Quo vadis? Discovering the impact of biofouling on fluvial microplastic transport

Accumulation of microplastics (<5mm) in rivers poses a potentially significant environmental risk. To better assess this risk, exposure and impact need to be further investigated. The exposure depends on the transport behavior of microplastics, which is still poorly understood for rivers. Especially the effect of biofouling on the transport of microplastics has not yet been quantified. Through physical experiments we quantify the influence of biofouling on microplastic transport in rivers. This knowledge will be implemented in models that predict microplastic accumulation sites. In doing so, we are taking an important step in mapping the risks of microplastics in rivers.