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一种可持续的解决方案,用于从水流中减轻六价,使用Lactococcus lactis AM99作为一种新的Cr (VI) 降低细菌

Farid Akhzari¹, Tannaz Naseri¹, Seyyed Mohammad Mousavi²

¹Biotechnology Group, Chemical Engineering Department, Tarbiat Modares University, Tehran, Iran.

Journal of environmental management

|February 2, 2024

概括

一种新的细菌Lactococcus lactis AM99有效地减少了废水中的有毒六价 (Cr(VI)). 这种分离物具有很高的耐受性和效率,使其成为生物修复的有希望的解决方案.

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.
工业生物技术工业生物技术

背景情况:

六价 (Cr(VI)) 是工业过程中的有毒污染物,对水生生态系统构成重大风险.
传统的Cr6处理涉及将其减少到不那么有害的Cr6,但需要有效的生物修复策略.
皮革厂的废水是Cr (VI) 污染的主要来源,需要新的处理方法.

研究的目的:

从皮革工厂的废水中分离和鉴定一种新型细菌,该细菌能够进行Cr (VI) 生物还原.
通过分离的菌株来研究Cr(VI) 生物还原的最佳条件.
评估隔离物的潜力,以修复Cr (VI) 污染的环境.

主要方法:

在有氧条件下从皮厂的废水中分离出一种格拉姆阳性细菌.
使用福里埃变换红外光谱学对隔离物的特征.
优化Cr(VI) 生物还原通过变化温度,初始Cr(VI) 度,乙酸度和Tween 80表面活性剂.
在低生物质水平下评估Cr (VI) 耐受性和生物还原效率.

主要成果:

一种新型菌株,称为Lactococcus lactis AM99,被分离并进行了鉴定.
最佳的生物还原条件被确定为37°C和0.90g/L的酸盐.
在72小时内,Lactococcus lactis AM99在300毫克/升的剂量下实现了88.0%的Cr (VI) 生物还原.
乙酸盐显著增强了Cr (VI) 生物还原,而Tween 80没有明显的影响.
这种菌株表现出高的CrVI) 耐受性 (在固体介质中高达1400mg/L) 和在低生物量下有效的减少.

结论:

乳球菌乳酸菌AM99是一种高效和强大的细菌,用于Cr (VI) 生物修复.
在具有挑战性的条件下,该菌株能够进行Cr (VI) 减少,这使其适用于工业废水处理.
进一步研究生物的细胞外聚合物在减少中的作用可以优化生物修复过程.

关键词:

生物减排可以减少.细胞外聚合物质是细胞外的聚合物质.六价的六价是一种乳球球菌 (lactococcus lactis) 是一种乳球菌.机制机制机制

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