Chemical and Materials Engineering Vol. 2(1), pp. 14 - 23
DOI: 10.13189/cme.2014.020103
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Plasma-Chemical and Photo-Catalytic Degradation of Bromophenol Blue


Serge Alain Djepang 1, Samuel Laminsi 1,*, Estella Njoyim-Tamungang 1, Cedrik Ngnintedem 1, Jean-Louis Brisset 2
1 Inorganic Chemistry Department, University of Yaoundé I, P.O. Box 812, Yaoundé, Cameroon
2 University of Rouen, 76821 Mont Saint-Aignan, France

ABSTRACT

The acid and oxidizing properties of a non-thermal plasma in humid air (e.g., a gliding arc device) have been investigated in the degradation of aqueous solutions of bromophenol blue. The plasma treatment was coupled with TiO2 as a photocatalyst with and without oyster shell powder for acidity control. The degradation kinetics were studied under various conditions such as treatment times, concentration of solution, type and concentration of catalyst. The removal of the dye was carried out with and without TiO2 and oyster shell: maximum degradation was attained for 20 min of treatment at an initial pH=2.4 for 3 g.L-1 TiO2 concentration (61.21%) and 0.4 g.L-1 Oyster shell concentration (28.48%). Temporal post-discharge phenomena induced by the plasma treatment are also observed, which are both ascribed to species formed in the discharge (i.e...respectively H2O2 or NOx derivatives). After daily post-discharge studies for one week, the removal efficiencies ranged from 61.21% up to 82.05% in the case of TiO2 and oyster shell gives 70.9% for the same period.

KEYWORDS
Gliding Arc Plasma, Bromophenol Blue, Titanium Oxide, Oyster Shell, Temporal Post-Discharge

Cite this paper
Serge Alain Djepang , Samuel Laminsi , Estella Njoyim-Tamungang , Cedrik Ngnintedem , Jean-Louis Brisset (2014). Plasma-Chemical and Photo-Catalytic Degradation of Bromophenol Blue. Chemical and Materials Engineering, 2 , 14 - 23. doi: 10.13189/cme.2014.020103.