Abstract
Phanerochaete chrysosporium has been identified as an effective bioremediation agent for its biosorption and degradation ability. However, the applications of P. chrysosporium are limited owing to its long degradation time and low resistance to pollutants. In this research, nitrogen-doped TiO2 nanoparticles were loaded on P. chrysosporium to improve the remediation capacity for pollutants. The removal efficiencies were maintained at a high level: 84.2 % for Cd(II) and 78.9 % for 2,4-dichlorophenol (2,4-DCP) in the wide pH range of 4.0 to 7.0 in 60 h. The removal capacity of immobilized P. chrysosporium loaded with nitrogen-doped TiO2 nanoparticles (PTNs) was strongly affected by the initial Cd(II) and 2,4-DCP concentrations. The hyphae of PTNs became tight, and a large amount of crystals adhered to them after the reaction. Fourier transform infrared spectroscopy showed that carboxyl, amino, and hydroxyl groups on the surface of PTNs were responsible for the biosorption. In the degradation process, 2,4-DCP was broken down into o-chlorotoluene and 4-hexene-1-ol. These results showed that PTNs is promising for simultaneous removal of Cd(II) and 2,4-DCP from wastewater.
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Acknowledgments
This study was financially supported by the National Natural Science Foundation of China (51178171, 50908078, 50978088, 51039001), the Program for New Century Excellent Talents in University (NCET-10-0361), the Program for Changjiang Scholars and Innovative Research Team in University (IRT0719), the Hunan Key Scientific Research Project (2009FJ1010), and the Hunan Provincial Natural Science Foundation of China (10JJ7005).
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Chen, G., Guan, S., Zeng, G. et al. Cadmium removal and 2,4-dichlorophenol degradation by immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticles. Appl Microbiol Biotechnol 97, 3149–3157 (2013). https://doi.org/10.1007/s00253-012-4121-1
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DOI: https://doi.org/10.1007/s00253-012-4121-1