Remediation of organic arsenic contaminants with heterogeneous Fenton process mediated by SiO2-coated nano zero-valent iron

2020 ◽  
Vol 27 (11) ◽  
pp. 12017-12029 ◽  
Author(s):  
Yuancai Lv ◽  
Siyi Huang ◽  
Guofu Huang ◽  
Yifan Liu ◽  
Guifang Yang ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Nano Zero Valent Iron ◽  
Organic Arsenic

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.

scholarly journals Applicability of nano zero valent iron (nZVI) in sono – Fenton process

2014 ◽  
Vol 495 ◽  
pp. 012010 ◽  
Author(s):  
M R Taha ◽  
A H Ibrahim ◽  
R C Amat ◽  
A W Azhari
Keyword(s):  
Zero Valent Iron ◽  
Fenton Process ◽  
Nano Zero Valent Iron

scholarly journals Heterogeneous Fenton Degradation of Patulin in Apple Juice Using Carbon-Encapsulated Nano Zero-Valent Iron (CE-nZVI)

Foods ◽  
2020 ◽  
Vol 9 (5) ◽  
pp. 674
Author(s):  
Notemba Silwana ◽  
Blanca Calderón ◽  
Seteno Karabo Obed Ntwampe ◽  
Andrés Fullana
Keyword(s):  
Apple Juice ◽  
Fruits And Vegetables ◽  
Spherical Shape ◽  
Fenton Oxidation ◽  
Zero Valent Iron ◽  
Penicillium Expansum ◽  
Heterogeneous Fenton ◽  
Average Percentage ◽  
Water Matrix ◽  
Nano Zero Valent Iron

Patulin (PAT), a mycotoxin found mainly in matured apples, is produced by different species of fungi, mainly Penicillium expansum, and is found in various fruits and vegetables used to produce juice. Little focus has been placed on nano-technological methods for the mitigation of this problem. In this work, carbon-encapsulated nano-zero valent iron (CE-nZVI) particles were synthesized and used as heterogeneous Fenton agents for the degradation of PAT in apple juice. The particles were found to have a spherical shape with a diameter of 130 ± 50 nm. In a heterogeneous Fenton degradation (involving CE-nZVI) process, a concentration of 0.05 g/L CE-nZVI with 0.5 mM H2O2 was used. Since the Fenton oxidation process is pH-dependent, placebo degradation was observed at varying pH conditions with an average percentage of PAT degradation of 27.8%, 87.0%, 98.0%, and 99.75% at pH 6, 5, 4.5, and 3.5 respectively, between 1 min to 4 h in a water matrix. In a juice matrix, at the regular pH of juice (3.6), percentage PAT degradation of 72% and 89% was obtained after a 2-h treatment using heterogeneous Fenton oxidation (CE-nZVI/H2O2) systems, using 0.5 mM H2O2 and 1 mM H2O2, respectively.

Nano Zero Valent Iron Composites for Water Decontamination: A Review

2018 ◽  
Vol 5 (2) ◽  
pp. 88-101
Author(s):  
Nivedita Shukla ◽  
Amit Saxena ◽  
Vatsana Gupta ◽  
Ashok Singh Rawat ◽  
Sarita Shrivastava ◽  
...  
Keyword(s):  
Zero Valent Iron ◽  
Water Decontamination ◽  
Nano Zero Valent Iron

scholarly journals Impact of phosphate adsorption on the mobility of PANI‐supported nano zero‐valent iron

2021 ◽  
Author(s):  
Dantong Lin ◽  
Scott Bradford ◽  
Liming Hu ◽  
Irene M. C. Lo
Keyword(s):  
Zero Valent Iron ◽  
Phosphate Adsorption ◽  
Nano Zero Valent Iron
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