We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Aggregation characterization and mechanism of microplastics and suspended sand in the Three Gorges Reservoir
AI summary Read the abstract
Researchers conducted large-scale flume experiments to characterize aggregation between PMMA and PS microplastics and suspended sediment from the Three Gorges Reservoir under shear flow conditions, finding that heteroaggregation produced larger floc sizes than sediment alone and that PMMA formed aggregates more readily than PS due to greater electron transfer and surface charge changes.
本文依据三峡库区悬沙矿物组成和泥沙级配为依据配置沙样，选择长江上游典型微塑料PMMA和PS，在自制大型水箱中开展水流剪切作用下微塑料和泥沙异质聚集实验，分析微—泥絮团的形态特征和聚集机制。结果表明在水流紊动剪切作用下，相比泥沙同质聚集的絮团粒径，微—泥异质聚集的絮团粒径更大，且每毫升样品中微—泥絮团上的微塑料吸附数量随水流剪切率增大而迅速增加。扫描电镜和能谱分析结果表明，在水动力条件下泥沙与PMMA、PS微球发生异质聚集，聚集过程中存在电子转移和化学态的转变，并产生不饱和键 （C C）。由于PMMA官能团的结合能变化比PS大，此过程失电子更多、表面电荷更大，更容易与泥沙发生聚集。
More Papers Like This
Heteroaggregation mechanisms of microplastics with suspended sediments in a reservoir system under variable hydraulic conditions using laboratory flume experiments
AI summary Read the abstract
Scientists studying a major Chinese reservoir found that microplastics stick to sediment particles and form clumps, with the type of plastic affecting how stable these clumps are. This matters because it helps explain where microplastics settle versus travel downstream in waterways, information that could improve pollution tracking and, eventually, efforts to reduce human exposure through drinking water sources.
Turbulence-sediment synergy controls buoyant microplastic settling in the three gorges reservoir
AI summary Read the abstract
Laboratory experiments showed that turbulence and sediment concentration interact synergistically to control the settling and resuspension of buoyant microplastics in water. Understanding these coupled dynamics is essential for modeling microplastic transport and deposition in rivers and coastal zones.
Experimental study on parameterizing microplastic-sediment aggregation
AI summary Read the abstract
Researchers conducted laboratory flocculation experiments to parameterize microplastic-sediment aggregation, testing fibers, fragments, and spheres of varying sizes and densities to characterize how microplastics and sediment form flocs with enhanced settling velocity, with the goal of improving numerical transport models of microplastic fate in rivers and estuaries.
Influence of catastrophic flood on microplastics organization in surface water of the Three Gorges Reservoir, China
AI summary Read the abstract
Microplastic distribution in the Three Gorges Reservoir was analyzed before and after a catastrophic 2020 flood, finding that the flood altered microplastic organization, stability, and polymer composition throughout the reservoir, with implications for microplastic transport to the global ocean.
Role of biophysical flocculation on microplastics and sediment interactions in a microtidal estuary
AI summary Read the abstract
Field surveys and lab experiments in a microtidal estuary found that microplastics flocculate with negatively charged clastic sediment through biophysical processes, influencing how microplastics are transported, aggregated, and deposited in estuarine 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.