Characterization of atrazine degradation and nitrate reduction by Pseudomonas sp. strain ADP

Abstract

Concomitant atrazine degradation and nitrate reduction by a pure culture of Pseudomonas sp. strain ADP were studied. Under anoxic conditions, Ps ADP grew well and degraded atrazine efficiently in the presence of nitrate. Similar atrazine degradation rates were observed under both anoxic and aerobic conditions: 30.7±2.83 and 36.2±0.44 mg atrazine g −1 cell h −1, respectively. A high denitrification rate of 90.8±8.22 mg NO 3 −-N g −1 cell h −1 was also observed using Ps ADP with citrate as the electron donor. The required citrate to nitrate ratio for complete denitrification was 5.11±0.15 g citrate g −1 NO 3 −-N.