# Fluidized-bed Fenton-like oxidation of a textile dye using natural magnetite

Fluidized-bed Fenton-like oxidation of a textile dye using natural magnetite Degradation of Acid Orange 7 (AO7) as a model azo dye was investigated in a recirculating pilot fluidized-bed reactor by a Fenton-like process using natural magnetite (NM) and potassium persulfate (K2S2O8). Scanning electron microscopy was performed to characterize the magnetite sample. The heterogeneous Fenton-like process (NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - ) is a modified method owing to its enhanced mass transfer. It can be operated reliably and simply by reducing the produced iron oxide sludge in the conventional Fenton process. Degradation efficiency (DE %) of AO7 by NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - process was affected by operational parameters. The DE % of 75 % was obtained for the AO7 treatment (15 mg/L) at the desired conditions, such as pH 5, 0.2 mM $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - , and 0.5 g/L NM after 120 min of reaction time. The dye degradation rate in all the experiments followed the pseudo-second-order kinetic with high correlation coefficients (R 2 ≥ 0.98). The low released iron concentration, successive reusability at milder pH and the recirculation mode with the proper mixing are the significant advantages of the NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - process. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Research on Chemical Intermediates Springer Journals

# Fluidized-bed Fenton-like oxidation of a textile dye using natural magnetite

, Volume 42 (12) – May 26, 2016
13 pages

/lp/springer_journal/fluidized-bed-fenton-like-oxidation-of-a-textile-dye-using-natural-kBJoBfttLO
Publisher
Springer Netherlands
Subject
Chemistry; Catalysis; Physical Chemistry; Inorganic Chemistry
ISSN
0922-6168
eISSN
1568-5675
D.O.I.
10.1007/s11164-016-2580-1
Publisher site
See Article on Publisher Site

### Abstract

Degradation of Acid Orange 7 (AO7) as a model azo dye was investigated in a recirculating pilot fluidized-bed reactor by a Fenton-like process using natural magnetite (NM) and potassium persulfate (K2S2O8). Scanning electron microscopy was performed to characterize the magnetite sample. The heterogeneous Fenton-like process (NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - ) is a modified method owing to its enhanced mass transfer. It can be operated reliably and simply by reducing the produced iron oxide sludge in the conventional Fenton process. Degradation efficiency (DE %) of AO7 by NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - process was affected by operational parameters. The DE % of 75 % was obtained for the AO7 treatment (15 mg/L) at the desired conditions, such as pH 5, 0.2 mM $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - , and 0.5 g/L NM after 120 min of reaction time. The dye degradation rate in all the experiments followed the pseudo-second-order kinetic with high correlation coefficients (R 2 ≥ 0.98). The low released iron concentration, successive reusability at milder pH and the recirculation mode with the proper mixing are the significant advantages of the NM/ $${\text{S}}_{2} {\text{O}}_{8}^{2 - }$$ S 2 O 8 2 - process.

### Journal

Research on Chemical IntermediatesSpringer Journals

Published: May 26, 2016

## You’re reading a free preview. Subscribe to read the entire article.

### DeepDyve is your personal research library

It’s your single place to instantly
that matters to you.

over 12 million articles from more than
10,000 peer-reviewed journals.

All for just $49/month ### Explore the DeepDyve Library ### Unlimited reading Read as many articles as you need. Full articles with original layout, charts and figures. Read online, from anywhere. ### Stay up to date Keep up with your field with Personalized Recommendations and Follow Journals to get automatic updates. ### Organize your research It’s easy to organize your research with our built-in tools. ### Your journals are on DeepDyve Read from thousands of the leading scholarly journals from SpringerNature, Elsevier, Wiley-Blackwell, Oxford University Press and more. All the latest content is available, no embargo periods. ### DeepDyve Freelancer ### DeepDyve Pro Price FREE$49/month

\$360/year
Save searches from Google Scholar, PubMed
Create lists to organize your research
Export lists, citations