scholarly journals Degradation of Orange I by the zero-valent iron/hydrogen peroxide system

2020 ◽  
Vol 546 ◽  
pp. 042035
Author(s):  
Jian Zhou ◽  
Meifang Hou
Keyword(s):  
Hydrogen Peroxide ◽  
Zero Valent Iron

scholarly journals Heterogeneous Fenton-Like Catalytic Degradation of 2,4-Dichlorophenoxyacetic Acid by Nano-Scale Zero-Valent Iron Assembled on Magnetite Nanoparticles

Water ◽  
2020 ◽  
Vol 12 (10) ◽  
pp. 2909 ◽  
Author(s):  
Xiaofan Lv ◽  
Yiyang Ma ◽  
Yangyang Li ◽  
Qi Yang
Keyword(s):  
Hydrogen Peroxide ◽  
Synergistic Effects ◽  
Degradation Process ◽  
Zero Valent Iron ◽  
Dichlorophenoxyacetic Acid ◽  
Heterogeneous Fenton ◽  
Reaction Conditions ◽  
Nano Zero Valent Iron ◽  
2,4 Dichlorophenoxyacetic Acid ◽  
Better Than

Fe0@Fe3O4 nanoparticles with dispersibility and stability better than single nano zero-valent iron (nZVI) were synthesized and combined with hydrogen peroxide to constitute a heterogeneous Fenton-like system, which was creatively applied in the degradation of 2,4-dichlorophenoxyacetic acid (2,4-D). The effects of different reaction conditions like pH, hydrogen peroxide concentration, temperature, and catalyst dosage on the removal of 2,4-D were evaluated. The target pollutant was completely removed in 90min; nearly 66% of them could be mineralized, and the main intermediate product was 2,4-dichlorophenol. Synergistic effects between nZVI and Fe3O4 made the 2,4-D degradation efficiency in the Fe0@Fe3O4/H2O2 system greater than in either of them alone. More than a supporter, Fe3O4 could facilitate the degradation process by releasing ferrous and ferric ions from the inner structure. The reduction of 2,4-D was mainly attributed to hydroxyl radicals including surface-bound ∙OH and free ∙OH in solution and was dominated by the former. The possible mechanism of this Fe0@Fe3O4 activated Fenton-like system was proposed.

Phenol degradation using hydroxyl radicals generated from zero-valent iron and hydrogen peroxide

2006 ◽  
Vol 63 (1-2) ◽  
pp. 15-19 ◽  
Author(s):  
David H. Bremner ◽  
Arthur E. Burgess ◽  
Didier Houllemare ◽  
Kyu-Cheol Namkung
Keyword(s):  
Hydrogen Peroxide ◽  
Hydroxyl Radicals ◽  
Phenol Degradation ◽  
Zero Valent Iron

scholarly journals Hydrogen Peroxide/Zero Valent Iron/Persulfate Approach for Dye Degradation: Key Operating Parameter and Synergistic Effect

2021 ◽  
Author(s):  
Mehdi Ahmadi ◽  
rozhan feizi
Keyword(s):  
Hydrogen Peroxide ◽  
Dye Degradation ◽  
Operating Parameter ◽  
Zero Valent Iron ◽  
Reusable Catalyst ◽  
Aqueous Environment ◽  
Order Kinetic ◽  
Operational Parameters ◽  
Sunset Yellow ◽  
Solution Ph

Abstract Azo dyes due to the presence of benzene ring, toxicity, mutagenicity, carcinogenicity and low biodegradability have become a major problem in the aqueous environment. In this study, Zero Valent Iron (ZVI) was employed as a catalyst to activate persulfate (PS) and hydrogen peroxide (H2O2) for removal of Sunset Yellow (SY) from aqueous solutions using integrated H2O2/ZVI/PS process. The effects of operational parameters (solution pH, H2O2 concentration, PS concentration, and ZVI dose) were studied on SY removal. According to the results, about 100% efficiency was obtained by the H2O2/ZVI/PS for dye removal at: pH = 3, ZVI 50 mg/L, 1 mM H2O2 concentration, 1 mM PS concentration, and 30 min reaction time. The kinetic study implied that the H2O2/ZVI/PS process followed the first-order kinetic model. The total organic carbon (TOC) test showed that about 65% of mineralization was achieved after 30 min. Moreover, the ZVI particles showed a suitable efficiency after five cycles, and hence, it can be used as an eco-friendly, cost effective and reusable catalyst for the treatment of wastewaters contaminated with such dyes.

scholarly journals Removal of nitrate from water by acid-washed zero-valent iron/ferrous ion/hydrogen peroxide: influencing factors and reaction mechanism

2017 ◽  
Vol 77 (2) ◽  
pp. 525-533 ◽  
Author(s):  
Yongye Li ◽  
Fenglian Fu ◽  
Zecong Ding
Keyword(s):  
Hydrogen Peroxide ◽  
Reaction Mechanism ◽  
Photoelectron Spectroscopy ◽  
Nitrate Reduction ◽  
Nitrate Removal ◽  
Zero Valent Iron ◽  
Ferrous Ion ◽  
Combined System ◽  
X Ray ◽  
Before And After

Abstract In this paper, a system consisting of acid-washed zero-valent iron (ZVI), ferrous ion (Fe2+), and hydrogen peroxide (H2O2) was employed for the removal of nitrate (NO3−) from water, and the reaction mechanism for this is discussed. The effects of acid-washed ZVI, Fe2+, H2O2, and initial NO3− concentration on nitrate removal were investigated. Acid-washed ZVI before and after reaction with nitrate were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). Results reveal that the combined system can enhance the corrosion of ZVI and facilitate aqueous nitrate reduction. The products of nitrate reduction are mainly ammonium, with some N2. The ZVI particles after reaction may have a core of ZVI with an oxidation layer mainly consisting of Fe3O4.

Persulfate and Hydrogen Peroxide-Activated Degradation of Bisphenol A with Nano-scale Zero-valent Iron and Aluminum

2016 ◽  
Vol 19 (2) ◽  
Author(s):  
Merve Dogan ◽  
Tugce Ozturk ◽  
Tugba Olmez-Hanci ◽  
Idil Arslan-Alaton
Keyword(s):  
Hydrogen Peroxide ◽  
Bisphenol A ◽  
Zero Valent Iron ◽  
Nano Scale ◽  
Nanoscale Zero Valent Iron

AbstractIn the present study, hydrogen peroxide (HP) and persulfate (PS)-activated nanoscale zero-valent iron (nZVI) and zero-valent aluminum (nZVAl) heterogeneous treatment systems (nZVI/HP-PS and nZVAl/HP-PS) were investigated for the removal of 20 mg/L (88 μM) aqueous Bisphenol A (BPA). Oxidation with HP and PS in the absence of nanoparticles did not cause BPA degradation, whereas the nZVI/O

Enhanced As(III) oxidation and removal by combined use of zero valent iron and hydrogen peroxide in aerated waters at neutral pH values

2015 ◽  
Vol 297 ◽  
pp. 1-7 ◽  
Author(s):  
Ioannis A. Katsoyiannis ◽  
Andreas Voegelin ◽  
Anastasios I. Zouboulis ◽  
Stephan J. Hug
Keyword(s):  
Hydrogen Peroxide ◽  
Zero Valent Iron ◽  
Ph Values ◽  
Neutral Ph ◽  
Combined Use
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