An outlook on microbial behavior: Mimicking a biodiesel (B100) spill in sandy loam soil

•The three types of biodiesel used in this study showed a high level of biodegradability.•The high rate of CO2 released by the mineralization of these biocomposites can be a worrying factor.•The change in the soil microbial community contaminated with the three types of biodiesel can affect soil quality. Although different types of biodiesel are marketed worldwide, studies on their environmental impact are scarce. Therefore, we selected pure biodiesels (B100) from rapeseed (BR), sunflower (BF), and soybean (BS) to mimic their contamination of sandy loam soil and then studied their biodegradation by the soil microcosms. All the biodiesel samples presented significant values (p