Scholarlink

<p>Oil contamination in coastal wetlands jeopardizes these ecosystems and worsens climate warming. Here we analyze 87 metagenomic samples from representative Chinese wetland oilfields and find that genes associated with dissimilatory iron reduction respond to hydrocarbon levels. These genes were closely linked to the breakdown of organic matter into carbon dioxide and methane, highlighting the potential of dissimilatory iron reduction for degrading stubborn hydrocarbons and altering electron transfer pathways. Notably, <i>Geobacter</i>, a key genus for dissimilatory iron reduction, showed strong correlation with iron(II) production and hydrocarbon degradation. To validate these findings, a targeted enhancement of dissimilatory iron reduction with external iron oxide and <i>Geobacter</i> maximized carbon removal, transforming organic-bound fraction of iron into carbonate-bound fraction. The intensified iron reduction process reduced methane emissions by 38–40% and strengthened microbial interactions by redirecting electron transfer in carbon flow. Our study innovatively mitigates pollution and reduces methane emissions in oil-contaminated wetlands.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Biogeochemical coupling of C/Fe in oil-polluted wetlands associated with iron reduction

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2025年2月3日

查看全文
  • Xiaolin Zhang,
  • Wendan Xue,
  • Guoliang Wang,
  • Jieliang Liang,
  • Qi Wang,
  • Yuhao Li,
  • Wensheng Shu,
  • Qixing Zhou

摘要

Oil contamination in coastal wetlands jeopardizes these ecosystems and worsens climate warming. Here we analyze 87 metagenomic samples from representative Chinese wetland oilfields and find that genes associated with dissimilatory iron reduction respond to hydrocarbon levels. These genes were closely linked to the breakdown of organic matter into carbon dioxide and methane, highlighting the potential of dissimilatory iron reduction for degrading stubborn hydrocarbons and altering electron transfer pathways. Notably, Geobacter, a key genus for dissimilatory iron reduction, showed strong correlation with iron(II) production and hydrocarbon degradation. To validate these findings, a targeted enhancement of dissimilatory iron reduction with external iron oxide and Geobacter maximized carbon removal, transforming organic-bound fraction of iron into carbonate-bound fraction. The intensified iron reduction process reduced methane emissions by 38–40% and strengthened microbial interactions by redirecting electron transfer in carbon flow. Our study innovatively mitigates pollution and reduces methane emissions in oil-contaminated wetlands.