Simultaneous removal of chlorothalonil and nitrate by Bacillus cereus strain NS1.
Elevated NO3- and chlorothalonil (CTN) have been found in production nursery recycling ponds. Bacillus cereus strain NS1 isolated from nursery recycling pond sediment was assessed for its ability to reduce NO3- and degrade CTN in a mineral medium. The results showed that the efficiency of NO3- reduction and CTN degradation by B. cereus strain NS1 were related to the nature of organic carbon sources added to the medium. In the medium amended with 100 mg/L yeast extract, 86% of NO3- (100 mg/L) and 99% of CTN (78 microg/L) were simultaneously removed by B. cereus strain NS1 during the first day of the experiment. It took 6 days for the removal of 82-93% of NO3- and 87-91% of CTN in the media containing glucose and acetate. B. cereus strain NS1 needed organic carbon as energy sources and electron donors to respire NO3-, and simultaneously degrade CTN. These results suggest that B. cereus strain NS1 may have great potential to remediate NO3- and CTN contaminated water in nursery recycling ponds.
Zhang
Yiqiang
Y
Department of Environmental Sciences, University of California, Riverside, Riverside, CA-92521, USA. yqzhang@ucr.edu
Lu
Jianhang
J
Wu
Laosheng
L
Chang
Andrew
A
Frankenberger
William T
WT
D000383:Agriculture / Q000379:methods; D001409:Bacillus cereus / Q000378:metabolism*; D001673:Biodegradation, Environmental; D005659:Fungicides, Industrial / Q000032:analysis / Q000378:metabolism*; D009566:Nitrates / Q000378:metabolism*; D009570:Nitriles / Q000032:analysis / Q000378:metabolism*; D010084:Oxidation-Reduction; D014867:Water / Q000737:chemistry; D014874:Water Pollutants, Chemical / Q000378:metabolism*; D018508:Water Purification / Q000379:methods
D005659:Fungicides, Industrial; D009566:Nitrates; D009570:Nitriles; D014874:Water Pollutants, Chemical; D014867:Water; C005806:tetrachloroisophthalonitrile