Abstract：Through three kinds of carbon source (HCOONa, CH3COONa and C6H12O6), under different concentrations of Desulfovibrio desulfuricans sub sp.(D. desulfuricans sp.) for stress/induction training, the changes in EPS fractions before and after stress/induction and changes in the sorption properties of Cd(II) were investigated. The results showed that when the stress concentration of HCOONa was 3.0g/L, the stress/induction effect was the most obvious, EPS production reached 1709.78mg/g VSS, and the protein yield in EPS was the highest, reaching 1516.68mg/g VSS, which was 244.93% higher than that before stress/induction. Under these conditions, HCOONa-EPS showed the highest adsorption of Cd(II) at 1081.95mg/g EPS, an increase of 99.47%, and the adsorption process conforms to the secondary kinetic law. Three-dimensional fluorescence (3D-EEM) tests showed that the protein content, especially tryptophan-like content, increased significantly in EPS after stress/induction. Fourier infrared spectroscopy (FTIR) test showed that C=O, N-H/C-N, C-O-C and other functional groups increased greatly after stress, which played an important role in adsorption of Cd(II). X-ray electron spectroscopy (XPS) showed that after the stress/induction of carbon source HCOONa, the concentration of functional groups such as C-O/C-N, C=O, C=N and other functional groups in EPS increased significantly, which may be the main group for adsorption of Cd(II).
黄祥武, 宋卫锋, 杨佐毅, 戴文灿, 甘雨, 连泽阳, 周文斌, 陈丽瑶, 吴芷昕. 碳源诱导下D. desulfuricans sub sp. EPS特性及对Cd(Ⅱ)的吸附[J]. 中国环境科学, 2023, 43(6): 2889-2898.
HUANG Xiang-wu, SONG Wei-feng, YANG Zuo-yi, DAI Wen-can, GAN Yu, LIAN Ze-yang, ZHOU Wen-bin, CHENG Li-yao, WU Zhi-xin. The EPS characteristics of D. desulfuricans sub sp. and its adsorption performance for Cd(Ⅱ) under carbon source induction. CHINA ENVIRONMENTAL SCIENCECE, 2023, 43(6): 2889-2898.
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