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Decolorisation and mineralisation of CI Reactive Black 8 by the Fenton and ultrasound/Fenton methods
Author(s) -
Zhang Hui,
Zhang Yi,
Zhang Daobin
Publication year - 2007
Publication title -
coloration technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.297
H-Index - 49
eISSN - 1478-4408
pISSN - 1472-3581
DOI - 10.1111/j.1478-4408.2007.00069.x
Subject(s) - hydrogen peroxide , chemical oxygen demand , ferrous , chemistry , oxygen , reagent , fenton's reagent , irradiation , reactive oxygen species , nuclear chemistry , fenton reaction , wastewater , waste management , organic chemistry , biochemistry , physics , nuclear physics , engineering
The effects of pH, ferrous ion and hydrogen peroxide dosage on the decolorisation and mineralisation of CI Reactive Black 8 by the Fenton process with/without ultrasonic irradiation were investigated. It was verified that the presence of ultrasonic irradiation did not enhance the decolorisation of CI Reactive Black 8 significantly by Fenton's reagents, but it enhanced the chemical oxygen demand removal efficiency. The enhancement was more pronounced for lower (<0.89 mm) or higher (>1.78 mm) ferrous ion dosage. The optimal pH for chemical oxygen demand removal was 3.0. Chemical oxygen demand removal efficiency increased with the increasing H 2 O 2 dosage and reached the highest level at 5.88 mm, but further increase in H 2 O 2 dosage would not increase removal efficiency significantly.