Publication Date:
2014-11-25
Description:
The simultaneous removal of sulfide and p -cresol was carried out by using a marine-denitrifying consortium collected in the coastal zone of Sonora, Mexico. Different experimental conditions were used to evaluate the capacity of the consortium to simultaneously eliminate nitrate, sulfide, and p -cresol. For instance, the first set of assays was conducted at different sulfide concentrations (20, 50, and 100 mg S 2− L −1 ), with a fixed concentration of p -cresol (45 mg C L −1 ). The second set of assays was developed at different concentrations of p -cresol (45, 75, and 100 mg C L −1 ), in the presence of 20 mg S 2− L −1 . In all cases, the concentration of nitrate was stoichiometrically added for the complete oxidization of the substrates. The results showed removal efficiencies up to 92% for p -cresol and nitrate at 20 and 50 mg S 2− L −1 ; whereas at 100 mg S 2− L −1 removal efficiencies were 77% and 59% for p -cresol and nitrate, respectively. On the other hand, sulfide (20 mg L −1 ) was completely removed under different concentrations of p -cresol tested, with a partial accumulation of nitrite according to the increment of p -cresol concentration. The results obtained indicate that the marine consortium was able to simultaneously remove the pollutants studied.
Print ISSN:
0233-111X
Electronic ISSN:
1521-4028
Topics:
Biology
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