Microplastics in soil can make arsenic appear safer by locking it into soil particles, but the same disturbance actually pushes more arsenic into water that drains through soil, meaning the visible risk goes down while the real risk to groundwater and crops goes up.
1
Large macroaggregates (LMA) drive early-stage arsenic release into porewater, while small microaggregates (SMA) sustain arsenic exposure over a longer period.
2
Under arsenic-amended, PVC microplastic-disturbed conditions, solid-phase available arsenic decreased while porewater and leachate arsenic concentrations increased, decoupling the two risk metrics.
3
The decoupling effect intensified during active leaching, showing that intra-aggregate arsenic mobility translates directly into water-phase export.
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