Biodegradation of p‐cresol and sulfide removal by a marine‐denitrifying consortium. (24th November 2014)

• Record Type: Journal Article
• Authors: Meza‐Escalante, Edna R.; Alvarez, Luis H.; Serrano, Denisse; Mendoza, Erika; Bonola, Ramsés
• Is Part Of: Journal of basic microbiology. Volume 55:issue 2(2015:Feb.)
• Page Start: 180
• Page End: 185
• Publication Date: 2014-11-24
• Subjects: Microbiology -- Periodicals; 579
• DOI: 10.1002/jobm.201400464
• Languages: English
• ISSNs: 0233-111X

Abstract

<abstract abstract-type="main" xml:lang="en"> <title>Abstract</title> <sec id="jobm201400464-sec-0001" sec-type="section"> <p>The simultaneous removal of sulfide and <italic>p</italic>‐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 <italic>p</italic>‐cresol. For instance, the first set of assays was conducted at different sulfide concentrations (20, 50, and 100 mg S<sup>2−</sup> L<sup>−1</sup>), with a fixed concentration of <italic>p</italic>‐cresol (45 mg C L<sup>−1</sup>). The second set of assays was developed at different concentrations of <italic>p</italic>‐cresol (45, 75, and 100 mg C L<sup>−1</sup>), in the presence of 20 mg S<sup>2−</sup> L<sup>−1</sup>. 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 <italic>p</italic>‐cresol and nitrate at 20 and 50 mg S<sup>2−</sup> L<sup>−1</sup>; whereas at 100 mg S<sup>2−</sup> L<sup>−1</sup> removal efficiencies were 77% and 59% for <italic>p</italic>‐cresol and nitrate, respectively. On the other hand, sulfide (20 mg L<sup>−1</sup>) was completely removed under different concentrations of <italic>p</italic>‐cresol tested, with a partial accumulation of nitrite according to the increment of <italic>p</italic>‐cresol concentration. The results obtained indicate that the marine consortium was able to simultaneously remove the pollutants studied.</p> </sec> </abstract>