Removal of color and COD from a mixture of four reactive azo dyes using fenton oxidation process.
J Environ Sci Health A Tox Hazard Subst Environ Eng
; 38(10): 2241-50, 2003.
Article
in En
| MEDLINE
| ID: mdl-14524678
ABSTRACT
This study was designed to decolorize and to reduce COD content in a mixture of four reactive dyes, i.e., Remazol Black 5 (RB5), Remazol Red RB (RR), Remazol Yellow 84 (RY), Remazol Brilliant Blue (RB) using Fenton Oxidation Process (FOP). Optimum pH, temperature, and the doses of FeSO4 and H2O2 were determined. Experiments were conducted on the samples containing a total concentration of 100 mgL(-1) (RB+RY), 200 mg L(-1) (RB5+RR), 300 mg L(-1) (RB5+RR+RB+ RY), and 400 mg L(-1) (RR+RB+RY) dyes considering their actual application doses in dyehouses. Optimum pH was observed as 2.5 at 30 degrees C using 400 mg L(-1) FeSO4 and 800 mg L(-1) of H2O2 resulting in more than 96% COD and 99% Pt-Co unit of color removal for the mixture of RB5 and RR. The optimum conditions determined were 4.0 pH, 50 degrees C, and 500 mg L(-1) FeSO4 applying 1000 mg L(-1) H2O2 for the mixture of (RB5+RR+RB+RY). A 100 mg L(-1) solution of a mixture of RB and RY at equal amounts was oxidized using 200 mg L(-1) FeSO4 and 300 mg L(-1) H2O2 at 3.0 pH and 50 degrees C.
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Collection:
01-internacional
Database:
MEDLINE
Main subject:
Azo Compounds
/
Water Pollutants, Chemical
/
Water Purification
/
Coloring Agents
Language:
En
Journal:
J Environ Sci Health A Tox Hazard Subst Environ Eng
Journal subject:
TOXICOLOGIA
Year:
2003
Document type:
Article
Affiliation country:
Turkey