The aim of this study was to assess the organic carbon (OC) content in the PM10 emitted by agricultural soils and rural roads under controlled conditions. Samples were collected from agricultural soils and rural roads. The PM10 was generated and collected using an electrostatic precipitator coupled with the Easy Dust Generator (EDG). This procedure ensures that the PM10 collected come specifically from soil. OC contents were measured in both the soil and PM10. The enrichment ratio (ER) was calculated as the ratio between OC content in the PM10 and OC content in the soil. The results showed that OC content in the PM10 ranged from 2.7% to 3.5% in agricultural soils and from 1.4% to 2.9% in rural roads. These values were comparable with the OC contents observed in fine particles transported by the wind, but lower than OC contents observed in PM10 samples collected in rural areas using active samplers and filters. A quadratic function described the association between OC in PM10 and OC in the soil. A negative potential function described the association between ERs and OC in the soil. Both associations suggested a saturation of OC in PM10 when the OC content in the soil was high. This information is crucial for a better comprehending of the dust emission role in the redistribution of OC within terrestrial ecosystems and to the atmosphere and oceans.

中文翻译：

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农村土壤排放颗粒物中的土壤有机碳富集：实验室评估

本研究的目的是评估受控条件下农业土壤和农村道路排放的 PM10 中的有机碳 (OC) 含量。样品是从农业土壤和农村道路采集的。PM10 是使用静电除尘器与 Easy Dust Generator (EDG) 结合产生和收集的。此程序可确保收集的 PM10 专门来自土壤。测量了土壤和 PM10 中的 OC 含量。富集率（ER）计算为PM10中OC含量与土壤中OC含量之比。结果表明，农田土壤中PM10中OC含量为2.7%~3.5%，乡村道路中PM10中OC含量为1.4%~2.9%。这些值与风输送的细颗粒物中观察到的 OC 含量相当，但低于使用主动采样器和过滤器在农村地区收集的 PM10 样本中观察到的 OC 含量。二次函数描述了 PM10 中的 OC 与土壤中的 OC 之间的关联。负势函数描述了土壤中 ER 和 OC 之间的关联。这两个协会都表明，当土壤中的 OC 含量较高时，PM10 中的 OC 就会饱和。这些信息对于更好地理解粉尘排放在陆地生态系统内以及大气和海洋中有机碳重新分配中的作用至关重要。