Dissolved oxygen control on manganese release and component-selective DOM transport at the sediment–water interface: A mechanistic geochemical study of lake biwa sediments

Yasuro Fuse

doi:10.1016/j.apgeochem.2026.106969

Dissolved oxygen control on manganese release and component-selective DOM transport at the sediment–water interface: A mechanistic geochemical study of lake biwa sediments

2026-07-08

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Yasuro Fuse *

H

Hitomi Tsuda

H

Hiroko Okuda

K

Kazuhide Hayakawa

DOI：10.1016/j.apgeochem.2026.106969

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• Anoxia released Mn strongly; 2.6 mg L-1 DO suppressed mobilization. • Fe and P stayed low, indicating strong sediment retention pathways. • EEMs revealed selective export of FA-like DOM over protein-like signals. • Nernst and diffusion frameworks explain coupled Mn and DOM behavior. • Lake Biwa incubations provide testable hypotheses for hypoxic lakes.

Dissolved oxygen control on manganese release and component-selective DOM transport at the sediment–water interface: A mechanistic geochemical study of lake biwa sediments

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