Accelerating effects of biochar for pyrite-catalyzed Fenton-like oxidation of herbicide 2,4-D

Zhu, Xiaoxiao; Li, Jianfa; Xie, Bin; Feng, Dongqing; Li, Yimin

doi:10.1016/j.cej.2019.123605

Cited by 64 publications

(21 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The specific degradation pathway of 2,4-D in Fenton-like oxidation by H 2 O 2 included dechlorination, hydroxylation, and opening of the aromatic ring, with the short-chain organic acids dominated the residual TOC. 43 Furthermore, the co-catalysis of trace Fe( iii ) (0.30 mg L −1 ) with biochar was also found in oxidation of another pollutant SMZ (Fig. S3 † ).…”

Section: Resultsmentioning

confidence: 83%

“…The production ˙OH and superoxide anion radical (O 2 ˙ − ) in various reaction systems was also determined by electron paramagnetic resonance (EPR) spectrometry (FA-200, JEOL, Japan). 43 …”

Section: Methodsmentioning

confidence: 99%

“…The concentration of p -HBA, 2,4-D or SMZ was measured using high performance liquid chromatography (LC-20A, Shimadzu, Japan). The details for analysis of p -HBA and 2,4-D can be found in our previous study, 43 and SMZ was analyzed at 275 nm using an eluent composed of acetonitrile and 0.1% acetic acid (v/v = 40/60). The H 2 O 2 or Fe( ii ) concentration was measured using UV-vis spectrophotometry (Spectrum 1920, Shanghai, China).…”

Section: Methodsmentioning

confidence: 99%

See 2 more Smart Citations

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Resultsmentioning

confidence: 83%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

See 1 more Smart Citation

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

et al. 2022

Self Cite

View full text Add to dashboard Cite

show abstract

“…• The generation of Fe(OH) 2 increases the pH till pH = 4.0. • Ferric hydroxide residual sludge (Zhu et al, 2020;Zhu et al, 2019…”

Section: Fentonmentioning

confidence: 99%

Sustainable ferrate oxidation: Reaction chemistry, mechanisms and removal of pollutants in wastewater

Dar

Pan

Qin

et al. 2021

Environmental Pollution

View full text Add to dashboard Cite

“…Based on the molar yield of • OH, the utilization efficiency of H2O2 was enhanced from 17% in the FeS/Fe3O4 system to 83% in the FeS/Fe3O4@BC500 system with the aid of biochar. The dramatically enhanced yield of • OH should be related to the stabilization of radicals by resonance effect from aromatic carbon and/or hydroquinone/quinone structure of biochar [49], which contributed to the accumulation of persistent free radicals in biochar according to previous studies [16,17]. Furthermore, in the solution of the FeS/Fe3O4 system, Fe 2+ content increased first, but then decreased in the later stage (after reaction of 30 min) (Figure 7a), which should be resulted from the oxidation of Fe 2+ , as the total Fe in solution increased in the later stage.…”

Section: Investigation About the Reactive Speciesmentioning

confidence: 99%

Biochar-Supported FeS/Fe3O4 Composite for Catalyzed Fenton-Type Degradation of Ciprofloxacin

et al. 2019

Self Cite

View full text Add to dashboard Cite

The Fenton-type oxidation catalyzed by iron minerals is a cost-efficient and environment-friendly technology for the degradation of organic pollutants in water, but their catalytic activity needs to be enhanced. In this work, a novel biochar-supported composite containing both iron sulfide and iron oxide was prepared, and used for catalytic degradation of the antibiotic ciprofloxacin through Fenton-type reactions. Dispersion of FeS/Fe 3 O 4 nanoparticles was observed with scanning electron microscopy-energy dispersive X-ray spectroscopy (SEM-EDS) and transmission electron microscopy (TEM). Formation of ferrous sulfide (FeS) and magnetite (Fe 3 O 4 ) in the composite was validated by X-ray diffraction (XRD) and X-ray photoelectron spectroscopy (XPS). Ciprofloxacin (initial concentration = 20 mg/L) was completely degraded within 45 min in the system catalyzed by this biochar-supported magnetic composite at a dosage of 1.0 g/L. Hydroxyl radicals (·OH) were proved to be the major reactive species contributing to the degradation reaction. The biochar increased the production of ·OH, but decreased the consumption of H 2 O 2 , and helped transform Fe 3+ into Fe 2+ , according to the comparison studies using the unsupported FeS/Fe 3 O 4 as the catalyst. All the three biochars prepared by pyrolysis at different temperatures (400, 500 and 600 • C) were capable for enhancing the reactivity of the iron compound catalyst.

show abstract

Accelerating effects of biochar for pyrite-catalyzed Fenton-like oxidation of herbicide 2,4-D

Cited by 64 publications

References 76 publications

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

Co-catalysis of trace dissolved Fe(iii) with biochar in hydrogen peroxide activation for enhanced oxidation of pollutants

Sustainable ferrate oxidation: Reaction chemistry, mechanisms and removal of pollutants in wastewater

Biochar-Supported FeS/Fe3O4 Composite for Catalyzed Fenton-Type Degradation of Ciprofloxacin

Contact Info

Product

Resources

About