Abstract
Abstract The efficiency of methods to reduce the pollution induced by dyes is often evaluated using a color change measurement. This approach might hide complex mechanisms, that, if neglected, can lead to inadequate design of treatment units. This paper highlights this complexity on the case of Remazol Brilliant Blue R (RBBR), an industrial anthraquinone dye, degraded using Trametes versicolor laccases. A kinetic model describing the degradation of RBBR and the formation of degradation byproducts, one of which was found to have an orange color, is proposed. The complex links between RBBR degradation and the decolorization of the medium are highlighted, allowing to identify limits to the degradation achievable by the laccases in this case.
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