Biodegradation of PAEs in contaminated soil by immobilized bacterial agent and the response of indigenous bacterial community

IF 7.6 2区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES Environmental Pollution Pub Date : 2024-09-08 DOI:10.1016/j.envpol.2024.124925

Xiangzhi Zuo, Wenyi Lu, Wanting Ling, Bozena Czech, Patryk Oleszczuk, Xuwen Chen, Yanzheng Gao

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Abstract

Phthalic acid esters (PAEs) are common hazardous organic contaminants in agricultural soil. Microbial remediation is an effective and eco-friendly method for eliminating PAEs. Nevertheless, the operational mode and potential application of immobilized microorganisms in PAEs-contaminated soil are poorly understood. In this study, we prepared an immobilized bacterial agent (IBA) using a cedar biochar carrier to investigate the removal efficiency of PAEs by IBA in the soil. We found that IBA degraded 88.35% of six optimal-control PAEs, with 99.62% biodegradation of low-molecular-weight PAEs (DMP, DEP, and DBP). The findings demonstrated that the IBA achieved high efficiency and a broad-spectrum in degrading PAEs. High-throughput sequencing revealed that IBA application altered the composition of the soil bacterial community, leading to an increase in the relative abundance of PAEs-degrading bacteria (). Furthermore, co-occurrence network analysis indicated that IBA promoted microbial interactions within the soil community. This study introduces an efficient method for the sustainable remediation of PAEs-contaminated soil.

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固定细菌制剂对受污染土壤中 PAEs 的生物降解及本地细菌群落的反应

邻苯二甲酸酯（PAEs）是农业土壤中常见的有害有机污染物。微生物修复是消除 PAEs 的一种有效且环保的方法。然而，人们对固定化微生物在 PAEs 污染土壤中的运行模式和潜在应用还知之甚少。在本研究中，我们利用杉木生物炭载体制备了一种固定化细菌制剂（IBA），研究了 IBA 对土壤中 PAEs 的去除效率。我们发现，IBA 对六种最佳控制 PAEs 的降解率为 88.35%，对低分子量 PAEs（DMP、DEP 和 DBP）的生物降解率为 99.62%。研究结果表明，IBA 能高效、广谱地降解 PAEs。高通量测序显示，施用 IBA 改变了土壤细菌群落的组成，导致 PAEs 降解细菌的相对丰度增加（）。此外，共生网络分析表明，IBA 促进了土壤群落中微生物的相互作用。这项研究为可持续修复受 PAEs 污染的土壤提供了一种有效的方法。

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来源期刊

Environmental Pollution 环境科学-环境科学

CiteScore

16.00

自引率

6.70%

发文量

2082

审稿时长

2.9 months

期刊介绍： Environmental Pollution is an international peer-reviewed journal that publishes high-quality research papers and review articles covering all aspects of environmental pollution and its impacts on ecosystems and human health. Subject areas include, but are not limited to: • Sources and occurrences of pollutants that are clearly defined and measured in environmental compartments, food and food-related items, and human bodies; • Interlinks between contaminant exposure and biological, ecological, and human health effects, including those of climate change; • Contaminants of emerging concerns (including but not limited to antibiotic resistant microorganisms or genes, microplastics/nanoplastics, electronic wastes, light, and noise) and/or their biological, ecological, or human health effects; • Laboratory and field studies on the remediation/mitigation of environmental pollution via new techniques and with clear links to biological, ecological, or human health effects; • Modeling of pollution processes, patterns, or trends that is of clear environmental and/or human health interest; • New techniques that measure and examine environmental occurrences, transport, behavior, and effects of pollutants within the environment or the laboratory, provided that they can be clearly used to address problems within regional or global environmental compartments.