Removal of sulfur-containing organic molecules adsorbed on inorganic supports by Rhodococcus Rhodochrous spp.

P. Carvajal, M. Alejandro Dinamarca, P. Baeza, E. Camú, J. Ojeda

Research output: Contribution to journalArticlepeer-review

8 Scopus citations

Abstract

Objective: To remove dibenzothiophene (DBT) and 4,6-dimethyl-dibenzothiophene (4,6-DMDBT) adsorbed on alumina, silica and sepiolite through biodesulfurization (BDS) using Rhodococcus Rhodochrous spp., that selectively reduce sulfur molecules without generating of gaseous pollutants. Results: The adsorption of DBT and 4,6-DMDBT was affected by the properties of the supports, including particle size and the presence of surface acidic groups. The highest adsorption of both sulfur-containing organic molecules used particle sizes of 0.43–0.063 mm. The highest percentage removal was with sepiolite (80 % for DBT and 56 % for 4,6-DMDBT) and silica (71 % for DBT and 37 % for 4,6-DMDBT). This is attributed to the close interaction between these supports and the bacteria. Conclusions: Biodesulfurization is effective for removing the sulfur-containing organic molecules adsorbed on inorganic materials and avoids the generation of gaseous pollutants.

Original languageEnglish
Pages (from-to)241-245
Number of pages5
JournalBiotechnology Letters
Volume39
Issue number2
DOIs
StatePublished - 1 Feb 2017
Externally publishedYes

Keywords

  • Adsorption
  • Biodesulfurization
  • Inorganic supports
  • Rhodococcus rhodochrous
  • Sulfur-containing organic molecules

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