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通过蓝菌MICP去除低碳:代谢机制和物种效率

Jia-Qi Sha¹, Jing An², Shu-He Wei²

¹Key Laboratory of Pollution Ecology and Environmental Engineering, Institute of Applied Ecology, Chinese Academy of Sciences, Shenyang 110016, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China.

Bioresource technology

|June 6, 2025

概括

菌媒介的微生物诱导碳酸盐沉 (MICP) 为 (Cd) 污染的水提供了低碳溶液. 这种病原体是Synechococcus sp. 通过增强的MICP,证明了优越的Cd去除和碳封存,促进可持续的废水处理和碳中和.

科学领域:

环境科学环境科学
微生物学微生物学
环境工程环境工程

背景情况:

水中的 (Cd) 污染构成了全球环境挑战,需要能源密集的处理方法,这些方法有助于碳排放和气候变化.
微生物诱导碳酸盐沉 (MICP) 使用蓝藻细菌为修复重金属污染水提供了一个有希望的低碳替代方案.

研究的目的:

评估蓝菌MICP在污染水中低碳去除 (Cd2+) 的有效性.
为了比较不同蓝藻菌株 (Synechococcus sp., Synechocystis sp. 和 Microcystis aeruginosa) 在Cd去除和碳固定方面的表现.
调查潜在的机制,包括矿物质形成,pH值,碳酸盐度,细胞密度和基因表达,推动有效的Cd修复和碳封存.

主要方法:

进行了微生物诱导碳酸盐沉 (MICP) 实验,使用了三种蓝藻细菌菌株:Synechococcus sp., Synechocystis sp. 和 Microcystis aeruginosa.
量化 (Cd²⁺) 的去除速度和碳封存量.
分析了矿物沉量 (CdCO₃),测量了关键的生化参数 (pH,CO₃^2-度),评估了蓝菌生长 (细胞密度,叶绿素-a),并检查了基因表达 (CcmO,CcmK,PsbA,PsaD).

主要成果:

这种病原体是Synechococcus sp. 与Synechocystis sp.相比,它实现了显著更高的Cd²⁺去除率 (97.13 ± 1.64%) 和碳封存 (0.101 ± 0.008毫克). 和微囊气球菌.
使用Synechococcus sp.进行MICP过程. 产生不规则的球形CdCO3矿物质 (0.55.0微米),并与更高的pH值 (10.667±0.311) 和碳酸盐度 (80.995±2.500 mg·L-1) 相关.
提高了Synechococcus sp. 的性能. 与更高的细胞密度,甲度和参与CO2度和光合作用的基因转录的升高有关.

结论:

菌MICP,特别是使用Synechococcus sp.,是一种有效的低碳策略,用于修复 (Cd) 污染的废水.
该过程不仅可以去除危险金属,还可以封存碳,为环境管理带来双重好处.
这种方法减少了对能源密集型水处理的依赖,为减缓气候变化和全球碳中和目标做出了贡献.

关键词:

碳封存是一种碳封存方式.Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd Cd 在线播放在线播放在线播放在线播放蓝藻细菌是一种蓝藻细菌.在MICP中,MICP是MICP.机理机制机理机制

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