Please use this identifier to cite or link to this item: http://ir.mu.ac.ke:8080/jspui/handle/123456789/5399
Title: Degradation of methyl orange by ozone in the presence of ferrous and persulfate ions in a rotating packed bed
Authors: Ge, Deming
Zeng, Zequan
Arowo, Moses NyoTonglo
Zou, Haikui
Keywords: Ozone
Ferrous ion
Methyl orange
Rotating packed bed
Issue Date: 2015
Publisher: Elsevier
Abstract: This work investigated the degradation of methyl orange by ozone in the presence of ferrous and persulfate ions () in a rotating packed bed. The effects of various operating parameters such as initial pH, rotational speed, gas–liquid ratio, ozone inlet concentration and reaction temperature on the degradation rate of methyl orange were studied with an aim to optimize the operation conditions. Results reveal that the degradation rate increased with an increase in rotational speed, gas–liquid ratio and ozone inlet concentration, and reached a maximum at 25 °C and initial pH 4. Contrast experiments involving ozone and ferrous ions (O3/Fe2+) were also carried out, and the results show approximately 10% higher degradation rate and COD removal in the process than in the O3/Fe2+ process. Additionally, the intermediates of the degradation process were analyzed to ascertain the degradation products.
URI: https://doi.org/10.1016/j.chemosphere.2015.12.058
http://ir.mu.ac.ke:8080/jspui/handle/123456789/5399
Appears in Collections:School of Engineering

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