1. College of Environment, Zhejiang University of Technology, Hangzhou 310014, China; 2. Pollution Prevention and Control Engineering Center in Taizhou City, Taizhou 318000, China
Abstract：Adsorption properties to different hydrophobic organic compounds by dried cells, which belonged to the fungus Ophiostoma stenoceras LLC and bacterium Pseudomonas veronii ZW, were compared, and their cell surface hydrophobicity (CSH) were analyzed. The cell surface was characterized by BET, FTIR (Fourier Transform Infrared Spectroscopy) and XPS (X-ray Photoelectron Spectroscopy). Results showed that the specific surface area of Ophiostoma sp. LLC and Pseudomonas sp. ZW was 15.8m2/g and 11.57m2/g respectively. With more mesoporous distributing on their surface, the fungal cells could adsorb organic compounds more efficiently than the bacterial cells. The CSH of the fungus LLC was higher than that of the bacterium ZW when they were at the same growth stage. The CSH of fungal and bacterial cells increased differently during the biodegradation of α-pinene. After being dried, the fungus LLC cells could adsorb different hydrophobic organic compounds followed this order: ethyl acetate > α-pinene > n-hexane, suggesting that low hydrophobic organic compounds could be more easily adsorbed. XPS and FTIR analysis also indicated that the position and the number of functional groups on the surface of the fungal cells did not change obviously before and after the adsorption of organic compounds. These results suggested that the adsorption was a physical process.
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