Enhanced Biotransformation of Dinitrotoluene by Mediator-Functionalized Polypyrrole Composites

Abstract:

The continuous dosing and discharge of water soluble redox mediators such as biologically recalcitrant compounds will result in the secondary contamination. The immobilized redox mediator prepared by incorporation of anthraquinonedisulphon-ate (AQDS) during the electropolymerization of pyrrole monomer on active carbon felt (ACF), AQDS/PPy/ACF, was used for catalyzing bioreduction of 2,4-dinitrotoluene(2,4-DNT) in this study. The results showed that the morphology of the PPy films deposits on ACF are characterized by some globular structure; AQDS/PPy/ACF exhibited good catalytic activity and stability for 2,4-DNT, the enhanced reduction rates obtained in the incubations with AQDS/PPy/ACF was about 5 times that without AQDS/PPy/ACF, the corresponding first-order reduction rate constant k reached 0.045 h-1; 2,4-DNT was reduced to be 2,4-diaminotoluene via 2-amino-4-nitrotoluene and 4-amino-2-nitrotoluene in the system.

• Periodical: Advanced Materials Research (Volumes 610-613)
• Pages: 129-132
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.610-613.129
• Online since: December 2012
• Authors: Jing Wang, Guang Fei Liu, Hong Lu, Ji Ti Zhou, Lihua Li
• Keywords: Biotransformation, Dinitrotoluene, Electropolymerization, Polypyrrole, Solid Redox Mediator

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