Inhibiting action of chloro- and nitro-phenols on biodegradation of phenol: A structure-toxicity relationship

All chlorophenols and six mono- and di-nitrophenols were tested, by discontinuous kinetic measurements, as inhibitors of the phenol degradation by activated sludge. The measured values of pI₅₀ were correlated with structural properties (logP, ?σ) of the substituted phenols, developing a QSAR.