Abstract
ABSTRACT Biodegradation of 1-naphthol by a pure culture was measured in the presence (65 mg C L−1) and absence of a forest soil humic acid (HA). Experiments were performed under nongrowth conditions and controlled ionic strength (I equivalent to 10 mM LiCl) at pH 8.0. 1-Naphthol was allowed to react with HA under aerobic conditions in the dark for 7 days to promote sorption prior to bacterial inoculation. During this abiotic sorption period, 3.7–12% of 1-naphthol was transformed into oxidative products (naphthoquinones). At low initial 1-naphthol concentrations ( 9.0 mg L−1) with or without HA. Both abiotic and biotic 1-naphthol transformation pathways accumulated similar products, and these products were more recalcitrant than 1-naphthol. The sorption ...
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