乳酸细菌对离子的生物吸收以及在废水中的应用
Guangwei Liu1, Wenlin Geng1, Yi Wu1
1School of Chemical and Material Engineering, Jiangnan University, Wuxi, 214122, Jiangsu, China.
Archives of microbiology
|December 12, 2023
概括
两个乳酸细菌菌株CN-011和CN-005通过生物吸收有效地从废水中去除离子 (Pb2+). 这些细菌表现出高耐受性和吸附能力,提供了一个有前途的生物修复策略.
科学领域:
- 环境微生物学 环境微生物学
- 生物修复是一种生物修复.
- 材料科学 材料科学 材料科学
背景情况:
- 水中的 (Pb2+) 污染对环境和健康构成重大风险.
- 使用微生物的生物吸收提供了一种可持续的方法来去除重金属.
- 乳酸细菌以其弹性和生物修复应用中的潜力而闻名.
研究的目的:
- 选和识别具有高 (Pb2+) 生物吸收能力的乳酸细菌菌株.
- 通过选择的细菌菌株来确定离子去除的最佳条件.
- 阐明乳酸细菌对生物吸收的机制.
主要方法:
- 乳酸细菌对耐受性和吸附性的查.
- 优化培养条件 (pH,温度,) 进行Pb2+的去除.
- 生物吸收机制的表征使用福利埃变换红外光谱学 (FTIR),扫描电子显微镜-能量分散光谱仪 (SEM-EDS) 和X射线光电子光谱学 (XPS).
主要成果:
- 两个菌株,CN-011和CN-005,表现出高Pb2+耐受性 (最小杀菌度为1.45 mmol/L).
- 最佳去除条件:pH 7.0,37°C,120rpm 48小时,在纯培养中达到>85%的吸附率,在模拟废水中达到>73%.
- 鉴定发现Pb2+与细胞壁组件 (基,碳酸盐组) 结合,并形成氧化/酸盐沉积物.
结论:
- 乳酸细菌菌株CN-011和CN-005是有效的生物吸收离子 (Pb2+).
- 优化条件提高了除效率,适用于模拟废水.
- 这项研究阐明了涉及细菌细胞壁功能组和表面沉的生物吸收机制.
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