We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
How do polystyrene microplastics affect the adsorption of copper in soil?
AI summary Read the abstract
Researchers investigated how polystyrene microplastics affect the behavior of copper in soil, finding that the plastics reduced copper adsorption by 3 to 16 percent while increasing its release. The microplastics blocked active binding sites on soil particles and lacked the functional groups needed to hold copper in place. The study suggests that microplastics in contaminated soils could make heavy metals more mobile and potentially more harmful.
Microplastics (MPs) commonly coexist with heavy metals in the soil environment. MPs can influence the activity of heavy metals, and the specific mechanisms need to be further explored. Here, different contents of polystyrene (PS) MPs were added to soil to explore their effects on the adsorption and desorption characteristics of copper (Cu) in soil. The adsorption process was mainly chemical adsorption and belonged to a spontaneous, endothermic reaction. The hydrophobicity of MPs slowed down the adsorption and desorption rates. The main adsorption mechanisms included complexation by oxygen-containing functional groups, ion exchange (accounting for 33.97-36.04 % of the total adsorption amounts), and electrostatic interactions. MPs lacked oxygen-containing functional groups and were predominantly engaged in ion exchange and electrostatic interactions. MPs diluted, blocked the soil, and covered the active sites of soil, which reduced adsorption (3.56-16.18 %) and increased desorption (0.90-2.07 %) of Cu in soil samples, thus increasing the activity and mobility of Cu. These findings provide new insights into the effects of MPs on the fate and risk of heavy metals in soil. ENVIRONMENTAL IMPLICATION: The existing literature concerning the effects of microplastics on the adsorption of heavy metals in soil is insufficient. Our investigation unveiled that the main adsorption mechanisms of different soil samples included complexation by oxygen-containing functional groups, ion exchange (accounting for 33.97-36.04 % of the total adsorption amounts), and electrostatic interactions. MPs lacked oxygen-containing functional groups and were predominantly engaged in ion exchange and electrostatic interactions. MPs diluted, blocked the soil, and covered the active sites of soil, which reduced adsorption (3.56-16.18 %) and increased desorption (0.90-2.07 %) of Cu in soil samples, thus increasing the activity and mobility of Cu.
More Papers Like This
Interfacial interactions between colloidal polystyrene microplastics and Cu in aqueous solution and saturated porous media: Model fitting and mechanism analysis
AI summary Read the abstract
Researchers studied how polystyrene microplastics interact with copper in water and in saturated porous media like soil. They found that microplastics have strong adsorption capacity for copper through electrostatic and chemical bonding, and that copper can inhibit microplastic transport while microplastics may facilitate copper transport through a carrying effect. The findings suggest that interactions between microplastics and heavy metals can significantly influence how both pollutants move through groundwater systems.
Exploring the Role of Polystyrene Microplastics in Cu Binding in Sea Surface Waters: An Experimental Perspective for Future Research
AI summary Read the abstract
The role of polystyrene microplastics in binding copper (Cu) and altering its environmental mobility and toxicity was investigated, finding that microplastics can both adsorb and release copper depending on environmental conditions. This has implications for how microplastics modulate heavy metal hazards in contaminated environments.
Mitigating potential of polystyrene microplastics on bioavailability, uptake, and toxicity of copper in maize (Zea mays L.)
AI summary Read the abstract
This study found that polystyrene microplastics in soil actually reduced copper toxicity in maize plants by binding to the copper and making it less available for plant uptake. While this might seem beneficial, it means microplastics are changing how nutrients and metals move through agricultural soil in unpredictable ways. The findings highlight that microplastic contamination in farmland can alter the chemistry of soil in complex ways that affect crop nutrition and food safety.
Effect of Polystyrene Microplastics on Pb(II) Adsorption onto a Loessial Soil (Sierozem) and Its Mechanism
AI summary Read the abstract
Researchers examined how polystyrene microplastics affect the adsorption of lead onto loessial soil and found that the presence of microplastics reduced lead uptake by the soil. Smaller microplastic particles had a greater inhibitory effect on lead adsorption compared to larger ones, likely due to competitive binding on soil surfaces. The study suggests that microplastic contamination in agricultural soils could alter heavy metal mobility and increase environmental risk.
Adsorption properties and influencing factors of Cu(II) on polystyrene and polyethylene terephthalate microplastics in seawater
AI summary Read the abstract
Researchers investigated how polystyrene and polyethylene terephthalate microplastics adsorb copper ions in seawater, characterizing adsorption kinetics and influencing factors to understand microplastics' role as vectors for heavy metal pollutants in marine environments.
Research digests by email
When a large batch of papers lands in the Atlas, we read through it and send a short write-up of what stood out.