfer Pathways

Nitrogen-Doped Biochar for Enhanced Peroxymonosulfate Activation to Degrade Phenol through Both Free Radical and Direct Oxidation Based on Electron Transfer Pathways

Enhanced Photocatalytic activity of bio mediated Ag@Cu2O NPs towards Fampridine: Kinetic modelling and mechanistic pathways

Combining multivariate curve resolution and lumped kinetic modelling for the analysis of lignin degradation by copper-catalyzed Fenton-like systems

Contact Info

Product

Resources

About