We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Efficient degradation of polystyrene microplastic pollutants in soil by dielectric barrier discharge plasma
AI summary Read the abstract
Researchers used a plasma-based technique called dielectric barrier discharge to break down polystyrene microplastics in soil and achieved a degradation rate of nearly 99 percent within one hour. The process works by generating reactive oxygen species that chemically decompose the plastic, converting most of it into carbon dioxide. The study presents this technology as a fast and energy-efficient approach for treating microplastic-contaminated soil.
In this study, the atmospheric dielectric barrier discharge (DBD) plasma was proposed for the degradation of polystyrene microplastics (PS-MPs) for the first time, due to its ability to generate reactive oxygen species (ROS). The local temperature in plasma was found to play a crucial role, as it enhanced the degradation reaction induced by ROS when it exceeded the melting temperature of PS-MPs. Factors including applied voltage, air flow rate, and PS-MPs concentration were investigated, and the degradation products were analyzed. High plasma energy and adequate supply of ROS were pivotal in promoting degradation. At 20.1 kV, the degradation efficiency of PS-MPs reached 98.7% after 60 min treatment, with gases (mainly CO, accounting for 96.4%) as the main degradation products. At a concentration of 1 wt%, the PS-MPs exhibited a remarkable conversion rate of 90.6% to CO, showcasing the degradation performance and oxidation degree of this technology. Finally, the degradation mechanism of PS-MPs combined with the detection results of ROS was suggested. This work demonstrates that DBD plasma is a promising strategy for PS-MPs degradation, with high energy efficiency (8.80 mg/kJ) and degradation performance (98.7% within 1 h), providing direct evidence for the rapid and comprehensive treatment of MP pollutants.
More Papers Like This
Complete degradation of polystyrene microplastics through non-thermal plasma-assisted catalytic oxidation
AI summary Read the abstract
Researchers developed a two-stage non-thermal plasma system for degrading polystyrene microplastics at low temperatures. Using dielectric barrier discharge plasma coupled with a catalytic oxidation step, they achieved near-complete conversion of polystyrene particles to carbon dioxide within 60 minutes. The study demonstrates a promising technology for breaking down microplastic pollution without requiring high-temperature incineration.
Dielectric barrier discharge plasma for the remediation of microplastic-contaminated soil from landfill
AI summary Read the abstract
Researchers applied dielectric barrier discharge plasma to actual microplastic-contaminated landfill soil and found that plasma treatment effectively degraded multiple polymer types in situ, offering a promising non-biological remediation approach for landfill soils with high microplastic burdens.
Low-Density Polyethylene Degradation and Energy Yield Using Dielectric Barrier Discharge under Various Electrical Conditions
AI summary Read the abstract
Researchers used dielectric barrier discharge plasma to degrade low-density polyethylene plastic under varying electrical conditions, evaluating both degradation efficiency and energy yield. The approach offers a faster alternative to conventional plastic degradation methods for addressing microplastic pollution.
Degradation of polyethylene microplastics using high-repetition-rate pulsed dielectric barrier discharge plasma in air under mild conditions
AI summary Read the abstract
Researchers developed a method for degrading polyethylene microplastics using high-repetition-rate pulsed dielectric barrier discharge plasma in air, achieving complete degradation of 0.1 g of PE microplastics within 3 hours at 15 kV and 20 kHz without catalysts or additional carrier gases.
Remediation of Soil Contaminated with Microplastics: Strategies and Practical Implications
AI summary Read the abstract
Microplastics in soil are a growing concern since they can end up in the food we grow and eventually in our bodies, so scientists are testing ways to clean them out of dirt. This review of existing research finds that fast chemical and heat-based treatments can remove nearly all microplastics but use a lot of energy, while slower, gentler methods like using special charcoal (biochar) or soil microbes are more practical for widespread use and also improve soil health and crop growth. The most promising approach combines these methods, though more research is still needed to confirm how well they actually break down the plastic rather than just filtering it out.
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.