Abstract
This study investigated Fenton and Fenton-like reactions at low iron concentration (≦10 mg l-1) to oxidize three commercial azo dyes, namely Red MX-5B, Reactive Black 5 and Orange G. In some local cases in Taiwan, wastewater color was found to be the only problem in meeting local effluent standards. This investigation reveals that both of these methods can remove the color of these dyes completely. Moreover they only produce little sludge in wastewater that meet local effluent standards and do not need to further treat. The effects of Fe2+, Fe3+, H2O2 and solution pH on dye decolorization are demonstrated in detail. The optimum pH for both Fenton and Fenton-like reactions in this study are about pH 2.5-3.0. Increasing the dose of ferric nitrate enhances the dye decolorization. The optimal levels of H2O2 required for the process are also examined. High levels of H2O2 appear to reduce dye decolorization. In addition, it is also found that decolorization of azo dyes undergoes a faster reaction rate than mineralization of azo dyes.
| Original language | English |
|---|---|
| Pages (from-to) | 1409-1414 |
| Number of pages | 6 |
| Journal | Chemosphere |
| Volume | 58 |
| Issue number | 10 |
| DOIs | |
| Publication status | Published - 2005 Mar 1 |
Fingerprint
All Science Journal Classification (ASJC) codes
- Environmental Engineering
- Environmental Chemistry
- Chemistry(all)
- Pollution
- Health, Toxicology and Mutagenesis
Cite this
}
Degradation of azo dyes using low iron concentration of Fenton and Fenton-like system. / Hsueh, C. L.; Huang, Yao-Hui; Wang, C. C.; Chen, Chuh-Yung.
In: Chemosphere, Vol. 58, No. 10, 01.03.2005, p. 1409-1414.Research output: Contribution to journal › Article
TY - JOUR
T1 - Degradation of azo dyes using low iron concentration of Fenton and Fenton-like system
AU - Hsueh, C. L.
AU - Huang, Yao-Hui
AU - Wang, C. C.
AU - Chen, Chuh-Yung
PY - 2005/3/1
Y1 - 2005/3/1
N2 - This study investigated Fenton and Fenton-like reactions at low iron concentration (≦10 mg l-1) to oxidize three commercial azo dyes, namely Red MX-5B, Reactive Black 5 and Orange G. In some local cases in Taiwan, wastewater color was found to be the only problem in meeting local effluent standards. This investigation reveals that both of these methods can remove the color of these dyes completely. Moreover they only produce little sludge in wastewater that meet local effluent standards and do not need to further treat. The effects of Fe2+, Fe3+, H2O2 and solution pH on dye decolorization are demonstrated in detail. The optimum pH for both Fenton and Fenton-like reactions in this study are about pH 2.5-3.0. Increasing the dose of ferric nitrate enhances the dye decolorization. The optimal levels of H2O2 required for the process are also examined. High levels of H2O2 appear to reduce dye decolorization. In addition, it is also found that decolorization of azo dyes undergoes a faster reaction rate than mineralization of azo dyes.
AB - This study investigated Fenton and Fenton-like reactions at low iron concentration (≦10 mg l-1) to oxidize three commercial azo dyes, namely Red MX-5B, Reactive Black 5 and Orange G. In some local cases in Taiwan, wastewater color was found to be the only problem in meeting local effluent standards. This investigation reveals that both of these methods can remove the color of these dyes completely. Moreover they only produce little sludge in wastewater that meet local effluent standards and do not need to further treat. The effects of Fe2+, Fe3+, H2O2 and solution pH on dye decolorization are demonstrated in detail. The optimum pH for both Fenton and Fenton-like reactions in this study are about pH 2.5-3.0. Increasing the dose of ferric nitrate enhances the dye decolorization. The optimal levels of H2O2 required for the process are also examined. High levels of H2O2 appear to reduce dye decolorization. In addition, it is also found that decolorization of azo dyes undergoes a faster reaction rate than mineralization of azo dyes.
UR - http://www.scopus.com/inward/record.url?scp=15944378177&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=15944378177&partnerID=8YFLogxK
U2 - 10.1016/j.chemosphere.2004.09.091
DO - 10.1016/j.chemosphere.2004.09.091
M3 - Article
C2 - 15686759
AN - SCOPUS:15944378177
VL - 58
SP - 1409
EP - 1414
JO - Chemosphere
JF - Chemosphere
SN - 0045-6535
IS - 10
ER -