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聚环芳的电化学氧化,在土壤中与一起被污染

Kim Johansson¹, Azariel Ruiz-Valencia², Ivan Carabante¹

¹Waste Science and Technology, Luleå Technical University, Luleå, 971 87, Sweden.

Journal of environmental management

|May 30, 2025

概括

电化学氧化 (EO) 在受污染的土壤中有效降解了多环芳 (PAHs). 这种创新方法在没有化学添加剂的情况下将PAHs减少了82%,显示出对环境修复的希望.

科学领域:

环境化学环境化学
土壤科学土壤科学
电化学电化学电化学

背景情况:

木材保护活动导致土壤广泛受到多环芳 (PAH) 的污染.
经常共同污染这些地点,使修复工作复杂化.
需要现场整治方法来应对这些复杂的环境挑战.

研究的目的:

调查电化学氧化 (EO) 对土壤中PAHs在现场降解的有效性.
评估EO对共同污染的土壤中的土壤微生物群落的影响.
在不需要化学添加剂的情况下评估EO的性能.

主要方法:

两个1立方米的实验箱被污染的沙子和泥炭层.
安装了铁电极,并使用脉冲直流与交替极性进行了电化学氧化.
在两个季节内,分析了土壤溶液和土壤样本的PAH度和微生物DNA.

主要成果:

在第二个季节结束时,在土壤溶液中观察到PAH16度平均下降82%.
电化学氧化在降解中等和高分子量PAH方面更有效.
在12个土壤采样点中的10个发现了显著的PAH16减少,沙子 (84%) 的减少比泥炭 (69%) 更大.
微生物群体分析显示,DNA度没有显著变化,Gammaproteobacteria仍然占主导地位.

结论:

电化学氧化是一种可行的,无添加剂的技术,用于在现场修复受PAH污染的土壤.
氧化有效降解反抗性PAH化合物,特别是中高分子量分数.
微生物群体表现出弹性,在EO治疗下,Gammaproteobacteria仍然存在.

关键词:

在现场进行土壤整治.微生物学分析微生物学分析这些PAH是PAH.土壤溶液中的土壤溶液

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