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Susceptibility of Cd Availability in Microplastics Contaminated Paddy Soil: Influence of Ferric Minerals and Sulfate Reduction
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Susceptibility of Cd availability in microplastics contaminated paddy soil: Influence of ferric minerals and sulfate reduction
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When microplastics and cadmium contaminate paddy soil together — a common situation in agricultural areas — microplastics increase the availability of cadmium to plants, raising the risk of cadmium uptake into food crops like rice. The mechanism involves microplastics releasing dissolved organic matter that disrupts iron mineral cycling and promotes sulfate-reducing bacteria, which in turn mobilize cadmium from soil particles. These findings highlight that microplastic pollution in farmland does not act alone — it can amplify the toxicity of co-occurring heavy metal contaminants.
Polypropylene microplastics alter the cadmium adsorption capacity on different soil solid fractions
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Researchers found that polypropylene microplastics reduce soil's ability to bind the toxic heavy metal cadmium, with the effect varying by soil composition and microplastic aging — suggesting that microplastic contamination could indirectly increase the risk of heavy metals leaching into groundwater.
Microplastics in Soils with Contrasting Organic Carbon Content and Clay Fraction Mineralogy: Effects on Copper and Phosphorus Adsorption
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Plastic mulch used in farming can break down into microplastics that stay in the soil, and this study found that these tiny plastic bits can make copper and phosphorus, common soil nutrients and contaminants, more likely to wash away instead of staying put. This matters because looser, more mobile copper and phosphorus can end up leaching into groundwater or nearby streams, potentially polluting the water we drink and use, especially in farmland already exposed to plastic mulch and these chemicals.
Relevance of dissolved organic matter components on the adsorption behaviors of cadmium onto non-biodegradable and biodegradable microplastics in an agricultural soil
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Researchers found that microplastics in agricultural soil — both conventional and biodegradable types — reduce the soil's ability to bind cadmium, a toxic heavy metal, largely by altering organic matter that controls metal mobility. This suggests microplastic contamination could increase cadmium availability in farmland, raising potential food safety concerns.
Interactıon of Micro-Nanoplastics and Heavy Metals in Soil Systems: Mechanism and Implication
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Researchers examined how micro- and nanoplastics interact with heavy metals in soil, finding that plastics can alter metal mobility, bioavailability, and toxicity through adsorption and chemical reactions, raising concern that plastic pollution may worsen the risk posed by existing heavy metal contamination in agricultural and urban soils.
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