Metal oxide nanomaterials(MONMs)are widely used in production and life.MONMs can enter the soil environment through various pathways,posing a threat to soil organisms(specially for plants)and human health.Root exudates(REs),as a medium for substance exchange between plants and the outside world,can interact with MONMs and then affect their biotoxicity,which plays a vital role in assessing the ecological health risk assessment of MONMs in soil.In this paper,we review the sources of MONMs in soil and summarize the interfacial interactions between REs and MONMs,highlighting the REs-mediated phytotoxicity of MONMs and the effects of environmental influencing factors,with the outlook on further future research trends.This review provides a theoretical basis for the ecological health risks and potential applications of MONMs in the environment.
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