从污染环境中分离出的原生Desmodesmus菌株的去除性能和工艺特征
Micaela B Gómez Jousse1, Carolina Bagnato1, Gisela Ferraro1
1Departamento de Eficiencia Energética y Biotecnología Ambiental, Centro Atómico Bariloche, Comisión Nacional de Energía Atómica (CNEA), Av. E. Bustillo 9500, CP 8400, S.C. de Bariloche, Río Negro, Argentina; Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET), Argentina.
Journal of environmental management
|September 1, 2025
概括
两个Desmodesmus sp. 藻类菌株通过生物吸收和沉有效地去除. 最佳条件包括pH7,0.3g/L生物量和15小时的接触时间,以实现有效的生物修复.
科学领域:
- 环境科学
- 生物技术
- 微生物学
背景情况:
- 由于有毒性和持久性,金属污染带来了重大的生态风险.
- 有效和可持续的整治策略对于减轻环境污染至关重要.
- 单细胞藻有望从污染水中去除溶解的金属.
研究的目的:
- 评估两个土著的Desmodesmus sp. 的 (Ni) 去除能力. 这是一个很大的问题.
- 确定这些藻类菌株对Ni (II) 清除的最佳条件.
- 为了阐明由Desmodesmus sp.
主要方法:
- 培养的 德斯莫德斯斯 sp. 在矿物介质中,Ni (II) 暴露.
- 测试变量:初始pH,接触时间,生物质度,光和生物质活力.
- 使用福里埃变换红外 (FT-IR) 光谱,扫描电子显微镜-能量散射X射线光谱 (SEM-EDS) 和传输电子显微镜 (STEM) 的分析.
主要成果:
- 在pH~6.5-7,0.3g/L生物量和15小时接触时间的最佳条件下,最大的Ni (III) 清除 (>150 mg/g) 发生.
- 藻类活动增加了中等pH值,促进了沉.
- 在FT-IR,SEM-EDS和STEM分析中显示,Ni(II) 结合细胞壁功能组和表面沉积,没有观察到细胞内吸收.
结论:
- 吸附和沉是Desmodesmus sp.
- 这项研究确定了两种新的Desmodesmus sp. 具有显著的生物修复潜力.
- 这些发现提供了关于藻类去除金属的策略和环境清洁机制的见解.
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