Soil is the recipient of organic pollutants as a consequence of anthropogenic activities. Hydrocarbons are contaminants that pose a risk to human and environmental health. Bioremediation of aging contaminated soils is a challenge due to the low biodegradability of contaminants as a result of their interaction with the soil matrix. The aim of this work was to evaluate the effect of both composting and the addition of mature compost on a soil chronically contaminated with hydrocarbons, focusing mainly on the recovery of soil functions and transformations of the soil matrix as well as microbial community shifts. The initial pollution level was 214 ppm of polycyclic aromatic hydrocarbons (PAHs) and 2500 ppm of aliphatic hydrocarbons (AHs). Composting and compost addition produced changes on soil matrix that promoted the release of PAHs (5.7 and 15 % respectively) but not the net PAH elimination. Interestingly, composting stimulated AHs elimination (about 24 %). The lack of PAHs elimination could be attributed to the insufficient PAHs content to stimulate the microbial degrading capacity, and the preferential consumption of easily absorbed C sources by the bacterial community. Despite the low PAH catabolic potential of the aging soil, metabolic shift was driven by the addition of organic matter, which could be monitored by the ratio of Proteobacteria to Actinobacteria combined with E₄/E₆ ratio. Regarding the quality of the soil, the nutrients provided by the exogenous organic matter contributed to the recovery of the global functions and species diversity of the soil along with the reduction of phytotoxicity.

由于人类活动，土壤是有机污染物的接受者。碳氢化合物是对人类和环境健康构成威胁的污染物。老化的污染土壤的生物修复是一个挑战，因为污染物与土壤基质的相互作用导致其生物降解能力低。这项工作的目的是评估堆肥和添加成熟堆肥对长期被碳氢化合物污染的土壤的影响，主要侧重于土壤功能的恢复和土壤基质的转化以及微生物群落的转移。最初的污染水平是214 ppm的多环芳烃（PAHs）和2500 ppm的脂族烃（AHs）。堆肥和堆肥的添加会改变土壤基质，从而促进PAHs的释放（5。分别为7％和15％），但不排除净PAH。有趣的是，堆肥促进了AHs的清除（约24％）。缺乏PAHs的消除可能是由于PAHs含量不足以刺激微生物降解能力，以及细菌群落优先吸收了易吸收的C源。尽管老化土壤的PAH分解代谢潜能低，但是代谢变化是由有机物的添加驱动的，这可以通过变形杆菌与放线菌与E的比例来监测 以及细菌群落优先吸收易吸收的碳源。尽管老化土壤的PAH分解代谢潜能低，但是代谢变化是由有机物的添加驱动的，这可以通过变形杆菌与放线菌与E的比例来监测 以及细菌群落优先吸收易吸收的碳源。尽管老化土壤的PAH分解代谢潜能低，但是代谢变化是由有机物的添加驱动的，这可以通过变形杆菌与放线菌与E的比例来监测₄ / E ₆比率。关于土壤的质量，外源有机物提供的养分有助于恢复土壤的整体功能和物种多样性，并减少植物毒性。