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<p>Crude oil pollution in soil poses a serious global risk to food production and ecosystem health. Polycyclic aromatic hydrocarbons (PAHs) are toxic organic compounds found in crude oil and pose health and ecosystem risks. In this study, we assessed the efficiency of indigenous Syrian fungal and bacterial isolates to biodegrade PAHs. To evaluate bioremediation potential, eighteen isolates were isolated, identified, and tested against 28 detected PAHs. The fungal isolates <i>Aspergillus niger</i>, <i>Penicillium</i> sp<i>.,</i> and <i>Cladosporium</i> sp<i>.</i> exhibited chromatic change rates (CCR) of 82.2%, 87.3%, and 89.0%, respectively, and their combinations reached CCR of 93.7 ± 1.8%. Key bacterial isolates, including <i>Pseudomonas</i> sp<i>., Bacillus</i> sp<i>.,</i> and <i>Micrococcus</i> sp<i>.,</i> demonstrated effectiveness ranging from 77.3 to 78% individually, and 90.7% for consortium. Gas chromatography-mass spectrometry (GC–MS) analysis confirmed substantial reductions in crude oil components after biodegradation. These results demonstrated the value of indigenous microbes for bioremediation. This study is the first combined bacterial–fungal study of PAHs biodegradation in Syria, supporting the use of local isolates to enhance food security and environmental health. This would help decision makers to think about using eco-friendly strategies for PAHs remediation.</p>

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Efficiency of indigenous microorganisms for biodegradation of polycyclic aromatic hydrocarbons in crude oil-contaminated soil

  • 期刊论文

  • 发表日期：

    2025年12月9日

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  • Nabila Kridi,
  • Alaa Khallouf,
  • Marah Iskandar,
  • Abd Elaziz Sulieman Ahmed Ishag,
  • Magboul M. S. Siddig

摘要

Crude oil pollution in soil poses a serious global risk to food production and ecosystem health. Polycyclic aromatic hydrocarbons (PAHs) are toxic organic compounds found in crude oil and pose health and ecosystem risks. In this study, we assessed the efficiency of indigenous Syrian fungal and bacterial isolates to biodegrade PAHs. To evaluate bioremediation potential, eighteen isolates were isolated, identified, and tested against 28 detected PAHs. The fungal isolates Aspergillus niger, Penicillium sp., and Cladosporium sp. exhibited chromatic change rates (CCR) of 82.2%, 87.3%, and 89.0%, respectively, and their combinations reached CCR of 93.7 ± 1.8%. Key bacterial isolates, including Pseudomonas sp., Bacillus sp., and Micrococcus sp., demonstrated effectiveness ranging from 77.3 to 78% individually, and 90.7% for consortium. Gas chromatography-mass spectrometry (GC–MS) analysis confirmed substantial reductions in crude oil components after biodegradation. These results demonstrated the value of indigenous microbes for bioremediation. This study is the first combined bacterial–fungal study of PAHs biodegradation in Syria, supporting the use of local isolates to enhance food security and environmental health. This would help decision makers to think about using eco-friendly strategies for PAHs remediation.