We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Fate, transport, and ecotoxicological impacts of nanoplastics in soil systems: Interactions with earthworms and soil microbial dynamics
Summary
This review pulls together findings from 18 studies on how tiny plastic particles (nanoplastics) behave in soil, showing they can harm earthworms and disrupt the soil bacteria that keep dirt healthy and fertile. Since healthy soil is the foundation of our food supply, this matters because damaged soil ecosystems could affect crop quality over time — plus these nanoplastics can act like tiny magnets, dragging other harmful chemicals along with them into the environment and potentially our food chain. The researchers note that scientists still need better, more realistic studies to fully understand the risks before drawing firm conclusions.
Nanoplastics (NPs; <1000 nm) are increasingly recognized as pervasive contaminants in terrestrial ecosystems, yet their environmental behavior and biological impacts remain insufficiently resolved. This review synthesizes evidence from 18 high-quality experimental studies to evaluate the transport mechanisms of nanoplastics in soils, their interactions with soil fauna—particularly earthworms—and their effects on microbial communities. Nanoplastic mobility is governed by soil texture, surface charge interactions, aggregation dynamics, and environmental conditions such as moisture and ionic strength. Bioturbation by earthworms enhances vertical redistribution, while ingestion leads to physiological stress, oxidative damage, and altered nutrient cycling. Microbial responses include shifts in community composition, suppression of enzymatic activities, and changes in metabolic pathways, with implications for soil fertility. Notably, nanoplastics can act as vectors for co-contaminants, amplifying ecological risks. Despite growing evidence of adverse effects, inconsistencies persist due to methodological variability and unrealistic exposure scenarios. This review identifies critical knowledge gaps, including long-term field-scale impacts, standardized detection methods, and mechanistic understanding of nano-bio interactions. Addressing these gaps is essential for accurate risk assessment and sustainable soil management in the context of escalating plastic pollution.