Multiple Land-Use Fugacity Model to Assess the Environmental Fate of PAHs – A Mega-City Under COVID-19 Pandemic

Along with the accelerated process of urbanization, the contradiction between social development and environment become increasingly conspicuous. Herein, we access the transport and fate of polycyclic aromatic hydrocarbons (PAHs) by a newly proposed multiple land-use fugacity (MLUF) model to provide comprehensive understanding of PAHs distribution in an urban and suburban areas. PAHs behave differently towards distinct soil types and land covers within the soil phase. We suggest and implement the MLUF model to estimate the PAHs distribution in diverse land types. Moreover, we introduce a multivariate interpretation and systematic model calibration framework to validate the MLUF model adaptability in different land-use area. Accordingly, the organic film on impervious surfaces holds the highest PAHs concentration than other compartments, also soil and sediment phases keep most of PAHs. The potential cancer risk of PAHs in different land-usecompartments follow the order of urban green space > agricultural area > forest and semi-nature area. Besides, the dynamic MLUF model is developed and implemented to the period of COVID-19 pandemic for quantitively estimating the dynamic variations of the PAHs concentration. Finally, we can realize the better scientific understanding of the typical PAHs environmental pollutants transfer phenomena and distribution fates in urban and suburban areas.