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Effect of Boundary Conditions on Three-dimensional Distribution of Microplastics Flowing Into Tokyo Bay
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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.
本研究では，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つの形態（溶存態，小粒子吸着態，大粒子吸着態）を考慮し，吸着・脱着，無機化や沈降の移行過程を3次元の拡散解析と同時に行った．本研究では，河川流入時のマイクロプラスチック形態と湾口からの流入を境界条件として設定し，東京湾全域におけるマイクロプラスチック拡散分布に与える影響を把握した．
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