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在土壤中非可提取的 perfluorooctanoic 酸 (PFOA) 残留物

Lucie Maâroufi¹, Diana Hofmann², Christiane Zarfl³

¹Institute of Bio- and Geosciences, IBG-3: Agrosphere, Forschungszentrum Jülich GmbH, 152425 Jülich, Germany; Institute of Crop Science and Resource Conservation (INRES), Soil Science and Soil Ecology, Nussallee 13, University of Bonn, 53115 Bonn, Germany.

|September 29, 2024

概括

不能提取的残留物 (NER) 形成了土壤中的 perfluorooctanoic acid (PFOA),但大多数仍然具有生物可用性. 在这项研究中,温度和葡萄糖没有影响PFOA持久性或NER形成.

科学领域:

环境化学环境化学
土壤科学土壤科学
污染物的持久性

背景情况:

和多醇基物质 (PFAS) 是持久的,广泛的和有毒的环境污染物.
假设不可提取的残留物 (NER) 有助于PFAS在土壤中的持久性.
温度在PFAS的NER形成中的作用尚未完全理解.

研究的目的:

为了研究在土壤中形成的非可提取残留物 (NER) 的 perfluorooctanoic 酸 (PFOA).
为了确定温度是否影响PFOA NER形成和整体持久性.
评估增强的微生物活动对PFOA消散的影响.

主要方法:

标有C的PFOA在10°C和20°C的两种土壤类型 (Cambisol,Luvisol) 中进行了化.
使用序列提取 (CaCl₂,ASE) 来量化90天内的PFOA残留物.
监测了C释放到气相和NER形成.

主要成果:

随着时间的推移,PFOA残留物减少,最快的变化发生在前9天.
在研究的土壤中,NER形成达到5-9%.
PFOA的生物可利用分量保持在56-62%的稳定水平,表明可逆转移.
无论是温度还是葡萄糖添加都没有显著影响PFOA散射模式.

结论:

不能提取的PFOA残留物 (NER) 在土壤中确实形成.
大多数PFOA仍然处于生物可利用的形式,这表明其持续的流动性和毒性.
在测试条件下,土壤PFOA持久性不受温度或增强的微生物活性显著影响.

关键词:

生物可用性生物可用性在C-14中使用C-14.建模建模模型是什么启动启动启动微观世界微观世界.

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