Fungal degradation

Unlike polyaromatic hydrocarbons (PAHs) and some pharmaceuticals, fungal degradation of UV filters and, by extension, of most of the personal care products compounds is not extensively studied. 

Fungal degradation of BP1 resulted in the formation of 4HB and 4DHB. The levels of these metabolites found after 3 and 6 days of treatment were similar to those achieved in BP3 degradation experiments. Likewise in BP3 degradation tests, THB and DHMB were not detected in any of the collected samples. The levels found of these metabolites were quite low therefore, these products cannot be considered as major degradation products. 

Fungal degradation of these mixtures in aqueous phase was carried out under the same conditions as deca-BDE degradation experiments performed previously, except for the initial mixture concentration, which was 5 mg L 1 for both mixtures, and the extension of the degradation period, which corresponded to 14.5 days in both cases. 

M. Adosinda, M. Martins, N. Lima, A.J.D. Silvestre and M.J. Queiroz, Comparative studies of fungal degradation of single or mixed bioaccessible reactive azo dyes. Chemosphere, 52 (2003) 967-973. 

A. Conneely, W.F. Smyth and G. McMullan, Study of the white-rot fungal degradation of selected phtalocyanine dyes by capillary electrophoresis and liquid chromatography. Anal. 

Militz, H., Son, D.W., Gomez-Hemandez, L. and Sierra-Alvarez, R. (2003). Effect of fungal degradation on the chemical composition of acetylated beech wood. International Research Group on Wood Preservation, Doc. No. IRGAVP 03-40267. 

Ritschkoff, A.C., Ratio, M., Nurmi, A., Kokko, H., Rapp, A. and Militz, H. (1999). Effect of some resin treatments on fungal degradation reactions. International Research Gronp on Wood Preservation, Doc. No. IRG/WP 99-10318. 

Quinone/Hydroquinone Formation. In studies on biodegradation of lignin models with ligninolytic cultures of P. chrysosporium (and other fungi), a number of quinones and hydroquinones were isolated. In other studies their formation has been implied from the isolation of their structural counterparts (29,30), where rapid fungal degradation of the quinones prevented their isolation. Various routes to these metabolic intermediates exist, which have been extensively reviewed (26,27). 

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