Abstract

It is essential to have knowledge of the biodegradation kinetics of biodiesel fuels while choosing the best remediation tactics and doing risk and impact assessments. However, there is a lack of consistency in this information, and we still don't fully understand what causes variation in biodegradation rates. In order to determine the 142 biodegradation and 56 mineralization half-lives of diesel and biodiesel fuels in diverse experimental setups, we thoroughly analysed 32 scientific literature sources. Using sets of averaged half-life values and their statistical uncertainty, the analysis focused on the variation in half-lives among fuels and experimental settings. Biodegradation half-lives varied from 9 to 62 days across all data sites and were 2-5.5 times shorter than mineralization half-lives. In terrestrial environments, biodegradation and mineralization half-lives were 2.5–8.5 times longer for all fuels than in aquatic systems. a system of water. Although discrepancies in the quantity of data points from separate studies obscured differences in half-lives between different fuels, the half-lives were generally shorter for blends with greater biodiesel concentration. The kind of mixes and experimental system did not, in the majority of cases, have statistically significant effects on biodegradation half-lives. While more research is necessary to define the rates of biodegradation in anaerobic environments, our data can be utilised to better characterise the dangers and effects of biodiesel fuels in aerobic aquatic and terrestrial habitats. Due to its relatively high biodegradability, biodiesel fuels may benefit from remediation techniques that use monitored natural attenuation and other passive methods to degrade and disperse contaminants in their natural environments.