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Updated: Jun 4, 2025

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在两个酸性土壤中携带大肠杆菌:微生物诱导的石沉技术的影响

Zahra Ramezani¹, Mohammad Bagher Farhangi¹, Nasrin Ghorbanzadeh¹

¹Department of Soil Science, Faculty of Agricultural Sciences, University of Guilan, Rasht 41635-1314, Iran.

Journal of contaminant hydrology

|January 4, 2025

概括

微生物诱导的石沉 (MICP) 通过降低液压导电性,有效地减少了埃舍里希亚大肠杆菌 (E. coli) 在酸性土壤中的运输. 这一过程增强了土壤过,减轻了土壤深层细菌污染的风险.

科学领域:

环境微生物学环境微生物学
土壤科学土壤科学
生物地质化学生物地质化学

背景情况:

微生物诱导的石沉 (MICP) 可以改变土壤特性,包括pH和液压导电性.
了解MICP对细菌传输的影响对于土壤整治和水质保护至关重要,特别是在酸性环境中.

研究的目的:

评估MICP在两个不同的酸性土壤中过大肠杆菌 (E. coli) 的有效性.
评估MICP对土壤液压导电性和细菌传输的影响.

主要方法:

两个酸性土壤样本 (pH5.88和3.93) 用MICP溶液 (尿素,CaCl2,Sporosarcina pasteurii) 在列中进行处理.
使用化物追踪剂和大肠杆菌进行了漏实验,随后对废水和土壤特性进行了分析.
在MICP处理前后测量了液压导电性,尿酶活性和CaCO3含量.

主要成果:

在两种土壤中,MICP处理显著降低了4.4-5.8倍的液压导电性,与增加的生物沉的CaCO3.8相关.
细菌的浸出量大幅减少,MICP的平均大肠杆菌数量与对照人群相比降低了约3.4倍.
较低pH的土壤 (Lahijan) 呈现出更高的大肠杆菌过率,这归因于细菌死亡率增加和静电吸引.

结论:

在酸性土壤中应用MICP有效中和pH,并通过降低土壤液压导电性来降低大肠杆菌传播的风险.
MICP提供了一个有希望的基于生物的策略,用于增强土壤过和防止病原细菌污染地下水.

关键词:

氧化 (CaCO) 的3)液压导电能力液压导电能力在MICP中,MICP是MICP.子糖粉末的使用方法在Urease中使用Urease.

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