Open AccessKinetic Analysis for Biodesulfurization of Dibenzothiophene using R. rhodochrous Adsorbed on Silica
Author(s) -
Carla V. Valenzuela,
Johanna Eyzaguirre,
P. Baeza,
Paulina Aballay,
J. Ojeda
Publication year - 2018
Publication title -
ecological chemistry and engineering. s
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.283
H-Index - 21
eISSN - 2084-4549
pISSN - 1898-6196
DOI - 10.1515/eces-2018-0036
Subject(s) - dibenzothiophene , rhodococcus rhodochrous , adsorption , chemical engineering , kinetic energy , rhodococcus , chemistry , sulfur , chromatography , materials science , organic chemistry , enzyme , physics , quantum mechanics , engineering
Experimental biodesulfurization (BDS) data for dibenzothiophene (DBT) (1.0-7.0 mM) with Rhodococcus rhodochorus immobilized by adsorption on silica, were adjusted with liquid-film kinetic model (Fisher coefficient, F = 592.74 and probability value p << 0.05 and r 2 = 0.97). Simulations predict the presence of considerable amounts of DBT surrounding the particles, which would be available for the cells adsorbed on the surface of silica. The greatest percentage removal (50 %) was obtained for adsorbed cell system over the suspended bacterial cells (30 %), showing that sulfur substrates are more bioavailable when the bacterial cells are adsorbed on silica. The liquid-film modelling with diffusional effects provides proper theoretical basis to explain the BDS performance obtained using adsorbed cells.