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复合固定细菌对PAHs污染土壤的修复和细菌群体的影响

Jiantao Li¹, Miao Yu¹, Weitao Liu¹

¹MOE Key Laboratory of Pollution Processes and Environmental Criteria, Tianjin Key Laboratory of Urban Ecology Environmental Remediation and Pollution Control, College of Environmental Science and Engineering, Nankai University, Tianjin 300350, PR China.

Journal of hazardous materials

|December 22, 2024

概括

这项研究开发了一种使用生物炭和生物聚合物去除土壤多环芳 (PAHs) 的新型复合固定微生物 (CoIMB). CoIMB在降解PAH方面表现出高效率,提供了稳定且具有成本效益的土壤整治解决方案.

科学领域:

环境科学环境科学
微生物学微生物学
生物技术是生物技术.

背景情况:

多环芳 (PAHs) 是一种持久的土壤污染物.
固定微生物技术为生物修复提供了增强的微生物稳定性和活性.
高效和稳定的细菌制剂的有限可用性阻碍了有效的PAH去除.

研究的目的:

开发和优化复合固定微生物制剂 (CoIMB) 以加强土壤PAH补救.
评估CoIMB在降解各种PAH化合物的效率.
评估CoIMB对土壤微生物群落结构和功能的影响.

主要方法:

使用基修饰生物炭 (Na@CBC700),藻酸盐 (SA) 和聚乙烯醇 (PVA) 来复合固定Acinetobacter.
使用响应表面方法来优化CoIMB制备.
应用CoIMB用于受PAH污染的土壤整治,并分析降解速度和微生物群落变化.

主要成果:

与自由细胞相比,CoIMB表现出更好的机械强度和微生物活性.
实现了2-5环PAH的高降解率 (高达82.41%),显著优于对照 (CK).
改善土壤微生物多样性和特定功能基因 (脂肪酸和能量代谢) 的丰富性.

结论:

复合固定细菌 (CoIMB) 为土壤PAH补救提供了一种新,稳定且具有成本效益的方法.
开发的CoIMB技术显示了对有机污染物的广泛有效性.
这种方法通过增强微生物活动和多样性,显著改善土壤健康.

关键词:

功能性基因是指功能性的基因.固定化的微生物技术技术微生物多样性的微生物多样性.多环芳香碳化合物多环芳香碳化合物响应表面方法响应表面方法

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