In human society, there is a demand for sustainable solutions for water preservation and efficient treatment systems. An important water reservoir is road runoff defined as rainwater leaching from roads, loading micropollutants and infiltrating the soil. We aimed to study this poorly understood feature using large-scale metabolomic analysis coupled with analysis of soil physico-chemical properties and molecular chemical similarity enrichment. A total of 2406 micropollutants were assayed to understand their distribution and assess the trapping abilities of a road runoff infiltration system composed of a sedimentation pond and an infiltration pond. Here, we confirm the essential role of the infiltration pond in preventing environmental contamination and propose a model correlating micropollutant abundance and the soil physico-chemical properties. We demonstrate that sand in infiltration ponds is a key player, helping retain 86% of the micropollutant abundance and propose a model that could be easily applied for road runoff management.

人类社会需要可持续的水资源保护和高效处理系统解决方案。一个重要的水库是道路径流，定义为雨水从道路中淋出，加载微污染物并渗入土壤。我们旨在使用大规模代谢组学分析结合土壤理化特性和分子化学相似性富集分析来研究这一鲜为人知的特征。共分析了 2406 种微污染物，以了解它们的分布并评估由沉淀池和渗透池组成的道路径流渗透系统的截留能力。在这里，我们确认了渗透池在防止环境污染方面的重要作用，并提出了一个将微污染物丰度与土壤理化性质相关联的模型。