title: Cadmium removal and 2,4-dichlorophenol degradation by immobilized Phanerochaete chrysosporium loaded with nitrogen-doped TiO2 nanoparticles.
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.
authors.affiliation: College of Environmental Science and Engineering, Hunan University, Changsha, 410082, People's Republic of China. gqchen@hnu.edu.cn
authors.forename: Guiqiu
authors.initials: G
authors.lastname: Chen
authors.forename: Song
authors.initials: S
authors.lastname: Guan
authors.forename: Guangming
authors.initials: G
authors.lastname: Zeng
authors.forename: Xiaodong
authors.initials: X
authors.lastname: Li
authors.forename: Anwei
authors.initials: A
authors.lastname: Chen
authors.forename: Cui
authors.initials: C
authors.lastname: Shang
authors.forename: Ying
authors.initials: Y
authors.lastname: Zhou
authors.forename: Huanke
authors.initials: H
authors.lastname: Li
authors.forename: Jianmin
authors.initials: J
authors.lastname: He
mesh_terms: D002104:Cadmium / Q000378:metabolism*; D018914:Cells, Immobilized; D002733:Chlorophenols / Q000378:metabolism*; D004785:Environmental Pollutants / Q000378:metabolism*; D006863:Hydrogen-Ion Concentration; D025301:Hyphae / Q000166:cytology / Q000378:metabolism; D053758:Nanoparticles / Q000737:chemistry*; D020075:Phanerochaete / Q000166:cytology / Q000378:metabolism*; D014025:Titanium
chemical_list: D002733:Chlorophenols; D004785:Environmental Pollutants; D002104:Cadmium; C009495:titanium dioxide; D014025:Titanium; C004762:2,4-dichlorophenol