We can't find the internet
Attempting to reconnect
Something went wrong!
Hang in there while we get back on track
Dynamic Analysis of Microplastics in Tokyo Bay Considering Sedimentation Process
AI summary Read the abstract
Researchers developed a mathematical model to analyze the dynamics of microplastics in Tokyo Bay following river inputs, constructing three-component equations representing dissolved-phase, small-particle, and large-particle forms with adsorption-desorption, mineralization, and sedimentation processes. The study used dioxin-based partition coefficient parameters to estimate microplastic concentration distributions across the bay.
海洋生物への影響が懸念されている海洋マイクロプラスチックに対し，東京湾における河川からの流入後の動態解析を数理モデルにより実施した．本文は東京湾を対象として，河川から負荷されるマイクロプラスチックについて，3つの式(溶存態，小粒子及び沈降速度を持つ大粒子吸着態)を組み立て，それぞれの間で吸着・脱着，無機化や沈降の作用を考慮して個数密度の解析手法の展開を図った．マイクロプラスチックの分配係数については，ダイオキシン類を参考にパラメタ解析を実施した．
More Papers Like This
Effect of Boundary Conditions on Three-dimensional Distribution of Microplastics Flowing Into Tokyo Bay
AI summary Read the abstract
Researchers used three-dimensional diffusion analysis to model the distribution of microplastics flowing into Tokyo Bay from rivers, accounting for three forms (dissolved, small-particle adsorbed, large-particle adsorbed) and processes including adsorption, desorption, mineralisation, and sedimentation, finding that boundary conditions at river inflows and the bay mouth significantly influenced the spatial distribution of microplastics across the bay.
Size-specific distribution, morphology, and polymer composition of microplastic particles in surface water and sediments of Tokyo Bay
AI summary Read the abstract
Researchers investigated microplastic particles in surface water and sediments at eight stations in Tokyo Bay during autumn 2023, finding that small MPs (20-100 µm) numerically dominated both matrices at over 70% of total concentration, with distinct size distributions, morphologies, and polymer compositions between the two environmental compartments.
Comprehensive Understanding of Microplastics Inflow Off the Coast of Funabashi
AI summary Read the abstract
Researchers conducted continuous monitoring of microplastic (MP) contamination in rivers, sewage, and coastal waters around Funabashi in Tokyo Bay, finding that MP number densities showed high temporal variability and a gradual decreasing trend, with upstream river sources driving contamination that diminished toward the sea as particles settled into bottom sediments, while sewage was also implicated as a contributor to marine MP pollution.
Microplastic volumes in Tokyo Bay
AI summary Read the abstract
Researchers quantified microplastic volumes across multiple sites in Tokyo Bay, Japan, finding spatial variation linked to urban runoff and river inputs, with surface waters and sediments showing distinct accumulation patterns.
The microplastic dynamics between river surface water and sediment compartments
AI summary Read the abstract
Researchers monitored microplastic distribution in surface water and bottom sediments along an urban river in Japan in August 2022 and 2023, tracking how floating microplastics transported downstream by river flow are deposited into bed sediments. The study aimed to elucidate the exchange dynamics between water column and sediment compartments that account for the discrepancy between observed riverine plastic loads and expected ocean inputs.
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.