F Biological methodologies. Some substances are bio- resistant, while photocatalysis is not specific for parti- cular substrates.
F It has been investigated the possibility to couple biological methods with some photochemical methods.
F Some pollutants, as for instance metobromuron and isoproturon (herbicides) and AMBI (5-amino-6-methyl- 2-benzimidazolone, used in the manufacture of dyes), are biorecalcitrant molecules.1-3
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