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<p>Composite pollution poses a significant challenge for soil remediation. This study simulated arsenic and PAH-contaminated soil in karst regions to evaluate the effectiveness of electro-bioremediation under varying soil conditions. Results showed that <i>Alcaligenes faecalis</i> subsp. faecalis exhibited strong PAH degradation and moderate As(V) reduction capabilities. PAH removal efficiency was maximized (55.93%), while arsenic removal efficiency declined as pH increased. Higher soil organic carbon and available nitrogen reduced arsenic removal, whereas increased available phosphorus enhanced it. Under optimized conditions (35&#xa0;g/kg organic carbon, 150&#xa0;mg/kg nitrogen, 50&#xa0;mg/kg phosphorus), residual arsenic was minimized (118.80&#xa0;mg/kg), and PAH removal peaked at 45.47%. These findings underscore the pivotal role of soil parameters in remediation efficiency, offering practical insights for optimizing electro-bioremediation strategies for soil contaminated by arsenic and PAH.</p>

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Remediation of arsenic and polycyclic aromatic hydrocarbon contaminated soils using electro-microbial combined remediation: effects of soil physicochemical properties

  • 期刊论文

  • 发表日期：

    2025年5月26日

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  • Chengchen Jiang,
  • Shuai Zhou,
  • Xiaohua Shu,
  • Guo Yu,
  • Honghu Zeng,
  • Zongqiang Zhu,
  • Chen Yang,
  • Zhi Dang

摘要

Composite pollution poses a significant challenge for soil remediation. This study simulated arsenic and PAH-contaminated soil in karst regions to evaluate the effectiveness of electro-bioremediation under varying soil conditions. Results showed that Alcaligenes faecalis subsp. faecalis exhibited strong PAH degradation and moderate As(V) reduction capabilities. PAH removal efficiency was maximized (55.93%), while arsenic removal efficiency declined as pH increased. Higher soil organic carbon and available nitrogen reduced arsenic removal, whereas increased available phosphorus enhanced it. Under optimized conditions (35 g/kg organic carbon, 150 mg/kg nitrogen, 50 mg/kg phosphorus), residual arsenic was minimized (118.80 mg/kg), and PAH removal peaked at 45.47%. These findings underscore the pivotal role of soil parameters in remediation efficiency, offering practical insights for optimizing electro-bioremediation strategies for soil contaminated by arsenic and PAH.