Soil organic contamination is a serious environmental issue that has attracted wide attention. As a low cost and environmental friendly method

the addition of soil amendments has great prospect in soil situ remediation. However

the efficiency of soil amendments on the biodegradation of organic pollutants depends on its impact on bioavailability. Soil amendments have multiple influences on the bioavailability of organic pollutants. On the one hand

organic pollutants are immobilized by soil amendments due to adsorption effect

thus decreasing the bioavailability of the organic pollutant. On the other hand

dissolved organic matter from soil amendments can facilitate the desorption of the organic pollutants and increase the bioavailability. Moreover

microbial activity can be enhanced by soil amendments

which is also beneficial for organic pollutants biodegradation. This paper investigates the impact of three common soil amendments (i.e.

biochar

compost

and surfactants) on the bioavailability of organic pollutants from the perspectives of adsorption and desorption

mass transfer between organic pollutants and microorganism

as well as microbial abundance and activity. Results of this study will provide reference for finding soil amendments with high efficiency.