Removal and toxicity reduction of naphthenic acids by ozonation and combined ozonation-aerobic biodegradation.


A commercial naphthenic acids (NAs) mixture (TCI Chemicals) and five model NA compounds were ozonated in a semibatch mode. Ozonation of 25 and 35 mg/L NA mixture followed pseudo first-order kinetics (k(obs)=0.11±0.008 min(-1); r(2)=0.989) with a residual NAs concentration of about 5 mg/L. Ozone reacted preferentially with NAs of higher cyclicity and… (More)
DOI: 10.1016/j.biortech.2014.12.058


7 Figures and Tables