Characteristics of EPS from Pseudomonas aeruginosa and Alcaligenes faecalis under Cd(II) stress: changes in chemical components and adsorption performance

Autor: Zeyang, Lian, Zuoyi, Yang, Weifeng, Song, Mengge, Sun, Yu, Gan, Xiaoyan, Bai
Rok vydání: 2022
Předmět:
Zdroj: Environmental Science and Pollution Research. 29:75883-75895
ISSN: 1614-7499
0944-1344
DOI: 10.1007/s11356-022-21114-z
Popis: EPS (extracellular polymeric substance) production is a self-protection mechanism by which microorganisms slow or eliminate adverse effects in unfavorable environments. In this study, Pseudomonas aeruginosa and Alcaligenes faecalis were selected to explore changes in EPS components, especially protein components, under stress caused by different concentrations of Cd(II). The results showed that the protein content in EPS was the highest. The two strains achieved maximum EPS production levels of 109.17 and 214.96 mg/g VSS at Cd(II) stress concentrations of 20 and 50 mg/L, which were increased by 52.07% and 409.69% compared with the levels exhibited before stress, respectively. The protein content correlated very well with data from adsorption experiments. Furthermore, FTIR, 3D-EEM, and XPS results illustrated that after Cd(II) stress, C-N, C=O/-COOH, and R-NO
Databáze: OpenAIRE
Externí odkaz: