Abstract
Benzene, toluene, and o-xylene (BTX) degradation by immobilized Pseudomonas putida F1 of postconsumer agave-fiber/polymer foamed-composites (AFPFC) and suspended cultures was studied under controlled conditions. Analyses using FTIR-ATR and SEM showed that P. putida F1 adhered onto the composite surface and developed a biofilm. In this sense, the AFPFC were successfully used as a support for bacterial immobilization. Both systems, immobilized and suspended cells of P. putida F1, were able to completely degrade benzene and toluene from initial concentrations of 15, 30, 60, and 90 mg l −1. An inhibitory effect of the intermediary catechol from benzene degradation was observed in suspended cultures but it was not presented in the immobilized system. The degradation of o-xylene was partially accomplished in both systems. The Monod equation was used to model the experimental data obtained from the biodegradation kinetics, and they were adequately described with this model.
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