Effects of dissolved oxygen on dye removal by zero-valent iron

Wang, Kai-Sung; Lin, Chia Feng; Wei, Ming-Chi; Liang, Hsiu-Hao; Li, Heng-Ching; Chang, Chia-Hsuin; Fang, Yung-Tai; Chang, Shih-Hsien

doi:10.1016/j.jhazmat.2010.07.002

Cited by 114 publications

(35 citation statements)

References 32 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…The oxidation of iron (i.e., corrosion) can be coupled with the reductive conversion of a variety of organic and inorganic pollutants in water. Although the reductive conversion in the ZVI process has been extensively studied [1][2][3][4], its applications to the oxidative conversion of aquatic contaminants were only recently recognized [5][6][7][8][9]. The ZVI-induced oxidative transformation is based on the reductive activation of O 2 by ZVI (E 0 (Fe 2+ /Fe 0 ) = −0.44 V NHE ), which leads to the generation of H 2 O 2 which subsequently decomposes into OH radicals through Fenton type reaction.…”

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on the zero valent iron induced oxidation reaction

Kim

Choi

2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

Section: Introductionmentioning

confidence: 99%

Effect of magnetic field on the zero valent iron induced oxidation reaction

Kim

Choi

2011

Journal of Hazardous Materials

View full text Add to dashboard Cite

“…However, it is well known that oxidation capacity of ozone alone can be articially accelerated by increasing the pH because hydroxide ions can initiate ozone decomposition to generate HOc. 33 The converse variation trend can be explained from two aspects, (a) the lower initial pH can accelerate the iron corrosion rate and rapidly generate enough corrosion products (e.g., Fe 2+ /Fe 3+ , FeOOH, Fe 2 O 3 or Fe 3 O 4 ), which can catalyze ozone decomposition to generate HOc; [38][39][40][41] (b) the lower initial pH can also facilitate the formation of Fenton-like reaction under oxic condition (eqn (1) and (2)), 42 which can improve the mineralization of the pollutants in ammunition wastewater.…”

Section: Resultsmentioning

confidence: 99%

“…42 Besides the Fenton-like reaction, however, catalytic ozonation also plays a leading role in the mineralization process. In addition, the similar results were reported when the dyes (e.g., reactive red X-3B, azo dye RR2, and Reactive Black 5) were degraded by ozone integrated with internal micro-electrolysis.…”

Section: Synergetic Effect Between Mfe 0 and Ozonementioning

confidence: 99%

Mineralization of ammunition wastewater by a micron-size Fe⁰/O₃ process (mFe⁰/O₃)

et al. 2016

View full text Add to dashboard Cite

A micron-size Fe 0 /O 3 process (mFe 0 /O 3 ) was set up to mineralize the pollutants in ammunition wastewater, and its key operational parameters (e.g., initial pH, ozone flow rate, and mFe 0 dosage) were optimized by the batch experiments, respectively. Under the optimal conditions, COD removal efficiency obtained by the mFe 0 /O 3 process (i.e., 92.6% after 30 min treatment) was much higher than those of ozone alone (46.5%), mFe 0 alone (38.3%) or mFe 0 /air (58.5%), which confirm the synergetic effect between mFe 0 and ozone. In addition, the BOD 5 /COD (B/C) ratio was elevated from 0 to 0.54 after 30 min treatment by the mFe 0 /O 3 process, which indicates the significant improvement of biodegradability. Furthermore, the analysis results of the UV-vis and excitation-emission matrix (EEM) fluorescence spectra further confirm that the toxic and refractory pollutants in ammunition wastewater had been completely decomposed or transformed into smaller molecule organic compounds. Meanwhile, the superiority of the mFe 0 /O 3 process has been confirmed according the analysis results of COD removal, B/C ratio, UV-vis and EEM.Therefore, the mFe 0 /O 3 process could be proposed as a promising treatment technology for toxic and refractory ammunition wastewater.

show abstract

“…Additionally, copper covering on the iron surface accelerated the corrosion of ZVI and the generation of hydrogen ions ([H]) [41]. As the entire reaction occurred in an alkaline environment, iron corrosion products such as Fe(OH) 2 , Fe(OH) 3 , FeOOH, Fe 2 O 3 and Fe 3 O 4 or green rusts might be generated during the iron corrosion process and the contaminants could be eliminated to some extent through these corrosion products with adsorptive and agglomerate characteristics [42]. Moreover, the generation of these corrosion products might be enhanced by Cu catalysis and the adsorption and co-precipitation effect would be accordingly improved.…”

Section: Released Iron Ion Concentration In Effluentsmentioning

confidence: 99%

Application of Fe-Cu/Biochar System for Chlorobenzene Remediation of Groundwater in Inhomogeneous Aquifers

Zhang

Zhao

et al. 2017

Water

View full text Add to dashboard Cite

Chlorobenzene (CB), as a typical Volatile Organic Contaminants (VOC), is toxic, highly persistent and easily migrates in water, posing a significant risk to human health and subsurface ecosystems. Therefore, exploring effective approaches to remediate groundwater contaminated by CB is essential. As an enhanced micro-electrolysis system for CB-contaminated groundwater remediation, this study attempted to couple the iron-copper bimetal with biochar. Two series of columns using sands with different grain diameters were used, consisting of iron, copper and biochar fillings as the permeable reactive barriers (PRBs), to simulate the remediation of CB-contaminated groundwater in homogeneous and heterogeneous aquifers. Regardless of the presence of homogeneous or heterogeneous porous media, the CB concentrations in the effluent from the PRB columns were significantly lower than the natural sandy columns, suggesting that the iron and copper powders coupled with biochar particles could have a significant removal effect compared to the natural sand porous media in the first columns. CB was transported relatively quickly in the heterogeneous porous media, likely due to the fact that the contaminant residence time is proportional to the infiltration velocities in the different types of porous media. The average effluent CB concentrations from the heterogeneous porous media were lower than those from homogeneous porous media. The heterogeneity retarded the vertical infiltration of CB, leading to its extended lateral distribution. During the treatment process, benzene and phenol were observed as the products of CB degradation. The ultimate CB removal efficiency was 61.4% and 68.1%, demonstrating that the simulated PRB system with the mixture of iron, copper and biochar was effective at removing CB from homogeneous and heterogeneous aquifers.

show abstract

Effects of dissolved oxygen on dye removal by zero-valent iron

Cited by 114 publications

References 32 publications

Effect of magnetic field on the zero valent iron induced oxidation reaction

Effect of magnetic field on the zero valent iron induced oxidation reaction

Mineralization of ammunition wastewater by a micron-size Fe⁰/O₃ process (mFe⁰/O₃)

Application of Fe-Cu/Biochar System for Chlorobenzene Remediation of Groundwater in Inhomogeneous Aquifers

Contact Info

Product

Resources

About

Effects of dissolved oxygen on dye removal by zero-valent iron

Cited by 114 publications

References 32 publications

Effect of magnetic field on the zero valent iron induced oxidation reaction

Effect of magnetic field on the zero valent iron induced oxidation reaction

Mineralization of ammunition wastewater by a micron-size Fe0/O3 process (mFe0/O3)

Application of Fe-Cu/Biochar System for Chlorobenzene Remediation of Groundwater in Inhomogeneous Aquifers

Contact Info

Product

Resources

About

Mineralization of ammunition wastewater by a micron-size Fe⁰/O₃ process (mFe⁰/O₃)